Band-type brake power supply circuit, band-type brake driver and elevator band-type brake device

Abstract

The invention provides a band-type brake power supply circuit, a band-type brake driver and an elevator band-type brake device.The band-type brake power supply circuit comprises a power supply main loop, a sampling circuit, a first protection circuit, a second protection circuit, a first signal output circuit and a second signal output circuit; the power supply main loop comprises a rectification circuit, a voltage conversion circuit, a first switch circuit and a second switch circuit, and when an abnormal condition occurs, the first protection circuit and the second protection circuit respectively trigger and output a first enable signal and a second enable signal; the first signal output circuit triggers to turn off the first switching circuit and the second switching circuit based on the first enable signal, and the second signal output circuit triggers to turn off the voltage conversion circuit based on the second enable signal, so that the power supply of the band-type brake is cut off, and the band-type brake is switched to a band-type braking state. The band-type brake power supply circuit does not need to be provided with a band-type brake, miniaturization of the band-type brake device is achieved, and the design cost is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of brake control, and in particular relates to a brake power supply circuit, a brake driver and an elevator brake device. Background Art

[0002] In the field of brake power supply, in order to meet safety needs, it is necessary to effectively cut off the power supply of the brake in the event of a fault or accident. For example, in the elevator field, when an elevator fails, in order to prevent the elevator from rushing to the top or squatting to the bottom, it is necessary to promptly and effectively switch the power supply of the brake when the elevator fails, so that the brake is switched to the brake state and brakes the elevator.

[0003] In conventional brake control solutions, the brake power supply is controlled by adding a brake contactor. Due to the large size of the brake contactor, the size of the brake device cannot be further miniaturized. Summary of the invention

[0004] The object of the present invention is to provide a brake power supply circuit, aiming to solve the problem of large volume of traditional brake power supply circuits.

[0005] A first aspect of an embodiment of the present invention provides a brake power supply circuit for outputting a power supply signal to a brake. The brake power supply circuit includes:

[0006] A power main circuit, the power main circuit comprising a rectifier circuit, a voltage conversion circuit and a power output circuit connected in sequence, the power output circuit comprising a first switch circuit and a second switch circuit connected in parallel between the voltage conversion circuit and the holding brake;

[0007] a sampling circuit, connected to the output end of the voltage conversion circuit, the output end of the first switch circuit, the output end of the second switch circuit and the control signal end of the holding brake respectively, and sampling and outputting corresponding first potential signals, second potential signals, third potential signals and fourth potential signals;

[0008] A first protection circuit is connected to the sampling circuit, and the first protection circuit is used to detect the potentials of the first potential signal, the second potential signal and the fourth potential signal, and output a first enable signal when the potentials of the potential signals are not the same;

[0009] A second protection circuit is connected to the sampling circuit, and the second protection circuit is used to detect the potentials of the first potential signal, the third potential signal and the fourth potential signal, and output a second enable signal when the potentials of the potential signals are not the same;

[0010] A first signal output circuit is connected to the first protection circuit and is triggered by the first enable signal to output a first shutdown signal to shut down the first switch circuit and the second switch circuit;

[0011] The second signal output circuit is connected to the second protection circuit, and is triggered by the second enable signal to output a second shutdown signal to shut down the voltage conversion circuit.

[0012] Optionally, the first switch circuit and the second switch circuit are also connected to a main controller, and the main controller is used to output a brake control signal to a control signal terminal of the brake, output a first switch signal to the first switch circuit, and output a second switch signal to the second switch circuit;

[0013] The first protection circuit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a first capacitor, a second capacitor, a third capacitor, a first diode, a first XNOR gate, a second XNOR gate, a first NAND gate, a first inverter and a first optocoupler;

[0014] The first end of the first resistor is used to input the fourth potential signal, the second end of the first resistor is connected to the first input end of the first XNOR gate, the first end of the second resistor is used to input the second potential signal, the second end of the second resistor, the cathode of the first diode, the first end of the third resistor and the second input end of the first XNOR gate are connected, the anode of the first diode is connected to the first end of the fourth resistor, the second end of the fourth resistor is used to input the first analog signal, the second end of the third resistor is grounded, the output end of the first XNOR gate is connected to the first input end of the first NAND gate, the first end of the fifth resistor is used to input the first potential signal, the second end of the fifth resistor is connected to the first input end of the second XNOR gate, the first end of the sixth resistor is used to input the fourth potential signal, the second end of the sixth resistor is connected to the second input end of the second XNOR gate, and the second XNOR gate The output end of is connected to the second input end of the first NAND gate, the output end of the first NAND gate is connected to the first end of the seventh resistor, the second end of the seventh resistor, the first end of the first capacitor and the input end of the first inverter are connected, the second end of the first capacitor is grounded, the output end of the first inverter is connected to the first end of the eighth resistor, the second end of the eighth resistor, the first end of the ninth resistor, the first end of the second capacitor and the anode of the first optocoupler are connected, the second end of the ninth resistor, the second end of the second capacitor and the cathode of the first optocoupler are grounded, the collector of the first optocoupler is connected to the first end of the tenth resistor, the second end of the tenth resistor is connected to the positive voltage end, the emitter of the first optocoupler, the first end of the eleventh resistor and the first end of the third capacitor are connected to form the output end of the first protection circuit, and the second end of the eleventh resistor and the second end of the third capacitor are grounded.

[0015] Optionally, the second protection circuit includes a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a twenty-second resistor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a second diode, a third XNOR gate, a fourth XNOR gate, a second NAND gate, a second inverter, and a second optocoupler;

[0016] The first end of the twelfth resistor is used to input the fourth potential signal, the second end of the twelfth resistor is connected to the first input end of the third XNOR gate, the first end of the thirteenth resistor is used to input the third potential signal, the second end of the thirteenth resistor, the cathode of the second diode, the first end of the fourteenth resistor and the second input end of the third XNOR gate are connected, the anode of the second diode is connected to the first end of the fifteenth resistor, the second end of the fifteenth resistor is used to input the second analog signal, the second end of the fourteenth resistor is grounded, the output end of the third XNOR gate is connected to the first input end of the second NAND gate, the first end of the sixteenth resistor is used to input the first potential signal, the second end of the sixteenth resistor is connected to the first input end of the fourth XNOR gate, the first end of the seventeenth resistor is used to input the fourth potential signal, the second end of the seventeenth resistor is connected to the second input end of the fourth XNOR gate, The output end is connected to the second input end of the second NAND gate, the output end of the second NAND gate is connected to the first end of the eighteenth resistor, the second end of the eighteenth resistor, the first end of the fourth capacitor and the input end of the second inverter are connected, the second end of the fourth capacitor is grounded, the output end of the second inverter is connected to the first end of the nineteenth resistor, the second end of the nineteenth resistor, the first end of the twentieth resistor, the first end of the fifth capacitor and the anode of the second optocoupler are connected, the second end of the twentieth resistor, the second end of the fifth capacitor and the cathode of the second optocoupler are grounded, the collector of the second optocoupler is connected to the first end of the twenty-first resistor, the second end of the twenty-first resistor is connected to the positive voltage end, the emitter of the second optocoupler, the first end of the twenty-second resistor and the first end of the sixth capacitor are connected to form the output end of the second protection circuit, and the second end of the twenty-second resistor and the second end of the sixth capacitor are grounded.

[0017] Optionally, the first signal output circuit includes a first power chip, a first optocoupler circuit and a second optocoupler circuit;

[0018] The power input terminal of the first power chip is connected to the positive power terminal, and the power output terminal of the first power chip is connected to the input terminal of the first optocoupler circuit and the input terminal of the second optocoupler circuit respectively;

[0019] The first optical coupler circuit includes a twenty-third resistor, a twenty-fourth resistor, a twenty-fifth resistor, a seventh capacitor, an eighth capacitor and a third optical coupler;

[0020] The first end of the twenty-third resistor, the first end of the seventh capacitor and the anode of the third optical coupler are connected to form the input end of the first optical coupler circuit, the second end of the twenty-third resistor, the second end of the seventh capacitor and the cathode of the third optical coupler are grounded, the collector of the third optical coupler is connected to the first end of the twenty-fourth resistor, the second end of the twenty-fourth resistor is connected to the positive power supply end, the emitter of the third optical coupler, the first end of the twenty-fifth resistor, the first end of the eighth capacitor are connected to the control end of the first switch circuit, and the second end of the twenty-fifth resistor and the second end of the eighth capacitor are grounded;

[0021] The second optical coupler circuit includes a twenty-sixth resistor, a twenty-seventh resistor, a twenty-eighth resistor, a ninth capacitor, a tenth capacitor and a fourth optical coupler;

[0022] The first end of the twenty-sixth resistor, the first end of the ninth capacitor and the anode of the fourth optocoupler are connected to form the input end of the second optocoupler circuit, the second end of the twenty-sixth resistor, the second end of the ninth capacitor and the cathode of the fourth optocoupler are grounded, the collector of the fourth optocoupler is connected to the first end of the twenty-seventh resistor, the second end of the twenty-seventh resistor is connected to the positive power supply end, the emitter of the fourth optocoupler, the first end of the twenty-eighth resistor, the first end of the tenth capacitor are connected to the control end of the second switch circuit, and the second end of the twenty-eighth resistor and the second end of the tenth capacitor are grounded.

[0023] Optionally, the second signal output circuit includes a second power chip and a driver;

[0024] The power input terminal of the second power chip is connected to the positive power terminal, the power output terminal of the second power chip is connected to the power terminal of the driver, and the driver is used to output a voltage conversion signal to the voltage conversion circuit.

[0025] Optionally, the main power circuit further includes:

[0026] A relay, wherein a switch of the relay is connected in series between the voltage conversion circuit and the first switch circuit and the second switch circuit;

[0027] The brake power supply circuit also includes:

[0028] The third signal output circuit is respectively connected to the coil of the relay, the first protection circuit and the second protection circuit. The third signal output circuit is used to detect the potential of the output signals of the first protection circuit and the second protection circuit, and to cut off the output voltage enable signal to the coil of the relay when the potentials of the two output signals are different, so as to turn off the relay.

[0029] Optionally, the third signal output circuit includes an AND gate, a twenty-ninth resistor, a thirtieth resistor, a thirty-first resistor, an eleventh capacitor, a twelfth capacitor and a fifth optical coupler;

[0030] The first input end of the AND gate is connected to the output end of the first protection circuit, the second input end of the AND gate is connected to the output end of the second protection circuit, the output end of the AND gate, the first end of the twenty-ninth resistor, the first end of the eleventh capacitor and the anode of the fifth optocoupler are connected, the second end of the twenty-ninth resistor, the second end of the eleventh capacitor and the cathode of the fifth optocoupler are grounded, the collector of the fifth optocoupler is connected to the first end of the thirtieth resistor, the second end of the thirtieth resistor is connected to the positive power supply end, the emitter of the fifth optocoupler, the first end of the thirty-first resistor and the first end of the twelfth capacitor are connected to form the signal output end of the third signal output circuit, and the second end of the thirty-first resistor and the second end of the twelfth capacitor are grounded.

[0031] Optionally, the voltage conversion circuit includes a first switch tube, an inductor, a thirteenth capacitor and a third diode;

[0032] The cathode of the third diode, the first end of the thirteenth capacitor and the positive power supply end of the rectifier circuit are connected to form the positive power supply output end of the voltage conversion circuit, the anode of the third diode, the first end of the first switch tube and the first end of the inductor are connected, the second end of the inductor and the second end of the thirteenth capacitor are connected to form the negative power supply output end of the voltage conversion circuit, the second end of the first switch tube is connected to the negative power supply end of the rectifier circuit, and the control end of the first switch tube is respectively connected to the signal end of the main controller and the output end of the second signal output circuit.

[0033] A second aspect of the embodiments of the present invention provides a brake driver, comprising a main controller and the brake power supply circuit as described above, wherein the main controller is connected to the brake power supply circuit.

[0034] A third aspect of the embodiments of the present invention provides an elevator holding brake device, comprising a holding brake and the holding brake driver as described above, wherein the holding brake driver is connected to the holding brake.

[0035] Compared with the prior art, the embodiments of the present invention have the following beneficial effects: the above-mentioned brake power supply circuit includes a power supply main circuit, a sampling circuit, a first protection circuit, a second protection circuit, a first signal output circuit and a second signal output circuit, the power supply main circuit includes a rectifier circuit, a voltage conversion circuit and a first switch circuit and a second switch circuit output in parallel which are connected in sequence, when an abnormal condition occurs in the corresponding power supply in the power supply main circuit or the brake control signal output to the brake brake, the first protection circuit triggers to output a first enable signal, the first signal output circuit triggers to turn off the first switch circuit and the second switch circuit based on the first enable signal, the second protection circuit triggers to output a second enable signal, the second signal output circuit triggers to turn off the voltage conversion circuit based on the second enable signal, thereby cutting off the power supply of the brake brake, and the brake brake switches to the brake brake state, the brake power supply circuit does not need to be provided with a brake brake, and adopts a circuit structure composition, thereby realizing the miniaturization of the brake device and reducing the design cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0037] Figure 1 A schematic diagram of a first structure of a brake power supply circuit provided in an embodiment of the present invention;

[0038] Figure 2 A schematic diagram of the structure of a brake driver provided in an embodiment of the present invention;

[0039] Figure 3 A circuit diagram of a first protection circuit provided by an embodiment of the present invention;

[0040] Figure 4 A circuit diagram of a second protection circuit provided by an embodiment of the present invention;

[0041] Figure 5 A circuit diagram of a first signal output circuit provided by an embodiment of the present invention;

[0042] Figure 6 A schematic diagram of the structure of a second signal output circuit provided by an embodiment of the present invention;

[0043] Figure 7 A circuit diagram of a main power supply circuit 10 provided in an embodiment of the present invention;

[0044] Figure 8 A second structural schematic diagram of a brake power supply circuit provided in an embodiment of the present invention;

[0045] Fig. 9 A circuit diagram of a third signal output circuit provided by an embodiment of the present invention;

[0046] Fig.10 A schematic structural diagram of an elevator brake device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0047] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0049] A first aspect of an embodiment of the present invention provides a brake power supply circuit 100 for outputting a power supply signal to a brake 2, wherein: Fig.10 As shown, the brake 2 is also connected to the main controller 200. When the brake 2 is in the brake release state, the main controller 200 outputs a brake control signal to the brake brake 2 and outputs a corresponding power control signal to the brake power circuit 100. The brake power circuit 100 triggers the output power signal to the brake brake 2 based on the brake control signal. After the brake 2 is powered on and receives the brake control signal, it switches to the brake release state and releases the corresponding module, such as releasing the corresponding component in the elevator. The elevator will not brake, and when an abnormality occurs, the main controller 200 will stop outputting the brake control signal. At the same time, the main controller 200 outputs the corresponding power control signal to the brake power circuit 100, and the brake power circuit 100 stops outputting the power signal. After the brake 2 has no working power and brake control signal, the brake 2 switches to the brake locking mode and brakes the corresponding module, such as the corresponding component in the brake elevator, and the elevator brakes to avoid hitting the top or squatting at the bottom.

[0050] In order to realize automatic detection and power output control, in an optional embodiment, as Figure 1 As shown, the brake power supply circuit 100 includes:

[0051] A power supply main circuit 10, the power supply main circuit 10 comprises a rectifier circuit 11, a voltage conversion circuit 12 and a power supply output circuit which are connected in sequence, and the power supply output circuit comprises a first switch circuit 13 and a second switch circuit 14 which are connected in parallel between the voltage conversion circuit 12 and the holding brake 2;

[0052] The sampling circuit 60 is respectively connected to the output end of the voltage conversion circuit 12, the output end of the first switch circuit 13, the output end of the second switch circuit 14 and the control signal end of the holding brake 2, and samples and outputs the corresponding first potential signal VDC_FB, second potential signal K1_FB, third potential signal K2_FB and fourth potential signal Y2_FB;

[0053] The first protection circuit 20 is connected to the sampling circuit 60, and the first protection circuit 20 is used to detect the potentials of the first potential signal VDC_FB, the second potential signal K1_FB and the fourth potential signal Y2_FB, and output the first enable signal EN1 when the potentials of the potential signals are not the same;

[0054] The second protection circuit 30 is connected to the sampling circuit 60, and the second protection circuit 30 is used to detect the potentials of the first potential signal VDC_FB, the third potential signal K2_FB and the fourth potential signal Y2_FB, and output the second enable signal EN2 when the potentials of the potential signals are not the same;

[0055] The first signal output circuit 40 is connected to the first protection circuit 20 and is triggered by the first enable signal EN1 to output a first shut-down signal to shut down the first switch circuit 13 and the second switch circuit 14;

[0056] The second signal output circuit 50 is connected to the second protection circuit 30 , and is triggered by the second enable signal EN2 to output a second shutdown signal to shut down the voltage conversion circuit 12 .

[0057] In this embodiment, the main power circuit 10 outputs a power signal or stops outputting the power signal to the holding brake 2 based on various control signals.

[0058] Among them, Figure 2 As shown, the first switch circuit 13, the second switch circuit 14 and the voltage conversion circuit 12 are also connected to the main controller 200, and the main controller 200 is used to output a brake control signal to the control signal end of the brake brake 2, output a first switch signal to the first switch circuit 13 and output a second switch signal to the second switch circuit 14, and output a voltage conversion signal to the voltage conversion circuit 12.

[0059] In normal working state, the main controller 200 outputs the corresponding voltage conversion signal to the voltage conversion circuit 12, and the AC power is converted into a DC power after being rectified and output by the rectifier circuit 11. The DC power is stepped down by the voltage conversion circuit 12. At the same time, the main controller 200 outputs the first switch signal and the second switch signal to the first switch circuit 13 and the second switch circuit 14. The first switch circuit 13 and the second switch circuit 14 are turned on, and two power supply signals are output to the brake 2. The two power supply signals constitute redundant power supply to improve power supply reliability. At the same time, the main controller 200 also outputs a brake control signal to the brake 2, and the brake 2 switches to the brake release state and releases the corresponding module, such as releasing the corresponding components in the elevator, and the elevator will not brake.

[0060] At this time, the sampling circuit 60 samples the output voltage of the voltage conversion circuit 12, the output voltage of the first switch circuit 13, the output voltage of the second switch circuit 14, and the output state of the brake control signal, and converts them into corresponding high and low potentials. When the circuits of the brake power supply circuit 100 are normal and the main controller 200 outputs the brake control signal normally, the first potential signal VDC_FB, the second potential signal K1_FB, the third potential signal K2_FB and the fourth potential signal Y2_FB are all high levels. At this time, when the first protection circuit 20 detects that the first potential signal VDC_FB, the second potential signal K1_FB and the fourth potential signal Y2_FB are the same potential, the first protection circuit 20 will not output the first enable signal EN1. Similarly, when the second protection circuit 30 detects that the first potential signal VDC_FB, the third potential signal K2_FB and the fourth potential signal Y2_FB are the same high potential, the second protection circuit 30 will not output the second enable signal EN2.

[0061] The first signal output circuit 40 does not receive the first enable signal EN1, and the first signal output circuit 40 will not output the first shutdown signal to the first switch circuit 13 and the second switch circuit 14. The two switch circuits are normally turned on and off, and when there is a power signal input at the front end, the two switch circuits normally output the power signal to the holding brake 2.

[0062] When the second signal output circuit 50 does not receive the second enable signal EN2, the second signal output circuit 50 will not output the second shutdown signal to the voltage conversion circuit 12. The voltage conversion circuit 12 continues to perform the voltage conversion work normally and outputs the stepped-down voltage signal to the first switch circuit 13 and the second switch circuit 14 at the rear end.

[0063] And when an abnormal state occurs, for example, the first switch circuit 13 is abnormally shut down, at this time, the second potential signal K1_FB is changed to a low level, and the first protection circuit 20 detects that the three potential signals are non-identical signals. At this time, the first protection circuit 20 triggers the output of the first enable signal EN1. After the first signal output circuit 40 receives the first enable signal EN1, it triggers the output of the first shutdown signal to the first switch circuit 13 and the second switch circuit 14, and synchronously shuts down the two switch circuits, thereby cutting off the power supply of the brake 2, and the brake 2 switches to the brake locking mode.

[0064] Similarly, when the second switch circuit 14 is abnormally shut down, at this time, the third potential signal K2_FB is changed to a low level. When the second protection circuit 30 detects that the three potential signals are not the same signals, at this time, the second protection circuit 30 triggers the output of the second enable signal EN2. After the second signal output circuit 50 receives the second enable signal EN2, it triggers the output of the second shutdown signal to the voltage conversion circuit 12. The voltage conversion circuit 12 shuts down and cuts off the output voltage signal to the rear-end switch circuit and the brake 2. The brake 2 switches to the brake locking mode.

[0065] When the voltage conversion circuit 12 works abnormally and no voltage signal is output, the first potential signal VDC_FB is switched to a low level, and the first protection circuit 20 detects that the three potential signals are not the same signals. At this time, the first protection circuit 20 triggers the output of the first enable signal EN1. After receiving the first enable signal EN1, the first signal output circuit 40 triggers the output of the first shutdown signal to the first switch circuit 13 and the second switch circuit 14, and synchronously shuts down the two switch circuits.

[0066] At the same time, when the second protection circuit 30 detects that the three potential signals are not the same signals, the second protection circuit 30 triggers the output of the second enable signal EN2. After the second signal output circuit 50 receives the second enable signal EN2, it triggers the output of the second shutdown signal to the voltage conversion circuit 12. The voltage conversion circuit 12 shuts down and cuts off the output voltage signal to the rear-end switching circuit and the brake 2. The brake 2 switches to the brake locking mode.

[0067] Similarly, when the main controller 200 works abnormally and no brake control signal is output, the fourth potential signal Y2_FB is switched to a low level, the first protection circuit 20 triggers and outputs the first enable signal EN1, the first signal output circuit 40 outputs the first shutdown signal to the first switch circuit 13 and the second switch circuit 14, and the two switch circuits are shut down synchronously. The second protection circuit 30 triggers and outputs the second enable signal EN2, the second signal output circuit 50 outputs the second shutdown signal to the voltage conversion circuit 12, the voltage conversion circuit 12 shuts off and cuts off the output voltage signal to the rear-end switch circuit and the brake 2, and the brake 2 switches to the brake locking mode. Thereby, abnormal protection under normal operation of the elevator can be realized.

[0068] And when the corresponding module is in a stopped working state, for example, the elevator is in a stopped state, the main controller 200 outputs a voltage conversion signal, a first switch signal, and a second switch signal to control the voltage conversion circuit 12 to be turned off, the first switch circuit 13 to be turned off, and the second switch circuit 14 to be turned off, and the main controller 200 stops outputting the brake control signal to the brake 2. At this time, each potential signal is a low potential.

[0069] At this time, the first protection circuit 20 detects that the three potential signals are all low level, the first protection circuit 20 will not output the first enable signal EN1, and the first signal output circuit 40 will not output the first shutdown signal to the first switch circuit 13 and the second switch circuit 14, and the two switch circuits remain in the off state.

[0070] When the second protection circuit 30 detects that the three potential signals are all low level, the second protection circuit 30 does not output the second enable signal EN2 , and the second signal output circuit 50 does not output the second shutdown signal to the voltage conversion circuit 12 . The voltage conversion circuit 12 remains in the shutdown state.

[0071] When an abnormal state occurs, for example, when the voltage conversion circuit 12 works abnormally and outputs a voltage signal, and when the brake 2 abnormally receives a power signal and a brake controller, the first protection circuit 20 and the second protection circuit 30 output the corresponding first enable signal EN1 and second enable signal EN2, and the first signal output circuit 40 outputs the first shutdown signal to the first switch circuit 13 and the second switch circuit 14, and the two switch circuits are shut down synchronously. The second signal output circuit 50 outputs the second shutdown signal to the voltage conversion circuit 12, and the voltage conversion circuit 12 shuts down and cuts off the output voltage signal to the rear-end switch circuit and the brake 2, and the brake 2 switches to the brake lock mode. Thus, abnormal protection can be achieved when the elevator is stopped.

[0072] Among them, the rectifier circuit 11 can adopt the corresponding rectifier bridge BR1, rectifier and other structures, the voltage conversion circuit 12 can adopt the corresponding voltage divider circuit, boost buck circuit, etc., the first switch circuit 13 and the second switch circuit 14 can adopt the corresponding switch devices, the first protection circuit 20 and the second protection circuit 30 can adopt the corresponding logic gate, level detection circuit, etc. In an optional embodiment, as Figure 3 and Figure 4 As shown, the first protection circuit 20 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a first capacitor C1, a second capacitor C2, a third capacitor C3, a first diode D1, a first XNOR gate U1, a second XNOR gate U2, a first NAND gate U3, a first inverter U4 and a first optocoupler U01;

[0073] The first end of the first resistor R1 is used to input the fourth potential signal Y2_FB, the second end of the first resistor R1 is connected to the first input end of the first XOR gate U1, the first end of the second resistor R2 is used to input the second potential signal K1_FB, the second end of the second resistor R2, the cathode of the first diode D1, the first end of the third resistor R3 and the second input end of the first XOR gate U1 are connected, the anode of the first diode D1 is connected to the first end of the fourth resistor R4, the second end of the fourth resistor R4 is used to input the first analog signal Ctr11, the second end of the third resistor R3 is grounded, the output end of the first XOR gate U1 is connected to the first input end of the first NAND gate U3, the first end of the fifth resistor R5 is used to input the first potential signal VDC_FB, the second end of the fifth resistor R5 is connected to the first input end of the second XOR gate U2, the first end of the sixth resistor R6 is used to input the fourth potential signal Y2_FB, the second end of the sixth resistor R6 is connected to the second input end of the second XOR gate U2, and the second The output end of the XNOR gate U2 is connected to the second input end of the first NAND gate U3, the output end of the first NAND gate U3 is connected to the first end of the seventh resistor R7, the second end of the seventh resistor R7, the first end of the first capacitor C1 and the input end of the first inverter U4 are connected, the second end of the first capacitor C1 is grounded, the output end of the first inverter U4 is connected to the first end of the eighth resistor R8, the second end of the eighth resistor R8, the first end of the ninth resistor R9, the first end of the second capacitor C2 and the anode of the first optocoupler U01 are connected, the second end of the ninth resistor R9, the second end of the second capacitor C2 and the cathode of the first optocoupler U01 are grounded, the collector of the first optocoupler U01 is connected to the first end of the tenth resistor R10, the second end of the tenth resistor R10 is connected to the positive voltage end, the emitter of the first optocoupler U01, the first end of the eleventh resistor R11 and the first end of the third capacitor C3 are connected to form the output end of the first protection circuit 20, and the second end of the eleventh resistor R11 and the second end of the third capacitor C3 are grounded.

[0074] In this embodiment, the first enable signal EN1 is at a low level. Under normal working conditions, the first switch circuit 13, the second switch circuit 14, and the voltage conversion circuit 12 are in normal working conditions and output two power supply signals to the brake 2. The main controller 200 also outputs a brake control signal to the brake 2. The brake 2 switches to a brake release state and releases corresponding modules, such as releasing corresponding components in the elevator. The elevator will not brake.

[0075] At this time, the sampling circuit 60 samples the output voltage of the voltage conversion circuit 12, the output voltage of the first switch circuit 13, the output voltage of the second switch circuit 14, and the output state of the brake control signal, and converts them into corresponding high and low potentials. When the circuits of the brake power supply circuit 100 are normal and the main controller 200 outputs the brake control signal normally, the first potential signal VDC_FB, the second potential signal K1_FB, the third potential signal K2_FB and the fourth potential signal Y2_FB are all high levels. At this time, the first XOR gate U1 outputs a high level, the second XOR gate U2 outputs a high level, the first NAND gate U3 outputs a low level, the first inverter U4 outputs a high level, the first optocoupler U01 is turned on and outputs a high level to the first signal output circuit 40, the first signal output circuit 40 is turned off and outputs a first shutdown signal to the first switch circuit 13 and the second switch circuit 14, the two switch circuits are normally turned on and off, and when there is a power signal input at the front end, the two switch circuits normally output the power signal to the brake 2.

[0076] When an abnormal state occurs, at least one of the first potential signal VDC_FB, the second potential signal K1_FB and the fourth potential signal Y2_FB is at a low level. At this time, the first XOR gate U1 and / or the second XOR gate U2 outputs at least one low level, the first NAND gate U3 outputs a high level, the first inverter U4 outputs a low level, and the first optocoupler U01 turns off the first enable signal EN1 that outputs a low level. After receiving the first enable signal EN1, the first signal output circuit 40 triggers the output of the first shutdown signal to the first switch circuit 13 and the second switch circuit 14, and synchronously turns off the two switch circuits, thereby cutting off the power supply of the brake 2, and the brake 2 switches to the brake locking mode.

[0077] At the same time, when only the second switch circuit 14 is needed to control the on-off of the power signal, at this time, the main controller 200 can output the first switch signal to control the first switch circuit 13 to be turned off. At the same time, the main controller 200 can output the first analog signal Ctr11 with a high potential. At this time, the second potential signal K1_FB continues to be a low level. The first analog signal Ctr11 can pull the second input terminal of the first XOR gate U1 to a high potential, and the first analog signal Ctr11 replaces the second potential signal K1_FB when the first switch circuit 13 is working normally, thereby providing a normal potential signal to the first protection circuit 20 when the first switch circuit 13 exits the working state, and completing the single-channel power output.

[0078] And when the corresponding module is in a stopped working state, for example, the elevator is in a stopped state, the main controller 200 outputs a voltage conversion signal, a first switch signal, and a second switch signal to control the voltage conversion circuit 12 to be turned off, the first switch circuit 13 to be turned off, and the second switch circuit 14 to be turned off, and the main controller 200 stops outputting the brake control signal to the brake 2. At this time, each potential signal is a low potential.

[0079] At this time, the first XOR gate U1 outputs a high level, the second XOR gate U2 outputs a high level, the first NAND gate U3 outputs a low level, the first inverter U4 outputs a high level, the first optocoupler U01 is turned on and outputs a high level to the first signal output circuit 40, the first signal output circuit 40 is turned off and outputs the first shutdown signal to the first switch circuit 13 and the second switch circuit 14, the two switch circuits are normally turned on and off, and the two switch circuits remain in the off state.

[0080] At the same time, when only the second switch circuit 14 is needed to control the on-off of the power signal, at this time, the main controller 200 can output the first switch signal to control the first switch circuit 13 to be turned off. At the same time, the main controller 200 can output the low-potential first analog signal Ctr11. At this time, the second potential signal K1_FB is a low level. The first analog signal Ctr11 can pull the second input terminal of the first XOR gate U1 to a low potential, and the first analog signal Ctr11 replaces the second potential signal K1_FB when the first switch circuit 13 is working normally, thereby providing a normal potential signal to the first protection circuit 20 when the first switch circuit 13 exits the working state, and completing the single-channel power output.

[0081] Correspondingly, if Figure 4 As shown, in an optional embodiment, the second protection circuit 30 includes a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19, a twentieth resistor R20, a twenty-first resistor R21, a twenty-second resistor R22, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a second diode D2, a third XNOR gate U5, a fourth XNOR gate U6, a second NAND gate U7, a second inverter U8 and a second optocoupler U02;

[0082] The first end of the twelfth resistor R12 is used to input the fourth potential signal Y2_FB, the second end of the twelfth resistor R12 is connected to the first input end of the third XOR gate U5, the first end of the thirteenth resistor R13 is used to input the third potential signal K2_FB, the second end of the thirteenth resistor R13, the cathode of the second diode D2, the first end of the fourteenth resistor R14 and the second input end of the third XOR gate U5 are connected, the anode of the second diode D2 is connected to the first end of the fifteenth resistor R15, the second end of the fifteenth resistor R15 is used to input the second analog signal Ctr12, the second end of the fourteenth resistor R14 is grounded, the output end of the third XOR gate U5 is connected to the first input end of the second NAND gate U7, the first end of the sixteenth resistor R16 is used to input the first potential signal VDC_FB, the second end of the sixteenth resistor R16 is connected to the first input end of the fourth XOR gate U6, the first end of the seventeenth resistor R17 is used to input the fourth potential signal Y2_FB, and the second end of the seventeenth resistor R17 is connected to the second input end of the fourth XOR gate U6 , the output end of the fourth XNOR gate U6 is connected to the second input end of the second NAND gate U7, the output end of the second NAND gate U7 is connected to the first end of the eighteenth resistor R18, the second end of the eighteenth resistor R18, the first end of the fourth capacitor C4 are connected to the input end of the second inverter U8, the second end of the fourth capacitor C4 is grounded, the output end of the second inverter U8 is connected to the first end of the nineteenth resistor R19, the second end of the nineteenth resistor R19, the first end of the twentieth resistor R20, the first end of the fifth capacitor C5 and the anode of the second optical coupler U02 are connected, the second end of the twentieth resistor R20, the second end of the fifth capacitor C5 and the cathode of the second optical coupler U02 are grounded, the collector of the second optical coupler U02 is connected to the first end of the twenty-first resistor R21, the second end of the twenty-first resistor R21 is connected to the positive voltage end, the emitter of the second optical coupler U02, the first end of the twenty-second resistor R22 and the first end of the sixth capacitor C6 are connected to form the output end of the second protection circuit 30, the second end of the twenty-second resistor R22 and the second end of the sixth capacitor C6 are grounded.

[0083] In this embodiment, the second enable signal EN2 is at a low level. Under normal working conditions, the first switch circuit 13, the second switch circuit 14, and the voltage conversion circuit 12 are in normal working conditions and output two power supply signals to the brake 2. The main controller 200 also outputs a brake control signal to the brake 2. The brake 2 switches to a brake release state and releases corresponding modules, such as releasing corresponding components in the elevator. The elevator will not brake.

[0084] At this time, the sampling circuit 60 samples the output voltage of the voltage conversion circuit 12, the output voltage of the first switch circuit 13, the output voltage of the second switch circuit 14, and the output state of the brake control signal, and converts them into corresponding high and low potentials. When the circuits of the brake power supply circuit 100 are normal and the main controller 200 outputs the brake control signal normally, the first potential signal VDC_FB, the second potential signal K1_FB, the third potential signal K2_FB and the fourth potential signal Y2_FB are all high levels. At this time, the third XOR gate U5 outputs a high level, the fourth XOR gate U6 outputs a high level, the second NAND gate U7 outputs a low level, the second inverter U8 outputs a high level, the second optocoupler U02 is turned on and outputs a high level to the second signal output circuit 50, the second signal output circuit 50 is turned off and outputs the second shutdown signal to the voltage conversion circuit 12, the voltage conversion circuit 12 continues to perform the voltage conversion work normally, and outputs the stepped-down voltage signal to the first switch circuit 13 and the second switch circuit 14 at the rear end.

[0085] When an abnormal state occurs, at least one of the first potential signal VDC_FB, the third potential signal K2_FB and the fourth potential signal Y2_FB is at a low level. At this time, the third XOR gate U5 and / or the fourth XOR gate U6 outputs at least one low level, the second NAND gate U7 outputs a high level, the second inverter U8 outputs a low level, and the second optocoupler U02 turns off the second enable signal EN2 that outputs a low level. After the second signal output circuit 50 receives the second enable signal EN2, it triggers the output of the second shutdown signal to the voltage conversion circuit 12. The voltage conversion circuit 12 turns off and cuts off the output voltage signal to the rear-end switching circuit and the brake 2, and the brake 2 switches to the brake locking mode.

[0086] At the same time, when only the first switch circuit 13 is needed to control the on-off of the power signal, at this time, the main controller 200 can output the second switch signal to control the second switch circuit 14 to turn off. At the same time, the main controller 200 can output the second analog signal Ctr12 with a high potential. At this time, the third potential signal K2_FB continues to be a low level. The second analog signal Ctr12 can pull the second input terminal of the third XOR gate U5 to a high potential, and the second analog signal Ctr12 replaces the third potential signal K2_FB when the second switch circuit 14 is working normally, so that when the second switch circuit 14 exits the working state, a normal potential signal is provided to the second protection circuit 30, and a single-channel power output is completed.

[0087] And when the corresponding module is in a stopped working state, for example, the elevator is in a stopped state, the main controller 200 outputs a voltage conversion signal, a first switch signal, and a second switch signal to control the voltage conversion circuit 12 to be turned off, the first switch circuit 13 to be turned off, and the second switch circuit 14 to be turned off, and the main controller 200 stops outputting the brake control signal to the brake 2. At this time, each potential signal is a low potential.

[0088] At this time, the third XOR gate U5 outputs a high level, the fourth XOR gate U6 outputs a high level, the second NAND gate U7 outputs a low level, the second inverter U8 outputs a high level, the second optocoupler U02 is turned on and outputs a high level to the second signal output circuit 50, the second signal output circuit 50 cuts off the output voltage conversion circuit 12, and the voltage conversion circuit 12 remains in the off state.

[0089] At the same time, when only the first switch circuit 13 is needed to control the on-off of the power signal, at this time, the main controller 200 can output the second switch signal to control the second switch circuit 14 to turn off. At the same time, the main controller 200 can output the second analog signal Ctr12 with a low potential. At this time, the third potential signal K2_FB is at a low level. The second analog signal Ctr12 can pull the second input terminal of the third XOR gate U5 to a low potential, and the second analog signal Ctr12 replaces the third potential signal K2_FB when the second switch circuit 14 is working normally, so that when the second switch circuit 14 exits the working state, a normal potential signal is provided to the first protection circuit 20, and a single-channel power output is completed.

[0090] The first signal output circuit 40 can output two first shutdown signals to the first switch circuit 13 and the second switch circuit 14. The first signal output circuit 40 and the second signal output circuit 50 can use corresponding signal generators, level conversion circuits, etc. In an optional embodiment, Figure 5 As shown, the first signal output circuit 40 includes a first power chip DC1, a first optocoupler circuit 41 and a second optocoupler circuit 42;

[0091] The power input terminal of the first power chip DC1 is connected to the positive power terminal VDD, and the power output terminal of the first power chip DC1 is connected to the input terminal of the first optocoupler circuit 41 and the input terminal of the second optocoupler circuit 42 respectively;

[0092] The first optical coupling circuit 41 includes a twenty-third resistor R23, a twenty-fourth resistor R24, a twenty-fifth resistor R25, a seventh capacitor C7, an eighth capacitor C8 and a third optical coupling U03;

[0093] The first end of the twenty-third resistor R23, the first end of the seventh capacitor C7 and the anode of the third optical coupler U03 are connected to form the input end of the first optical coupler circuit 41, the second end of the twenty-third resistor R23, the second end of the seventh capacitor C7 and the cathode of the third optical coupler U03 are grounded, the collector of the third optical coupler U03 is connected to the first end of the twenty-fourth resistor R24, the second end of the twenty-fourth resistor R24 ​​is connected to the positive power supply terminal VDD, the emitter of the third optical coupler U03, the first end of the twenty-fifth resistor R25, the first end of the eighth capacitor C8 are connected to the control end of the first switch circuit 13, and the second end of the twenty-fifth resistor R25 and the second end of the eighth capacitor C8 are grounded;

[0094] The second optical coupling circuit 42 includes a twenty-sixth resistor R26, a twenty-seventh resistor R27, a twenty-eighth resistor R28, a ninth capacitor C9, a tenth capacitor C10 and a fourth optical coupler U04;

[0095] The first end of the twenty-sixth resistor R26, the first end of the ninth capacitor C9 and the anode of the fourth optocoupler U04 are connected to form the input end of the second optocoupler circuit 42, the second end of the twenty-sixth resistor R26, the second end of the ninth capacitor C9 and the cathode of the fourth optocoupler U04 are grounded, the collector of the fourth optocoupler U04 is connected to the first end of the twenty-seventh resistor R27, the second end of the twenty-seventh resistor R27 is connected to the positive power supply terminal VDD, the emitter of the fourth optocoupler U04, the first end of the twenty-eighth resistor R28, and the first end of the tenth capacitor C10 are connected to the control end of the second switch circuit 14, and the second end of the twenty-eighth resistor R28 and the second end of the tenth capacitor C10 are grounded.

[0096] In this embodiment, the first power chip DC1 realizes voltage conversion, for example, reducing 12V to 5V. When the first signal output circuit 40 does not receive the first enable signal EN1, the first power chip DC1 normally outputs the converted voltage signal. At this time, the third optocoupler U03 and the fourth optocoupler U04 are turned on, and the third optocoupler U03 outputs a high level to the first switch circuit 13, and the fourth optocoupler U04 outputs a high level to the second switch circuit 14. The first switch circuit 13 and the second switch circuit 14 are triggered to turn on after receiving the high level.

[0097] And when the first signal output circuit 40 receives the first enable signal EN1, the first power chip DC1 outputs no voltage signal. At this time, the third optocoupler U03 and the fourth optocoupler U04 are turned off, and the third optocoupler U03 and the fourth optocoupler U04 respectively output a low-level first shutdown signal to the first switch circuit 13 and the second switch circuit 14. The first switch circuit 13 and the second switch circuit 14 trigger shutdown after receiving the first shutdown signal.

[0098] like Figure 6As shown, in an optional embodiment, the second signal output circuit 50 includes a second power chip 51 and a driver 52;

[0099] The power input terminal of the second power chip 51 is connected to the positive power terminal VDD, and the power output terminal of the second power chip 51 is connected to the power terminal of the driver 52 . The driver 52 is used to output a voltage conversion signal to the voltage conversion circuit 12 .

[0100] In this embodiment, the second power supply chip 51 realizes voltage conversion, for example, reducing 12V to 5V. When the second signal output circuit 50 does not receive the second enable signal EN2, the second power supply chip 51 normally outputs the converted voltage signal to the driver 52, the driver 52 normally outputs the voltage conversion signal, and the voltage conversion circuit 12 operates normally.

[0101] And when the second signal output circuit 50 receives the second enable signal EN2, the second power chip 51 stops outputting the voltage signal to the driver 52, the driver 52 stops outputting the voltage conversion signal, and the voltage conversion circuit 12 is turned off.

[0102] Among them, the rectifier circuit 11 can adopt a corresponding rectifier bridge BR1, a rectifier and other structures, the voltage conversion circuit 12 can adopt a corresponding voltage divider circuit, a boost step-down circuit, etc., the first switch circuit 13 and the second switch circuit 14 can adopt corresponding switch devices. In an optional embodiment, as Figure 7 As shown, the rectifier circuit 11 includes a rectifier bridge BR1, and the voltage conversion circuit 12 includes a first switch tube Q1, an inductor L1, a thirteenth capacitor C13 and a third diode D3;

[0103] The cathode of the third diode D3, the first end of the thirteenth capacitor C13 and the positive power supply terminal VDD of the rectifier circuit 11 are connected to form the positive power supply output terminal of the voltage conversion circuit 12, the anode of the third diode D3, the first end of the first switch tube Q1 and the first end of the inductor L1 are connected, the second end of the inductor L1 and the second end of the thirteenth capacitor C13 are connected to form the negative power supply output terminal of the voltage conversion circuit 12, the second end of the first switch tube Q1 is connected to the negative power supply terminal of the rectifier circuit 11, and the control end of the first switch tube Q1 is respectively connected to the signal end of the main controller 200 and the output end of the second signal output circuit 50.

[0104] The first switch tube Q1, the first inductor L1 and the third diode D3 form a buck circuit. The first switch tube Q1 is turned on and off according to the received voltage conversion signal and performs a buck conversion, and is triggered to shut down when receiving the second shutdown signal.

[0105] The first switch circuit 13 adopts the second switch tube K1, and the second switch circuit 14 adopts the third switch tube K2. In order to improve the safety of voltage output, the second switch tube K1 and the third switch tube K2 are IGBT tubes, and the first switch tube Q1 is a MOS tube. The second switch tube K1 and the third switch tube K2 are triggered to turn on when receiving a high level and triggered to turn off when receiving a low level.

[0106] In order to realize the multiple power output control of the power main circuit 10, in an optional embodiment, as Figure 7 As shown, the main power supply circuit 10 also includes:

[0107] Relay RLY1, the switch of relay RLY1 is connected in series between the voltage conversion circuit 12 and the first switch circuit 13 and the second switch circuit 14. The coil of relay RLY1 is energized and transmits a voltage signal to the first switch circuit 13 and the second switch circuit 14, and the coil of relay RLY1 is disconnected when not energized, and the output voltage signal to the first switch circuit 13 and the second switch circuit 14 is cut off. The voltage signal of the coil of relay RLY1 can be provided by a corresponding one of the main controller 200 and the brake power supply circuit 100. In an optional embodiment, as Figure 8 As shown, the brake power supply circuit 100 also includes:

[0108] The third signal output circuit 70 is respectively connected to the coil of the relay RLY1, the first protection circuit 20 and the second protection circuit 30. The third signal output circuit 70 is used to detect the potential of the output signals of the first protection circuit 20 and the second protection circuit 30, and cut off the output voltage enable signal EN3 to the coil of the relay RLY1 when the potentials of the two output signals are different, so as to turn off the relay RLY1.

[0109] In this embodiment, under normal working conditions, the first protection circuit 20 and the second protection circuit 30 do not output the first enable signal EN1 and the second enable signal EN2, that is, they output two high levels. At this time, the third signal output circuit 70 outputs the voltage enable signal EN3 to the coil of the relay RLY1, the relay RLY1 is energized and transmits the voltage signal to the first switch circuit 13 and the second switch circuit 14.

[0110] And in an abnormal state, at least one of the first protection circuit 20 and the second protection circuit 30 outputs a low-level enable signal. At this time, the third signal output circuit 70 cuts off the output voltage enable signal EN3 to the coil of the relay RLY1, and the relay RLY1 is not powered on and disconnected, and the output voltage signal to the first switch circuit 13 and the second switch circuit 14 is cut off.

[0111] By setting the third signal output circuit 70 to realize the logical judgment of the two enable signals and correspondingly control the on-off operation of the relay RLY1, further power output control of the motor of the power main circuit 10 can be achieved, thereby improving the reliability of power output control under abnormal conditions and ensuring the braking control of the brake 2.

[0112] Correspondingly, the third signal output circuit 70 may use corresponding logic gates, level conversion circuits, etc. In an optional embodiment, as shown in FIG. Fig. 9 As shown, the third signal output circuit 70 includes an AND gate U9, a twenty-ninth resistor R29, a thirtieth resistor R30, a thirty-first resistor R31, an eleventh capacitor C11, a twelfth capacitor C12 and a fifth optical coupler U05;

[0113] The first input terminal of the AND gate U9 is connected to the output terminal of the first protection circuit 20, the second input terminal of the AND gate U9 is connected to the output terminal of the second protection circuit 30, the output terminal of the AND gate U9, the first end of the twenty-ninth resistor R29, the first end of the eleventh capacitor C11 and the anode of the fifth optocoupler U05 are connected, the second end of the twenty-ninth resistor R29, the second end of the eleventh capacitor C11 and the cathode of the fifth optocoupler U05 are grounded, the collector of the fifth optocoupler U05 is connected to the first end of the thirtieth resistor R30, the second end of the thirtieth resistor R30 is connected to the positive power supply terminal VDD, the emitter of the fifth optocoupler U05, the first end of the thirty-first resistor R31 and the first end of the twelfth capacitor C12 are connected to form the signal output terminal of the third signal output circuit 70, and the second end of the thirty-first resistor R31 and the second end of the twelfth capacitor C12 are grounded.

[0114] In this embodiment, under normal working conditions, the first protection circuit 20 and the second protection circuit 30 have no first enable signal EN1 and the second enable signal EN2 output, that is, they output two high levels. At this time, the AND gate U9 outputs a high level, the fifth optocoupler U05 is turned on, and outputs a high level voltage enable signal EN3 to the coil of the relay RLY1. The relay RLY1 is energized and transmits the voltage signal to the first switch circuit 13 and the second switch circuit 14.

[0115] And in an abnormal state, at least one of the first protection circuit 20 and the second protection circuit 30 outputs a low-level enable signal. At this time, the AND gate U9 outputs a low level, the fifth optocoupler U05 is turned off, and the output voltage enable signal EN3 to the coil of the relay RLY1 is cut off. The relay RLY1 is not powered on and disconnected, and the output voltage signal to the first switch circuit 13 and the second switch circuit 14 is cut off.

[0116] Compared with the prior art, the embodiments of the present invention have the following beneficial effects: the above-mentioned brake power supply circuit 100 includes a power supply main circuit 10, a sampling circuit 60, a first protection circuit 20, a second protection circuit 30, a first signal output circuit 40 and a second signal output circuit 50, the power supply main circuit 10 includes a rectifier circuit 11, a voltage conversion circuit 12 and a first switch circuit 13 and a second switch circuit 14 connected in sequence, and when an abnormal condition occurs in the corresponding power supply in the power supply main circuit 10 or the brake control signal output to the brake 2, the first protection circuit 20 is triggered. The first enable signal EN1 is output, and the first signal output circuit 40 triggers the first switch circuit 13 and the second switch circuit 14 to be turned off based on the first enable signal EN1. The second protection circuit 30 triggers the output of the second enable signal EN2, and the second signal output circuit 50 triggers the shutdown of the voltage conversion circuit 12 based on the second enable signal EN2, thereby cutting off the power supply of the holding brake 2, and the holding brake 2 switches to the holding brake state. The holding brake power supply circuit 100 does not need to be provided with the holding brake 2, and adopts a circuit structure, thereby realizing the miniaturization of the holding brake device and reducing the design cost.

[0117] The present invention also provides a brake driver 521, such as Fig.10 As shown, the brake driver 521 includes a main controller 200 and the above-mentioned brake power circuit 100. The specific structure of the brake power circuit 100 refers to the above-mentioned embodiment. Since the brake driver 521 adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here. Among them, the main controller 200 is connected to the brake power circuit 100.

[0118] When the brake 2 is in the brake release state, the main controller 200 outputs a brake control signal to the brake brake 2 and outputs a corresponding power control signal to the brake power circuit 100. The brake power circuit 100 triggers the output power signal to the brake brake 2 based on the brake control signal. After the brake brake 2 is powered on and receives the brake control signal, it switches to the brake release state and releases the corresponding module, such as releasing the corresponding component in the elevator. The elevator will not brake. When an abnormality occurs, the main controller 200 will stop outputting the brake control signal. At the same time, the main controller 200 outputs the corresponding power control signal to the brake power circuit 100. The brake power circuit 100 stops outputting the power signal. After the brake brake 2 has no working power and brake control signal, the brake brake 2 switches to the brake locking mode and brakes the corresponding module, such as the corresponding component in the brake elevator. The elevator brakes to avoid hitting the top or squatting at the bottom.

[0119] The present invention also provides an elevator brake device, such as Fig.10As shown, the elevator brake device can be applied to the elevator, and the elevator brake device includes a brake brake 2 and the brake driver 521. The specific structure of the brake driver 521 refers to the above embodiment. Since the elevator brake device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Among them, the brake driver 521 is connected to the brake brake 2.

[0120] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A brake power supply circuit, used for outputting a power signal to a brake, characterized in that: The brake power supply circuit comprises: A power main circuit, the power main circuit comprising a rectifier circuit, a voltage conversion circuit and a power output circuit connected in sequence, the power output circuit comprising a first switch circuit and a second switch circuit connected in parallel between the voltage conversion circuit and the holding brake; a sampling circuit, connected to the output end of the voltage conversion circuit, the output end of the first switch circuit, the output end of the second switch circuit and the control signal end of the holding brake respectively, and sampling and outputting corresponding first potential signals, second potential signals, third potential signals and fourth potential signals; A first protection circuit is connected to the sampling circuit, and the first protection circuit is used to detect the potentials of the first potential signal, the second potential signal and the fourth potential signal, and output a first enable signal when the potentials of the potential signals are not the same; A second protection circuit is connected to the sampling circuit, and the second protection circuit is used to detect the potentials of the first potential signal, the third potential signal and the fourth potential signal, and output a second enable signal when the potentials of the potential signals are not the same; A first signal output circuit is connected to the first protection circuit and is triggered by the first enable signal to output a first shutdown signal to shut down the first switch circuit and the second switch circuit; The second signal output circuit is connected to the second protection circuit, and is triggered by the second enable signal to output a second shutdown signal to shut down the voltage conversion circuit.

2. The brake power supply circuit according to claim 1, characterized in that: The first switch circuit and the second switch circuit are also connected to a main controller, and the main controller is used to output a brake control signal to a control signal terminal of the brake, output a first switch signal to the first switch circuit, and output a second switch signal to the second switch circuit; The first protection circuit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a first capacitor, a second capacitor, a third capacitor, a first diode, a first XNOR gate, a second XNOR gate, a first NAND gate, a first inverter and a first optocoupler; The first end of the first resistor is used to input the fourth potential signal, the second end of the first resistor is connected to the first input end of the first XNOR gate, the first end of the second resistor is used to input the second potential signal, the second end of the second resistor, the cathode of the first diode, the first end of the third resistor and the second input end of the first XNOR gate are connected, the anode of the first diode is connected to the first end of the fourth resistor, the second end of the fourth resistor is used to input the first analog signal, the second end of the third resistor is grounded, the output end of the first XNOR gate is connected to the first input end of the first NAND gate, the first end of the fifth resistor is used to input the first potential signal, the second end of the fifth resistor is connected to the first input end of the second XNOR gate, the first end of the sixth resistor is used to input the fourth potential signal, the second end of the sixth resistor is connected to the second input end of the second XNOR gate, and the second XNOR gate The output end of is connected to the second input end of the first NAND gate, the output end of the first NAND gate is connected to the first end of the seventh resistor, the second end of the seventh resistor, the first end of the first capacitor and the input end of the first inverter are connected, the second end of the first capacitor is grounded, the output end of the first inverter is connected to the first end of the eighth resistor, the second end of the eighth resistor, the first end of the ninth resistor, the first end of the second capacitor and the anode of the first optocoupler are connected, the second end of the ninth resistor, the second end of the second capacitor and the cathode of the first optocoupler are grounded, the collector of the first optocoupler is connected to the first end of the tenth resistor, the second end of the tenth resistor is connected to the positive voltage end, the emitter of the first optocoupler, the first end of the eleventh resistor and the first end of the third capacitor are connected to form the output end of the first protection circuit, and the second end of the eleventh resistor and the second end of the third capacitor are grounded.

3. The brake power supply circuit according to claim 2, characterized in that: The second protection circuit includes a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a twenty-second resistor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a second diode, a third XNOR gate, a fourth XNOR gate, a second NAND gate, a second inverter and a second optocoupler; The first end of the twelfth resistor is used to input the fourth potential signal, the second end of the twelfth resistor is connected to the first input end of the third XNOR gate, the first end of the thirteenth resistor is used to input the third potential signal, the second end of the thirteenth resistor, the cathode of the second diode, the first end of the fourteenth resistor and the second input end of the third XNOR gate are connected, the anode of the second diode is connected to the first end of the fifteenth resistor, the second end of the fifteenth resistor is used to input the second analog signal, the second end of the fourteenth resistor is grounded, the output end of the third XNOR gate is connected to the first input end of the second NAND gate, the first end of the sixteenth resistor is used to input the first potential signal, the second end of the sixteenth resistor is connected to the first input end of the fourth XNOR gate, the first end of the seventeenth resistor is used to input the fourth potential signal, the second end of the seventeenth resistor is connected to the second input end of the fourth XNOR gate, The output end is connected to the second input end of the second NAND gate, the output end of the second NAND gate is connected to the first end of the eighteenth resistor, the second end of the eighteenth resistor, the first end of the fourth capacitor and the input end of the second inverter are connected, the second end of the fourth capacitor is grounded, the output end of the second inverter is connected to the first end of the nineteenth resistor, the second end of the nineteenth resistor, the first end of the twentieth resistor, the first end of the fifth capacitor and the anode of the second optocoupler are connected, the second end of the twentieth resistor, the second end of the fifth capacitor and the cathode of the second optocoupler are grounded, the collector of the second optocoupler is connected to the first end of the twenty-first resistor, the second end of the twenty-first resistor is connected to the positive voltage end, the emitter of the second optocoupler, the first end of the twenty-second resistor and the first end of the sixth capacitor are connected to form the output end of the second protection circuit, and the second end of the twenty-second resistor and the second end of the sixth capacitor are grounded.

4. The brake power supply circuit according to claim 1, characterized in that: The first signal output circuit includes a first power chip, a first optocoupler circuit and a second optocoupler circuit; The power input terminal of the first power chip is connected to the positive power terminal, and the power output terminal of the first power chip is connected to the input terminal of the first optocoupler circuit and the input terminal of the second optocoupler circuit respectively; The first optical coupler circuit includes a twenty-third resistor, a twenty-fourth resistor, a twenty-fifth resistor, a seventh capacitor, an eighth capacitor and a third optical coupler; The first end of the twenty-third resistor, the first end of the seventh capacitor and the anode of the third optical coupler are connected to form the input end of the first optical coupler circuit, the second end of the twenty-third resistor, the second end of the seventh capacitor and the cathode of the third optical coupler are grounded, the collector of the third optical coupler is connected to the first end of the twenty-fourth resistor, the second end of the twenty-fourth resistor is connected to the positive power supply end, the emitter of the third optical coupler, the first end of the twenty-fifth resistor, the first end of the eighth capacitor are connected to the control end of the first switch circuit, and the second end of the twenty-fifth resistor and the second end of the eighth capacitor are grounded; The second optical coupler circuit includes a twenty-sixth resistor, a twenty-seventh resistor, a twenty-eighth resistor, a ninth capacitor, a tenth capacitor and a fourth optical coupler; The first end of the twenty-sixth resistor, the first end of the ninth capacitor and the anode of the fourth optocoupler are connected to form the input end of the second optocoupler circuit, the second end of the twenty-sixth resistor, the second end of the ninth capacitor and the cathode of the fourth optocoupler are grounded, the collector of the fourth optocoupler is connected to the first end of the twenty-seventh resistor, the second end of the twenty-seventh resistor is connected to the positive power supply end, the emitter of the fourth optocoupler, the first end of the twenty-eighth resistor, the first end of the tenth capacitor are connected to the control end of the second switch circuit, and the second end of the twenty-eighth resistor and the second end of the tenth capacitor are grounded.

5. The brake power supply circuit according to claim 1, characterized in that: The second signal output circuit includes a second power chip and a driver; The power input terminal of the second power chip is connected to the positive power terminal, the power output terminal of the second power chip is connected to the power terminal of the driver, and the driver is used to output a voltage conversion signal to the voltage conversion circuit.

6. The brake power supply circuit according to any one of claims 1 to 5, characterized in that: The main power supply circuit also includes: A relay, wherein a switch of the relay is connected in series between the voltage conversion circuit and the first switch circuit and the second switch circuit; The brake power supply circuit also includes: The third signal output circuit is respectively connected to the coil of the relay, the first protection circuit and the second protection circuit. The third signal output circuit is used to detect the potential of the output signals of the first protection circuit and the second protection circuit, and to cut off the output voltage enable signal to the coil of the relay when the potentials of the two output signals are different, so as to turn off the relay.

7. The brake power supply circuit according to claim 6, characterized in that: The third signal output circuit includes an AND gate, a twenty-ninth resistor, a thirtieth resistor, a thirty-first resistor, an eleventh capacitor, a twelfth capacitor and a fifth optical coupler; The first input end of the AND gate is connected to the output end of the first protection circuit, the second input end of the AND gate is connected to the output end of the second protection circuit, the output end of the AND gate, the first end of the twenty-ninth resistor, the first end of the eleventh capacitor and the anode of the fifth optocoupler are connected, the second end of the twenty-ninth resistor, the second end of the eleventh capacitor and the cathode of the fifth optocoupler are grounded, the collector of the fifth optocoupler is connected to the first end of the thirtieth resistor, the second end of the thirtieth resistor is connected to the positive power supply end, the emitter of the fifth optocoupler, the first end of the thirty-first resistor and the first end of the twelfth capacitor are connected to form the signal output end of the third signal output circuit, and the second end of the thirty-first resistor and the second end of the twelfth capacitor are grounded.

8. The brake power supply circuit according to claim 1, characterized in that: The voltage conversion circuit includes a first switch tube, an inductor, a thirteenth capacitor and a third diode; The cathode of the third diode, the first end of the thirteenth capacitor and the positive power supply end of the rectifier circuit are connected to form the positive power supply output end of the voltage conversion circuit, the anode of the third diode, the first end of the first switch tube and the first end of the inductor are connected, the second end of the inductor and the second end of the thirteenth capacitor are connected to form the negative power supply output end of the voltage conversion circuit, the second end of the first switch tube is connected to the negative power supply end of the rectifier circuit, and the control end of the first switch tube is respectively connected to the signal end of the main controller and the output end of the second signal output circuit.

9. A brake driver, characterized in that: The invention comprises a main controller and a brake power supply circuit according to any one of claims 1 to 8, wherein the main controller is connected to the brake power supply circuit.

10. An elevator brake device, characterized in that: The invention comprises a holding brake and a holding brake driver as claimed in claim 9, wherein the holding brake driver is connected to the holding brake.

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