CN112615550A - Elevator, multifunctional elevator intelligent power supply and conversion method thereof - Google Patents

Elevator, multifunctional elevator intelligent power supply and conversion method thereof Download PDF

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Publication number
CN112615550A
CN112615550A CN202011461687.0A CN202011461687A CN112615550A CN 112615550 A CN112615550 A CN 112615550A CN 202011461687 A CN202011461687 A CN 202011461687A CN 112615550 A CN112615550 A CN 112615550A
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CN
China
Prior art keywords
power supply
circuit
current power
output
frequency transformer
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Pending
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CN202011461687.0A
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Chinese (zh)
Inventor
李学锋
郝欢
朱厚清
金立伟
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Suzhou Inovance Technology Co Ltd
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Suzhou Inovance Technology Co Ltd
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Priority to CN202011461687.0A priority Critical patent/CN112615550A/en
Publication of CN112615550A publication Critical patent/CN112615550A/en
Priority to PCT/CN2021/117895 priority patent/WO2022121416A1/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
    • H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
    • H02M5/10—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers
    • H02M5/12—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers for conversion of voltage or current amplitude only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Elevator Control (AREA)

Abstract

The invention discloses an elevator, a multifunctional elevator intelligent power supply and a conversion method thereof, wherein the multifunctional elevator intelligent power supply comprises: the power frequency transformer is used for accessing an alternating current power supply, and outputting the alternating current power supply after voltage conversion; a control device; the brake control circuit is used for receiving the alternating current power supply output by the power frequency transformer and controlling the elevator brake to work under the control of the control device; the system power supply circuit is used for converting an alternating current power supply output by the power frequency transformer into a direct current power supply and supplying power to the control device; and the standby power supply is connected to the system power supply circuit, outputs a direct current power supply when the power frequency transformer loses power, and correspondingly outputs at least one path of alternating current power supply and/or at least one path of direct current power supply after inversion conversion and voltage conversion of the system power supply circuit respectively so as to supply power for the elevator brake and the control device respectively. The intelligent power supply of the functional elevator can improve the coordination among a plurality of power supply devices in the elevator.

Description

Elevator, multifunctional elevator intelligent power supply and conversion method thereof
Technical Field
The invention relates to the technical field of power supplies, in particular to an elevator, a multifunctional elevator intelligent power supply and a conversion method thereof.
Background
Along with the continuous increase of current elevator system function and operational mode, adopt to dispose a plurality of power supply unit in order to supply power to different functional module, if: the brake release device comprises a main system power supply, a band-type brake power supply, an ARD rescue power supply and an electric brake release power supply.
In the existing elevator, because each power supply is respectively provided with an independent logic control system, the power supplies cannot work coordinately, so that each power supply is complicated to maintain; different logic systems cannot perform time sequence control, so that the system is easy to misreport faults; and the ARD rescue power supply and the electric brake release power supply only work when the power grid input is abnormal, so that the utilization rate is very low, and the problems of competition for the elevator control right in a plurality of logic control systems in the rescue process exist.
Disclosure of Invention
The invention mainly aims to provide a multifunctional elevator intelligent power supply, a power supply device and lifting equipment, and aims to solve the problem of poor coordination among a plurality of power supply devices.
In order to achieve the above object, the present invention provides a multifunctional elevator intelligent power supply, which comprises:
the power frequency transformer is used for accessing an alternating current power supply, and outputting the accessed alternating current power supply after voltage conversion;
a control device;
the brake control circuit is used for receiving the alternating current power supply output by the power frequency transformer and controlling the elevator brake to work under the control of the control device;
the system power supply circuit is used for converting an alternating current power supply output by the power frequency transformer into a direct current power supply under the control of the control device and supplying power to the control device; and
and the standby power supply is used for being connected into the system power supply circuit, outputting a direct current power supply when the power frequency transformer loses power, correspondingly outputting at least one path of alternating current power supply and/or at least one path of direct current power supply after inversion conversion and voltage conversion of the system power supply circuit respectively, outputting the alternating current power supply to the band-type brake control circuit through the power frequency transformer, and outputting the direct current power supply to supply power to the control device.
Optionally, the system power supply circuit comprises:
a bidirectional AC-DC conversion circuit having a first terminal and a second terminal, the first terminal of the bidirectional AC-DC conversion circuit being connected to the industrial frequency transformer; the bidirectional AC-DC conversion circuit is used for converting the alternating current power supply output by the power frequency transformer into a direct current power supply and then outputting the direct current power supply; and
the input end of the DC-DC conversion circuit is connected with the second end of the bidirectional AC-DC conversion circuit, and the output end of the DC-DC conversion circuit is connected with the control device; the DC-DC conversion circuit is used for converting the voltage of the direct current power supply output by the bidirectional AC-DC conversion circuit and outputting the converted direct current power supply to the control device;
the standby power supply is connected with the common connecting end of the bidirectional AC-DC conversion circuit and the DC-DC conversion circuit; when the power frequency transformer loses power, the standby power supply correspondingly outputs one path of alternating current power supply and one path of direct current power supply through the bidirectional AC-DC conversion circuit and the DC-DC conversion circuit respectively;
the direct current power supply output by the standby power supply is divided into two paths, wherein one path of direct current power supply is inverted into an alternating current power supply through the bidirectional AC-DC conversion circuit and is output to the band-type brake control circuit through the power frequency transformer; and the other path of the direct current is converted by direct current voltage and then output to supply power for the control device.
Optionally, the power frequency transformer includes: a first coil, a second coil, a third coil and a fourth coil; the first coil is used for being connected with the alternating current power supply; the second coil and the third coil are connected with the contracting brake control circuit and used for outputting the alternating current power supply accessed by the first coil to the contracting brake control circuit through the second coil and the third coil after corresponding voltage conversion; the fourth coil is connected with the system power supply circuit and used for outputting an alternating current power supply accessed by the first coil to the system power supply circuit after corresponding voltage conversion;
and the power frequency transformer is also used for converting the voltage of the alternating current power supply accessed by the fourth coil and outputting the converted voltage to the band-type brake control circuit through the third coil and the fourth coil when the power frequency transformer loses power.
Optionally, the DC-DC conversion circuit includes: a first DC-DC conversion circuit and a second DC-DC conversion circuit;
the first DC-DC conversion circuit is connected with the second end of the bidirectional AC-DC conversion circuit, and the first DC-DC conversion circuit is used for performing corresponding voltage conversion on a direct current power supply output by the second end of the bidirectional AC-DC conversion circuit and outputting the converted direct current power supply; the first DC-DC conversion circuit is also used for converting the direct current power supply output by the standby power supply into direct current voltage and outputting the direct current voltage when the power frequency transformer is in power failure;
the second DC-DC conversion circuit is connected with the common end of the first DC-DC conversion circuit and the bidirectional AC-DC conversion circuit; the second DC-DC conversion circuit is used for performing corresponding voltage conversion on the direct-current power supply output by the second end of the bidirectional AC-DC conversion circuit and then outputting the direct-current power supply; and the second DC-DC conversion circuit is also used for converting the direct-current power supply output by the standby power supply into direct-current voltage and outputting the direct-current voltage when the power frequency transformer loses power.
Optionally, the control device comprises a main control device and an auxiliary control device; the power supply end of the main control device is connected with the output end of the first DC-DC conversion circuit, and the power supply end of the auxiliary control device is connected with the output end of the second DC-DC conversion circuit; the auxiliary control device is used for controlling the band-type brake control circuit and the bidirectional AC-DC conversion circuit to work according to the received power supply control signal output by the main control device.
Optionally, the multifunctional elevator intelligent power supply further comprises:
the secondary rescue circuit is connected between the standby power supply and the system power supply circuit; the secondary rescue circuit is used for controlling the standby power supply to input a direct current power supply during secondary rescue according to the accessed key signal.
Optionally, the multifunctional elevator intelligent power supply further comprises:
the emergency direct current power supply circuit is connected with the standby power supply; and the emergency direct current power supply circuit is used for outputting an emergency direct current power supply under the control of the control device when the power frequency transformer loses power.
Optionally, the multifunctional elevator intelligent power supply further comprises:
the emergency alternating current power supply circuit is connected with the first coil of the power frequency transformer;
the power frequency transformer is also used for outputting an alternating current power supply input by the fourth coil to an emergency alternating current power supply circuit through the first coil after overvoltage conversion when the power frequency transformer is in power failure; the emergency alternating current power supply circuit is used for outputting an emergency alternating current power supply under the control of the control device.
Optionally, the multifunctional elevator intelligent power supply further comprises:
the LC filter circuit is connected between the power frequency transformer and the first end of the bidirectional AC-DC conversion circuit, and is used for filtering an alternating current power supply output by the fourth coil of the power frequency transformer and outputting the filtered alternating current power supply to the bidirectional AC-DC conversion circuit; the LC filter circuit is also used for filtering and outputting the alternating current power supply which is output by the bidirectional AC-DC conversion circuit in an inversion manner to the power frequency transformer when the power frequency transformer loses power;
the bus capacitor pre-charging circuit is connected between the bidirectional AC-DC conversion circuit and the DC-DC conversion circuit; the bus capacitor pre-charging circuit is used for pre-charging the direct current bus capacitor under the control of the control device at the power-on initial stage of the multifunctional elevator intelligent power supply.
The invention also provides an elevator, which comprises a frequency converter and the multifunctional elevator intelligent power supply; and the frequency converter is connected with the emergency direct current power supply circuit.
The invention also provides a conversion method of the multifunctional elevator intelligent power supply, which is based on the multifunctional elevator intelligent power supply; or, based on an elevator as described above;
the conversion method of the multifunctional elevator intelligent power supply comprises the following steps:
when the power frequency transformer is powered on, the power frequency transformer respectively outputs two paths of alternating current power supplies, wherein one path of alternating current power supply is output to the band-type brake control circuit, and the other path of alternating current power supply is converted into a direct current power supply through the system power supply circuit and then respectively outputs the power supply of the control device and the standby power supply;
when the power frequency transformer loses power, the standby power supply outputs a direct current power supply, the direct current power supply is converted into at least one path of alternating current power supply and/or at least one path of direct current power supply through the system power supply circuit, the alternating current power supply is output to the band-type brake control circuit through the power frequency transformer, and the direct current power supply is output to the control device.
Optionally, when the power frequency transformer is powered on, the power frequency transformer outputs two paths of alternating current power supplies respectively, wherein one path of alternating current power supply outputs to the band-type brake control circuit, and the other path of alternating current power supply outputs the power supplied by the control device and the standby power supply respectively after being converted into a direct current power supply by the system power supply circuit, and the steps include:
when the power frequency transformer is powered on, the power frequency transformer respectively outputs two paths of alternating current power supplies;
one path of alternating current power supply is output to the band-type brake control circuit; the other path of alternating current power supply is output to a bidirectional AC-DC conversion circuit in the system power supply circuit;
the other path of alternating current power supply is converted by the bidirectional AC-DC conversion circuit and then correspondingly outputs two paths of direct current power supplies, wherein one path of direct current power supply is output to the standby power supply, and the other path of direct current power supply is output to the control device through the DC-DC conversion circuit;
optionally, the another direct-current power supply is output to the control device through the DC-DC conversion circuit, and specifically:
and the other path of direct current power supply is output to the main control device and the auxiliary control device through the first DC-DC conversion circuit and the second DC-DC conversion circuit respectively.
Optionally, when the power frequency transformer loses power, the standby power supply outputs a dc power supply, and the dc power supply is converted into at least one path of ac power supply and/or at least one path of dc power supply by the system power supply circuit, the ac power supply is output to the band-type brake control circuit by the power frequency transformer, and the step of outputting the dc power supply to the control device includes:
when the power frequency transformer loses power, the standby power supply outputs a direct current power supply;
the direct current power supply is converted into at least one path of alternating current power supply through the bidirectional AC-DC conversion circuit, and the alternating current power supply is output to the band-type brake control circuit through the power frequency transformer;
and/or the alternating current power supply is converted into at least one path of direct current power supply through the DC-DC conversion circuit, and the direct current power supply is output to the control device.
Optionally, after the step of outputting the dc power from the standby power supply, the method for converting the intelligent power supply of the multi-function elevator further includes:
the direct current power supply is also used as an emergency direct current power supply to be output through the emergency direct current power supply circuit;
the step that the direct current power supply is converted into at least one path of alternating current power supply through the bidirectional AC-DC conversion circuit, and the alternating current power supply is output to the band-type brake control circuit through the power frequency transformer further comprises the following steps:
the power frequency transformer also outputs one path of alternating current power supply, and the path of alternating current power supply passes through the emergency alternating current power supply circuit to be output as an emergency direct current power supply.
Optionally, when the power frequency transformer loses power, the standby power supply outputs a dc power supply, and the dc power supply is converted into at least one ac power supply and/or at least one dc power supply by the system power supply circuit, the ac power supply is output to the band-type brake control circuit by the power frequency transformer, and after the dc power supply is output to the control device, the method for converting an intelligent power supply of a multifunctional elevator further includes:
the standby power supply is also used for outputting at least one path of alternating current power supply to the band-type brake control circuit through the system power supply circuit when the secondary rescue circuit receives the key signal; and/or at least one direct current power supply is connected to the control device.
The multifunctional elevator intelligent power supply provided by the invention is provided with the power frequency transformer, the control device, the band-type brake control circuit, the system power supply circuit and the standby power supply, the accessed alternating current is subjected to voltage conversion through the power frequency transformer and then is output, and under the control of the control device, the band-type brake control circuit and the system power supply circuit are respectively used for supplying power to the elevator band-type brake and the control device during normal work after the alternating current power supply output by the power frequency transformer is subjected to corresponding voltage change; and when the power frequency transformer loses power, the direct current power output by the standby power supply can be correspondingly converted into at least one path of alternating current power and/or at least one path of direct current power after passing through the system power supply circuit, and the alternating current power and/or the direct current power can be respectively output to the brake control circuit and the control device so as to supply power for the ARD rescue and the electric brake release rescue. The intelligent power supply of the functional elevator at least integrates a band-type brake power supply, a system power supply, an ARD rescue power supply and an electric brake release power supply together and is subjected to the same coordination management by the control device, so that the coordination among a plurality of power supply devices is improved, the maintenance is easy, the unified control is convenient, the stability of the power supply is improved, and the probability of false alarm faults is reduced; and the rescue power supply and the normal power supply share the same power supply structure, so that the utilization rate of the rescue power supply is improved, the power supply integration level is greatly improved, the equipment volume is reduced, and the cost is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a functional module schematic diagram of an embodiment of the intelligent power supply for a multifunctional elevator;
FIG. 2 is a schematic circuit diagram of an embodiment of the intelligent power supply for a multifunctional elevator;
fig. 3 is a schematic flow chart of an embodiment of the method for converting the intelligent power supply of the multifunctional elevator of the invention;
fig. 4 is a schematic flow chart of another embodiment of the intelligent power supply conversion method for the multifunctional elevator of the invention;
fig. 5 is a schematic flow chart of another embodiment of the intelligent power supply conversion method for the multifunctional elevator of the invention;
fig. 6 is a schematic flow chart of another embodiment of the intelligent power supply conversion method for the multifunctional elevator of the invention;
fig. 7 is a flow chart of another embodiment of the intelligent power supply conversion method for the multifunctional elevator.
The reference numbers illustrate:
Figure BDA0002830062550000061
Figure BDA0002830062550000071
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a multifunctional elevator intelligent power supply which can be applied to lifting equipment such as an elevator, a lifter, a lifting platform and the like.
Referring to fig. 1 to 2, in an embodiment of the present invention, the multifunctional elevator intelligent power supply includes:
the power frequency transformer 100 is used for accessing an alternating current power supply, and outputting the accessed alternating current power supply after voltage conversion;
a control device 200;
the brake control circuit 300 is used for receiving the alternating-current power supply output by the power frequency transformer 100 and controlling the elevator brake to work under the control of the control device 200;
a system power supply circuit 400, configured to convert an ac power output by the power frequency transformer 100 into a dc power under the control of the control device 200, and supply power to the control device 200;
the standby power supply 500 is used for being connected to the system power supply circuit 400, outputting a direct current power supply when the power frequency transformer 100 loses power, correspondingly outputting at least one path of alternating current power supply and/or at least one path of direct current power supply after inversion conversion and voltage conversion of the system power supply circuit 400, outputting the alternating current power supply to the band-type brake control circuit 300 through the power frequency transformer 100, and outputting the direct current power supply to the control device 200 for power supply.
In this embodiment, the power frequency transformer 100 may be implemented by an isolation transformer or an autotransformer, and the AC power source connected to the power frequency transformer 100 may be a grid AC power or an AC voltage output by another AC power source. When the isolation transformer is used for realizing the isolation transformer, one primary coil and a plurality of secondary coils can be arranged, and different alternating currents can be respectively output by adjusting the turn ratio of each secondary coil to the primary coil. When the autotransformer is used for realizing the alternating current transformer, the primary coil and the secondary coil form a group of common coils, and a plurality of output terminals are arranged on the common coils, so that each output terminal can output different alternating currents according to the turn number of the connected coil and the turn ratio of the common coil. It will be appreciated that when implemented using an autotransformer, the output voltage at each output terminal can be adjusted in real time by providing a sliding output terminal. The number of the secondary coils and the turn ratio of each secondary coil are determined according to actual needs, and are not limited herein.
The control device 200 can be implemented by microprocessors such as an MCU, a DSP, or an FPGA, and a person skilled in the art can integrate some hardware circuits and software programs or algorithms into the control device 200, and can connect the multifunctional elevator intelligent power supply and each function module in the elevator by using various interfaces and circuits, and can perform each function of the multifunctional elevator intelligent power supply and the elevator by operating or executing the software program and/or module in the control device 200 and calling data in the control device 200, thereby performing overall monitoring on the multifunctional elevator intelligent power supply and the elevator, and enabling the multifunctional elevator intelligent power supply to meet different power supply requirements of the elevator under different conditions. For example: a plurality of hardware circuits such as a voltage detection circuit, an ADC conversion circuit, and a filter may be integrated in the control device 200; the voltage detection circuit can detect the alternating voltage input by the power frequency transformer 100 through a relevant port of the control device 200 and output a corresponding voltage detection signal to the ADC conversion circuit, and the ADC conversion circuit can convert the voltage detection signal of the analog signal into a digital signal and then compare the voltage detection signal converted into the digital signal with a reference voltage signal in the memory to determine whether the power frequency transformer 100 loses power; when the fault is judged to be normal, the control device 200 controls the multifunctional elevator intelligent power supply to supply power to the functional modules required by the normal operation of the elevator so as to control the corresponding modules to work normally; and when the power failure is judged to be power failure, the intelligent power supply of the multifunctional elevator is controlled to supply power for the functional module required by rescue, so that the corresponding functional module is controlled to perform rescue action.
The band-type brake control circuit 300 may be implemented by using a plurality of switching devices and a rectifier bridge, wherein the switching devices may be one or more combinations of a low-voltage ac relay and a low-voltage ac contactor. The brake control circuit 300 is configured to, under the control of the control device 200, perform corresponding conversion on the received alternating current and output the converted alternating current to the brake device of the elevator, so as to provide a corresponding power supply for the brake device in different operation states of the elevator. For example: when the elevator works normally, the brake control circuit 300 can provide power supply voltage for the elevator brake under the control of the control device 200, so that the elevator can move to a corresponding floor; the power supply voltage can be cut off under the control of the control device 200, so that the band-type brakes are tightly held, and the elevator is controlled to stop at the appointed floor.
The system power supply circuit 400 is configured to convert ac power output by the power frequency transformer 100 into dc power and supply power to the control device 200. When the elevator normally operates, the system power supply circuit 400 is used for supplying power to a microprocessor and a functional circuit which are used for controlling the normal operation of the elevator in the control device 200 so as to maintain the normal operation function of the elevator; for example, power is supplied to the lighting control circuit in the control device 200 so that the control device 200 can control the lighting brightness in the elevator according to time.
The backup power supply 500 may be implemented using a battery pack or other dc power supply. The standby power supply 500 is used for outputting a direct current power supply to the system power supply circuit 400 when the power loss of the power frequency transformer 100 is caused by the power failure of the power grid or the primary side failure of the power frequency transformer 100. In practical application, the ac power and the dc power outputted by the system power supply circuit 400 are determined according to actual needs, and are not limited herein; the quantity of each output power supply is matched with the quantity of functional modules needing emergency power supply in the elevator when the power frequency transformer 100 loses power; in other optional embodiments, when the power frequency transformer 100 loses power, the dc power supply units such as the control device 200 and the like may be powered by an independent standby dc power supply, or the ac power supply units such as the band-type brake control circuit 300 and the like may be powered by an independent ac standby power supply, so that the system power supply circuit 400 may only output at least one path of ac power supply or dc power supply to supply power to the corresponding dc power supply unit/ac power supply unit; and it can be understood that the control device may further include a plurality of control units using different dc power supplies to supply power to other functional modules, and the band-type brake control circuit may also include a plurality of functional modules using different ac power supplies to supply power. The dc power output from the standby power supply 500 can be converted by the system power supply circuit 400 and then output to the control device 200 to supply power to the microprocessor of the control device 200 for rescue, so that the control device 200 can run the stored related software/program or algorithm to perform ARD rescue or electric brake release rescue. Under the control of the relevant program of the control device 200, the system power supply circuit 400 can invert the direct current power supply to be converted into an alternating current power supply, and the alternating current power supply is output to the brake control circuit 300 through the power frequency transformer 100, so that the elevator brake can perform corresponding actions according to the control signal of the control device 200 in the ARD rescue or the electric brake release rescue. In the ARD rescue, the control device 200 can control the band-type brake control circuit 300 to supply power to the elevator band-type brake according to a stored rescue program so as to drive the elevator to reach a nearby floor, and the band-type brake control circuit 300 cuts off the power supply of the elevator band-type brake under the control of the control device 200 when the elevator arrives, so that the elevator stops at the floor, and the control device 200 opens the elevator door after the elevator arrives to rescue trapped passengers; in the electric brake release rescue, the control device 200 controls the power supply state of the elevator brake according to the key signal input by professional rescuers, so that the elevator is controlled to stop at a specified position for rescue.
The multifunctional intelligent elevator power supply provided by the invention is provided with a power frequency transformer 100, a control device 200, a band-type brake control circuit 300, a system power supply circuit 400 and a standby power supply 500, and outputs the accessed alternating current after voltage conversion through the power frequency transformer 100, and under the control of the control device 200, the band-type brake control circuit 300 and the system power supply circuit 400 are respectively used for supplying power to an elevator band-type brake and the control device 200 during normal work after the alternating current power supply output by the power frequency transformer 100 is subjected to corresponding voltage change; when the power frequency transformer 100 loses power, the dc power output by the standby power supply 500 may be converted into at least one ac power and/or at least one dc power through the system power supply circuit 400, and the ac power and/or the dc power may be output to the internal contracting brake control circuit 300 and the control device 200, respectively, to supply power for ARD rescue and electric brake release rescue. The multifunctional elevator intelligent power supply at least integrates a band-type brake power supply, a system power supply, an ARD rescue power supply and an electric brake release power supply (the existing elevator is separately provided with the ARD rescue power supply and the electric brake release power supply to respectively supply power for the ARD rescue and the electric brake release rescue) in the existing elevator and performs the same coordination management by the control device 200, so that the coordination among a plurality of power supply devices is improved, the maintenance is easy, the unified control is convenient, the stability of the power supply is improved, and the probability of false alarm faults of the system is reduced; and the rescue power supply and the normal power supply share the same power supply structure, so that the utilization rate of the rescue power supply is improved, the power supply integration level is greatly improved, the equipment volume is reduced, and the cost is reduced.
Referring to fig. 1 to 2, in an embodiment of the present invention, the system power supply circuit 400 includes:
a bidirectional AC-DC conversion circuit 410, wherein the bidirectional AC-DC conversion circuit 410 has a first terminal and a second terminal, and the first terminal of the bidirectional AC-DC conversion circuit 410 is connected with the industrial frequency transformer 100; the bidirectional AC-DC conversion circuit 410 is configured to convert an AC power output by the power frequency transformer 100 into a DC power and output the DC power;
a DC-DC conversion circuit 420, an input terminal of the DC-DC conversion circuit 420 being connected to a second terminal of the bidirectional AC-DC conversion circuit 410, and an output terminal of the DC-DC conversion circuit 420 being connected to the control device 200; the DC-DC conversion circuit 420 is configured to perform voltage conversion on the DC power output by the bidirectional AC-DC conversion circuit 410 and output the converted DC power to the control device 200;
the backup power supply 500 is connected to a common connection terminal of the bidirectional AC-DC conversion circuit 410 and the DC-DC conversion circuit 420; when the power frequency transformer 100 loses power, the standby power supply correspondingly outputs one path of alternating current power supply and one path of direct current power supply through the bidirectional AC-DC conversion circuit and the DC-DC conversion circuit respectively;
the method specifically comprises the following steps: the direct current power supply output by the standby power supply 500 is divided into two paths, one path is inverted into an alternating current power supply through the bidirectional AC-DC conversion circuit 410, and is output to the brake control circuit 300 through the power frequency transformer 100; and the other path of the direct current is converted by direct current voltage and then output to supply power for the control device.
In this embodiment, the bidirectional AC-DC conversion circuit 410 may be implemented by constructing a bridge structure with a plurality of switching tubes; the switch tube can be formed by connecting a switch device and a one-way conduction element in parallel, the switch device preferably adopts a semiconductor switch device, and can be any one or combination of an MOS tube, a SIC and an IGBT; the unidirectional conducting element can be a Schottky diode or a parasitic diode carried by the semiconductor switching device. During normal operation, the plurality of switching tubes in the bidirectional AC-DC conversion circuit 410 are configured to receive the plurality of control signals output by the control device 200, respectively, so that the bidirectional AC-DC conversion circuit 410 is in a rectification state, and the alternating-current voltage output by the power frequency transformer 100 is rectified into direct-current voltage and then output. It can be understood that two conditions exist in the rectification state, the first condition is that the switching devices in the switching tubes are controlled to be closed by various control signals, and the alternating current only flows through the one-way conduction element to be output; in the second case, the plurality of control signals control the switching devices in the plurality of switching tubes to conduct after the single-phase conducting element, so as to perform synchronous rectification.
The DC-DC conversion circuit 420 may be implemented using a DC-DC boost circuit or a DC-DC buck circuit. The DC-DC conversion circuit 420 is connected to the second end of the bidirectional AC-DC conversion circuit 410 through the positive DC bus PSB _ DC + and the negative DC bus PSB _ DC-, so as to perform corresponding step-up/step-down conversion on the DC voltage output by the bidirectional AC-DC conversion circuit 410, and output the DC voltage to the control device 200 to supply power to the control device.
When the power frequency transformer 100 loses power, the DC power output by the standby power supply 500 is input to the DC-DC conversion circuit 420 through the DC buses (PSB _ DC + and PSB _ DC-), and is supplied to the control device 200 after corresponding voltage conversion; the DC power output by the standby power supply 500 is also input to the second end of the bidirectional AC-DC conversion circuit 410 through the DC buses (PSB _ DC + and PSB _ DC-), and at this time, when detecting that the power frequency transformer 100 is out of power, the control device outputs a corresponding control signal to make the bidirectional AC-DC conversion circuit 410 in an inversion state, so that the bidirectional AC-DC conversion circuit 410 can invert the DC power input by the second end into an AC power and output the AC power, thereby realizing corresponding output of one AC power and one DC power. In this embodiment, when the power frequency transformer 100 loses power, the system power supply circuit 400 outputs one ac power source and one dc power source.
In an alternative embodiment, the bidirectional AC-DC converting circuit 410 is implemented by using 4N-MOS transistors (Q1-Q4), the N-MOS transistors (Q1-Q4) have parasitic diodes, and the bidirectional AC-DC converting circuit 410 is configured to change its rectifying/inverting state according to the received PWM control signal. So configured, the control device 200 can obtain the supply voltage under any condition, so that it can coordinate the operation of each power supply under different operation states of the elevator.
Referring to fig. 1 to fig. 2, in an embodiment of the present invention, the power frequency transformer 100 includes: a first coil, a second coil, a third coil and a fourth coil; the first coil is used for being connected with the alternating current power supply; the second coil and the third coil are connected to the internal contracting brake control circuit 300, so that the ac power supply connected to the first coil is respectively converted by corresponding voltages and then output to the internal contracting brake control circuit by the second coil and the third coil; the fourth coil is connected to the system power supply circuit 400, so that the ac power received by the first coil is output to the system power supply circuit 400 after being subjected to corresponding voltage conversion;
the power frequency transformer 100 is further configured to, when the power frequency transformer 100 loses power, perform voltage conversion on the ac power supply connected to the fourth coil, and output the converted ac power supply to the internal contracting brake control circuit 300 through the third coil and the fourth coil.
In this embodiment, the second coil and the third coil of the power frequency transformer 100 output two voltages to the internal contracting brake control circuit 300 according to the turn ratio between the second coil and the first coil, wherein the voltage with the higher voltage value is the strong voltage, and the voltage with the lower voltage value is the holding voltage; when the elevator brake is opened, a large moment is needed, so that a strong excitation voltage with a high voltage value is needed for driving, and after the elevator brake is opened, the elevator runs normally and can be switched to a maintaining voltage with a low voltage value, so that the elevator brake is kept in an open state. The fourth coil is configured to output corresponding ac power to the system power supply circuit 400 according to a turn ratio between itself and the first coil. When the power frequency transformer 100 loses power, the fourth coil is used for accessing alternating current output after being inverted by the bidirectional AC-DC conversion circuit 410; at this time, the fourth coil can be regarded as a primary coil, and the fourth coil generates a corresponding induced electromotive force in the first coil according to the turn ratio, so that the second coil and the third coil also generate an induced electromotive force having a value equal to that in normal operation according to the turn ratio of the second coil and the first coil, respectively, and output the induced electromotive force to the internal contracting brake control circuit 300.
In an alternative embodiment, the first coil is connected to a 220V grid alternating-current voltage through a live line L and a neutral line N, the second coil and the third coil output 110V and 80V alternating-current voltages to the internal contracting brake control circuit 300 respectively, and the internal contracting brake control circuit 300 is constructed by a double-input relay K1, two groups of contactors (K2, K3) and a rectifier bridge. The double-input relay K1 is used for respectively accessing 110V and 80V alternating-current voltages; and the double-input relay K1 and two groups of contactors (K2, K3) are switched on/off under the control of the control device 200; specifically, the control device 200 controls the dual-input relay K1 and the contactors (K2, K3) to firstly connect the strong voltage 110V and control the power supply time to be 2S, so that the internal contracting brake is fully opened, and then controls the dual-input relay K1 to be switched to the maintenance voltage 80V until the elevator reaches the corresponding floor, and then controls the dual-input relay K1 to be disconnected to stop power supply. It will be appreciated that, due to safety regulations, the number of sets of contactors is at least two; the power supply time of the strong voltage is determined according to a specific setting, and is not limited herein. The elevator intelligent power supply integrates the power supply structure which normally works and the rescue power supply structure into a whole by utilizing the electromagnetic induction among a plurality of coils in the power frequency transformer 100, so that the rescue power supply structure is not only used when the power grid is abnormal, and the utilization rate of the power supply device is improved to 100 percent.
Referring to fig. 1 to 2, in an embodiment of the present invention, the DC-DC conversion circuit 420 includes: a first DC-DC conversion circuit 421 and the second DC-DC conversion circuit 422;
the first DC-DC conversion circuit 421 is connected to the second end of the bidirectional AC-DC conversion circuit 410, and the first DC-DC conversion circuit 421 is configured to perform corresponding voltage conversion on the direct-current power supply output by the second end of the bidirectional AC-DC conversion circuit 410 and output the converted direct-current power supply; the first DC-DC conversion circuit 421 is further configured to convert a DC voltage of the DC power output by the standby power supply 500 and output the converted DC voltage when the power frequency transformer 100 loses power.
The second DC-DC conversion circuit 422 is connected to a common terminal of the first DC-DC conversion circuit 421 and the bidirectional AC-DC conversion circuit 410; the second DC-DC conversion circuit 422 is configured to perform corresponding voltage conversion on the DC power output by the second end of the bidirectional AC-DC conversion circuit 410 and output the converted DC power; the second DC-DC conversion circuit 422 is further configured to convert the DC voltage of the DC power output by the standby power supply 500 and output the converted DC voltage when the power frequency transformer 100 loses power.
In this embodiment, one or more DC-DC conversion circuits may be disposed in the first DC-DC conversion circuit 421 and the second DC-DC conversion circuit 422, and each DC-DC conversion circuit is configured to convert an input voltage into a stable supply voltage and output the stable supply voltage. Specifically, the first DC-DC conversion circuit 421 is configured to output a direct-current voltage output by the second end of the bidirectional AC-DC conversion circuit 410 or a direct-current voltage output by the standby power supply 500 after voltage conversion; the second DC-DC converting circuit 422 is configured to convert the DC voltage output by the second end of the bidirectional AC-DC converting circuit 410 or the DC voltage output by the standby power supply 500 and output the converted DC voltage. In an alternative embodiment, the first DC-DC conversion circuit 421 is configured to output only a 24V voltage value; the second DC-DC conversion circuit 422 is used to output stable four voltage values of +5V, + 15V, + 24. By the arrangement, the stability of the power supply voltage received by the subsequent circuit can be ensured.
Referring to fig. 1 to 2, in an embodiment of the present invention, the control device 200 includes a main control device 210 and an auxiliary control device 220; the power supply terminal of the main control device 210 is connected to the output terminal of the first DC-DC conversion circuit 421, and the power supply terminal of the auxiliary control device 220 is connected to the output terminal of the second DC-DC conversion circuit 422; the auxiliary control device is configured to control the operation of the band-type brake control circuit 300 and the bidirectional AC-DC conversion circuit 410 according to the received power supply control signal output by the main control device 210.
In this embodiment, the main control device 210 may be an elevator main control logic device, and the auxiliary control device may be an elevator power control device 220; the main control device 210 and the auxiliary control device 220 respectively take in the output voltages of the first DC-DC conversion circuit 421 and the second DC-DC conversion circuit 422 as the supply voltages. The main control device 210 is used for detecting the operation state of each device in the elevator in real time, and outputting a corresponding power supply control signal to the auxiliary control device 220 according to the detection result, so as to drive each device in the elevator to perform corresponding work by controlling the power supply voltage of each device in the elevator; the auxiliary control device 220 is used for controlling the power supply voltage of the intelligent power supply of the multifunctional elevator to be output to other devices in the elevator according to the power supply control signal output by the main control device 210. For example, when the main control device 210 determines that the industrial frequency transformer 100 is not powered off, the normal power supply control signal may be output to control the auxiliary control device 220, so that the bidirectional AC-DC conversion circuit 410 is in a rectification state to drive the elevator brake and control device 200 to work normally; when the main control device 210 determines that the power-frequency transformer 100 loses power, a rescue power supply control signal can be output according to a stored rescue program to control the auxiliary control device 220, so that the bidirectional AC-DC conversion circuit 410 is in an inversion state, and an elevator brake and the control device are driven to be in a rescue working state. By the arrangement, the rescue logic processing can be returned to the elevator main control logic device, the risk that an ARD rescue power supply, an electric brake release power supply and the elevator main control logic device compete for the main control right is fundamentally solved, and the safety and the reliability of the elevator rescue during work are greatly improved.
Referring to fig. 1 to 2, in an embodiment of the present invention, the multifunctional elevator intelligent power supply further includes:
a secondary rescue circuit 600, wherein the secondary rescue circuit 600 is connected between the backup power supply 500 and the system power supply circuit 400; the secondary rescue circuit 600 is used for controlling the standby power supply 500 to input a direct current power supply during secondary rescue according to the accessed key signal.
In this embodiment, the secondary rescue circuit 600 may be implemented by using a current limiting element and a switching device. After the ARD rescue or the electric brake release rescue is completed, the control device disconnects the access of the standby power supply 500, so that the elevator is in a power-off state to wait for maintenance. If the rescue needs to be carried out again, the secondary rescue circuit 600 can access the standby power supply 500 into the system power supply circuit 400 again according to the accessed key signal, so that the control device and the band-type brake control circuit 300 can recover power supply again, and the elevator can carry out the ARD rescue or the electric brake release rescue again.
In an alternative embodiment, the secondary rescue circuit 600 is constructed by using an N-MOS transistor K5, a manual contactor K7, a slow-start resistor R2, a relay K6 and a fuse F1. When the rescue personnel need to perform secondary rescue, the manual contactor K7 is manually closed, so that the standby power supply passes through the direct-current voltage output by the slow-start resistor R2; the slow-start resistor R2 is used for inhibiting the impact current just electrified at the moment; until the control device 200 operates normally, the control device 200 controls the relay K6 to pull in, so that the standby power supply 500 is normally connected to the direct current buses (PSB _ DC + and PSB _ DC-) for rescue power supply. The N-MOS transistor K5 is used for turning on/off according to a switch control signal output by the control device 200, and shares current flowing through a parasitic diode thereof when the N-MOS transistor K5 is turned on, so as to reduce switching loss of the N-MOS transistor K5 and reduce heat generation; and the fuse F1 can protect the battery in the event of a short circuit in the circuit. By arranging the secondary rescue circuit 600, incomplete rescue work during primary rescue can be timely compensated, and the completeness and flexibility of the rescue work can be improved.
Referring to fig. 1 to 2, in an embodiment of the present invention, the multifunctional elevator intelligent power supply further includes:
an emergency dc power supply circuit 700, wherein the emergency dc power supply circuit 700 is connected to the standby power supply 500; the emergency dc power supply circuit 700 is configured to output an emergency dc power supply under the control of the control device 200 when the power frequency transformer 100 loses power.
The multifunctional elevator intelligent power supply further comprises:
the emergency alternating current power supply circuit 800 is connected with the first coil of the power frequency transformer 100;
the power frequency transformer 100 is further configured to, when the power frequency transformer 100 loses power, output the ac power input by the fourth coil to the emergency ac power supply circuit 800 through the first coil after performing overvoltage conversion on the ac power input by the fourth coil; the emergency ac power supply circuit 800 is configured to output an emergency ac power under the control of the control device.
The emergency dc power supply circuit 700 may be implemented by a combined circuit constructed by a switching device, a unidirectional conducting element and a current limiting element, wherein the switching device may be implemented by one or more combinations of a contactor or a relay, and the emergency dc power supply circuit 700 is configured to output the dc voltage output by the standby power supply 500 to an elevator by using a dc power supply device under the control of the control device 200 when the power frequency transformer 100 loses power, so that the emergency dc power supply circuit can continue to operate during rescue. In an alternative embodiment, the emergency dc power supply circuit 700 is constructed by three contactors (K8, K9, K10), two diodes (D1, D2), a current limiting resistor R3 and a fuse F2. In the rescue mode, the control device 200 firstly controls the contactor K8 and the contactor K9 to be closed, and the emergency direct current power supply circuit 700 outputs an emergency direct current power supply to a subsequent device through the current limiting resistor R3 for pre-charging; the relay in the subsequent circuit can be prevented from being adhered, and the current limiting resistor R3 is used for inhibiting power-on impact current; when the control device 200 detects that the pre-charging of the subsequent device is completed, the contactor K10 is controlled to be closed so as to normally supply power to the subsequent device; the diode D1 and the diode D2 are used for preventing voltage backflow caused by voltage rise in a subsequent device; the fuse F2 is used to prevent battery failure due to subsequent device shorts.
The emergency ac power supply circuit 800 may be implemented by one or more combinations of a contactor and a relay, and when the power frequency transformer 100 loses power, the first coil may generate a corresponding induced voltage according to a turn ratio of the first coil to the fourth coil, where the induced voltage has a value equal to a value of an ac power source input before losing power. The first coil, under the control of the control means 200, can output this voltage to the means of the elevator with ac supply so that it can continue to operate during the rescue. In an alternative embodiment, the emergency ac power supply circuit 800 is implemented by using a relay K11, and the relay K11 is configured to be turned on when the control device 200 detects that the industrial frequency transformer 100 is out of power, and output the emergency ac power to the elevator door motor and the light curtain device to supply power to the elevator door motor and the light curtain device when the emergency ac power is turned on. Through setting up emergent direct current supply circuit 700 and emergent alternating current supply circuit 800, can make other devices that adopt the direct current or adopt the alternating current to supply power in the elevator can continue normal work during the rescue, be favorable to improving the success rate of elevator rescue.
Referring to fig. 1 to 2, in an embodiment of the present invention, the multifunctional elevator intelligent power supply further includes:
the LC filter circuit 900 is connected between the power frequency transformer 100 and the first end of the bidirectional AC-DC conversion circuit 410, and the LC filter circuit 900 is configured to filter the AC power output by the fourth coil of the power frequency transformer 100 and output the filtered AC power to the bidirectional AC-DC conversion circuit 410; the LC filter circuit 900 is further configured to filter and output the AC power supply inverted and output by the bidirectional AC-DC conversion circuit 410 to the power frequency transformer 100 when the power frequency transformer 100 loses power;
a bus capacitor pre-charging circuit 1000 connected between the bidirectional AC-DC conversion circuit 410 and the DC-DC conversion circuit 420; the bus capacitor pre-charging circuit 1000 is configured to pre-charge the dc bus capacitor under the control of the control device 200 at an initial power-on stage of the multifunctional elevator smart power supply.
In this embodiment, the LC filter circuit 900 may be implemented by a filter circuit constructed by an inductor L1 and a capacitor C1, and the number of components thereof is determined according to actual needs, which is not limited herein. The LC filter circuit 900 is configured to filter an output alternating current of the fourth coil of the power frequency transformer 100 and output the filtered output alternating current when the LC filter circuit works normally; when the power frequency transformer 100 loses power, the alternating current output by the bidirectional AC-DC conversion circuit 410 is filtered and output, so as to filter the frequency of the interference band in the input voltage.
The bus capacitor pre-charging circuit 1000 may be implemented by a pre-charging circuit constructed by a bus capacitor, a resistance element and a switching device, wherein the switching device may be implemented by one or more of a contactor and a relay. In one embodiment, the bus capacitor precharge circuit 1000 is implemented by using a current-limiting resistor R1, a relay K4, and a bus capacitor C2; the bus capacitor C2 is connected between the positive direct-current bus PSB _ DC + and the negative direct-current bus PSB _ DC-; in the initial stage of electrification of the elevator, the pre-charging current pre-charges the bus capacitor C2 through the current-limiting resistor R1; after the pre-charging is finished, the control device 200 controls the relay K4 to close, and the pre-charging current can be obtained by converting the grid alternating current into a specific voltage.
The invention also provides an elevator, which comprises a frequency converter and the multifunctional elevator intelligent power supply, wherein the frequency converter is connected with the emergency direct current power supply circuit 800. In this embodiment, the frequency converter is used for taking the emergency direct-current power supply which is accessed again as a power supply after power failure so as to continue working.
The detailed structure of the intelligent power supply of the multifunctional elevator can refer to the embodiment and is not described herein; it can be understood that, because the above-mentioned multifunctional elevator intelligent power supply is used in the elevator, the embodiment of the elevator includes all technical solutions of all embodiments of the above-mentioned multifunctional elevator intelligent power supply, and the achieved technical effects are also completely the same, and are not described herein again.
The invention also provides a conversion method of the multifunctional elevator intelligent power supply, which is based on the multifunctional elevator intelligent power supply; or, based on an elevator as described above;
the embodiment of the conversion method of the intelligent power supply of the multifunctional elevator comprises all technical schemes of all the embodiments of the intelligent power supply of the multifunctional elevator or the elevator, the achieved technical effects are completely the same, and the details are not repeated herein.
Referring to fig. 3, in an embodiment of the present invention, the method for converting the intelligent power supply of the multifunctional elevator includes the following steps:
step S100, when the power frequency transformer is powered on, the power frequency transformer respectively outputs two paths of alternating current power supplies, wherein one path of alternating current power supply is output to the band-type brake control circuit, and the other path of alternating current power supply is converted into a direct current power supply through the system power supply circuit and then respectively outputs the control device and the standby power supply;
in this embodiment, when power frequency transformer normally got electricity, elevator normal operating promptly, energy can be followed power frequency transformer's once side, for example: the commercial power grid flows to the load connected with the secondary side of the commercial power grid through the industrial frequency transformer. In practical application, the load connected to the secondary side of the power frequency transformer includes, but is not limited to, a band-type brake control circuit and a system power supply circuit, and may also include other functional units using ac power supply. The system power supply circuit is used for carrying out power supply conversion on the received alternating current power supply so as to enable the energy to be converted into a direct current power form and then respectively output to the control device and the standby power supply, and the direct current power supply output to the control device is used for supplying power for normal work of the control device, so that the control device can monitor the whole working condition of the elevator; and the direct current power supply output to the standby power supply is used for charging the standby power supply in real time so as to keep the electric quantity of the standby power supply in a full-charge state all the time.
Step S200, when the power frequency transformer loses power, the standby power supply outputs a direct current power supply, the direct current power supply is converted into at least one path of alternating current power supply and/or at least one path of direct current power supply through the system power supply circuit, the alternating current power supply is output to the band-type brake control circuit through the power frequency transformer, and the direct current power supply is output to the control device;
in the embodiment, when the power frequency transformer loses power, the standby power supply can be automatically connected to the system power supply circuit, the standby power supply outputs direct current electric energy stored when the elevator works normally, the direct current power supply can be converted into at least one path of alternating current power supply and/or at least one path of direct current power supply through the system power supply circuit, and the direct current power supply can directly output the control device so as to ensure that the control device adopts different alternating current power supplies to supply power to various control units normally; the alternating current power supply can be reversely output to the band-type brake control circuit through the power frequency transformer, so that various functional modules which adopt different alternating current power supplies for power supply in the band-type brake control circuit can provide power supply voltage for the elevator band-type brake under the control of the control device, and further the ARD rescue mode or the brake release rescue mode of the elevator can be realized.
Referring to fig. 4, in an embodiment of the present invention, when the industrial frequency transformer loses power, the standby power supply outputs a dc power supply, and the dc power supply is converted into at least one ac power supply and/or at least one dc power supply by the system power supply circuit, the ac power supply is output to the band-type brake control circuit by the industrial frequency transformer, and after step S200 of outputting the dc power supply to the control device, the method for converting an intelligent power supply of a multifunctional elevator further includes:
step S300, the standby power supply is also used for outputting at least one path of alternating current power supply to the band-type brake control circuit through the system power supply circuit when the secondary rescue circuit receives the key signal; and/or at least one direct current power supply is connected to the control device.
In this embodiment, after the power frequency transformer loses power, the ARD rescue mode or the brake release rescue mode performed by the control device may be a first rescue, and the second rescue is a second performed ARD rescue mode or a brake release rescue mode after the first rescue. When the secondary rescue circuit receives a key signal representing the start of secondary rescue, the standby power supply is connected to the system power supply circuit again, so that rescue workers can timely make up for incomplete rescue work during primary rescue, and the energy flow direction and conversion after the standby power supply is connected again can be consistent with the step 200, and further description is omitted.
Referring to fig. 5, in an embodiment of the present invention, in step S100, when the power frequency transformer is powered on, the power frequency transformer respectively outputs two paths of ac power supplies, where one path of ac power supply is output to the band-type brake control circuit, and the other path of ac power supply is converted into a dc power supply by the system power supply circuit and then respectively outputs the control device power supply and the standby power supply, includes:
step S110, when the power frequency transformer is powered on, the power frequency transformer respectively outputs two paths of alternating current power supplies;
step S120, outputting one path of alternating current power supply to the band-type brake control circuit; the other path of alternating current power supply is output to a bidirectional AC-DC conversion circuit in the system power supply circuit;
step S130, after the other path of alternating current power supply is converted by the bidirectional AC-DC conversion circuit, two paths of direct current power supplies are correspondingly output, wherein one path of direct current power supply is output to the standby power supply, and the other path of direct current power supply is output to the control device through the DC-DC conversion circuit;
further, the other direct current power supply is output to the control device through the DC-DC conversion circuit, specifically:
and the other path of direct current power supply is output to the main control device and the auxiliary control device through the first DC-DC conversion circuit and the second DC-DC conversion circuit respectively.
In this embodiment, the power frequency transformer is configured to convert the power of the AC power supply of the utility grid and output the converted power to the brake control circuit and the bidirectional AC-DC conversion circuit, so that the brake control circuit can drive the elevator brake to normally operate under the control of the control device when the elevator normally operates, thereby implementing the elevator stop function; the other path of alternating current power supply is converted into direct current power supply through the bidirectional AC-DC conversion circuit, and one path of direct current power supply is directly output to the standby power supply to charge the standby power supply; and the other path of the direct current power supply is correspondingly output to the first DC-DC conversion circuit and the second DC-DC conversion circuit after being subjected to corresponding direct current power supply conversion through the first DC-DC conversion circuit and the second DC-DC conversion circuit respectively, so as to provide the required working voltages for the main control device and the auxiliary control device respectively. By the arrangement, the harmony of the contracting brake power supply and the main system power supply in normal working is at least improved.
Referring to fig. 6, in an embodiment of the present invention, when the power frequency transformer loses power, the step S200 of outputting a dc power from the standby power supply to the band-type brake control circuit through the power frequency transformer includes:
step S210, when the power frequency transformer loses power, the standby power supply outputs a direct current power supply;
step S220, the direct current power supply is converted into at least one path of alternating current power supply through the bidirectional AC-DC conversion circuit, and the alternating current power supply is output to the band-type brake control circuit through the power frequency transformer;
and/or the alternating current power supply is converted into at least one path of direct current power supply through the DC-DC conversion circuit, and the direct current power supply is output to the control device.
In this embodiment, when the power frequency transformer loses power, the dc power stored in the standby power supply is automatically output to the system power supply circuit. It can be understood that, because the bidirectional AC-DC conversion circuit only realizes the bidirectional conversion function under the control of the control device, the direct current power supply output by the standby power supply needs to provide a power supply for the main control device and the auxiliary control device in the control device, and then the control device controls the bidirectional AC-DC conversion circuit to convert the other path of direct current electric energy into alternating current electric energy and output the alternating current electric energy to the band-type brake control circuit through the power frequency transformer.
Referring to fig. 7, in an embodiment of the present invention, after the step S210 of outputting a dc power from the standby power supply, the method for converting an intelligent power supply of a multifunctional elevator further includes:
step S230, the direct current power supply is further used as an emergency direct current power supply to be output through the emergency direct current power supply circuit;
the step that the direct current power supply is converted into at least one path of alternating current power supply through the bidirectional AC-DC conversion circuit, and the alternating current power supply is output to the band-type brake control circuit through the power frequency transformer further comprises the following steps:
the power frequency transformer also outputs one path of alternating current power supply, and the path of alternating current power supply passes through the emergency alternating current power supply circuit to be output as an emergency direct current power supply.
In this embodiment, the standby power supply can also be divided into another direct current power supply which is directly output to the elevator through the emergency direct current power supply circuit and adopts direct current power supply functional units, such as the lighting unit and the communication unit, so that the corresponding functional units can still normally work when the power grid loses power, and the elevator rescue work is facilitated. In practical operation, step S230 only needs to occur after step 210, and may also occur simultaneously with step S220. Besides the alternating current power supply output to the band-type brake control circuit, the power frequency transformer can also output one path of alternating current power supply to carry out emergency power supply for the functional unit adopting alternating current power supply in the elevator, the setting reason is the same as that of the emergency direct current power supply, and the description is omitted. It can be understood that, at this time, the ac power sources (number and size) output by the line frequency transformer are determined according to the functional units (ac power supply type) required for elevator rescue, and are not limited herein.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (16)

1. A multifunctional elevator intelligent power supply, characterized in that, the multifunctional elevator intelligent power supply includes:
the power frequency transformer is used for accessing an alternating current power supply, and outputting the accessed alternating current power supply after voltage conversion;
a control device;
the brake control circuit is used for receiving the alternating current power supply output by the power frequency transformer and controlling the elevator brake to work under the control of the control device;
the system power supply circuit is used for converting an alternating current power supply output by the power frequency transformer into a direct current power supply under the control of the control device and supplying power to the control device; and
and the standby power supply is used for being connected into the system power supply circuit, outputting a direct current power supply when the power frequency transformer loses power, correspondingly outputting at least one path of alternating current power supply and/or at least one path of direct current power supply after inversion conversion and voltage conversion of the system power supply circuit respectively, outputting the alternating current power supply to the band-type brake control circuit through the power frequency transformer, and outputting the direct current power supply to supply power to the control device.
2. The multi-functional elevator smart power supply of claim 1, wherein said system power supply circuit comprises:
a bidirectional AC-DC conversion circuit having a first terminal and a second terminal, the first terminal of the bidirectional AC-DC conversion circuit being connected to the industrial frequency transformer; the bidirectional AC-DC conversion circuit is used for converting the alternating current power supply output by the power frequency transformer into a direct current power supply and then outputting the direct current power supply; and
the input end of the DC-DC conversion circuit is connected with the second end of the bidirectional AC-DC conversion circuit, and the output end of the DC-DC conversion circuit is connected with the control device; the DC-DC conversion circuit is used for converting the voltage of the direct current power supply output by the bidirectional AC-DC conversion circuit and outputting the converted direct current power supply to the control device;
the standby power supply is connected with the common connecting end of the bidirectional AC-DC conversion circuit and the DC-DC conversion circuit; when the power frequency transformer loses power, the standby power supply correspondingly outputs one path of alternating current power supply and one path of direct current power supply through the bidirectional AC-DC conversion circuit and the DC-DC conversion circuit respectively;
the direct current power supply output by the standby power supply is divided into two paths, wherein one path of direct current power supply is inverted into an alternating current power supply through the bidirectional AC-DC conversion circuit and is output to the band-type brake control circuit through the power frequency transformer; and the other path of the direct current is converted by direct current voltage and then output to supply power for the control device.
3. The multi-functional elevator intelligent power supply of claim 2, characterized in that, the power frequency transformer includes: a first coil, a second coil, a third coil and a fourth coil; the first coil is used for being connected with the alternating current power supply; the second coil and the third coil are connected with the contracting brake control circuit and used for outputting the alternating current power supply accessed by the first coil to the contracting brake control circuit through the second coil and the third coil after corresponding voltage conversion; the fourth coil is connected with the system power supply circuit and used for outputting an alternating current power supply accessed by the first coil to the system power supply circuit after corresponding voltage conversion;
and the power frequency transformer is also used for converting the voltage of the alternating current power supply accessed by the fourth coil and outputting the converted voltage to the band-type brake control circuit through the third coil and the fourth coil when the power frequency transformer loses power.
4. The multi-functional elevator smart power supply of claim 2, wherein said DC-DC conversion circuit comprises: a first DC-DC conversion circuit and a second DC-DC conversion circuit;
the first DC-DC conversion circuit is connected with the second end of the bidirectional AC-DC conversion circuit, and the first DC-DC conversion circuit is used for performing corresponding voltage conversion on a direct current power supply output by the second end of the bidirectional AC-DC conversion circuit and outputting the converted direct current power supply; the first DC-DC conversion circuit is also used for converting the direct current power supply output by the standby power supply into direct current voltage and outputting the direct current voltage when the power frequency transformer is in power failure;
the second DC-DC conversion circuit is connected with the common end of the first DC-DC conversion circuit and the bidirectional AC-DC conversion circuit; the second DC-DC conversion circuit is used for performing corresponding voltage conversion on the direct-current power supply output by the second end of the bidirectional AC-DC conversion circuit and then outputting the direct-current power supply; and the second DC-DC conversion circuit is also used for converting the direct-current power supply output by the standby power supply into direct-current voltage and outputting the direct-current voltage when the power frequency transformer loses power.
5. The multi-functional elevator smart power supply of claim 2, wherein said control means comprises a primary control means and a secondary control means; the power supply end of the main control device is connected with the output end of the first DC-DC conversion circuit, and the power supply end of the auxiliary control device is connected with the output end of the second DC-DC conversion circuit; the auxiliary control device is used for controlling the band-type brake control circuit and the bidirectional AC-DC conversion circuit to work according to the received power supply control signal output by the main control device.
6. The multi-functional elevator intelligent power supply of claim 1, further comprising:
the secondary rescue circuit is connected between the standby power supply and the system power supply circuit; the secondary rescue circuit is used for controlling the standby power supply to input a direct current power supply during secondary rescue according to the accessed key signal.
7. The multi-functional elevator intelligent power supply of claim 1, further comprising:
the emergency direct current power supply circuit is connected with the standby power supply; and the emergency direct current power supply circuit is used for outputting an emergency direct current power supply under the control of the control device when the power frequency transformer loses power.
8. The multifunctional elevator intelligent power supply of claim 3, further comprising:
the emergency alternating current power supply circuit is connected with the first coil of the power frequency transformer;
the power frequency transformer is also used for outputting an alternating current power supply input by the fourth coil to an emergency alternating current power supply circuit through the first coil after overvoltage conversion when the power frequency transformer is in power failure; the emergency alternating current power supply circuit is used for outputting an emergency alternating current power supply under the control of the control device.
9. The multifunctional elevator intelligent power supply of any one of claims 1 to 8, further comprising:
the LC filter circuit is connected between the power frequency transformer and the first end of the bidirectional AC-DC conversion circuit, and is used for filtering an alternating current power supply output by the fourth coil of the power frequency transformer and outputting the filtered alternating current power supply to the bidirectional AC-DC conversion circuit; the LC filter circuit is also used for filtering and outputting the alternating current power supply which is output by the bidirectional AC-DC conversion circuit in an inversion manner to the power frequency transformer when the power frequency transformer loses power;
the bus capacitor pre-charging circuit is connected between the bidirectional AC-DC conversion circuit and the DC-DC conversion circuit; the bus capacitor pre-charging circuit is used for pre-charging the direct current bus capacitor under the control of the control device at the power-on initial stage of the multifunctional elevator intelligent power supply.
10. An elevator, characterized in that the elevator comprises a frequency converter and a multifunctional elevator intelligent power supply according to any one of claims 1-9;
and the frequency converter is connected with the emergency direct current power supply circuit.
11. A method for converting a multifunctional elevator intelligent power supply, which is based on the multifunctional elevator intelligent power supply of any one of claims 1-9; or, based on the elevator of claim 10;
the method for converting the intelligent power supply of the multifunctional elevator is characterized by comprising the following steps of:
when the power frequency transformer is powered on, the power frequency transformer respectively outputs two paths of alternating current power supplies, wherein one path of alternating current power supply is output to the band-type brake control circuit, and the other path of alternating current power supply is converted into a direct current power supply through the system power supply circuit and then respectively outputs the control device and the standby power supply;
when the power frequency transformer loses power, the standby power supply outputs a direct current power supply, the direct current power supply is converted into at least one path of alternating current power supply and/or at least one path of direct current power supply through the system power supply circuit, the alternating current power supply is output to the band-type brake control circuit through the power frequency transformer, and the direct current power supply is output to the control device.
12. The method for converting the intelligent power supply of the multifunctional elevator as claimed in claim 11, wherein when the power frequency transformer is powered on, the power frequency transformer respectively outputs two paths of ac power supplies, wherein one path of ac power supply is output to the brake control circuit, and the other path of ac power supply is converted into a dc power supply by the system power supply circuit and then respectively outputs the power supply of the control device and the standby power supply, and the method comprises the following steps:
when the power frequency transformer is powered on, the power frequency transformer respectively outputs two paths of alternating current power supplies;
one path of alternating current power supply is output to the band-type brake control circuit; the other path of alternating current power supply is output to a bidirectional AC-DC conversion circuit in the system power supply circuit;
and the other path of alternating current power supply is converted by the bidirectional AC-DC conversion circuit and then correspondingly outputs two paths of direct current power supplies, wherein one path of direct current power supply is output to the standby power supply, and the other path of direct current power supply is output to the control device through the DC-DC conversion circuit.
13. The method for converting the intelligent power supply of the multifunctional elevator as claimed in claim 12, wherein the other direct current power supply is output to the control device through the DC-DC conversion circuit, specifically:
and the other path of direct current power supply is output to the main control device and the auxiliary control device through the first DC-DC conversion circuit and the second DC-DC conversion circuit respectively.
14. The method for converting an intelligent power supply of a multifunctional elevator according to claim 11, wherein when the power frequency transformer loses power, the standby power supply outputs a dc power supply, and is converted into at least one ac power supply and/or at least one dc power supply through the system power supply circuit, the ac power supply is output to the band-type brake control circuit through the power frequency transformer, and the dc power supply is output to the control device, the method comprising:
when the power frequency transformer loses power, the standby power supply outputs a direct current power supply;
the direct current power supply is converted into at least one path of alternating current power supply through the bidirectional AC-DC conversion circuit, and the alternating current power supply is output to the band-type brake control circuit through the power frequency transformer;
and/or the alternating current power supply is converted into at least one path of direct current power supply through the DC-DC conversion circuit, and the direct current power supply is output to the control device.
15. The method for converting a multi-functional intelligent power supply for an elevator according to claim 14, wherein after the step of outputting a dc power from the backup power supply, the method for converting a multi-functional intelligent power supply for an elevator further comprises:
the direct current power supply is also used as an emergency direct current power supply to be output through the emergency direct current power supply circuit;
the step that the direct current power supply is converted into at least one path of alternating current power supply through the bidirectional AC-DC conversion circuit, and the alternating current power supply is output to the band-type brake control circuit through the power frequency transformer further comprises the following steps:
the power frequency transformer also outputs at least one path of alternating current power supply, and the path of alternating current power supply passes through the emergency alternating current power supply circuit to be used as an emergency direct current power supply to be output.
16. The method for converting an intelligent power supply of a multi-functional elevator according to claim 11, wherein when the power frequency transformer loses power, the standby power supply outputs a dc power supply and is converted into at least one ac power supply and/or at least one dc power supply by the system power supply circuit, the ac power supply is output to the band-type brake control circuit by the power frequency transformer, and after the step of outputting the dc power supply to the control device, the method for converting an intelligent power supply of a multi-functional elevator further comprises:
the standby power supply is also used for outputting at least one path of alternating current power supply to the band-type brake control circuit through the system power supply circuit when the secondary rescue circuit receives the key signal; and/or at least one direct current power supply is connected to the control device.
CN202011461687.0A 2020-12-10 2020-12-10 Elevator, multifunctional elevator intelligent power supply and conversion method thereof Pending CN112615550A (en)

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PCT/CN2021/117895 WO2022121416A1 (en) 2020-12-10 2021-09-13 Elevator, and multi-functional intelligent elevator power source and conversion method therefor

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WO2022121416A1 (en) * 2020-12-10 2022-06-16 苏州汇川技术有限公司 Elevator, and multi-functional intelligent elevator power source and conversion method therefor

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CN201737550U (en) * 2010-08-04 2011-02-09 长沙理工大学 Elevator energy feedback, reactive compensation and outage emergency operation system
US9601945B2 (en) * 2013-01-29 2017-03-21 Reynolds & Reynolds Electronics, Inc. Emergency back-up power system for traction elevators
CN204847639U (en) * 2015-06-24 2015-12-09 北京索德电气工业有限公司 Low -cost elevator control system power scheme
CN108988477A (en) * 2018-07-25 2018-12-11 广东寰宇电子科技股份有限公司 The method and device and elevator that emergency power supply unit is powered under energy-feedback elevator
CN112615550A (en) * 2020-12-10 2021-04-06 苏州汇川技术有限公司 Elevator, multifunctional elevator intelligent power supply and conversion method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022121416A1 (en) * 2020-12-10 2022-06-16 苏州汇川技术有限公司 Elevator, and multi-functional intelligent elevator power source and conversion method therefor

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