WO2020103480A1

WO2020103480A1 - Elevator braking control device and method

Info

Publication number: WO2020103480A1
Application number: PCT/CN2019/097012
Authority: WO
Inventors: 肖中良; 陈晓东; 唐其伟; 仲兆峰; 张仕昭
Original assignee: 日立楼宇技术（广州）有限公司
Priority date: 2018-11-20
Filing date: 2019-07-22
Publication date: 2020-05-28
Also published as: CN109264517A

Abstract

Disclosed are an elevator braking control device and method. The elevator braking control device comprises a safety brake power supply circuit (110), a brake control circuit (120) and an elevator main unit (130), wherein the elevator main unit (130) comprises a brake (131), and the safety brake power supply circuit (110) and the brake control circuit (120) are configured to be connected to an elevator main control system (140); and a first end of the brake control circuit (120) is connected to a power supply output end of the safety brake power supply circuit (110), and a second end of the brake control circuit (120) is connected to the brake (131) of the elevator main unit (130). The elevator braking control device and method can realize elevator braking control based on the safety brake power supply circuit and the brake control circuit, and improve the flexibility of elevator braking control.

Description

Elevator brake control device and method

This application requires the priority of the Chinese patent application with the application date of November 20, 2018 and the application number of 201811384827.1. The entire content of this application is incorporated by reference in this application.

Technical field

The present application relates to the technical field of elevators, for example, to an elevator brake control device and method.

Background technique

Usually, the normal stop or emergency stop of the elevator is achieved by disconnecting the motor and brake circuit. When the motor power supply is disconnected or the driving waveform is cancelled, the motor stops running, and the brake circuit is disconnected, and the power supply braking function is activated. That is, when the brake circuit is powered off, the electromagnetic force disappears, and the brake shoe component is quickly under the action of the spring force pressure Press the brake surface to form the brake, so that the motor remains in the braking state. It can be seen that the stop of the motor and the closing of the brake together guarantee the safety of the elevator.

In the related art, cutting off the power supply of the motor and brake circuit mainly depends on the contactor. The contactor contact is connected in series to the motor and brake power supply circuit, and the contactor coil is connected in series between the elevator safety circuit and the elevator main control system. Regardless of whether the elevator safety circuit is disconnected or the elevator main control system is disconnected, the contactor coil will be de-energized, the contactor contact will be disconnected, and the motor and brake circuit will be de-energized. It can be seen that the on-off control of the motor and brake circuit depends on the contactor in the elevator. If the contactor fails, the elevator motor and brake cannot be controlled, reducing the flexibility of elevator brake control.

Summary of the invention

The present application provides an elevator brake control device and method, which can realize elevator brake control based on a safety brake power supply circuit and a brake control circuit, and improve the flexibility of elevator brake control.

An embodiment provides an elevator brake control device, including: a safety brake power circuit, a brake control circuit, and an elevator host, the elevator host including a brake, the safety brake power circuit, and the brake control circuit Set to connect with the elevator main control system; wherein, the first end of the brake control circuit is connected to the power output of the safety brake power supply circuit, and the second end of the brake control circuit is connected to the brake The safety brake power circuit is configured to output a power supply signal to the brake control circuit according to the power enable signal output by the elevator main control system to supply power to the brake control circuit; the brake control A circuit configured to generate a current according to the brake control enable signal output by the elevator main control system and the power supply signal output by the safety brake power supply circuit, so that the brake is in a released state; the brake control circuit also When detecting a short-circuit fault, a control fault signal corresponding to the short-circuit fault is fed back to the elevator main control system to trigger the output of the elevator main control system to turn off the enable signal, so that the brake is in a released state The enable signal includes the power enable signal and the brake control enable signal.

An embodiment also provides an elevator brake control method, which is applied to the elevator brake control device. The method includes: a safety brake power circuit sends a brake control circuit to the brake control circuit according to the power enable signal of the elevator main control system Output power supply signal; the brake control circuit generates current according to the brake control enable signal of the elevator main control system and the power supply signal, so that the brake of the elevator host is released; when the brake control circuit detects When a short-circuit fault occurs, a control fault signal corresponding to the short-circuit fault is fed back to the elevator main control system to trigger the output of the elevator main control system to turn off the enable signal, so that the brake is in a released state, wherein, The enable signal includes the power enable signal and the brake control enable signal.

BRIEF DESCRIPTION

1 is a structural block diagram of an elevator brake control device according to an embodiment of the present application;

2 is a connection schematic diagram of a safety brake power supply circuit and a brake control circuit in an embodiment of the present application;

3 is a schematic structural diagram of an elevator brake control device in an embodiment of the present application;

4 is a schematic structural diagram of an elevator brake control device in an embodiment of the present application;

5 is a schematic structural diagram of an elevator brake control device in an embodiment of the present application;

6 is a schematic structural diagram of another elevator brake control device in an embodiment of the present application;

7 is a schematic structural diagram of yet another elevator brake control device in an embodiment of the present application;

8 is a flowchart of steps of an elevator braking control method in an embodiment of the present application.

detailed description

Referring to FIG. 1, FIG. 1 shows a structural block diagram of an elevator brake control device of this embodiment. The elevator brake control device includes: a safety brake power supply circuit 110, a brake control circuit 120, and an elevator host 130. The elevator host 130 may include a brake and a motor. The safety brake power supply circuit 110 and the brake control circuit 120 are provided To connect with the elevator main control system 140. Wherein, the first end of the brake control circuit 120 is connected to the power output end of the safety brake power supply circuit 110, and the second end of the brake control circuit 120 is connected to the brake of the elevator host 130. The safety brake power circuit 110 is configured to output a power supply signal to the brake control circuit 120 according to the power enable signal EN1 output by the elevator main control system 140 to supply power to the brake control circuit 120. The brake control circuit 120 is configured to generate current according to the brake control enable signal EN2 output by the elevator main control system 140 and the power supply signal output by the safety brake power supply circuit 110, so that the brake is in a released state; When detecting a short-circuit fault, the elevator main control system 140 feeds back the control fault signal FB1 corresponding to the short-circuit fault to trigger the elevator main control system 140 to turn off the output of the enable signal, so that the brake is in a released state. The enable signal includes the power enable signal EN1 and the brake control enable signal EN2.

In this embodiment, the elevator main control system 140 can output a power enable signal EN1 to the safety brake power circuit 110 to trigger the safety brake power circuit 110 to output a power supply signal to the brake control circuit 120 to supply power to the brake control circuit 120. Therefore, the brake control circuit 120 can generate a current according to the brake control enable signal EN2, so that the brake of the elevator host 130 is in a released state to ensure the normal operation of the elevator. If the brake control circuit 120 detects a short-circuit fault, it can generate a corresponding control fault signal FB1 for the short-circuit fault, and can feedback the control fault signal FB1 to the elevator main control system 140, so that the elevator main control system 140 is turned off The output of the power-off enable signal, such as the output of the power-off enable signal EN1, causes the safety brake power supply circuit 110 to stop supplying power to the brake control circuit 120, which realizes the power-off of the brake control circuit 120 and can also turn off the brake The brake control enable signal EN2 turns off the brake control circuit 120, so that the brake control circuit 120 stops generating current, so that the brake is in a released state, so that the brake holds the motor and the elevator is braked.

This embodiment controls the on and off of the safety brake power supply circuit 110 and the brake control circuit 120 in the elevator brake control device through the enable signal, thereby realizing the control of the brake of the elevator host 130, and solving the elevator in the related art The on-off control of the motor and brake circuit depends on the contactor in the elevator, that is, the problem that the elevator motor and brake cannot be controlled due to the failure of the contactor in the related art is solved, and the flexibility of elevator brake control is improved .

This embodiment realizes the brake control of the elevator through the safety brake power supply circuit 110 and the brake control circuit 120 in the elevator brake control device, and eliminates the contact in the brake circuit in the related art without reducing the safety of the elevator , That is, the brake contactor and running contactor in the elevator system of the related art are eliminated, thereby avoiding the problem of contactor failure caused by the frequent high current cutoff of the contactor contact in the elevator system, thus solving the problem of contactor failure The problem of elevator brake failure is ensured, and the brake control effect of the elevator is guaranteed, thereby improving the safety of the elevator and ensuring the safe use of the elevator.

The elevator main control system 140 in this embodiment may output a power enable signal EN1 to the safety brake power circuit 110 in the elevator brake control device according to the elevator operation requirements to trigger the safety brake power circuit 110 to enable according to the power The signal EN1 outputs a power supply signal to the brake control circuit 120 to supply power to the brake control circuit 120; the elevator main control system 140 in this embodiment may also output the brake control enable to the brake control circuit 120 according to the elevator operation requirements The signal EN2 enables the brake control circuit 120 to generate current according to the brake control enable signal EN2 and the power supply signal output by the safety brake power supply circuit 110, so that the brake in the elevator host 130 is in a released state.

On the basis of the above embodiment, as shown in FIG. 2, the safety brake power supply circuit 110 includes a power drive circuit module 111, a switching transformer module 112 and a power relay module 113. The first end of the power drive circuit module 111 is connected to the power relay module 113, the second end of the power drive circuit module 111 is connected to the switching transformer module 112, and the output end of the switching transformer module 112 is connected to the Narration brake control circuit 120. The power drive circuit module 111 is configured to output a power control signal to the power relay module 113 according to the received power enable signal EN1, so that the power relay module 113 is in a closed state, and the power drive circuit module 111 further Set to output a power driving signal to the switching transformer module 112 according to the received power enable signal EN1 to drive the switching transformer module 112 to supply power to the brake control circuit 120, so that the brake control circuit 120 can The brake control enable signal EN2 generates a current to control the brake of the elevator host to be released and ensure that the elevator can operate normally.

In an embodiment, the safety brake power supply circuit 110 may further include a power rectification and filtering module 114 and a power short detection module 115. The first end of the power rectification and filtering module 114 is connected to the power relay module 113, and the second end of the power rectification and filtering module 114 is connected to the switching transformer module 112. The first end of the power short circuit detection module 115 is connected to the power rectification and filtering module 114, and the second end of the power short circuit detection module 115 is connected to the elevator main control system 140.

The power rectification and filtering module 114 can be configured to filter the power signal input to the safety brake power supply circuit 110, and can transmit the filtered output signal to the switching transformer module 112, so that the switching transformer module 112 can be filtered according to The obtained output signal outputs a power supply signal to the brake control circuit 120 to supply power to the brake control circuit 120. In an embodiment, when the power relay module 113 is in the closed state, the power rectification and filtering module 114 can access the power signal through the closed power relay module 113, and can filter the connected power signal, and can filter The obtained output signal is transmitted to the switching transformer module 112, so that the switching transformer module 112 can output a power supply signal to the brake control circuit 120 according to the filtered output signal to supply power to the brake control circuit 120.

The power short circuit detection module 115 is configured to detect a short circuit fault, and feed back the power fault signal corresponding to the short circuit fault to the elevator main control system 140 to trigger the elevator main control system 140 to turn off the enable signal Output. For example, in the case where the safety brake power supply circuit 110 includes a switch tube, the power short circuit detection module 115 can determine whether the safety brake power supply circuit 110 has a short-circuit fault by detecting whether the switch tube is short-circuited, and can detect a short-circuit fault At this time, a corresponding power failure signal FB2 is generated, and the power failure signal FB2 is fed back to the elevator main control system 140, so that the elevator main control system 140 turns off the output of the enable signal. In an embodiment, the power supply short-circuit detection module 115 can also detect the abnormality of the switch by monitoring the on-off status of the switch, so that a corresponding power failure signal FB2 can be generated based on the abnormal condition of the switch and fed back to the elevator Master control system 140.

In this embodiment, as shown in FIG. 3, the switching transformer module 112 includes a power output switch tube unit 1121, a transformer T, and a secondary rectification and filtering unit 1123. The first end of the power output switch tube unit 1121 is connected to the output end of the power rectifier filter module 114 and the power short circuit detection module 115, and the second end of the power output switch tube unit 1121 is connected to the On the primary side, and the control end of the power output switch tube unit 1121 is connected to the power driving circuit module 111. The input terminal of the secondary rectifying and filtering unit 1123 is connected to the secondary side of the transformer T, and the output terminal of the secondary rectifying and filtering unit 1123 is connected to the brake control circuit 120. The power output switch tube unit 1121 is configured to generate a power output signal according to the power driving signal output by the power driving circuit module 111 and the output signal of the power rectifying and filtering module 114. The transformer T is configured to generate an output power signal according to the power output signal. The secondary rectification and filtering unit 1123 is configured to rectify and filter the output power signal to obtain a power supply signal, and output the power supply signal to the brake control circuit 120.

After receiving the power enable signal EN1 of the elevator main control system 140, the power drive circuit module 111 can output a power drive signal to the power output switch unit 1121 to drive the power output switch unit 1121 according to the power rectification and filtering module 114 The output signal generates a power output signal. The power output switch unit 1121 can transmit the generated power output signal to the transformer T, so that the transformer T can generate an output power signal according to the power output signal and output it to the secondary rectifying and filtering unit 1123. The secondary rectifying and filtering unit 1123 rectifies and filters the output power signal output by the transformer T to obtain a power supply signal, and outputs the power supply signal to the brake control circuit 120, so that the brake control circuit 120 can generate a control brake based on the power supply signal The current of 131 is used to control the brake 131 to be released to ensure that the elevator can run normally.

The safety brake power supply circuit 110 in this embodiment can achieve adjustable output. For example, multiple voltage output schemes can be realized through voltage reference, or pulse width modulation (PWM) can also be implemented through the elevator main control system 140. The chopping control realizes the adjustable output of the brake power supply. In addition, the brake control circuit 120 can realize both non-chopping timing control and PWM chopping control.

In one embodiment, the power supply driving circuit module 111 may include a PWM controller through which the power supply enable signal EN1 is sequentially controlled to achieve different braking control effects to meet the braking requirements of different elevators . In an embodiment, the power supply driving circuit module 111 may further include other circuit units, such as a voltage closed loop, which may be connected to the output of the secondary rectification and filtering unit 1123, and may give the received voltage The signal is transmitted to the PWM controller, so that after receiving the power enable signal EN1, the PWM controller can output a corresponding power drive signal to the power output switch unit 1121 according to the voltage given signal.

In this embodiment, both the power supply strength excitation switching and the output adjustment can be completed by the safety brake power supply circuit 110. When the elevator is powered on, the power supply drive circuit module 111 can output power control to the relay K0 as the power supply relay module 113 The signal is used to close the relay K0, that is, the control relay K0 is in a closed state, so that the commercial power can be input to the power rectification and filtering module 114 through the relay K0 as a power signal of the safety brake power supply circuit 110. When the elevator opens, the elevator main control system 140 can monitor the state of the electrical safety device, and can control the brake control enable signal EN2 of the brake control circuit 120 according to the state of the electrical safety device to turn on in advance. After a preset time delay, the elevator main control system 140 can control the internal switch of the power supply to turn on through the power enable signal EN1. For example, the power output switch tube unit 1121 in the switch transformer module 112 is closed, so that the switch transformer module 112 Output a constant power supply signal to the brake control circuit 120 to supply power to the brake control circuit 120, and then output a strong excitation current corresponding to the brake, so that the brake control circuit (ie, the brake circuit) enters the strong excitation phase, with a delay of 1 second or After 2 seconds, the maintenance current is automatically output. After the power output current is established, the safety brake power supply circuit 110 and the brake control circuit 120 can respectively transmit the feedback signal corresponding to the opening state of the switch tube to the elevator safety controller to notify the elevator main control system 140 through the elevator safety controller After the brake is released, the elevator can run.

When the elevator brakes normally, the elevator main control system 140 can control the power enable signal EN1 to be turned off in advance, so that the safety brake power circuit 110 is disconnected, such as disconnecting the DC / DC converter switch in the brake power circuit Drive to realize the grid blocking of the safety brake power supply circuit 110, that is, to disconnect the power output switch unit 1121 in the switching transformer module 112, so that the residual current of the brake circuit passes through the secondary rectification filter unit 1123 in the safety brake power supply circuit 110 Slow release; after delaying for a preset time, the elevator main control system 140 can control the brake control enable signal EN2 to turn off, so that the residual current of the brake circuit is quickly released through the freewheel circuit in the brake control circuit 120, thereby turning off The power supply is enabled, that is, the output current of the power supply is turned off. After the output current of the power supply is turned off, the safety brake power supply circuit 110 and the over-brake control circuit 120 can feed back the switch off state to the elevator safety controller to notify the elevator main control system 140 to complete the brake through the elevator safety controller Close the gate to stop the elevator.

During the emergency braking of the elevator, the elevator main control system 140 can detect that the electrical safety device is disconnected through the safety controller, and can trigger the elevator safety controller to issue an emergency braking command, and can also disconnect the power enable signal EN1 and the brake The control enable signal EN2 causes the safety brake power supply circuit 110 and the brake control circuit 120 to be turned off almost simultaneously, so that the brake circuit residual current can be quickly released through the freewheel circuit in the brake control circuit 120. After the output current of the power supply is turned off, the safety brake power supply circuit 110 and the over-brake control circuit 120 can respectively feedback the switch-off state of the switch to the elevator safety controller to notify the elevator main control system 140 of the emergency shutdown of the brake through the elevator safety period Brake, the elevator brakes urgently.

When a short-circuit fault occurs in the brake power supply, such as when a short-circuit fault occurs in the switch tube of the safety brake power supply circuit 110, the safety brake power supply circuit 110 can detect the short-circuit failure information through the PWM controller and can generate it according to the short-circuit failure phenomenon Corresponding power failure signal FB2, and can feed back the power failure signal FB2 to the elevator safety controller, so that the elevator safety controller can report the elevator main engine brake circuit safety failure to the elevator main control system 140 based on the power failure signal FB2 to trigger the elevator The main control system 140 issues an emergency braking command, so that the emergency signal of the elevator can be realized by turning off the enable signal EN2 of the brake control circuit 120, and the restart of the elevator is prohibited.

As the safety circuit of the elevator, the electrical safety device may include the electrical safety switch and the electronic switch in the elevator, such as the shaft safety switch, hall / car door lock safety switch, car position sensor and door zone sensor. These electrical safety switches and electronic switches can be connected to the elevator safety controller, so that the elevator safety controller can collect the status of each electrical safety switch and each electronic switch, and can feedback to the elevator main control system 140, so that the elevator master The control system 140 processes according to the state of each electrical safety switch and electronic switch in the electrical safety device. For example, multiple electronic switches and electrical safety switches in an electrical safety device are connected in parallel, that is, the safety circuit structure is set to a parallel structure, thereby reducing the action delay caused by the series structure and making the elevator timing more reasonable.

The brake control circuit 120 in this embodiment may include one or more switch tubes, and the actual design may consider an integrated design with the safety brake power supply circuit 110.

In an embodiment, as shown in FIG. 4, the brake control circuit 120 includes: a control driving module 121, a delay relay module 122 and a switch tube module 123. The first output end of the control drive module 121 is connected to the control end of the switch tube module 123, and the second output end of the control drive module 121 is connected to the first end of the delay relay module 122. The first end of the switch tube module 123 is connected to the power output end of the safety brake power circuit 110, and the second end of the switch tube module 123 is connected to the brake 131 and the second end of the delay relay module 122 end. The control driving module 121 is configured to receive the brake control enable signal EN2 and output a relay control signal to the delay relay module 122 according to the brake control enable signal EN2 to control the delay The working state of the relay module 122, the control driving module 121 is further configured to output a control driving signal to the control end of the switch tube module 123 according to the brake control enable signal EN2 to control the switch tube module 123 to enter Closed. The switch tube module 123 is configured to transmit the power supply signal output by the safety brake power supply circuit 110 to the brake coil 1311 of the brake 131 to cause the brake coil 1311 to generate current. The delay relay module 122 may be composed of one or more relays.

In an embodiment, the relay K1 included in the delay relay module 122 may be in a normally closed state, so that the elevator is in a stopped state. When the elevator opens, the elevator main control system 140 can transmit the brake control enable signal EN2 to the control drive module 121 in the brake control circuit 120, so that the control drive module 121 outputs a relay control signal to the delay relay module 122. In order to open the delay relay module 122, the working state of the delay relay module 122 is set to the off state, so that the elevator can run. In addition, the control drive module 121 can output a control drive signal to the control end of the switch tube module 123 to control the switch tube module 123 to enter a closed state, so that the power supply signal output by the safety brake power supply circuit 110 is transmitted to the brake of the brake 131 The coil 1311 causes the holding coil 1311 to generate current. When the switch tube module 123 is in the off state, for example, after the switch tube in the switch tube module 123 is opened, the brake control circuit 120 is opened, and the brake coil 1311 cannot be made based on the power supply signal output by the safe brake power supply circuit 110 Electric current is generated, and the brake 131 is de-energized and enters the released state.

In an embodiment, the switch tube module 123 in the brake control circuit 120 may include only one switch tube, and the switch tube may not participate in the chopper control. The switch tube is only equivalent to the switch participating in the brake circuit on-off control. In an embodiment, after the brake control enable signal EN2 is transmitted to the control end of the switch as the switch module 123, the switch can be closed, so that the brake control circuit 120 can be based on the output of the safe brake power supply circuit 110 The power supply signal outputs a strong excitation current of the brake 131, so that the brake 131 finishes opening and enters a released state, thereby enabling the elevator to run. When the switch tube as the switch tube module 123 is opened, the brake control circuit 120 is opened, and the brake control circuit 120 cannot output the strong excitation current of the brake 131 based on the power supply signal output by the safe brake power supply circuit 110, and the brake 131 is broken Power up and enter the release state to realize elevator braking.

The elevator brake control device in this embodiment includes two parts of the safety brake power supply circuit 110 and the brake control circuit 120. The elevator brake control device adopts a differentiated dual-channel structure design to realize the brake circuit on-off control, improve Flexibility of elevator brake control. In an embodiment, the safety brake power supply circuit 110 can realize the on-off control of the power supply through the externally input power enable signal EN1, and the brake control circuit 120 can realize the safety brake power supply circuit through the brake control enable signal EN2 The on-off control at the output side of 110 improves the safety of the elevator brake control circuit 120.

In an embodiment, the brake control circuit 120 may be provided with a short-circuit detection circuit, and the on-off state of the switch tube can be monitored in real time by the short-circuit detection circuit, so that an abnormality of any switch tube in the brake control circuit 120 can be detected Situation, and generate the corresponding control fault signal FB1 to feed back to the elevator main control system 140, so that the elevator main control system 140 can turn off the output of the power enable signal EN1 and the brake control enable signal EN2 based on the control fault signal FB1.

In an embodiment, as shown in FIGS. 1 and 4, the brake control circuit 120 further includes a brake control short-circuit detection module 124 and a freewheel circuit module 125. The first end of the brake control short-circuit detection module 124 is connected to the first end of the switch tube module 123, and the second end of the brake control short-circuit detection module 124 is connected to the second end of the switch tube module 123 Connected, and the output of the brake control short-circuit detection module 124 is connected to the elevator main control system 140. The first end of the freewheeling circuit module 125 is connected to the first end of the holding brake coil 1311 and the second end of the switch tube module 123, and the second end of the freewheeling circuit module 125 is connected to the holding brake The second end of the coil 1311 and the power output end of the safety brake power supply circuit 110. The brake control short-circuit detection module 124 is configured to detect a short-circuit fault of the switch tube module 123 and transmit a control fault signal FB1 corresponding to the short-circuit fault to the elevator main control system 140 to trigger the elevator main control The system 140 turns off the output of the brake control enable signal EN2, so that the delay relay module 122 is in a closed state. The holding brake coil 1311 is configured to release current through the freewheel circuit module 125 when the switch tube module 123 is turned off.

In actual processing, the power supply circuit 110 of the safety brake can adjust the output, and can choose a constant output, that is, it does not participate in the power supply strong and weak excitation switching and the output adjustable function. The switch tube module 123 in the brake control circuit 120 is implemented by using two switch tube units to improve the safety of the brake control circuit 120. Each switch tube unit may be composed of one or more switch tubes. In an embodiment, an insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, IGBT) can be used as a switch in the brake control circuit 120, and the safety level is higher.

For example, the brake control circuit 120 can implement chopping control through a switch tube unit. The switch tube unit can use a freewheeling circuit without internal resistance to achieve strong and weak excitation switching and output adjustable functions without requiring high chopping. Frequency, and the on-off control of the brake 131 circuit can be implemented by another switch tube unit. For example, another switch tube unit may only implement on-off control, and the delay time of the switch tube unit may be turned off to adjust the release time and noise of the brake 131. In an embodiment, the two switch tube units in the brake control circuit 120 can be controlled by the elevator main control system 140 respectively.

As shown in FIG. 5, the switch tube module 123 includes a first switch tube unit Q1 and a second switch tube unit Q2. The first end of the first switch tube unit Q1 is connected to the first power output end of the safety brake power supply circuit 110, and the second end of the first switch tube unit Q1 is connected to the first end of the brake coil 1311 At the end, the control end of the first switch tube unit Q1 is connected to the first output end of the control drive module 121. The first end of the second switch tube unit Q2 is connected to the second power output end of the safety brake power supply circuit 110, and the second end of the second switch tube unit Q2 is connected to the second end of the brake coil 1311 Terminal, the control terminal of the second switch tube unit Q2 is connected to the second output terminal of the control drive module 121. The control drive module 121 is configured to receive the brake control enable signal EN2 of the elevator main control system 140 and output the first control to the control end of the first switch tube unit Q1 according to the brake control enable signal EN2 A drive signal to control the first switch tube unit Q1 to enter a closed state; the control drive module 121 is further configured to output a first switch to the control terminal of the second switch tube unit Q2 according to the brake control enable signal EN2 Two control driving signals to control the second switch tube unit Q2 to enter a closed state.

The power drive circuit module 111 may include a PWM controller 1111 and a voltage closed loop 1112, which may be connected to the output of the secondary rectification and filtering unit 1123, and may transmit the received voltage reference signal to the PWM control After receiving the power enable signal EN1, the PWM controller 1111 can output a corresponding power drive signal to the power output switch unit 1121 according to the voltage given signal.

In an embodiment, as shown in FIG. 5, the freewheel circuit module 125 includes a first freewheel circuit 1251 and a second freewheel circuit 1252. The first end of the first freewheeling circuit 1251 is connected to the second end of the first switch tube unit Q1 and the first end of the holding brake coil 1311, and the second end of the first freewheeling circuit 1251 is connected The second end of the second switch tube unit Q2 and the second end of the holding brake coil 1311. The holding brake coil 1311 is configured to release current through the first freewheeling circuit 1251 when at least one of the first switch tube unit Q1 and the second switch tube unit Q2 is turned off. The first end of the second freewheeling circuit 1252 is connected to the first end of the first switch tube unit Q1 and the first power output terminal of the safety brake power supply circuit 110, and the second freewheeling circuit 1252 The second end is connected to the second end of the second switch tube unit Q2 and the second end of the brake coil 1311. The brake coil 1311 is further configured to release current through the second freewheeling circuit 1252 when the second switch tube unit Q2 is turned off.

In this embodiment, the third end of the second freewheeling circuit 1252 is connected to the first end of the second switch tube unit Q2 and the second power output end of the safety brake power supply circuit 110, the second The fourth end of the freewheeling circuit 1252 is connected to the second end of the first switch tube unit Q1 and the first end of the holding brake coil 1311. The holding brake coil 1311 is further configured to release current through the second freewheeling circuit 1252 when the first switch tube unit Q1 is turned off.

For example, under the condition that the output of the safety brake power supply circuit 110 is constant, the elevator brake control device may implement the alternate chopping scheme through the switch tubes in the brake control circuit 120, such as the alternate chopping scheme through the two switch tube units. When the elevator is powered on, the power drive circuit module 111 can output a power control signal to the relay K0 as the power relay module 113 to close the relay K0, that is, the control relay K0 is in a closed state, so that the commercial power can be input to the power rectifier through the relay K0 The filtering module 114 is used as a power signal of the safety brake power supply circuit 110; and the relay K1 as the delay relay module 122 may be in a normally closed state, so that the elevator is in a stopped state.

The brake control enable signal EN2 includes a first brake enable signal EN2.1 and a second brake enable signal EN2.2. When the elevator opens, the elevator main control system 140 can monitor the status of the electrical safety device and can According to the state of the electrical safety device, the first brake enable signal EN2.1 and the second brake enable signal EN2.2 are opened in advance, and the relay K1 is opened, so that the relay K1 is in the off state; after a preset delay, The elevator main control system 140 can control the power enable signal EN1 to turn on, so that the internal switch tube of the power supply is turned on, such as the switch tube in the switching transformer module 112 is in a closed state, and then the safety brake power supply circuit 110 outputs a constant voltage, so that the elevator The brake circuit has entered the strong excitation phase. After the output current of the power supply is established, the safety brake power supply circuit 110 and the brake control circuit 120 can respectively feedback the opening state of the switch tube to the elevator safety controller to control the safety brake power supply circuit 110 or the brake through the elevator safety controller The open state of the switch tube in the circuit 120 is forwarded to the elevator main control 120, or the open state of the switch tube in the safety brake power supply circuit 110 and the brake control circuit 120 is simultaneously forwarded to the elevator main control system through the elevator safety controller 140, so that the elevator main control system 140 can be processed according to the opening state of the switch in the safety brake power circuit 110 or the brake control circuit 120, or the elevator main control system 140 can be controlled according to the safety brake power circuit 110 and the brake at the same time The switch in the circuit 120 is turned on for processing. After a delay of 1s or 2s, the elevator main control system 140 can control one of the switch tube units of the brake control circuit 120 through the brake control enable signal EN2 to achieve alternate chopping control, such as the first brake enable signal EN2.1 controls the first switch tube unit Q1 of the brake control circuit 120 to realize chopping control, so that the brake circuit (ie, the brake circuit) enters the maintenance phase, and the elevator brake is opened, so that the elevator can run.

When the elevator brakes normally, the elevator main control system 140 can control the power enable signal EN1 to be turned off in advance, and then can turn off any switch tube unit in the brake control circuit 120 by controlling the brake control enable signal EN2. Make the residual current of the brake circuit slowly release through the freewheeling circuit of the switch tube unit that has been turned off, and after a preset time delay, the other one of the brake control circuit 120 can be turned off by the power enable signal EN1 The switch tube unit makes the residual current of the brake quickly release through the freewheeling circuit.

For example, after the power supply enable signal EN1 is turned off, the elevator main control system 140 can control the first brake enable signal EN2.1 to be turned off to turn off the first switch tube unit Q1 of the brake control circuit 120 so that the brake The residual current of the circuit is slowly released through the freewheeling circuit of the first switch tube unit Q1 in the brake control circuit 120, that is, the residual current of the brake circuit is released through the first freewheeling circuit 1251; after a preset time delay, the first The second brake enable signal EN2.2 enables the residual current of the brake circuit to be quickly released through the freewheel circuit of the second switch tube unit Q2 in the brake control circuit 120, that is, the residual current of the brake circuit is released through the second freewheel circuit 1252 . After the output current of the power supply is turned off, the safety brake power supply circuit 110 and the brake control circuit 120 can respectively feed back the off state of the switch tube to the elevator main control system 140 to complete the brake closing and realize the elevator stop.

During the emergency braking of the elevator, the elevator main control system 140 can detect that the electrical safety device is disconnected through the safety controller, and can trigger the elevator safety controller to issue an emergency braking command, and can also disconnect the power enable signal EN1, the first The brake enable signal EN2.1 and the second brake enable signal EN2.2 enable the safety brake power supply circuit 110 and the brake control circuit 120 to be turned off almost simultaneously, that is, the two switches in the brake control circuit 120 The tube units are cut off, so that the residual current of the brake circuit can be quickly released by the freewheel circuit module in the brake control circuit 120. For example, the residual current of the brake circuit is quickly released by the first freewheel circuit 1251 in the brake control circuit 120 freed. After the output current of the power supply is turned off, the safety brake power supply circuit 110 and the brake control circuit 120 can respectively feedback the off state of the switch tube to the elevator safety controller to notify the brake of the elevator main control system 140 through the elevator safety controller The emergency brake closes, the elevator brakes urgently, and the K1 relay can be delayed to close, ensuring that the brake is in a safe stop state.

In an embodiment, as shown in FIG. 6, the switch tube module 123 includes a first switch tube unit Q1 and a second switch tube unit Q2, and the freewheel circuit module 125 includes a first freewheel circuit 1251. The first end of the first switch tube unit Q1 is connected to the second end of the second switch tube unit Q2, and the second end of the first switch tube unit Q1 is connected to the first end of the holding brake coil 1311, The control terminal of the first switch tube unit Q1 is connected to the first output terminal of the control drive module 121. The first end of the second switch tube unit Q2 is connected to the first power output terminal of the safety brake power supply circuit 110, and the control end of the second switch tube unit Q2 is connected to the second output of the control drive module 121 end. The first end of the first freewheeling circuit 1251 is connected to the second end of the first switch tube unit Q1 and the first end of the holding brake coil 1311, and the second end of the first freewheeling circuit 1251 is connected The second end of the brake coil 1311 and the second power output end of the safety brake power supply circuit 110. The control drive module 121 is configured to receive the brake control enable signal EN2 of the elevator main control system 140 and output the first to the control terminal of the first switch tube unit Q1 according to the brake control enable signal EN2 Controlling a drive signal to control the first switch tube unit Q1 to enter a closed state, the control drive module 121 is further configured to output to the control terminal of the second switch tube unit Q2 according to the brake control enable signal EN2 The second control driving signal is used to control the second switch tube unit Q2 to enter a closed state.

The freewheel circuit module 125 in this embodiment may further include the second freewheel circuit 1252. The first end of the second freewheeling circuit 1252 is connected to the first end of the first switching transistor unit Q1 and the second end of the second switching transistor unit Q2, and the second end of the second freewheeling circuit 1252 Is connected to the second end of the brake coil 1311 and the second power output end of the safety brake power supply circuit 110. The holding brake coil 1311 is configured to release current through the second freewheeling circuit 1252 when the second switch tube unit Q2 is turned off.

In this embodiment, the brake control enable signal EN2 includes a first brake enable signal EN2.1 and a second brake enable signal EN2.2, and the control drive module 121 includes a first control drive unit 1211 and a second control drive unit 1212. The brake control short-circuit detection module 124 includes a first short-circuit detection unit 1241, a first diode D1, a second short-circuit detection unit 1242, and a second diode D2.

The first output end of the first control drive unit 1211 is connected to the control end of the first switch tube unit Q1, and the second output end of the first control drive unit 1211 is connected to the first end of the delay relay module 122 end. The first control drive unit 1211 is configured to receive the first brake enable signal EN2.1 of the elevator main control system 140, and to the first switch tube according to the first brake enable signal EN2.1 The control terminal of the unit Q1 outputs a control drive signal to control the first switch tube unit Q1 to enter a closed state, and the first control drive unit 1211 is further configured to send a signal to the control unit according to the first brake enable signal EN2.1 The delay relay module 122 outputs a relay control signal to control the working state of the delay relay module 122.

The output terminal of the second control drive unit 1212 is connected to the control terminal of the second switch tube unit Q2. The second control drive unit 1212 is configured to receive the second brake enable signal EN2.2 of the elevator main control system 140, and to the second switch tube according to the second brake enable signal EN2.2 The control terminal of the unit Q2 outputs a control driving signal to control the second switch tube unit Q2 to enter a closed state.

The first end of the first short-circuit detection unit 1241 is connected to the first end of the first switch tube unit Q1 through the first diode D1, and the second end of the first short-circuit detection unit 1241 is connected to all The second terminal of the first switch tube unit Q1 is connected, and the output terminal of the first short-circuit detection unit 1241 is connected to the elevator main control system 140. The first short-circuit detection unit 1241 is configured to detect a short-circuit fault of the first switch tube unit Q1, and transmit a short-circuit fault signal corresponding to the first switch tube unit Q1 to the elevator main control system 140 to trigger the elevator master The control system 140 turns off the output of the enable signal.

The first end of the second short-circuit detection unit 1242 is connected to the first end of the second switch tube unit Q2 through the second diode D2, and the second end of the second short-circuit detection unit 1242 is connected to all The second terminal of the second switch tube unit Q2 is connected, and the output terminal of the second short-circuit detection unit 1242 is connected to the elevator main control system 140. The second short-circuit detection unit 1242 is configured to detect a short-circuit fault of the second switch tube unit Q2, and transmit a short-circuit fault signal corresponding to the second switch tube unit Q2 to the elevator main control system 140 to trigger the elevator master The control system 140 turns off the output of the enable signal.

In an embodiment, under the condition that the output of the brake power supply is adjustable, the two switch tube units of the brake control circuit 120 may only implement on-off control. When the elevator is powered on, the power drive circuit module 111 can output a power control signal to the relay K0 as the power relay module 113 to close the relay K0, that is, the control relay K0 is in a closed state, so that the commercial power can be input to the power supply through the relay K0 The rectifying and filtering module 114 serves as the power signal of the safety brake power supply circuit 110; and, the relay K1 as the delay relay module 122 may be in a normally closed state, so that the elevator is in a stopped state.

When the elevator is opened, the elevator main control system 140 can monitor the state of the electrical safety device, and can control the first brake enable signal EN2.1 and the second brake enable signal EN2.2 to open in advance according to the state of the electrical safety device. And open the relay K1, so that the relay K1 is in the off state; after a preset delay, the elevator main control system 140 can control the power enable signal EN1 to turn on, and continue to send out the voltage given signal, so that the power supply internal switch tube is turned on For example, the switching tube in the switching transformer module 112 is in a closed state, so that the safety brake power supply circuit 110 outputs a constant voltage, so that the elevator brake circuit enters a strong excitation stage. After the output current of the power supply is established, the safety brake power supply circuit 110 and the brake control circuit 120 can respectively feedback the opening state of the switch tube to the elevator safety controller to control the safety brake power supply circuit 110 or the brake through the elevator safety controller The open state of the switch in the circuit 120 is forwarded to the elevator main control system 140, or the open state of the switch in the safety brake power supply circuit 110 or the brake control circuit 120 is forwarded to the elevator main control system 140 through the elevator safety controller , So that the elevator main control system 140 can be processed according to the opening state of the switch in the safety brake power circuit 110 or the brake control circuit 120, or the elevator main control system 140 can also be based on the safety brake power circuit 110 or the brake control circuit 120 The switch in the open state is processed. After a delay of 1s or 2s, the elevator main control system 140 can control one of the switch tube units of the brake control circuit 120 through the brake control enable signal EN2 to achieve alternate chopping control, such as the first brake enable signal EN2.1 controls the first switch tube unit Q1 of the brake control circuit 120 to realize chopping control, so that the brake circuit (ie, the brake circuit) enters the maintenance phase, and the elevator brake is opened, so that the elevator can run.

When the elevator brakes normally, the elevator main control system 140 can control the power enable signal EN1 of the brake to turn off in advance, and then can turn off any switch in the brake control circuit 120 by controlling the brake control enable signal EN2 Tube unit, so that the residual current of the brake circuit is slowly released through the freewheeling circuit of the single switch tube unit in the brake control circuit 120, and after a preset time delay, the brake control circuit 120 is turned off by the power enable signal EN1 In the other switch tube unit, the residual current of the brake circuit is quickly released through the freewheeling circuit. For example, after the power supply enable signal EN1 is turned off, the elevator main control system 140 can control the first brake enable signal EN2.1 to be turned off to turn off the first switch tube unit Q1 of the brake control circuit 120 so that the brake The residual current of the circuit is slowly released through the freewheeling circuit of the first switch tube unit Q1 in the brake control circuit 120, that is, the residual current of the brake circuit is released through the first freewheeling circuit 1251; after a preset time delay, it can be turned off The second brake enable signal EN2.2 enables the brake residual current to be quickly released through the freewheeling circuit of the second switching transistor unit Q2 in the brake control circuit 120, that is, the residual current of the brake circuit is released through the second freewheeling circuit 1252 . After the output current of the power supply is turned off, the safety brake power supply circuit 110 and the over-brake control circuit 120 can respectively feedback the switch-off state of the switch to the elevator main control system 140 to complete the brake closing and realize the elevator stop.

During the emergency braking of the elevator, the elevator main control system 140 can detect that the electrical safety device is disconnected through the safety controller, and can trigger the elevator safety controller to issue an emergency braking command, and can also disconnect the power enable signal EN1, the first The brake enable signal EN2.1 and the second brake enable signal EN2.2 enable the safety brake power supply circuit 110 and the brake control circuit 120 to be turned off almost simultaneously. The two switch tube units in the brake control circuit 120 are cut off, so that the residual current of the brake circuit can be quickly released through the freewheel circuit in the brake control circuit 120, such as the residual current of the brake circuit through the brake control circuit The first freewheeling circuit 1251 in 120 is quickly released. After the output current of the power supply is turned off, the safety brake power supply circuit 110 and the over-brake control circuit 120 can respectively feed back the switch off state to the elevator safety controller to notify the elevator main control system 140 of the brake through the elevator safety controller Emergency closing, the elevator brakes urgently, and relay K1 can be closed for a long time to ensure that the brake is in a safe stop state.

In an embodiment, the first switching transistor unit Q1 in the brake control circuit 120 can implement chopping control. The first switching transistor unit Q1 can use a freewheeling circuit with an internal resistance of 0Ω to achieve strong and weak excitation switching and output To adjust the function, the first switching transistor unit Q1 does not need a higher chopping frequency. The second switch tube unit Q2 in the brake control circuit 120 may only implement on-off control. By delaying the second switch tube unit Q2 to be turned off, the release time and noise of the brake 131 can be adjusted.

In other embodiments, the brake control circuit 120 may further include other circuit modules, such as a filter circuit module, etc .; the filter circuit module may include a filter capacitor and a filter inductor. For example, a filter inductor L can be added between the first switch transistor unit Q1 and the second switch transistor unit Q2 to serve as a filter circuit module in the brake control circuit 120. As shown in FIG. 7, the first filter inductor L The terminal may be connected to the second terminal of the first switching transistor unit Q1, and the second terminal of the filter inductor L may be connected to the first terminal of the second switching transistor unit Q2.

For another example, the brake control circuit 120 may use an inductor and a capacitor as a filter circuit module, and the inductor may be connected in series between the first switch tube unit Q1 and the second switch tube unit Q2. For example, the first end of the inductor may be connected to the first The second end of a switching transistor unit Q1, the second end of the inductor can be connected to the first terminal of the second switching transistor unit Q2; and, the first end of the capacitor can be connected to the second end of the inductor and the second switching transistor unit Q2 The first end and the second end of the capacitor may be connected to at least one of the second end of the brake coil 1311 and the reference ground (GND) of the brake control circuit 120.

In summary, the safety brake power supply circuit 110 and the brake control circuit 120 included in the elevator brake control device of this embodiment can implement chopping control to facilitate integration with different elevator systems. Among them, the safety brake power supply circuit 110 can adopt a constant output, can also achieve multiple modes of output through voltage reference, and can also realize adjustable output through the PWM chopper control of the elevator main control. For example, the power supply driving circuit module 111 may include a PWM controller through which the power supply enable signal EN1 is sequentially controlled, and can be combined with different implementations of the output of the safety brake power supply circuit 110 to achieve different braking Control effects to meet the braking needs of different elevator systems, and a wide range of applications.

In addition, the elevator brake control device of this embodiment adds a redundant relay K0 on the input side of the safety brake power supply, and a delay relay K1 on the output side of the brake control circuit, which further improves the safety of the brake control circuit 120.

This embodiment also provides an elevator brake control method that can be applied to an elevator brake control device of an elevator system. The elevator brake control method may include the elevator brake control device mentioned in any of the above embodiments .

Referring to FIG. 8, FIG. 8 shows a flowchart of steps of an elevator braking control method in this embodiment. The elevator brake control method can be applied to an elevator brake control device, and the elevator brake control method can include the following steps:

In S810, the safety brake power supply circuit outputs a power supply signal to the brake control circuit according to the power enable signal of the elevator main control system.

In S820, the brake control circuit generates a current according to the brake control enable signal of the elevator main control system and the power supply signal, so that the brake of the elevator host is in a released state.

In S830, when the brake control circuit detects a short-circuit fault, a control fault signal corresponding to the short-circuit fault is fed back to the elevator main control system to trigger the output of the elevator main control system shutdown enable signal So that the brake is in a released state.

Wherein, the enable signal includes the power enable signal and the brake control enable signal.

In this embodiment, the safety brake power supply circuit includes a power drive circuit module, a switching transformer module, a power relay module, and a power rectification and filtering module. The safety brake power circuit outputs the power supply signal to the brake control circuit according to the power enable signal of the elevator main control system, which may include: receiving the power enable signal of the elevator main control system through the power drive circuit module, and according to the received power The enable signal outputs a power control signal to the power relay module so that the power relay module is in a closed state, and outputs a power drive signal to the switching transformer module to drive the switching transformer module according to the power rectification and filtering The output signal of the module supplies power to the brake control circuit.

In an embodiment, the brake control circuit includes a control drive module, a delay relay module, and a switch tube module. The brake control circuit generates current according to the brake control enable signal of the elevator main control system and the power supply signal, so that the brake of the elevator host is in a released state, which may include: receiving the brake control Power signal, and output a relay control signal to the delay relay module according to the brake control enable signal to control the working state of the delay relay module, and output a control drive to the control end of the switch tube module Signal to control the switch tube module to enter a closed state; through the switch tube module, the power supply signal output by the safety brake power supply circuit is transmitted to the brake coil of the brake, so that the brake coil generates current.

In an embodiment, the brake control circuit may further include a brake control short circuit detection module and a freewheel circuit module. When the brake control circuit detects a short-circuit fault, the control failure signal corresponding to the short-circuit fault is fed back to the elevator main control system to trigger the output of the elevator main control system to turn off the enable signal, so that the brake of the elevator host is in The release state includes: detecting a short circuit fault of the switch tube module through the brake control short circuit detection module, and transmitting a control fault signal corresponding to the short circuit fault to the elevator main control system to trigger the elevator main control The system turns off the output of the enable signal, so that the delay relay module is in a closed state; when the switch tube module is turned off, the brake coil releases current through the freewheeling circuit module, so that the brake is released status.

In this embodiment, the switch tube module includes a first switch tube unit and a second switch tube unit. The brake control circuit generates current according to the brake control enable signal of the main control system of the brake elevator and the power supply signal, so that the brake of the elevator host is in a released state. It may include: receiving the brake control enable signal through the control drive module, and outputting a first control drive signal to the control end of the first switch tube unit according to the brake control enable signal to control the first A switch tube unit enters a closed state, and a second control drive signal is output to the control end of the second switch tube unit to control the second switch tube unit to enter a closed state.

In an embodiment, the freewheel circuit module includes a first freewheel circuit and a second freewheel circuit. When the switch tube module is turned off, the holding coil releases the current through the freewheel circuit module, which may include: when at least one of the first switch tube unit and the second switch tube unit is turned off, the The holding coil releases current through the first freewheeling circuit; when the second switch tube unit is turned off, the holding coil releases current through the second freewheeling circuit.

In an embodiment, when the switch tube module is turned off, the holding brake coil releases current through the freewheel circuit module, and may further include: the holding brake coil is turned off when the first switch tube unit is turned off, The current is released through the second freewheeling circuit.

In an embodiment, the switch tube module includes a first switch tube unit and a second switch tube unit, and the freewheel circuit module includes a first freewheel circuit. The brake control circuit generates a current according to the brake control enable signal of the elevator main control system and the power supply signal, so that the brake of the elevator host is in a released state, which may include: receiving brake control control through the control drive module An enabling signal and output a first control driving signal to the control end of the first switch tube unit according to the brake control enable signal to control the first switch tube unit to enter a closed state, and to the first The control end of the second switch tube unit outputs a second control drive signal to control the second switch tube unit to enter a closed state. When the switch tube module is turned off, the holding brake coil releases current through the freewheel circuit module, which may include: when at least one of the first switch tube unit and the second switch tube unit is turned off, the The brake coil releases current through the first freewheeling circuit.

The freewheeling circuit module further includes the second freewheeling circuit; the holding brake coil releases current through the freewheeling circuit module when the switch tube module is turned off, and may further include: the holding brake coil is in When the second switch tube unit is turned off, the current is released through the second freewheeling circuit.

In an embodiment, the brake control enable signal includes a first brake enable signal and a second brake enable signal. The control drive module includes a first control drive unit and a second control drive unit. The brake control short-circuit detection module includes a first short-circuit detection unit, a first diode, a second short-circuit detection unit and a second diode.

The above control driving module receives the brake control enable signal of the elevator main control system, and outputs the first control drive signal to the control end of the first switch tube unit according to the brake control enable signal to control The first switch tube unit enters a closed state, and outputting a second control drive signal to the control end of the second switch tube unit to control the second switch tube unit to enter a closed state may include: The first control drive unit receives the first brake enable signal and outputs a control drive signal to the control end of the first switch tube unit according to the first brake enable signal to control the first switch tube unit Enter the closed state, and output a relay control signal to the delay relay module to control the working state of the delay relay module; through the second control drive unit, receive the second brake enable signal, and according to The second brake enable signal outputs a control driving signal to the control end of the second switch tube unit to control the second switch tube unit to enter a closed state.

Through the brake control short-circuit detection module, a short-circuit fault of the switch tube module is detected, and a control fault signal corresponding to the short-circuit fault is transmitted to the elevator main control system to trigger the elevator main control system to turn off the The output of the enable signal includes: detecting the short-circuit fault of the first switch tube unit through the first short-circuit detection unit, and transmitting the short-circuit fault signal corresponding to the first switch tube unit to the elevator main control system to trigger The elevator main control system turns off the output of the enable signal; the second short-circuit detection unit detects the short-circuit fault of the second switch tube unit, and transmits the short-circuit fault signal corresponding to the second switch tube unit to the elevator The main control system to trigger the elevator main control system to turn off the output of the enable signal.

In this embodiment, the safety brake power supply circuit further includes a power supply rectification filter module and a power supply short-circuit detection module. The above method may further include: detecting a short circuit fault through a power short circuit detection module, and feeding back a power fault signal corresponding to the short circuit fault to the elevator main control system to trigger the elevator main control system to turn off the enable signal Output.

In an embodiment, the switching transformer module includes: a power output switching tube unit, a transformer and a secondary rectification and filtering unit. The safety brake power supply circuit outputs a power supply signal to the brake control circuit according to the power enable signal of the elevator main control system, including: the power output switch tube unit outputs the power drive signal according to the power drive circuit module and the power supply rectification filter module The output signal generates a power output signal; the transformer generates an output power signal according to the power output signal; the secondary rectifier filter unit rectifies and filters the output power signal to obtain a power supply signal, and outputs the power supply signal to Brake control circuit.

It should be noted that, for the purpose of simple description, the method embodiments are all expressed as a series of action combinations, but those skilled in the art should know that the embodiments of the present application are not limited by the sequence of actions described Because, according to the embodiments of the present application, some steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification belong to some embodiments of the present application, and the actions involved are not necessarily required by the embodiments of the present application.

The embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments may refer to each other.

Those skilled in the art should understand that the embodiments of the present application may be provided as methods, devices, or computer program products. Therefore, the embodiments of the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the embodiments of the present application may take the form of computer program products implemented on one or more computer usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.

The embodiments of the present application are described with reference to at least one of the flowcharts and block diagrams of the method, terminal device (system), and computer program product of the embodiments of the present application. It should be understood that each process in the flowchart and a combination of multiple processes in the flowchart can be implemented by computer program instructions, or each process in the block diagram and a combination of multiple processes in the block diagram can be implemented by computer program instructions, or by a computer The program instructions simultaneously implement each flow in the flow chart and the combination of multiple flows in the flow chart, as well as each flow in the block diagram and multiple flows in the block diagram. These computer program instructions can be provided to the processor of a general-purpose computer, special-purpose computer, embedded processing machine, or other programmable data processing terminal device to produce a machine so that the instructions executed by the processor of the computer or other programmable data processing terminal device A device capable of realizing the functions specified in the flow chart one flow or a plurality of flows, or simultaneously realizing the flow chart one flow or a plurality of flows and the block diagram one block or a plurality of blocks.

These computer program instructions may also be stored in a computer readable memory that can guide a computer or other programmable data processing terminal device to work in a predictive manner, so that the instructions stored in the computer readable memory produce a manufactured product including an instruction device, which The instruction device implements the function specified in the flowchart one flow or multiple flows or the block diagram one block or multiple blocks, or simultaneously implements the flowchart one flow or multiple flows and the block diagram one block or multiple The function specified in the box.

These computer program instructions can also be loaded on a computer or other programmable data processing terminal device, so that a series of operation steps are performed on the computer or other programmable terminal device to generate computer-implemented processing, so that the computer or other programmable terminal device The instructions executed on the steps provide steps that can implement the functions specified in one or more steps in the flowchart, or steps that implement the functions specified in one or more blocks in the block diagram, or both Steps in a flow or multiple flows and functions specified in a block or blocks in a block diagram.

Finally, it should also be noted that in this application, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these There is any such actual relationship or order between entities or operations. Moreover, the terms "include", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device that includes a series of elements includes not only those elements, but also those not explicitly listed The other elements listed may also include elements inherent to such processes, methods, articles or terminal equipment. Without further restrictions, the elements defined by the sentence "include one ..." do not exclude that there are other identical elements in the process, method, article, or terminal device that includes the elements.

Claims

An elevator brake control device includes: a safety brake power supply circuit, a brake control circuit and an elevator host, the elevator host includes a brake, the safety brake power supply circuit and the brake control circuit are set to Control system connection;

Wherein, the first end of the brake control circuit is connected to the power output of the safety brake power supply circuit, and the second end of the brake control circuit is connected to the brake;

The safety brake power circuit is configured to output a power supply signal to the brake control circuit according to the power enable signal output by the elevator main control system to supply power to the brake control circuit;

The brake control circuit is configured to generate current according to the brake control enable signal output by the elevator main control system and the power supply signal output by the safety brake power supply circuit, so that the brake is in a released state; The brake control circuit is further configured to feed back a control fault signal corresponding to the short-circuit fault to the elevator main control system when detecting a short-circuit fault to trigger the output of the elevator main control system shutdown enable signal to make the brake In the released state, the enable signal includes the power enable signal and the brake control enable signal.
The elevator brake control device according to claim 1, wherein the safety brake power supply circuit includes a power drive circuit module, a switching transformer module, a power relay module, and a power rectification filter module;

Wherein, the first end of the power drive circuit module is connected to the power relay module, the second end of the power drive circuit module is connected to the switching transformer module, and the output end of the switching transformer module is connected to the Brake control circuit connection;

The first end of the power rectification and filtering module is connected to the power relay module, and the second end of the power rectification and filtering module is connected to the switching transformer module;

The power drive circuit module is connected to the elevator main control system and is configured to output a power control signal to the power relay module according to the received power enable signal, so that the power relay module is in a closed state, so The power supply driving circuit module is further configured to output a power supply driving signal to the switching transformer module according to the received power enabling signal, so as to drive the switching transformer module according to the output signal of the power rectifying and filtering module as the support Gate control circuit power supply.
The elevator brake control device according to claim 1, wherein the brake control circuit includes a control drive module, a delay relay module, and a switch tube module;

The first output end of the control drive module is connected to the control end of the switch tube module, and the second output end of the control drive module is connected to the first end of the delay relay module;

The first end of the switch tube module is connected to the power output end of the safety brake power supply circuit, and the second end of the switch tube module is respectively connected to the brake of the elevator host and the second of the delay relay module End connection

The control drive module is connected to the elevator main control system and is configured to receive the brake control enable signal, and output a relay control signal to the delay relay module according to the brake control enable signal to To control the working state of the delay relay module, the control drive module is further configured to output a control drive signal to the control end of the switch tube module according to the brake control enable signal to control the switch tube module to enter Closed state

The switch tube module is configured to transmit the power supply signal output by the safety brake power circuit to the brake coil of the brake, so that the brake coil generates current.
The elevator brake control device according to claim 3, wherein the brake control circuit further includes a brake control short-circuit detection module and a freewheel circuit module;

The first end of the brake control short-circuit detection module is connected to the first end of the switch tube module, the second end of the brake control short-circuit detection module is connected to the second end of the switch tube module, and the The output end of the brake control short-circuit detection module is connected to the elevator main control system;

The first end of the freewheeling circuit module is connected to the first end of the holding brake coil and the second end of the switch tube module respectively, and the second end of the freewheeling circuit module is connected to the holding brake coil respectively The second end of the is connected to the power output end of the safety brake power supply circuit;

The brake control short-circuit detection module is configured to detect a short-circuit fault of the switch tube module, and transmit the control fault signal corresponding to the short-circuit fault to the elevator main control system to trigger the elevator main control The system shuts off the output of the brake control enable signal, and the brake control short-circuit detection module is also set to close the delay relay module when a short-circuit fault of the switch tube module is detected;

The holding brake coil is set to release current through the freewheeling circuit module when the switch tube module is turned off.
The elevator brake control device according to claim 4, wherein the switch tube module includes a first switch tube unit and a second switch tube unit;

The first end of the first switch tube unit is connected to the first power output end of the safety brake power supply circuit, and the second end of the first switch tube unit is connected to the first end of the brake coil, The control end of the first switch tube unit is connected to the first output end of the control drive module;

The first end of the second switch tube unit is connected to the second power output end of the safety brake power supply circuit, and the second end of the second switch tube unit is connected to the second end of the brake coil, The control end of the second switch tube unit is connected to the second output end of the control drive module;

The control drive module is configured to receive the brake control enable signal and output a first control drive signal to the control end of the first switch tube unit according to the brake control enable signal to control the The first switch tube unit enters a closed state, and the control drive module is further configured to output a second control drive signal to the control end of the second switch tube unit according to the brake control enable signal to control the second The switch tube unit enters the closed state.
The elevator brake control device according to claim 5, wherein the freewheel circuit module includes a first freewheel circuit and a second freewheel circuit;

The first end of the first freewheeling circuit is respectively connected to the second end of the first switch tube unit and the first end of the holding brake coil, and the second end of the first freewheeling circuit is respectively connected to the The second end of the second switch tube unit is connected to the second end of the brake coil; the brake coil is set when at least one of the first switch tube unit and the second switch tube unit is turned off , Releasing current through the first freewheeling circuit;

The first end of the second freewheeling circuit is respectively connected to the first end of the first switch tube unit and the first power output end of the safety brake power supply circuit, and the second end of the second freewheeling circuit Connected to the second end of the second switch tube unit and the second end of the holding brake coil; the holding brake coil is set to pass through the second switch tube unit when the second switch tube unit is turned off The freewheeling circuit releases current.
The elevator brake control device according to claim 6, wherein the third end of the second freewheeling circuit is respectively connected to the first end of the second switch tube unit and the second end of the safety brake power supply circuit The output end of the power supply is connected, and the fourth end of the second freewheeling circuit is respectively connected to the second end of the first switch tube unit and the first end of the holding brake coil;

The holding brake coil is further configured to release current through the second freewheeling circuit when the first switch tube unit is turned off.
The elevator brake control device according to claim 4, wherein the switch tube module includes a first switch tube unit and a second switch tube unit, and the freewheel circuit module includes a first freewheel circuit;

The first end of the first switch tube unit is connected to the second end of the second switch tube unit, the second end of the first switch tube unit is connected to the first end of the holding brake coil, the The control end of the first switch tube unit is connected to the first output end of the control drive module;

The first end of the second switch tube unit is connected to the first power output end of the safety brake power supply circuit, and the control end of the second switch tube unit is connected to the second output end of the control drive module;

The first end of the first freewheeling circuit is respectively connected to the second end of the first switch tube unit and the first end of the holding brake coil, and the second end of the first freewheeling circuit is respectively connected to the The second end of the brake coil is connected to the second power output of the safety brake power circuit;

The control drive module is configured to receive a brake control enable signal and output a first control drive signal to the control end of the first switch tube unit according to the brake control enable signal to control the first switch The tube unit enters a closed state, and the control drive module is further configured to output a second control drive signal to the control end of the second switch tube unit according to the brake control enable signal to control the second switch tube unit Enter the closed state;

The holding brake coil is configured to release current through the first freewheeling circuit when at least one of the first switch tube unit and the second switch tube unit is turned off.
The elevator brake control device according to claim 8, wherein the freewheel circuit module further comprises a second freewheel circuit;

The first end of the second freewheeling circuit is respectively connected to the first end of the first switching tube unit and the second end of the second switching tube unit, and the second end of the second freewheeling circuit is respectively Connected to the second end of the brake coil and the second power output end of the safety brake power supply circuit;

The holding brake coil is also configured to release current through the second freewheeling circuit when the second switch tube unit is turned off.
The elevator brake control device according to any one of claims 5 to 8, wherein the brake control enable signal includes a first brake enable signal and a second brake enable signal, and the control drive module includes A first control drive unit and a second control drive unit, the brake control short-circuit detection module includes a first short-circuit detection unit, a first diode, a second short-circuit detection unit, and a second diode;

The first output end of the first control drive unit is connected to the control end of the first switch tube unit, and the second output end of the first control drive unit is connected to the first end of the delay relay module;

The first control drive unit is configured to receive a first brake enable signal and output a control drive signal to the control end of the first switch tube unit according to the first brake enable signal to control the first A switch tube unit enters a closed state, and the first control drive unit is further configured to output a relay control signal to the delay relay module according to the first brake enable signal to control the operation of the delay relay module status;

The output end of the second control drive unit is connected to the control end of the second switch tube unit;

The second control drive unit is configured to receive a second brake enable signal and output the control drive signal to the control end of the second switch tube unit according to the second brake enable signal to control the The second switch tube unit enters a closed state;

The first end of the first short-circuit detection unit is connected to the first end of the first switch tube unit through the first diode, and the second end of the first short-circuit detection unit is connected to the first switch The second end of the tube unit is connected, and the output end of the first short-circuit detection unit is connected to the elevator main control system;

The first short-circuit detection unit is configured to detect a short-circuit fault of the first switch tube unit and transmit a short-circuit fault signal corresponding to the first switch tube unit to the elevator main control system to trigger the elevator main The control system turns off the output of the enable signal;

The first end of the second short-circuit detection unit is connected to the first end of the second switch tube unit through the second diode, and the second end of the second short-circuit detection unit is connected to the second switch The second end of the tube unit is connected, and the output end of the second short-circuit detection unit is connected to the elevator main control system;

The second short-circuit detection unit is configured to detect a short-circuit fault of the second switch tube unit, and transmit a short-circuit fault signal corresponding to the second switch tube unit to the elevator main control system to trigger the elevator master The control system turns off the output of the enable signal.
The elevator brake control device according to claim 2, wherein the safety brake power supply circuit further includes a power supply rectification filter module and a power supply short-circuit detection module;

The first end of the power rectification and filtering module is connected to the power relay module, and the second end of the power rectification and filtering module is connected to the switching transformer module;

The first end of the power short-circuit detection module is respectively connected to the power rectifier filter module and the switching transformer module, and the second end of the power short-circuit detection module is connected to the elevator main control system;

The power short circuit detection module is configured to detect a short circuit fault, and feed back the power fault signal corresponding to the short circuit fault to the elevator main control system to trigger the elevator main control system to turn off the output of the enable signal.
The elevator brake control device according to claim 11, wherein the switching transformer module includes a power output switching tube unit, a transformer and a secondary rectification and filtering unit;

The first end of the power output switch tube unit is respectively connected to the output end of the power rectifier filter module and the power short circuit detection module, and the second end of the power output switch tube unit is connected to the primary side of the transformer And, the control end of the power output switch tube unit is connected to the power supply driving circuit module;

The input terminal of the secondary rectification and filtering unit is connected to the secondary side of the transformer, and the output terminal of the secondary rectification and filtering unit is connected to the brake control circuit;

The power output switch tube unit is configured to generate a power output signal according to the power drive signal output by the power drive circuit module and the output signal of the power rectifier filter module;

The transformer is configured to generate an output power signal according to the power output signal;

The secondary rectification and filtering unit is configured to rectify and filter the output power signal to obtain a power supply signal output by the safety brake power circuit, and output the power supply signal to the brake control circuit.
An elevator brake control method applied to the elevator brake control device according to any one of claims 1 to 12, the method comprising:

The safety brake power circuit outputs power supply signal to the brake control circuit according to the power enable signal of the elevator main control system;

The brake control circuit generates a current according to the brake control enable signal of the elevator main control system and the power supply signal, so that the brake of the elevator host is released; and

When the brake control circuit detects a short-circuit fault, it feeds back a control fault signal corresponding to the short-circuit fault to the elevator main control system to trigger the output of the elevator main control system shutdown enable signal, so that all The brake is in a released state, wherein the enable signal includes the power supply enable signal and the brake control enable signal.