CN110350806A - A kind of band-type brake power supply - Google Patents
A kind of band-type brake power supply Download PDFInfo
- Publication number
- CN110350806A CN110350806A CN201910649940.6A CN201910649940A CN110350806A CN 110350806 A CN110350806 A CN 110350806A CN 201910649940 A CN201910649940 A CN 201910649940A CN 110350806 A CN110350806 A CN 110350806A
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- CN
- China
- Prior art keywords
- band
- type brake
- power supply
- resistance
- transistor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
- B66B1/3415—Control system configuration and the data transmission or communication within the control system
- B66B1/3423—Control system configuration, i.e. lay-out
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0006—Monitoring devices or performance analysers
- B66B5/0018—Devices monitoring the operating condition of the elevator system
- B66B5/0031—Devices monitoring the operating condition of the elevator system for safety reasons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
- H02H3/202—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage for dc systems
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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
- 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
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Computer Networks & Wireless Communication (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of band-type brake power supplys, including Switching Power Supply, overvoltage crowbar and detection circuit.Switching Power Supply is used to give AC rectification to band-type brake coil power supply at reduced output voltage after direct current, and carries out feedback regulation to the direct current of output, stablizes the direct current of output；Overvoltage crowbar is used to provide overvoltage protection to band-type brake coil；Detection circuit is used to detect the energized state of band-type brake coil.It is powered using Switching Power Supply to band-type brake, is not necessarily to Industrial Frequency Transformer, reduce the volume and cost of band-type brake power supply, and the voltage stabilization exported.Overvoltage crowbar and detection circuit are set, the reliability of band-type brake power supply is improved.
Description
Technical field
The present invention relates to elevators fields, and in particular to a kind of band-type brake power supply.
Background technique
Elevator machine brake is all made of electromagnetic brake mode, and current band-type brake power supply is inputted using alternating current, uses
The mode that Industrial Frequency Transformer rectifies again exports direct current to power, alternatively, being inputted using direct current, after Industrial Frequency Transformer transformation
Power supply, the equal Shortcomings of both modes: volume of transformer is at high cost greatly, and input voltage variation is easy that output is made to generate larger change
Change, voltage is high, and band-type brake output supply voltage is also high to cause fever serious, and input voltage is low, causes band-type brake is insufficient to lead to band-type brake
Abrasion.Band-type brake power supply is also cut off using operation contactor and band-type brake contactor when actually controlling band-type brake, also results in cost
Height, volume are big.Moreover, existing band-type brake power supply can not detect the power supply state of band-type brake automatically, it is unfavorable for controlling band-type brake.
Therefore, the power supply of existing elevator internal contracting brake could be improved and improve.
Summary of the invention
Present invention generally provides a kind of band-type brake power supplys, to reduce the volume and cost of band-type brake power supply.
One embodiment provides a kind of band-type brake power supply, comprising:
Switching Power Supply, for giving AC rectification to band-type brake coil power supply at reduced output voltage after direct current, and to output
Direct current carries out feedback regulation, stablizes the direct current of output；
Overvoltage crowbar, for providing overvoltage protection to band-type brake coil；
Detection circuit, for detecting the energized state of band-type brake coil.
The band-type brake power supply further include:
Circuit for controlling electricity turning controls signal for band-type brake based on the received, and control band-type brake coil is powered or power-off.
In the band-type brake power supply, the circuit for controlling electricity turning includes:
The first transistor；
First isolation circuit, for received band-type brake control signal to be carried out isolation conversion, the band-type brake after conversion controls letter
Number output controls the on-off of the first transistor to the first transistor；The control of the output end and the first transistor of first isolation circuit
Pole connection processed；
The first transistor is connected with band-type brake coil, controls leading between band-type brake coil and Switching Power Supply by the on-off of itself
On and off is opened.
In the band-type brake power supply, it includes: in switch electricity that the overvoltage crowbar, which provides overvoltage protection to band-type brake coil,
When the voltage of source output is more than preset value, the on-off by controlling the first transistor makes band-type brake coil blackout.
In the band-type brake power supply, the detection circuit includes:
Second transistor；
Second isolation circuit, the voltage letter for the voltage signal at band-type brake coil both ends to be carried out isolation conversion, after conversion
Number output controls the on-off of second transistor to second transistor；The control of the output end and second transistor of second isolation circuit
Pole connection processed；
First pole external power supply of second transistor, the second pole ground connection of second transistor；Voltage after the conversion
Under the control of signal, second transistor is grounded first pole or earth-free by the on-off of itself, to realize described first
The energized state of the voltage signal reaction band-type brake coil of pole.
In the band-type brake power supply, the Switching Power Supply includes:
Rectification circuit is used for AC rectification into direct current；
Switching tube；
The voltage of feed circuit, the direct current for exporting to Switching Power Supply is fed back；
Pwm chip is depressured the direct current after rectification for carrying out PWM control by switch tube；
PWM control is carried out to the switching tube according to the feedback signal of feed circuit output, the voltage for exporting Switching Power Supply is protected
It is fixed to keep steady.
In the band-type brake power supply, first isolation circuit includes: first resistor, second resistance, 3rd resistor, and the 4th
Resistance, first capacitor and the first optocoupler；One end of first resistor is the input terminal of the first isolation circuit, and connection band-type brake controls signal
End is provided；The other end of first resistor connects the 1st pin of the first optocoupler, and is grounded by first capacitor, passes through second resistance
Ground connection；2nd pin of the first optocoupler is grounded, and the 4th pin of the first optocoupler connects the first external power supply end by 3rd resistor；The
3rd pin of one optocoupler is the output end of the first isolation circuit, connects the control electrode of the first transistor and one end of the 4th resistance；
The output voltage reference edge of the other end connection switch power supply of 4th resistance.
In the band-type brake power supply, the overvoltage crowbar includes: the 5th resistance, the 6th resistance, the 7th resistance, and second
Capacitor, the first zener diode and third transistor；One end of 5th resistance is the input terminal of overvoltage crowbar, connection switch
The output end of power supply, the other end of the 5th resistance connect two pole of one end and the first pressure stabilizing of one end of the 6th resistance, the second capacitor
The cathode of pipe；One end of anode the 7th resistance of connection of first zener diode and the control electrode of third transistor；Third crystal
The output end of the extremely overvoltage crowbar of the first of pipe, connects the control electrode of the first transistor；Second pole of third transistor,
The other end of the other end of six resistance, the other end of the second capacitor and the 7th resistance is all connected with the output voltage benchmark of Switching Power Supply
End.
In the band-type brake power supply, second isolation circuit includes: the 8th resistance, the 9th resistance, the tenth resistance, and the tenth
One resistance, twelfth resistor, thirteenth resistor, the second zener diode and the second optocoupler；One end of 8th resistance be second every
Input terminal from circuit, connects one end of band-type brake coil, and the other end of the 8th resistance connects one end and second of the 9th resistance surely
Press the cathode of diode；The other end of 9th resistance connects one end of the 1st pin and the tenth resistance of the second optocoupler；Second optocoupler
The 2nd pin and the other end of the tenth resistance be all connected with the other end of band-type brake coil；4th pin of the second optocoupler passes through the 11st
Resistance connects the one end at the second external power supply end, twelfth resistor；The of the other end connection second transistor of twelfth resistor
One pole；3rd pin of the second optocoupler is the output end of the second isolation circuit, connects the control electrode and the 13rd electricity of second transistor
One end of resistance；The other end of thirteenth resistor is grounded.
In the band-type brake power supply, the Switching Power Supply is BUCK type topological structure.
According to the band-type brake power supply of above-described embodiment, including Switching Power Supply, overvoltage crowbar and detection circuit.Switching Power Supply
For giving AC rectification to band-type brake coil power supply at reduced output voltage after direct current, and feedback tune is carried out to the direct current of output
Section stablizes the direct current of output；Overvoltage crowbar is used to provide overvoltage protection to band-type brake coil；Detection circuit is for detecting
The energized state of band-type brake coil.It is powered using Switching Power Supply to band-type brake, is not necessarily to Industrial Frequency Transformer, reduces the volume of band-type brake power supply
And cost, and the voltage stabilization exported.Overvoltage crowbar and detection circuit are set, the reliability of band-type brake power supply is improved.
Detailed description of the invention
Fig. 1 is the structural block diagram of band-type brake power supply provided by the invention；
Fig. 2 is the circuit diagram of Switching Power Supply in band-type brake power supply provided by the invention；
Fig. 3 is the circuit diagram of circuit for controlling electricity turning and overvoltage crowbar in band-type brake power supply provided by the invention；
Fig. 4 is the circuit diagram of detection circuit in band-type brake power supply provided by the invention.
Specific embodiment
Below by specific embodiment combination attached drawing, invention is further described in detail.Wherein different embodiments
Middle similar component uses associated similar element numbers.In the following embodiments, many datail descriptions be in order to
The application is better understood.However, those skilled in the art can recognize without lifting an eyebrow, part of feature
It is dispensed, or can be substituted by other elements, material, method in varied situations.In some cases, this Shen
Please it is relevant it is some operation there is no in the description show or describe, this is the core in order to avoid the application by mistake
More descriptions are flooded, and to those skilled in the art, these relevant operations, which are described in detail, not to be necessary, they
Relevant operation can be completely understood according to the general technology knowledge of description and this field in specification.
It is formed respectively in addition, feature described in this description, operation or feature can combine in any suitable way
Kind embodiment.Meanwhile each step in method description or movement can also can be aobvious and easy according to those skilled in the art institute
The mode carry out sequence exchange or adjustment seen.Therefore, the various sequences in the description and the appended drawings are intended merely to clearly describe a certain
A embodiment is not meant to be necessary sequence, and wherein some sequentially must comply with unless otherwise indicated.
It is herein component institute serialization number itself, such as " first ", " second " etc., is only used for distinguishing described object,
Without any sequence or art-recognized meanings.And " connection ", " connection " described in the application, unless otherwise instructed, include directly and
It is indirectly connected with (connection).
As shown in Figure 1, band-type brake power supply provided by the invention, including Switching Power Supply 10, circuit for controlling electricity turning 20, overvoltage protection
Circuit 30 and detection circuit 40.The present invention uses Switching Power Supply for band-type brake coil power supply, is not necessarily to Industrial Frequency Transformer, saves band-type brake
The volume of power supply, Switching Power Supply dissipation is low, and it is less to generate waste heat for energy conservation.There are two the band-type brakes of usual elevator, a band-type brake (electricity
Terraced brake) it is to be in the electromechanical assembly under power failure state prevented elevator from moving again when lift car is in static and motor, separately
One (elevator door arrester) is to prevent elevator door from moving again when elevator door is in static and motor and is under power failure state
Electromechanical assembly；Band-type brake uses electromagnetic brake in the present embodiment.Band-type brake power supply provided by the invention is applicable to elevator brake,
It is also applied for elevator door arrester.Switching power circuit 10 includes major loop 110 and control loop, and control loop is by control chip
120 and feed circuit 130 constitute.Major loop 110 is the access that flows through of power current in Switching Power Supply 10, including rectification, filtering,
The functions such as energy storage, switch.Control loop is depressured using PWM control mode, and maintains output voltage by feedback signal
Stabilization.The input terminal input AC electricity of the major loop 110 of Switching Power Supply, such as alternating current, output end pass through circuit for controlling electricity turning
20 connection band-type brake coil J1.The present invention is the improvement to circuit, therefore " connection " in text is electrical connection.
Referring to Figure 2 together, Switching Power Supply 10 is for giving AC rectification at reduced output voltage after direct current Ubuck-com
Band-type brake coil J1 power supply, and feedback regulation is carried out to the direct current of output, stablize the direct current of output.Switching Power Supply 10 includes
For by AC rectification at the rectification circuit BR1 of direct current, switching tube Q, feed circuit and pwm chip U.
The voltage for the direct current that feed circuit is used to export Switching Power Supply 10 is fed back.
Pwm chip U is used to carry out PWM control by switch tube Q, drops to the direct current after rectification
Pressure；PWM control is carried out to the switching tube Q according to the feedback signal of feed circuit output, exports Switching Power Supply 10
Voltage keeps stablizing.
Circuit for controlling electricity turning 20 controls signal for band-type brake based on the received, and control band-type brake coil J1 is powered or power-off.It is logical
Electric control circuit 20 includes the first transistor Q1 and the first isolation circuit 220.First isolation circuit 220 is used for received band-type brake
Control signal carries out isolation conversion, and the band-type brake control signal after conversion is exported to the first transistor Q1 to control the first transistor Q1
On-off；The output end of first isolation circuit 220 is connect with the control electrode of the first transistor Q1.The first transistor in the present embodiment
Q1 connects with band-type brake coil J1, controls conducting and disconnection between band-type brake coil J1 and Switching Power Supply 10 by the on-off of itself,
To realize the power control to band-type brake coil J1.
Overvoltage crowbar 30 is used to provide overvoltage protection to band-type brake coil J1, for example, the electricity exported in Switching Power Supply 10
When pressure is more than preset value, the on-off by controlling the first transistor Q1 powers off band-type brake coil J1.
Detection circuit 40 is used to detect the energized state of band-type brake coil J1.Referring to Fig. 4, detection circuit 40 includes second brilliant
Body pipe Q2 and the second isolation circuit.Second isolation circuit is used to the voltage signal at the both ends band-type brake coil J1 carrying out isolation conversion,
Voltage signal after conversion exports the on-off that second transistor Q2 is controlled to second transistor Q2；The output of second isolation circuit
End is connect with the control electrode of second transistor Q2.
The second pole of the first pole external power supply VCC2 of second transistor Q2, second transistor Q2 are grounded；In the conversion
Under the control of voltage signal afterwards, second transistor Q2 is grounded first pole or earth-free by the on-off of itself, with reality
The energized state of the voltage signal reaction band-type brake coil J1 of existing first pole.
The present invention improves the reliability of band-type brake power supply by setting overvoltage crowbar 30 and detection circuit 40.
As shown in figure 3, the first isolation circuit 220 includes: first resistor R1, second resistance R2,3rd resistor R3, the 4th electricity
Hinder R4, first capacitor C1, the first optocoupler U1 and zener diode ZD.One end of first resistor R1 is the first isolation circuit 220
Input terminal, connection band-type brake control signal provide end BK_CTRL；Draw the 1st of the first optocoupler U1 of other end connection of first resistor R1
Foot, and be grounded by first capacitor C1 ground connection, by second resistance R2；The 2nd pin of first optocoupler U1 is grounded, the first optocoupler U1
The 4th pin pass through the first external power supply of 3rd resistor R3 connection end VCC1；The 3rd pin of first optocoupler U1 is the first isolation electricity
The output end on road connects control electrode, one end of the 4th resistance R4 and the cathode of zener diode ZD of the first transistor Q1；4th
The other end of resistance R4 and the anode of zener diode ZD are all connected with the output voltage reference edge COM of Switching Power Supply 10.Output electricity
Pressure reference edge COM is for the output end BUCK of Switching Power Supply, i.e. the voltage of Switching Power Supply output is BUCK and COM
Voltage difference.In the present embodiment, the first pole of the first transistor Q1 passes through the end band-type brake coil J1 connection BUCK, the connection of the second pole
The end COM, i.e. the first transistor Q1 and band-type brake coil J1 are connected on BUCK and the both ends COM.When band-type brake control signal provides end BK_
CTRL exports band-type brake and controls signal, and band-type brake controls signal by first resistor R1 and the first optocoupler U1, the first optocoupler U1 conducting.The
After one optocoupler U1 conducting, VCC1 drives the first transistor Q1 to be connected by 3rd resistor R3 and the first optocoupler U1.First crystal
After pipe Q1 conducting, BUCK and the both ends COM DC voltage are loaded into band-type brake coil J1, so that band-type brake coil J1 obtains electric declutch.
As it can be seen that power supply of the present invention using the first transistor Q1 control band-type brake reduces band-type brake electricity without using contactor
The cost and volume in source.In the present embodiment, the first transistor Q1 use N-channel MOS pipe, the control extremely grid of metal-oxide-semiconductor Q1,
Connect the 3rd pin of the first optocoupler U1.The first of metal-oxide-semiconductor Q1 extremely drains, and passes through the end band-type brake coil J1 connection BUCK.It should
The extremely source electrode of the second of metal-oxide-semiconductor Q1 connects the end COM.Certainly, in other embodiments, P-channel can be used in the first transistor Q1
Metal-oxide-semiconductor need to only correspond to the low and high level of modification control signal；Triode, relay etc., to realize can certainly be used
Switch control.
In the present embodiment, overvoltage crowbar 30 includes: the electricity of the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, second
Hold C2, the first zener diode ZD1, first diode D1 and third transistor Q3.First diode D1 and band-type brake coil J1 are simultaneously
Connection, cathode connect one end of band-type brake coil J1, the other end of anode connection band-type brake coil J1.One end of 5th resistance R5 is
The input terminal of overvoltage crowbar 30, the other end connection the 6th of the output end BUCK, the 5th resistance R5 of connection switch power supply 10
The cathode of one end of resistance R6, one end of the second capacitor C2 and the first zener diode ZD1；First zener diode ZD1 is just
Pole connects one end of the 7th resistance R7 and the control electrode of third transistor Q3；The extremely overvoltage protection electricity of the first of third transistor Q3
The output end on road 30 connects the control electrode of the first transistor Q1；The second pole of third transistor Q3, the 6th resistance R6 it is another
The other end at end, the other end of the second capacitor C2 and the 7th resistance R7 is all connected with the output voltage reference edge COM of Switching Power Supply 10.
In the present embodiment, third transistor Q3 uses NPN triode, and the control extremely base stage of NPN triode Q3 connects the first pressure stabilizing
The anode of diode ZD1；Its first extremely collector of NPN triode Q3, connects the control electrode of the first transistor Q1；It second
The extremely emitter of NPN triode Q3, the output voltage reference edge COM of connection switch power supply 10.Certainly, in other embodiments
In, PNP triode can be used in third transistor Q3, need to only correspond to the low and high level of modification control signal, naturally it is also possible to
Using metal-oxide-semiconductor etc..
When the buck functionality of Switching Power Supply 10 damages, the switching tube Q damage of Switching Power Supply 10 leads to BUCK and the both ends COM
Overtension, BUCK form branch pressure voltage by the 5th resistance R5, the 6th resistance R6 and are greater than the first zener diode ZD1 and three poles
When the sum of ground level and emitter conduction voltage drop of pipe Q3, triode Q3 conducting, the grid step voltage of the first transistor Q1 is fixed on
Low potential, band-type brake coil J1 can not power at this time, therefore not controlled signal control by band-type brake, complete over-voltage protecting function.
Referring to Fig. 4, the second isolation circuit includes: the second diode electricity of D2, the 8th resistance R8, the 9th resistance R9, the tenth
Hinder R10, eleventh resistor R11, twelfth resistor R12, thirteenth resistor R13, Light-emitting diode LED 1, the second zener diode
ZD2 and the second optocoupler U2；One end of 8th resistance R8 is the input terminal of the second isolation circuit, connects one end of band-type brake coil J1,
The other end of 8th resistance R8 connects the cathode and light emitting diode of one end of the 9th resistance R9, the second zener diode ZD2
The anode of LED1；The other end of 9th resistance R9 connect the 1st pin of the second optocoupler U2, the tenth resistance R10 one end and shine
The cathode of diode (LED) 1；The 2nd pin of second optocoupler U2 and the other end of the tenth resistance R10 pass through the second diode D2 company
Connect the other end of band-type brake coil J1；The 4th pin of second optocoupler U2 passes through the second external power supply of eleventh resistor R11 connection end
One end of VCC2, twelfth resistor R12；The first pole of the other end connection second transistor Q2 of twelfth resistor R12；Second light
The 3rd pin of coupling U2 is the output end of the second isolation circuit, connects the control electrode and thirteenth resistor R13 of second transistor Q2
One end；The other end of thirteenth resistor R13 is grounded.In the present embodiment, second transistor Q2 uses NPN triode, control electrode
For the base stage of NPN triode Q2, the 3rd pin of the second optocoupler U2 is connected；Its first extremely collector of NPN triode Q2, even
Connect the other end of twelfth resistor R12；Its second extremely emitter of NPN triode Q2, ground connection.Certainly, in other embodiments
In, PNP triode can be used in second transistor Q2, need to only correspond to the low and high level of modification control signal, naturally it is also possible to
Using metal-oxide-semiconductor etc..
Circuit diagram as shown in Figure 4 it is found that when band-type brake coil J1 is powered, band-type brake coil J1 both end voltage by R8, R9,
U2, D2 form access, U2 conducting, and VCC2 is pulled to GND current potential, band-type brake feedback letter by R11, U2, Q2 conducting, the collector of Q2
It number is lower.In band-type brake coil J1 no power, U2 is not turned on, and the ground level of Q2 is limited in GND current potential and is not turned on by R13.VCC2
By R12, so that band-type brake feedback signal is height.Determine band-type brake coil J1's by detecting the low and high level of band-type brake feedback signal
Working condition.Also, the present invention uses Light-emitting diode LED 1 also to indicate the energized state (working condition) of band-type brake coil J1,
Personnel convenient for safeguarding overhaul.
As shown in Fig. 2, Switching Power Supply 10 of the invention uses BUCK type topological structure, major loop 110 includes rectified current
Road BR1, the 14th resistance R14, third capacitor C3, the 4th capacitor C4, switching tube Q1, inductance and third diode D3.Rectified current
The output end of road BR1 is also connected with one end of the 4th capacitor C4, the 4th capacitor C4 by third capacitor C3 connection voltage reference points N
One end be Switching Power Supply 10 output end BUCK.The output voltage benchmark of the other end connection switch power supply 10 of 4th capacitor C4
Hold COM.One end of 14th resistance R14 connects voltage reference points N, and the of the other end connection switch pipe Q of the 14th resistance R14
One pole, the output end OUT of the control electrode connection pwm chip U of switching tube Q.The second pole of switching tube Q passes through third diode
The output end BUCK of D3 connection switch power supply 10, the output voltage reference edge COM for also passing through inductance connection Switching Power Supply 10.This reality
It applies in example, inductance is the armature winding of transformer T, and the armature winding of transformer T passes through a diode rectification, a capacitor filter
After wave, direct current VCC is exported, is powered as accessory power supply to pwm chip U or other circuits.
In the present embodiment, feed circuit 130 include the 15th resistance R15, the 16th resistance R16, the 17th resistance R17,
18th resistance R18, the 19th resistance R19, the 20th resistance R20, the 21st resistance R21, the 5th capacitor C5, the 6th capacitor
C6, third zener diode ZD3, third optocoupler U3 and controllable accurate source of stable pressure U4.One end and the 16th of 15th resistance R15
One end of resistance R16 is all connected with the end BUCK, and the other end of the 15th resistance R15 connects the first external power supply end VCC1, the 17th
One end of resistance R17 and the cathode of third zener diode ZD3, the anode connection end COM of third zener diode ZD3.Tenth
One end of the 1st pin and the 18th resistance R18 of the other end connection third optocoupler U3 of seven resistance R17.18th resistance R18's
The 2nd pin, one end of the 5th capacitor C5, one end of the 19th resistance R19 and the controllable accurate of other end connection third optocoupler U3
The 2nd pin of source of stable pressure U4.The other end of 5th capacitor C5 connect the other end of the 16th resistance R16, the 6th capacitor C6 one
It holds, one end of the 1st pin and the 20th resistance R20 of controllable accurate source of stable pressure U4.The other end of 20th resistance R20 connects
The end COM.The 3rd pin of controllable accurate source of stable pressure U4 connects the end COM.The 3rd pin of third optocoupler U3 connects voltage reference points N.
The 4th pin of third optocoupler U3 be the output end of feed circuit 130, connect pwm chip U (feedback signal connects at the end COMP
Receiving end), also end is provided by the 21st resistance R21 connection 5V direct current.In the present embodiment, pwm chip U is used
UC2842 chip.
In Fig. 2, AC network access by rectifier bridge BR1 full-wave rectification, is filtered into DC B UCK voltage through C3,
UC2842 chip U passes through resistance between VCC and BUCK and charges, and reaches starting voltage conditions, the output end OUT of UC2842 chip U
PWM wave is exported, when Q conducting, DC B UCK voltage, by C4, circuit is connected in transformer T, Q, R14, when Q shutdown, direct current
BUCK voltage passes through T, and DC B UCK voltage is reduced to required band-type brake supplying DC voltage by D3, C4 forming circuit, forms floating ground type
Decompression DC output voltage.
In feed circuit, U4 samples BUCK and COM both end voltage, adjusts the 1 of U3, the electric current that 2 feet flow through, when BUCK with
COM voltage increases, and the 1 of U3,2 feet flow through electric current increase, and the 3 of U3,4 foot electric currents increase, and the pressure drop at the both ends R21 increases, the COMP of U
End voltage is lower, and reduces driving duty ratio, to reduce BUCK and COM both end voltage, realizes pressure stabilizing.As BUCK and COM voltage
It reduces, the 1 of U3,2 feet flow through electric current reduction, and the 3 of U3,4 foot electric currents reduce, and the pressure drop at the both ends R21 reduces, the end the COMP voltage of U
It gets higher, increases the driving duty ratio of Q, to increase BUCK and COM both end voltage, realize that band-type brake supply voltage is stablized.
Use above specific case is illustrated the present invention, is merely used to help understand the present invention, not to limit
The system present invention.For those skilled in the art, according to the thought of the present invention, can also make several simple
It deduces, deform or replaces.
Claims (10)
1. a kind of band-type brake power supply characterized by comprising
Switching Power Supply, for giving AC rectification to band-type brake coil power supply at reduced output voltage after direct current, and to the direct current of output
Electricity carries out feedback regulation, stablizes the direct current of output；
Overvoltage crowbar, for providing overvoltage protection to band-type brake coil；
Detection circuit, for detecting the energized state of band-type brake coil.
2. band-type brake power supply as described in claim 1, it is characterised in that further include:
Circuit for controlling electricity turning controls signal for band-type brake based on the received, and control band-type brake coil is powered or power-off.
3. band-type brake power supply as claimed in claim 2, which is characterized in that the circuit for controlling electricity turning includes:
The first transistor；
First isolation circuit, for received band-type brake control signal to be carried out isolation conversion, the band-type brake control signal after conversion is defeated
The on-off of the first transistor is controlled to the first transistor out；The output end of first isolation circuit and the control electrode of the first transistor
Connection；
The first transistor is connected with band-type brake coil, by the on-off of itself control conducting between band-type brake coil and Switching Power Supply and
It disconnects.
4. band-type brake power supply as claimed in claim 3, which is characterized in that the overvoltage crowbar provides over-voltage to band-type brake coil
Protection includes: when the voltage of Switching Power Supply output is more than preset value, and the on-off by controlling the first transistor makes band-type brake coil
Power-off.
5. band-type brake power supply as described in claim 1, which is characterized in that the detection circuit includes:
Second transistor；
Second isolation circuit, for the voltage signal at band-type brake coil both ends to be carried out isolation conversion, the voltage signal after conversion is defeated
The on-off of second transistor is controlled to second transistor out；The output end of second isolation circuit and the control electrode of second transistor
Connection；
First pole external power supply of second transistor, the second pole ground connection of second transistor；Voltage signal after the conversion
Control under, second transistor is grounded first pole or earth-free by the on-off of itself, to realize first pole
The energized state of voltage signal reaction band-type brake coil.
6. band-type brake power supply as described in claim 1, which is characterized in that the Switching Power Supply includes:
Rectification circuit is used for AC rectification into direct current；
Switching tube；
The voltage of feed circuit, the direct current for exporting to Switching Power Supply is fed back；
Pwm chip is depressured the direct current after rectification for carrying out PWM control by switch tube；According to
The feedback signal of the feed circuit output carries out PWM control to the switching tube, and the voltage for exporting Switching Power Supply keeps steady
It is fixed.
7. band-type brake power supply as claimed in claim 4, which is characterized in that first isolation circuit includes: first resistor, and second
Resistance, 3rd resistor, the 4th resistance, first capacitor and the first optocoupler；One end of first resistor is the input of the first isolation circuit
End, connection band-type brake control signal provide end；The other end of first resistor connects the 1st pin of the first optocoupler, and passes through the first electricity
Hold ground connection, be grounded by second resistance；2nd pin of the first optocoupler is grounded, and the 4th pin of the first optocoupler is connected by 3rd resistor
Connect the first external power supply end；3rd pin of the first optocoupler is the output end of the first isolation circuit, connects the control of the first transistor
One end of pole and the 4th resistance；The output voltage reference edge of the other end connection switch power supply of 4th resistance.
8. band-type brake power supply as claimed in claim 4, which is characterized in that the overvoltage crowbar includes: the 5th resistance, and the 6th
Resistance, the 7th resistance, the second capacitor, the first zener diode and third transistor；One end of 5th resistance is overvoltage protection electricity
The input terminal on road, the output end of connection switch power supply, the other end of the 5th resistance connect one end of the 6th resistance, the second capacitor
The cathode of one end and the first zener diode；One end of anode the 7th resistance of connection of first zener diode and third transistor
Control electrode；The output end of the extremely overvoltage crowbar of the first of third transistor, connects the control electrode of the first transistor；Third
Second pole of transistor, the other end of the 6th resistance, the other end of the second capacitor and the 7th resistance the other end be all connected with switch
The output voltage reference edge of power supply.
9. band-type brake power supply as claimed in claim 5, which is characterized in that second isolation circuit includes: the 8th resistance, and the 9th
Resistance, the tenth resistance, eleventh resistor, twelfth resistor, thirteenth resistor, the second zener diode and the second optocoupler；8th
One end of resistance is the input terminal of the second isolation circuit, connects one end of band-type brake coil, the other end connection the 9th of the 8th resistance
The cathode of one end of resistance and the second zener diode；The other end of 9th resistance connects the 1st pin and the tenth of the second optocoupler
One end of resistance；2nd pin of the second optocoupler and the other end of the tenth resistance are all connected with the other end of band-type brake coil；Second optocoupler
The 4th pin pass through eleventh resistor connect the second external power supply end, twelfth resistor one end；The other end of twelfth resistor
Connect the first pole of second transistor；3rd pin of the second optocoupler is the output end of the second isolation circuit, connects second transistor
Control electrode and thirteenth resistor one end；The other end of thirteenth resistor is grounded.
10. band-type brake power supply as described in claim 1, which is characterized in that the Switching Power Supply is BUCK type topological structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910649940.6A CN110350806A (en) | 2019-07-18 | 2019-07-18 | A kind of band-type brake power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910649940.6A CN110350806A (en) | 2019-07-18 | 2019-07-18 | A kind of band-type brake power supply |
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| Publication Number | Publication Date |
|---|---|
| CN110350806A true CN110350806A (en) | 2019-10-18 |
Family
ID=68178738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910649940.6A Pending CN110350806A (en) | 2019-07-18 | 2019-07-18 | A kind of band-type brake power supply |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111769752A (en) * | 2020-08-04 | 2020-10-13 | 长春汇通光电技术有限公司 | Band-type brake control circuit and elevator control system |
| GB2615371A (en) * | 2022-02-08 | 2023-08-09 | Lester Control Systems Ltd | Lift control |
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| CN111769752A (en) * | 2020-08-04 | 2020-10-13 | 长春汇通光电技术有限公司 | Band-type brake control circuit and elevator control system |
| GB2615371A (en) * | 2022-02-08 | 2023-08-09 | Lester Control Systems Ltd | Lift control |
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Application publication date: 20191018 |