CN114229659B - Elevator control method, elevator control device, elevator and computer readable storage medium - Google Patents
Elevator control method, elevator control device, elevator and computer readable storage medium Download PDFInfo
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- CN114229659B CN114229659B CN202111593659.9A CN202111593659A CN114229659B CN 114229659 B CN114229659 B CN 114229659B CN 202111593659 A CN202111593659 A CN 202111593659A CN 114229659 B CN114229659 B CN 114229659B
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- 238000000034 method Methods 0.000 title claims abstract description 48
- 238000007789 sealing Methods 0.000 claims abstract description 52
- 238000001514 detection method Methods 0.000 claims abstract description 42
- 239000003990 capacitor Substances 0.000 claims abstract description 40
- 230000001360 synchronised effect Effects 0.000 claims abstract description 22
- 238000005070 sampling Methods 0.000 claims description 17
- 238000007599 discharging Methods 0.000 claims description 5
- 230000001276 controlling effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
- B66B13/02—Door or gate operation
- B66B13/14—Control systems or devices
- B66B13/143—Control systems or devices electrical
- B66B13/146—Control systems or devices electrical method or algorithm for controlling doors
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- 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
- Y02B50/00—Energy efficient technologies in elevators, escalators and moving walkways, e.g. energy saving or recuperation technologies
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- Automation & Control Theory (AREA)
- Elevator Control (AREA)
Abstract
The application discloses an elevator control method, an elevator control device, an elevator and a computer readable storage medium, wherein the elevator control method comprises the following steps: when the power failure detection unit detects that the elevator is powered off, the main controller controls the capacitor to discharge so as to drive the power inversion unit to control the elevator door to be closed in a first closing stage after the elevator is powered off; acquiring a bus voltage value detected by the bus voltage detection circuit; and when the bus voltage value is smaller than a first voltage threshold value, starting the star-sealing relay to short-circuit the permanent magnet synchronous motor at a second closing stage after the elevator is powered off so as to control the elevator door to be closed. The application can improve the service life of the star-sealing relay.
Description
Technical Field
The application relates to the technical field of elevators, in particular to an elevator control method, an elevator control device, an elevator and a computer readable storage medium.
Background
With the rapid development of modern cities, elevator application is comprehensively promoted, and the requirements on reliability are high due to the specificity of application scenes. In some special cases, for example, when the power is off, an elevator control system fails, an elevator door is rapidly closed under the action of factors such as inertia due to the loss of electronic driving force, door closing and clamping accidents are easy to occur, and potential safety hazards exist.
The door opening and closing control of the elevator is realized by driving a permanent magnet synchronous motor to rotate by a door machine frequency converter, the permanent magnet synchronous motor can generate counter electromotive force with certain voltage on a power line in the rotating process, and the power line of the permanent magnet synchronous motor is short-circuited at the moment to generate a larger braking effect. By utilizing the principle, the elevator can obtain a certain braking force in the power-off and door-closing process by means of shorting the permanent magnet synchronous motor through the star-sealing relay, so that the injury to elevator passengers in the rapid door-closing process is avoided. However, when the permanent magnet synchronous motor operates at a higher rotation speed, the back electromotive force voltage on the motor power line is high, and the star sealing relay is used for shorting the motor power line, so that a larger impact current can be generated due to the fact that the voltage at two ends of the power line is high and the internal resistance of the motor is smaller. The impact current directly affects the service life of the star-sealed relay, and the star-sealed relay is directly damaged under severe conditions.
Disclosure of Invention
The application mainly aims to provide an elevator control method, an elevator control device, an elevator and a computer readable storage medium, and aims to improve the service life of a star-sealing relay.
To achieve the above object, the present application provides an elevator control method, the elevator including a power failure detection unit for detecting whether the elevator is powered off, a capacitor for discharging to the outside, a bus voltage detection circuit for detecting a voltage, the elevator control method comprising:
when the power failure detection unit detects that the elevator is powered off, the main controller controls the capacitor to discharge, and the driving power inversion unit controls the elevator door to be closed in a first closing stage after the elevator is powered off;
acquiring a bus voltage value detected by the bus voltage detection circuit;
and when the bus voltage value is smaller than a first voltage threshold value, starting the star-sealing relay to short-circuit the permanent magnet synchronous motor at a second closing stage after the elevator is powered off so as to control the elevator door to be closed.
Optionally, after the step of controlling the elevator door to close in the first closing stage after the elevator is powered off, the driving power inverter unit includes:
acquiring a current value acquired by the current sampling circuit and a bus voltage value detected by the bus voltage detection circuit;
and determining whether to adjust the output power of the power inversion unit according to the current value and/or the bus voltage value.
Optionally, the step of determining whether to adjust the output power of the power inverter unit according to the current value and/or the bus voltage value includes:
when the current value is greater than or equal to a current threshold value, determining to adjust the output power of the power inverter unit; and/or the number of the groups of groups,
and when the bus voltage value is greater than or equal to the second voltage threshold value, determining to adjust the output power of the power inversion unit, wherein the second voltage threshold value is greater than the first voltage threshold value.
Optionally, after the step of obtaining the current value collected by the current sampling circuit and the bus voltage value collected by the bus voltage detection power, the method further includes:
and when the bus voltage value is smaller than the second voltage threshold value and larger than or equal to the first voltage threshold value, determining to drive the power inverter unit to control the elevator door to be closed.
Optionally, the step of determining to adjust the output power of the power inverter unit includes:
and adjusting the duty ratio of the power inversion unit to adjust the output power of the power inversion unit.
Optionally, the step of adjusting the duty cycle of the power inverter unit includes:
adjusting the action time of a switching tube of the power inversion unit to adjust the duty ratio of the power inversion unit; and/or the number of the groups of groups,
and adjusting the cross action of the switching tube of the power inversion unit to adjust the duty ratio of the power inversion unit.
Optionally, when the power failure detection unit detects that the elevator is powered off, the main controller controls the capacitor to discharge, and before the step of controlling the elevator door to close in the first closing stage after the elevator is powered off, the driving power inversion unit includes:
detecting the electric quantity of the capacitor when the elevator normally operates;
and when the electric quantity of the capacitor is smaller than the preset electric quantity, charging the capacitor.
In addition, in order to achieve the above object, the present application also provides an elevator control apparatus comprising:
the control unit is used for controlling the capacitor to discharge when the power failure detection unit detects that the elevator is powered off, and driving the power inversion unit to control the elevator door to be closed in a first closing stage after the elevator is powered off;
the acquisition unit is used for acquiring the bus voltage value detected by the bus voltage detection circuit;
and the starting unit is used for starting the star-sealing relay to short the permanent magnet synchronous motor to control the elevator door to be closed in a second closing stage after the elevator is powered off when the bus voltage value is smaller than the first voltage threshold value.
In addition, in order to achieve the above object, the present application provides an elevator comprising a memory, a processor and an elevator control program stored on the memory and executable on the processor, which elevator control program, when executed by the processor, implements the steps of the elevator control method as set forth in any one of the above.
In addition, in order to achieve the above object, the present application also provides a computer-readable storage medium having stored thereon an elevator control program which, when executed by a processor, implements the steps of the elevator control method according to any one of the above.
In the embodiment, when the main controller detects that the elevator is powered off through the power-off detection unit, the power inversion unit is used for shorting a power line of the motor to generate braking force, so that the elevator door is prevented from being closed rapidly in a first closing stage, and people are prevented from being injured by clamping; and when the voltage of the capacitor discharging outwards reaches a first voltage threshold, starting the star-sealing relay, and shorting a motor power line through the star-sealing relay to generate braking force, so that the elevator door is prevented from being closed rapidly in a second closing stage. Therefore, the situation that the star sealing relay is directly adopted to seal the star by hardware under the condition that the voltage output by the capacitor is higher is avoided, the service life of the star sealing relay is lost, the closing speed of the elevator door is controlled under the condition that the elevator is powered off, and the service life of the star sealing relay is prolonged.
Drawings
Fig. 1 is a schematic diagram of a hardware architecture of an elevator control device according to an embodiment of the present application;
fig. 2 presents a flow diagram of a first embodiment of the elevator control method of the application;
fig. 3 is a schematic circuit block diagram of the elevator control method of the present application;
fig. 4 is a flow chart of the elevator control method of the present application for determining the output power of the regulated power inverter unit;
fig. 5 is a flow chart of a fourth embodiment of the elevator control method of the application;
fig. 6 is a schematic block diagram of an elevator control apparatus according to an embodiment of the present application.
The achievement of the objects, functional features and advantages of the present application will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
The main solutions of the embodiments of the present application are: when the power failure detection unit detects that the elevator is powered off, the main controller controls the capacitor to discharge, and the driving power inversion unit controls the elevator door to be closed in a first closing stage after the elevator is powered off; acquiring a bus voltage value detected by the bus voltage detection circuit; and when the bus voltage value is smaller than a first voltage threshold value, starting the star-sealing relay to short-circuit the permanent magnet synchronous motor at a second closing stage after the elevator is powered off so as to control the elevator door to be closed.
As an implementation, referring to fig. 1, fig. 1 is a schematic diagram of a hardware architecture of an elevator control device according to an embodiment of the present application, and as shown in fig. 1, the elevator control device may include a processor 101, such as a CPU, a memory 102, and a communication bus 103. Wherein the communication bus 103 is used to enable connected communication among the components.
The memory 102 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. As shown in fig. 1, an elevator control program may be included in a memory 102 as a computer-readable storage medium; and the processor 101 may be configured to call the elevator control program stored in the memory 102 and perform the following operations:
when the power failure detection unit detects that the elevator is powered off, the main controller controls the capacitor to discharge, and the driving power inversion unit controls the elevator door to be closed in a first closing stage after the elevator is powered off;
acquiring a bus voltage value detected by the bus voltage detection circuit;
and when the bus voltage value is smaller than a first voltage threshold value, starting the star-sealing relay to short-circuit the permanent magnet synchronous motor at a second closing stage after the elevator is powered off so as to control the elevator door to be closed.
In one embodiment, the processor 101 may be configured to call an elevator control program stored in the memory 102 and perform the following operations:
acquiring a current value acquired by the current sampling circuit and a bus voltage value detected by the bus voltage detection circuit;
and determining whether to adjust the output power of the power inversion unit according to the current value and/or the bus voltage value.
In one embodiment, the processor 101 may be configured to call an elevator control program stored in the memory 102 and perform the following operations:
when the current value is greater than or equal to a current threshold value, determining to adjust the output power of the power inverter unit; and/or the number of the groups of groups,
and when the bus voltage value is greater than or equal to the second voltage threshold value, determining to adjust the output power of the power inversion unit, wherein the second voltage threshold value is greater than the first voltage threshold value.
In one embodiment, the processor 101 may be configured to call an elevator control program stored in the memory 102 and perform the following operations:
and when the bus voltage value is smaller than the second voltage threshold value and larger than or equal to the first voltage threshold value, determining to drive the power inverter unit to control the elevator door to be closed.
In one embodiment, the processor 101 may be configured to call an elevator control program stored in the memory 102 and perform the following operations:
and adjusting the duty ratio of the power inversion unit to adjust the output power of the power inversion unit.
In one embodiment, the processor 101 may be configured to call an elevator control program stored in the memory 102 and perform the following operations:
adjusting the action time of a switching tube of the power inversion unit to adjust the duty ratio of the power inversion unit; and/or the number of the groups of groups,
and adjusting the cross action of the switching tube of the power inversion unit to adjust the duty ratio of the power inversion unit.
In one embodiment, the processor 101 may be configured to call an elevator control program stored in the memory 102 and perform the following operations:
detecting the electric quantity of the capacitor when the elevator normally operates;
and when the electric quantity of the capacitor is smaller than the preset electric quantity, charging the capacitor.
The door opening and closing control of the elevator is realized by driving a permanent magnet synchronous motor to rotate by a door machine frequency converter, the permanent magnet synchronous motor can generate counter electromotive force with certain voltage on a power line in the rotating process, and the power line of the permanent magnet synchronous motor is short-circuited at the moment to generate a larger braking effect. By utilizing the principle, the elevator can obtain a certain braking force in the power-off and door-closing process by means of shorting the permanent magnet synchronous motor through the star-sealing relay, so that the injury to elevator passengers in the rapid door-closing process is avoided. However, when the permanent magnet synchronous motor operates at a higher rotation speed, the back electromotive force voltage on the motor power line is high, and the star sealing relay is used for shorting the motor power line, so that a larger impact current can be generated due to the fact that the voltage at two ends of the power line is high and the internal resistance of the motor is smaller. The impact current directly affects the service life of the star-sealed relay, and the star-sealed relay is directly damaged under severe conditions.
Referring to fig. 3, fig. 3 is a schematic diagram of a circuit unit of the elevator control method of the present application. The elevator comprises: the power failure detection unit 1, the capacitor 2, the bus voltage detection circuit 3, the power inverter unit 4, the star sealing relay 5, the permanent magnet synchronous motor 6, the current sampling circuit 7 and the main controller 8.
When the elevator system is in normal operation under the condition of electricity, the power grid charges the capacitor 2, and when the elevator system is subjected to unexpected power failure, the capacitor discharges outwards, so that the system can work in a short time. The power failure detection circuit 1 can enable the main controller 8 to know the power supply state of the power grid in time, and is used for driving the power inverter unit 4 to realize software star sealing at the first time. In the process of the software star sealing, the star sealing current is monitored through the current sampling circuit 7, and when the star sealing current is overlarge, the output power of the power inversion unit is regulated through regulating the duty ratio of the power inversion unit, so that the protection of the power inversion circuit in the stage of the software star sealing (first closing stage) is realized. In the software star sealing stage, the elevator system monitors the bus voltage value through the bus voltage detection circuit 3, the bus voltage value gradually decreases along with continuous consumption of the capacitance electric quantity, and the elevator system is switched to the hardware relay star sealing stage when the bus voltage value decreases to a certain threshold value, and then enters a second closing stage from the first closing stage.
When the elevator is detected to be powered off, the power inverter unit is firstly adopted to short the power line of the motor to generate braking force, so that the situation that the elevator is rapidly closed to hurt people is avoided. When the voltage of the capacitor discharged reaches the working voltage of the star sealing relay, the star sealing relay is started, and the motor power line is short-circuited through the star sealing relay to generate braking force, so that the elevator is prevented from being closed rapidly in the second closing stage. Therefore, the two modes of software star sealing and hardware star sealing are combined, the closing of the elevator door is controlled, the safety of closing the elevator door under the condition of power failure is improved, and meanwhile, the situation that the star sealing relay is directly adopted to seal the star by hardware under the condition that the voltage output by the capacitor is higher is avoided, and the service life of the star sealing relay is shortened.
Referring to fig. 2, fig. 2 is a schematic flow chart of a first embodiment of an elevator control method of the present application, the elevator including a power-down detection unit for detecting whether the elevator is powered off, a capacitor for discharging the outside, and a bus voltage detection circuit for detecting a voltage, the elevator control method comprising:
step S10, when the power failure detection unit detects that the elevator is powered off, the main controller controls the capacitor to discharge, and the driving power inversion unit controls the elevator door to be closed in a first closing stage after the elevator is powered off;
in this embodiment, the main body of execution of the elevator control method is an elevator control device, and in this embodiment, the elevator control device may be a main controller, but in other embodiments, it may be determined according to actual needs, and this embodiment is not limited thereto.
In the present embodiment, when the power failure detection unit detects that the elevator is powered off, the elevator door may be in a fully opened state or in a closing state, which is not limited in the present embodiment.
The first closing stage is a stage that after the power failure detection unit detects that the elevator is powered off, the active controller controls the elevator door to be closed through the driving power inversion unit until the star-sealing relay is started to drive the elevator door to be closed.
The duration of the first closing phase is determined by the electric quantity of the capacitor, and may be 3s when the electric quantity of the capacitor is sufficient, and may be 1s when the electric quantity of the capacitor is insufficient.
And after receiving the start of the discharge quantity outside the capacitor, the power inverter unit short-circuits the power line of the permanent magnet synchronous motor to generate braking force and control the door closing speed of the elevator.
In this embodiment, in order to prevent the capacitor from being dead when the elevator is powered off, the electric quantity of the capacitor is detected when the elevator is operating normally, and the capacitor is charged when the electric quantity of the capacitor is smaller than a preset electric quantity.
Step S20, obtaining a bus voltage value detected by the bus voltage detection circuit;
and step S30, when the bus voltage value is smaller than the first voltage threshold value, starting the star-sealing relay to short the permanent magnet synchronous motor at a second closing stage after the elevator is powered off so as to control the elevator door to be closed.
In the first closing stage, the main controller acquires a voltage value detected by the bus voltage detection circuit, and determines whether to start the star-sealing relay to short the motor power line according to the bus voltage value. Optionally, when the group controller obtains that the bus voltage value is smaller than the first voltage threshold value, the star-sealing relay is started. The star-sealing relay generates braking force through shorting the power line of the permanent magnet synchronous motor, and controls the door closing speed of the elevator.
The second closing stage is a stage from the start of the star-sealing relay to the closing of the elevator door.
The time of the first closing phase and the second closing phase in the application is the time for controlling the elevator door from the open state to the closed state when the elevator is de-energized.
In this embodiment, in the case of power failure, the speed of closing when the elevator door is closed is controlled by driving the power inverter unit, and the speed of closing when the elevator door is controlled by the star-sealing relay may be set to coincide with the speed of closing when the elevator is in the normal power-on condition.
Optionally, the speed of closing the elevator door in the case of power failure can also be set according to the traveling speed of the passenger currently entering or exiting the elevator, for example, in the case of a slower traveling speed of the passenger (for example, the old or a person with a traveling obstacle), the closing speed of the elevator door can be controlled to be smaller by controlling the driving power inversion unit and/or the star relay to generate a larger braking force, thereby reserving time for the passenger and avoiding the passenger from being injured.
In the embodiment, when the elevator is detected to be powered off, a power inversion unit is firstly adopted to short-circuit a motor power line to generate braking force, so that the elevator door is prevented from being closed rapidly in a first closing stage, and people are prevented from being injured by clamping; and when the voltage of the capacitor discharging outwards reaches a first voltage threshold, starting the star-sealing relay, and shorting a motor power line through the star-sealing relay to generate braking force, so that the elevator door is prevented from being closed rapidly in a second closing stage. Therefore, the situation that the star sealing relay is directly adopted to seal the star by hardware under the condition that the voltage output by the capacitor is higher is avoided, the service life of the star sealing relay is lost, the closing speed of the elevator door is effectively controlled when the elevator is powered off, and meanwhile, the service life of the star sealing relay is prolonged.
Referring to fig. 4, fig. 4 is a schematic flow chart of determining to adjust the output power of the power inverter unit according to the elevator control method of the present application, and after the step S20, further includes:
step S01, acquiring a current value acquired by the current sampling circuit and a bus voltage value detected by the bus voltage detection circuit;
and step S02, determining whether to adjust the output power of the power inversion unit according to the current value and/or the bus voltage value.
The elevator comprises a current sampling circuit which collects the current of the power inversion unit when the elevator is powered off.
In this embodiment, in the first shutdown stage, a current value is acquired by the current sampling circuit, and/or a bus voltage value is acquired by the bus voltage detection circuit, and whether to adjust the output power of the power inverter unit is determined according to the acquired current value and voltage value. In this embodiment, whether to adjust the output power of the power inverter unit is determined by the collected current value and/or the bus voltage value, so as to realize protection of the power inverter unit.
The step of determining whether to adjust the output power of the power inverter unit according to the current value and/or the bus voltage value comprises the following steps:
when the current value is greater than or equal to a current threshold value, determining to adjust the output power of the power inverter unit; and/or the number of the groups of groups,
and when the bus voltage value is greater than or equal to the second voltage threshold value, determining to adjust the output power of the power inversion unit, wherein the second voltage threshold value is greater than the first voltage threshold value.
In this embodiment, when the current value is greater than or equal to the current threshold value, the main controller adjusts the output power of the power inverter unit.
The current threshold is a preset current value when the power inverter module works normally, and the magnitude of the current threshold is determined according to the configuration of the power inverter module, for example, the current threshold may be 1A.
In addition, in this embodiment, the output power of the power inverter module may be determined to be adjusted according to the bus voltage value detected by the bus voltage detection circuit being greater than or equal to the second voltage threshold.
The second voltage threshold is a preset voltage value of the power inverter module during normal operation, and the magnitude of the second voltage threshold is determined according to the configuration of the power inverter module, for example, the second voltage threshold may be 2V. Wherein the second voltage threshold is less than the first voltage threshold.
And when the bus voltage value is smaller than the second voltage threshold and larger than or equal to the first voltage threshold, determining to drive the power inverter unit to control the elevator door to be closed, and preventing the elevator door from being closed too fast.
Optionally, in this embodiment, it is also determined by the current sampling circuit and the bus voltage detecting circuit at the same time whether to adjust the output power of the power inverting unit. For example, when the main controller receives that the current value acquired by the current sampling circuit is greater than the current threshold value and the bus voltage value detected by the bus voltage detection circuit is greater than the second voltage threshold value, the output power of the power inverter module is adjusted.
In this embodiment, the main controller determines to adjust the output power of the power inverter unit through the current value collected by the current sampling circuit and the bus voltage value detected by the bus voltage detecting circuit, thereby improving the accuracy of adjusting the power inverter unit.
Based on the above embodiment, the present application proposes yet another embodiment. The step of determining to adjust the output power of the power inverter unit includes:
and adjusting the duty ratio of the power inversion unit to adjust the output power of the power inversion unit.
In this embodiment, the output power of the power inverter is adjusted by adjusting the duty ratio of the power inverter.
Alternatively, the output power of the power inverter unit may be adjusted by hysteresis control or PI adjustment, so as to implement adjustment of the current and voltage through power inversion.
In the embodiment, the voltage and the current of the power inverter unit are regulated in a mode of regulating the duty ratio, so that the power inverter unit is protected.
The step of adjusting the duty ratio of the power inverter unit includes:
adjusting the action time of a switching tube of the power inversion unit to adjust the duty ratio of the power inversion unit; and/or the number of the groups of groups,
and adjusting the cross action of the switching tube of the power inversion unit to adjust the duty ratio of the power inversion unit.
In this embodiment, the power inverter unit includes six switching tubes, and when the duty ratio of the power inverter unit is adjusted, the action time of the six switching tubes, that is, the time interval of opening or closing the six fast switching tubes, can be adjusted to achieve the effect of adjusting the output power of the power inverter module.
In addition, the cross action of the six-way switching tube can be adjusted, so that the duty ratio of the power inverter unit can be adjusted.
In this embodiment, the duty ratio of the power inverter unit is adjusted by adjusting the operation time of the switching tube and the cross operation of the switching tube, thereby achieving the purpose of protecting the power inverter unit.
Referring to fig. 5, fig. 5 is a schematic flow chart of an embodiment of the present application. In order to more clearly explain the inventive concept of the elevator control method of the present application, a specific implementation flow of the application will be described with reference to fig. 5.
The main controller detects the system power failure through the power failure detection circuit 1, and in the first closing stage, the main controller realizes the software star sealing through the power inverter unit 4. The main controller 8 detects the star seal current through the current sampling circuit 7. Judging whether the star current exceeds the bearing capacity of the power inverter unit 4, and if so, turning to step 15. When the star sealing current is overlarge, the star sealing duty ratio is adjusted, and the star sealing current is reduced, wherein the action mode of adjusting the duty ratio comprises, but is not limited to, adjusting the action time of a switching tube, the staggered action of the switching tube, PI, hysteresis and the like. And the main controller detects the bus voltage value through the bus voltage sampling circuit 3, judges whether the bus voltage reaches a set high threshold value, if yes, the step 15 is shifted to, judges whether the bus voltage value reaches a low threshold value, and if yes, the software star sealing operation is continued. The bus voltage value is reduced to the acceptable threshold value of the relay, and the hardware relay star-sealing action is executed.
Further, referring to fig. 6, fig. 6 is a schematic view of functional blocks of an elevator control apparatus of the present application, and the present application also provides an elevator control apparatus including:
the control unit 10 is used for controlling the capacitor to discharge when the power failure detection unit detects that the elevator is powered off, and driving the power inversion unit to control the elevator door to be closed in a first closing stage after the elevator is powered off;
an acquisition unit 20 for acquiring the bus voltage value detected by the bus voltage detection circuit;
and the starting unit 30 is used for starting the star-sealing relay to short the permanent magnet synchronous motor to control the elevator door to be closed in a second closing stage after the elevator is powered off when the bus voltage value is smaller than the first voltage threshold value.
In addition, in order to achieve the above object, the present application provides an elevator comprising a memory, a processor and an elevator control program stored on the memory and executable on the processor, which elevator control program, when executed by the processor, implements the steps of the elevator control method as set forth in any one of the above.
In addition, in order to achieve the above object, the present application also provides a computer-readable storage medium having stored thereon an elevator control program which, when executed by a processor, implements the steps of the elevator control method according to any one of the above.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present application are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) as described above, comprising several instructions for causing a terminal device (which may be a smart tv, a mobile phone, a computer, etc.) to perform the method according to the embodiments of the present application.
The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the application, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (9)
1. An elevator control method, characterized in that the elevator comprises a power failure detection unit for detecting whether the elevator is powered off, a capacitor for discharging outside, a bus voltage detection circuit for detecting voltage, and a current sampling circuit, the elevator control method comprising:
when the power failure detection unit detects that the elevator is powered off, the main controller controls the capacitor to discharge, and the driving power inversion unit controls the elevator door to be closed in a first closing stage after the elevator is powered off;
acquiring a current value acquired by the current sampling circuit and a bus voltage value detected by the bus voltage detection circuit;
determining whether to adjust the output power of the power inverter unit according to the current value and/or the bus voltage value;
and when the bus voltage value is smaller than a first voltage threshold value, starting the star-sealing relay to short-circuit the permanent magnet synchronous motor at a second closing stage after the elevator is powered off so as to control the elevator door to be closed.
2. The elevator control method according to claim 1, wherein the step of determining whether to adjust the output power of the power inverter unit according to the current value and/or the bus voltage value includes:
when the current value is greater than or equal to a current threshold value, determining to adjust the output power of the power inverter unit; and/or the number of the groups of groups,
and when the bus voltage value is greater than or equal to a second voltage threshold value, determining to adjust the output power of the power inversion unit, wherein the second voltage threshold value is greater than the first voltage threshold value.
3. The elevator control method according to claim 2, wherein after the step of acquiring the current value acquired by the current sampling circuit and the bus voltage value detected by the bus voltage detecting circuit, further comprising:
and when the bus voltage value is smaller than the second voltage threshold value and larger than or equal to the first voltage threshold value, determining to drive the power inverter unit to control the elevator door to be closed.
4. The elevator control method of claim 2, wherein the determining to adjust the output power of the power inverter unit comprises:
and adjusting the duty ratio of the power inversion unit to adjust the output power of the power inversion unit.
5. The elevator control method of claim 3, wherein the step of adjusting the duty cycle of the power inverter unit comprises:
adjusting the action time of a switching tube of the power inversion unit to adjust the duty ratio of the power inversion unit; and/or the number of the groups of groups,
and adjusting the cross action of the switching tube of the power inversion unit to adjust the duty ratio of the power inversion unit.
6. The elevator control method according to claim 1, wherein the main controller controls the capacitor to discharge when the power failure detection unit detects the power failure of the elevator, and the driving power inverter unit includes, before the step of controlling the elevator door to close in a first closing stage after the power failure of the elevator:
detecting the electric quantity of the capacitor when the elevator normally operates;
and when the electric quantity of the capacitor is smaller than the preset electric quantity, charging the capacitor.
7. An elevator control device, characterized in that the elevator control device comprises:
the control unit is used for controlling the capacitor to discharge when the power failure detection unit detects that the elevator is powered off, and driving the power inversion unit to control the elevator door to be closed in a first closing stage after the elevator is powered off;
the acquisition unit is used for acquiring the current value acquired by the current sampling circuit and the bus voltage value detected by the bus voltage detection circuit; determining whether to adjust the output power of the power inverter unit according to the current value and/or the bus voltage value;
and the starting unit is used for starting the star-sealing relay to short the permanent magnet synchronous motor to control the elevator door to be closed in a second closing stage after the elevator is powered off when the bus voltage value is smaller than the first voltage threshold value.
8. Elevator, characterized in that it comprises a memory, a processor and an elevator control program stored on the memory and being operable on the processor, which elevator control program, when being executed by the processor, realizes the steps of the elevator control method according to any one of claims 1-6.
9. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon an elevator control program, which when executed by a processor realizes the steps of the elevator control method according to any of claims 1-6.
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| CN116409690B (en) * | 2023-06-09 | 2023-08-18 | 康力电梯股份有限公司 | Method and device for realizing self-adaption of elevator star sealing |
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