Control circuit of elevator car and elevator control cabinet

Abstract

The utility model relates to a control circuit of an elevator car and an elevator control cabinet. The control circuit of the elevator car comprises a processing module, a car position detection module, a trigger module and a power supply control module, the processing module is connected to the triggering module and used for obtaining the running state information of the elevator and sending the obtained running state information to the triggering module; the lift car position detection module is connected to the trigger module and used for obtaining a lift car moving signal and sending the obtained lift car moving signal to the trigger module; the trigger module is connected to the power supply control module and is used for generating a control signal based on the running state information and the car moving signal; and the power supply control module responds to the control signal to control the power supply state of the brake. The problem that in the related technology, when an elevator stops running, the elevator car still continues to move can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of elevator control, and in particular to a control circuit of an elevator car and an elevator control cabinet. Background Art

[0002] With the development of electronic technology, elevators are used in many occasions, and people's requirements for the comfort of elevators are gradually increasing. When the elevator stops running, the elevator car is required to stop moving. Specifically, the power supply of the elevator motor brake is cut off to achieve the brake lock of the elevator. Among them, the motor brake is an electromechanical device that prevents the elevator from moving again when the elevator car is stationary and the motor is in a power-off state.

[0003] The existing method of cutting off the power supply of the motor brake is mainly to cut off the power supply of the contactor. However, the contactor is prone to adhesion in a high temperature environment or when the operating frequency is too high. When the contactor sticks, the power supply of the motor brake cannot be cut off, so that when the elevator stops running, the elevator car continues to move, which poses a safety hazard.

[0004] With regard to the problem in the prior art that the elevator car continues to move when the elevator stops running, no effective solution has been proposed yet. Utility Model Content

[0005] The present application provides a control circuit for an elevator car and an elevator control cabinet to solve the problem in the related art that the elevator car continues to move when the elevator stops running.

[0006] In this embodiment, a control circuit for an elevator car is provided, the control circuit comprising: a processing module, a car position detection module, a trigger module and a power control module;

[0007] The processing module is connected to the trigger module and is used to obtain the running status information of the elevator and send the obtained running status information to the trigger module;

[0008] The car position detection module is connected to the trigger module and is used to obtain a car movement signal and send the obtained car movement signal to the trigger module;

[0009] The trigger module is connected to the power control module and is used to generate a control signal based on the operation status information and the car movement signal;

[0010] The power control module controls the power supply state of the brake in response to the control signal.

[0011] In some embodiments, the power control module includes a first switch tube connected in series between the power source and the brake;

[0012] When the processing module obtains that the running state of the elevator is a stopped state, the processing module sends a first level signal;

[0013] The car position detection module sends an edge signal when detecting the movement of the car;

[0014] When the trigger module receives the first level signal and the edge signal at the same time, it outputs a second level signal to control the first switch tube to turn off.

[0015] In some of the embodiments, the car position detection module includes a position sensor and a frequency division module;

[0016] The frequency division module is connected to the position sensor and the trigger module;

[0017] The frequency division module is used to perform frequency division processing on the output signal of the position sensor to obtain a frequency division signal, and send the frequency division signal to the trigger module.

[0018] In some embodiments, the power control module also includes a triode unit, which is electrically connected between the trigger module and the control end of the first switch tube. After receiving the second level signal, the triode unit controls the control end of the first switch tube to lose power.

[0019] In some embodiments, the triode unit includes a first triode and a second triode; the base of the first triode is electrically connected to the trigger module; the base of the second triode is electrically connected to the collector of the first triode, the emitter of the second triode is electrically connected to the emitter of the first triode, and the control end of the first switch tube is electrically connected between the base and the collector of the second triode; when the trigger module outputs the second level signal, the first triode is turned on, the second triode is turned off, and the control end of the first switch tube loses power.

[0020] In some embodiments, the power control module further includes a driving unit, an output end of the driving unit is electrically connected to the control end of the first switching tube; and an input end of the driving unit is electrically connected between the base and collector of the second transistor.

[0021] In some embodiments, the driving unit includes an optocoupler, which includes a transmitting end and a receiving end; the transmitting end includes an emitting diode; the anode of the emitting diode is electrically connected to the base of the second transistor, and the cathode of the emitting diode is electrically connected to the collector of the second transistor; the receiving end is electrically connected to the control end of the first switching tube.

[0022] In some embodiments, a second resistor is connected between the anode of the emitting diode and the base of the second transistor, and a first resistor is connected between the cathode of the emitting diode and the collector of the second transistor; and the car position detection module supplies power to the transistor unit.

[0023] In some embodiments, the operation status information of the elevator includes reset, stop and run;

[0024] When the trigger module receives the reset information, the brake is controlled to be energized;

[0025] When the trigger module receives the car movement signal, if the running information is received at the same time, the brake is controlled to be energized; if the stop information is received at the same time, the brake is controlled to be de-energized.

[0026] The present application also provides an elevator control cabinet, comprising a control panel, on which the control circuit of the elevator car is arranged.

[0027] Compared with the related art, in this embodiment, a control circuit of an elevator car and an elevator control cabinet are provided, wherein the control circuit of the elevator car includes: a processing module, a car position detection module, a trigger module and a power control module; the processing module is connected to the trigger module, used to obtain the elevator operation status information, and send the obtained operation status information to the trigger module; the car position detection module is connected to the trigger module, used to obtain the car movement signal, and send the obtained car movement signal to the trigger module; the trigger module is connected to the power control module, used to generate a control signal based on the operation status information and the car movement signal; the power control module responds to the control signal to control the power supply state of the brake. It obtains the operation status information of the elevator through the processing module, and obtains the car movement signal through the car position detection module, and generates a control signal according to the operation status information of the elevator and the car movement signal, so as to realize that when the elevator stops running and the elevator car continues to move, the power supply to the motor brake is disconnected, and the motor of the motor brake is locked, thereby avoiding the movement of the car, solving the problem that the elevator car continues to move when the elevator stops running in the related art.

[0028] Details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0030] Figure 1 is a schematic diagram of the principle of a control circuit of an elevator car of the present embodiment;

[0031] Figure 2 is a schematic diagram of the principle of a control circuit of another elevator car of the present embodiment;

[0032] Figure 3 is a structural schematic diagram of a power supply control module of a control circuit of an elevator car of the present embodiment;

[0033] Figure 4 Schematic diagram of the circuit structure of the control circuit of the elevator car of this embodiment. DETAILED DESCRIPTION

[0034] In order to more clearly understand the purpose, technical solutions and advantages of the present application, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments.

[0035] Unless otherwise defined, the technical terms or scientific terms involved in this application shall have the general meaning understood by people with ordinary skills in the technical field to which this application belongs. The words "one", "a", "a", "the", "these" and the like in this application do not represent quantitative restrictions, and they can be singular or plural. The terms "include", "comprise", "have" and any variants thereof involved in this application are intended to cover non-exclusive inclusions; for example, a process, method and system, product or device comprising a series of steps or modules (units) is not limited to the listed steps or modules (units), but may include unlisted steps or modules (units), or may include other steps or modules (units) inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether directly or indirectly. The "multiple" involved in this application refers to two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, "A and / or B" can mean: A exists alone, A and B exist at the same time, and B exists alone. Usually, the character " / " indicates that the objects associated with each other are in an "or" relationship. The terms "first", "second", "third", etc. involved in this application are only used to distinguish similar objects and do not represent a specific ordering of the objects.

[0036] See also Figure 1 , Figure 1 FIG. 1 is a schematic diagram of a control circuit 100 of an elevator car of the present embodiment. Figure 1 As shown, the control circuit 100 of the elevator car includes: a processing module 110, a car position detection module 120, a trigger module 130 and a power control module 140; the processing module 110 is connected to the trigger module 130, and is used to obtain the operating status information of the elevator, and send the obtained operating status information to the trigger module 130; the car position detection module 120 is connected to the trigger module 130, and is used to obtain the car movement signal, and send the obtained car movement signal to the trigger module 130; the trigger module 130 is connected to the power control module 140, and is used to generate a control signal based on the operating status information and the car movement signal; the power control module 140 responds to the control signal to control the power supply state of the brake.

[0037] This embodiment obtains the running status information of the elevator through the processing module 110, and obtains the car movement signal through the car position detection module 120, and generates a control signal according to the running status information of the elevator and the car movement signal, and in response to the control signal, disconnects the power supply of the elevator brake when the running status information of the elevator is in the stopped state and the elevator car is moving, so that when the elevator stops running and the elevator car continues to move, the power supply to the brake is disconnected, and the brake motor is locked, thereby avoiding the movement of the car, which solves the problem in the related art that the elevator car continues to move when the elevator stops running.

[0038] Among them, the processing module 110 in this embodiment may include a CPU (Central Processing Unit), an ARM (ARM processor) or a DSP (Digital Signal Processor), etc., which is used to obtain the operation status information of the elevator. It should be noted that the elevator operation status information is generated by one or more processors of the CPU (Central Processing Unit), ARM (ARM processor) and DSP (Digital Signal Processor). The specific processor that generates the elevator operation status information and sends it to the processing module 110 can be determined according to the actual application of the elevator, and this embodiment does not make specific restrictions. The above-mentioned elevator operation status information may include three status information: reset, stop and run.

[0039] The car position detection module 120 can use any device that can detect whether the car position moves and send a signal, such as a sine-cosine encoder, an incremental encoder, an absolute position sensor, etc. Among them, the encoder is installed on the motor. Since the elevator car is connected to the motor shaft through a wire rope, when the elevator car moves, the motor rotor will rotate. The encoder is connected to the rotor shaft. When the motor rotor rotates, the encoder will output a signal, that is, when the elevator car moves, the car movement signal is output. Therefore, it can be determined whether the elevator car moves by whether the car position detection module 120 obtains the car movement signal.

[0040] The trigger module 130 can determine the operation state of the elevator and whether the elevator car moves based on the operation state information and the car movement signal, and generate a control signal. Among them, the control signal is used to control the power supply and power off of the power supply of the elevator brake. Specifically, the control signal can include a high level and a low level. Generally, when the trigger module 130 detects that the elevator is in a reset state according to the operation state information, it is not necessary to detect whether the elevator car moves. At this time, the control signal generated by the trigger module 130 maintains the power supply of the elevator brake to ensure the normal reset of the elevator. When the trigger module 130 detects that the elevator is in a running state according to the operation state information, it is not necessary to detect whether the elevator car moves. At this time, the control signal generated by the trigger module 130 maintains the power supply of the elevator brake to ensure the normal operation of the elevator. When the trigger module 130 detects that the elevator is in a stopped state according to the operation state information, it is determined whether the elevator car moves by the acquired car movement signal. Specifically, when the trigger module 130 detects that the elevator is in a stopped state and determines that the elevator car is moving through the acquired car movement signal, the trigger module 130 generates a control signal to disconnect the power supply of the elevator brake to achieve locking of the brake motor, thereby stopping the movement of the car.

[0041] Specifically, as an implementable embodiment, the power control module 140 includes a first switch tube 142 connected in series between the power supply and the brake; the processing module 110 sends a first level signal when it obtains that the running state of the elevator is a stopped state; the car position detection module 120 sends an edge signal when it detects that the car is moving; the trigger module 130 outputs a second level signal when it receives the first level signal and the edge signal at the same time, and controls the first switch tube 142 to turn off.

[0042] In this embodiment, the first switch tube 142 includes a control end, and the power supply and power off of the brake can be realized by energizing and de-energizing the control end of the first switch tube 142. The power supply is a grid power supply. Preferably, the first switch tube 142 can be realized by a thyristor device, and can also be realized by a MOSFET (Metal Oxide Semiconductor Field Effect Transistor) or an IGBT (Insulated Gate Bipolar Transistor). The edge signal can be a rising edge signal or a falling edge signal. When the trigger module 130 receives the first level signal and the edge signal at the same time, it detects that the elevator is in a stopped state and the elevator car is moving. At this time, by outputting the second level signal, the first switch tube 142 is controlled to be turned off, thereby realizing the power off of the brake and the locking of the brake motor, thereby stopping the movement of the car.

[0043] As an implementable embodiment, the power control module 140 also includes a transistor unit 144, which is electrically connected between the trigger module 130 and the control end of the first switch tube 142. After receiving the second level signal, the transistor unit 144 controls the control end of the first switch tube 142 to lose power.

[0044] Specifically, as an implementation method, the transistor unit 144 includes a first transistor Q1 and a second transistor Q2; the base B of the first transistor Q1 is electrically connected to the trigger module 130; the base B of the second transistor Q2 is electrically connected to the collector C of the first transistor Q1, the emitter E of the second transistor Q2 is electrically connected to the emitter E of the first transistor Q1, and the control end of the first switch tube 142 is electrically connected between the base B and the collector C of the second transistor Q2; when the trigger module 130 outputs the second level signal, the first transistor Q1 is turned on, the second transistor Q2 is turned off, and the control end of the first switch tube 142 loses power. The above-mentioned first transistor Q1 and the second transistor Q2 can be NPN transistors.

[0045] As an implementable embodiment, the power control module 140 also includes a driving unit 146, the output end of the driving unit 146 is electrically connected to the control end of the first switch tube 142; the input end of the driving unit 146 is electrically connected between the base B and the collector C of the second transistor Q2.

[0046] Specifically, the driving unit 146 can be an optical coupler, wherein the optical coupler includes a transmitting end and a receiving end; the transmitting end includes an emitting diode T1; the positive electrode of the emitting diode T1 is electrically connected to the base B of the second transistor Q2, and the negative electrode of the emitting diode T1 is electrically connected to the collector C of the second transistor Q2; the receiving end is electrically connected to the control end of the first switch tube 142. The above-mentioned emitting diode T1 can be an infrared light-emitting diode, and the receiving end of the above-mentioned optical coupler can be a photosensitive semiconductor tube. It should be noted that the transmitting end and the receiving end of the above-mentioned optical coupler include but are not limited to infrared light-emitting diodes and photosensitive semiconductor tubes, as long as the power-on and power-off control of the control end of the first switch tube 142 can be achieved through the transmitting end and the receiving end of the optical coupler.

[0047] It should be noted that the above-mentioned driving unit 146 can be an optocoupler, an optocoupler relay, or a dedicated driving chip for a thyristor, etc. This embodiment does not make any specific limitations here, as long as the driving unit 146 can realize the control of power on and power off of the control end of the first switch tube 142.

[0048] As an implementable embodiment, a second resistor is connected between the positive electrode of the emitting diode T1 and the base of the second transistor Q2, and a first resistor is connected between the negative electrode of the emitting diode T1 and the collector of the second transistor Q2; the car position detection module 120 supplies power to the transistor unit 144. Specifically, the above-mentioned car position detection module 120 also includes a power supply module 126 for supplying power to the transistor unit 144. The above-mentioned power supply module 126 may include a +24V positive power supply and a 0V negative power supply. The positive electrode of the power supply module 126 is electrically connected between the positive electrode of the emitting diode T1 and the second resistor, and the negative electrode of the power supply module 126 is electrically connected to the emitter of the first transistor Q1 and the emitter of the second transistor Q2. It should be noted that the voltage values ​​of the positive and negative power supply of the above-mentioned power supply module 126 can be adjusted according to the specific application scenario or different versions of the elevator, and only one of the cases is exemplified here.

[0049] As an implementation option, see Figure 2 , Figure 2 FIG. 1 is a schematic diagram of the control circuit of another elevator car of the present embodiment. Figure 2 As shown, the car position detection module 120 includes a position sensor 122 and a frequency division module 124; the frequency division module 124 connects the position sensor 122 and the trigger module 130; the frequency division module 124 is used to perform frequency division processing on the output signal of the position sensor 122 to obtain a frequency division signal, and send the frequency division signal to the trigger module 130.

[0050] Among them, the frequency division module 124 includes a frequency divider. The frequency divider can be an existing frequency division chip, or it can be a product constructed in the form of ARM, CPU, DSP or FPGA (Field Programmable Gate Array), which can realize the frequency division processing of the car movement signal in the car position detection module 120. When the elevator car does not move, there is no car movement signal output, and the level state of the frequency divider output does not change, that is, no rising edge and falling edge are generated at the output end of the frequency divider. When the elevator car moves, there is a car movement signal output, and the state of the level output by the frequency divider is reversed. For example, if the level of the previous frequency divider output is a high level, when the elevator car moves, the frequency divider outputs a low level; if the level of the previous frequency divider output is a low level, when the elevator car moves, the frequency divider outputs a high level. That is, when the elevator car moves, the output end of the frequency divider generates a rising edge signal or a falling edge signal, that is, the car position detection module 120 sends an edge signal when detecting the movement of the car.

[0051] As an implementable method, the trigger module 130 of this embodiment may be a D flip-flop.

[0052] Specifically, the above-mentioned D flip-flop can be a proprietary D flip-flop chip. Among them, the processing module 110 is connected to the reset terminal and data input terminal of the D flip-flop, and the car position detection module 120 is connected to the clock terminal (CLK terminal) of the above-mentioned D flip-flop. Specifically, the process of generating a control signal based on the operation status information and the encoder signal by using the D flip-flop can be that when the operation status information shows that the elevator is in the reset state, the processing module 110 sends a high-level signal to the reset terminal of the D flip-flop. At this time, the D flip-flop directly outputs a low-level control signal to maintain the power supply of the power supply of the elevator brake to ensure that the elevator is reset; when the operation status information shows that the elevator is in the operation state, the processing module 110 sends a low-level signal to the data input terminal of the D flip-flop, and when the elevator car moves, the car position detection module 120 sends a low-level signal to the clock terminal of the D flip-flop. Edge signal. According to the principle of the D flip-flop, the trigger module 130 generates a low-level control signal at this time to keep the power supply of the elevator brake to ensure the normal movement of the elevator; when the elevator is in a stopped state, the processing module 110 sends a high-level signal to the data input end of the D flip-flop. When the elevator car moves, the car position detection module 120 sends an edge signal to the clock end of the D flip-flop. According to the principle of the D flip-flop, the trigger module 130 generates a high-level control signal at this time to control the first switch to turn off, thereby realizing the locking of the brake motor, thereby stopping the movement of the car.

[0053] In this embodiment, the processing module 110 is connected to the reset terminal and the data input terminal of the D flip-flop, and the car position detection module 120 is connected to the clock terminal (CLK terminal) of the above-mentioned D flip-flop. When the elevator is in a stopped state, the processing module 110 can send a high-level signal to the data input terminal of the D flip-flop, and when the elevator car moves, the car position detection module 120 can send an edge signal to the clock terminal of the D flip-flop, thereby utilizing the principle of the D flip-flop to generate a control signal to disconnect the power supply of the elevator brake, so that when the elevator stops running and the elevator car continues to move, the brake motor can be locked, thereby stopping the movement of the car.

[0054] In addition, the trigger module 130 may be constructed in the form of ARM, CPU, DSP or FPGA, and may generate a control signal based on the operation status information and the encoder signal.

[0055] Figure 3 FIG. 1 is a schematic diagram of the structure of the power supply control module 140 of the control circuit of the elevator car of this embodiment. Figure 3 As shown, the power control module 140 includes a first switch tube 142, a transistor unit 144 and a drive unit 146; wherein the first switch tube 142 is connected in series between the power supply 150 and the brake 160, and is connected to the drive unit 146; the transistor unit 144 is electrically connected to the trigger module 130, the power module 126 and the drive unit 146; the drive unit 146 is electrically connected to the power module 126 and the power supply 150.

[0056] Figure 4 FIG. 2 is a schematic diagram of the circuit structure of the control circuit of the elevator car of this embodiment. Figure 4As shown, the frequency division module 124 is a frequency divider U1, and the frequency divider U1 is electrically connected to the position sensor 122; the trigger module 130 is a trigger U2, and the trigger U2 is electrically connected to the frequency divider U1 and the processing module 110; the transistor unit 144 includes a first transistor Q1 and a second transistor Q2, wherein the base of the first transistor Q1 is electrically connected to the trigger U2, the emitter of the first transistor Q1 is electrically connected to the negative power supply of the power module 126, and the collector of the first transistor Q1 is electrically connected to the second resistor R2 and the base of the second transistor Q2; the base of the second transistor Q2 is also electrically connected to the second resistor R2, and the emitter collector of the second transistor Q2 is connected to the negative power supply of the power module 126, The collector of the second transistor Q2 is electrically connected to the first resistor R1; one end of the first resistor R1 is electrically connected to the cathode of the emitter diode of the optocoupler PC1, and one end of the second resistor R2 is electrically connected to the anode of the power supply of the power module 126 and the anode of the emitter diode of the optocoupler PC1; the driving unit 146 is an optocoupler PC1, and the optocoupler PC1 includes a transmitter and a receiver, the transmitter is a diode, and the receiver of the optocoupler PC1 is electrically connected to the power supply 150 and the first switch tube 142; the first switch tube 142 is a thyristor Q3, and the thyristor Q3 is electrically connected to the power supply 150 and the rectifier bridge Q4; the rectifier bridge Q4 is a component of the power supply circuit of the brake 160, and the rectifier bridge is electrically connected to the brake 160.

[0057] Next, Figure 4 The working principle of the control circuit of the elevator car shown in the figure is specifically described. For example, the operation status information of the elevator includes reset, stop and run;

[0058] When the trigger module 130 receives the reset information, the brake 160 is controlled to be energized.

[0059] Specifically, when the elevator is in a reset state, the reset end of the D flip-flop receives a high-level signal sent by the processing module 110 and outputs a low-level control signal. When the first transistor Q1 receives the low-level control signal output by the D flip-flop, the first transistor Q1 is turned off. When the first transistor Q1 is turned off, the second transistor Q2 is turned on. When the first transistor Q1 is turned off and the second transistor Q2 is turned on, the transmitting end of the optocoupler PC1 is turned on. When the transmitting end of the optocoupler PC1 is turned on, the receiving end of the optocoupler PC1 is turned on. When the receiving end of the optocoupler PC1 is turned on, the thyristor Q3 is turned on. When the thyristor Q3 is turned on, the circuit of the overpower supply 150 and the brake 160 is turned on. At this time, the power supply of the brake 160 of the elevator normally supplies power to the brake 160.

[0060] When the trigger module 130 receives the car moving signal, if the running information is received at the same time, the brake 160 is controlled to be energized, and if the stop information is received at the same time, the brake 160 is controlled to be de-energized.

[0061] Specifically, when the elevator is in the running state, the data input end of the D trigger receives the low-level signal sent by the processing module 110. At this time, the car position detection module 120 sends an edge signal to the clock end of the D trigger when the elevator car moves, and the trigger module 130 outputs a low-level control signal. When the first transistor Q1 receives the low-level control signal output by the D trigger, the first transistor Q1 is turned off. When the first transistor Q1 is turned off, the second transistor Q2 is turned on. When the first transistor Q1 is turned off and the second transistor Q2 is turned on, the transmitting end of the optocoupler PC1 is turned on. When the transmitting end of the optocoupler PC1 is turned on, the receiving end of the optocoupler PC1 is turned on. When the receiving end of the optocoupler PC1 is turned on, the thyristor Q3 is turned on. When the thyristor Q3 is turned on, the circuit of the overpower supply 150 and the brake 160 is turned on. At this time, the power supply of the brake 160 of the elevator normally supplies power to the brake 160.

[0062] When the elevator is in a stopped state, the data input end of the D flip-flop receives a high-level signal sent by the processing module 110. At this time, the car position detection module 120 sends a clock signal to the clock end of the D flip-flop when the elevator car moves, and the trigger module 130 outputs a high-level control signal. When the first transistor Q1 receives the high-level control signal output by the D flip-flop, the first transistor Q1 is turned on. When the first transistor Q1 is turned on, the second transistor Q2 is turned off. When the first transistor Q1 is turned on and the second transistor Q2 is turned off, the transmitting end of the optocoupler PC1 is not turned on. When the transmitting end of the optocoupler PC1 is not turned on, the receiving end of the optocoupler PC1 is not turned on. When the receiving end of the optocoupler PC1 is not turned on, the thyristor Q3 is not turned on. When the thyristor Q3 is not turned on, the circuit of the overpower supply 150 and the brake 160 is not turned on. At this time, the power supply of the brake 160 of the elevator cannot normally supply power to the brake 160. When the elevator stops running and the elevator car continues to move, the power supply to the brake 160 is disconnected, the motor of the brake 160 is locked, and the movement of the car is stopped, which solves the problem in the related art that the elevator car continues to move when the elevator stops running.

[0063] Based on the same inventive concept, an embodiment of the present application further provides an elevator control cabinet, including a control panel, on which a control circuit 100 of an elevator car is disposed, and through the control panel, the power supply state of the brake 160 is controlled.

[0064] It should be noted that the specific examples in this embodiment can refer to the examples described in the above embodiments and optional implementation modes, and will not be repeated in this embodiment.

[0065] It should be understood that the specific embodiments described herein are only used to explain the application, rather than to limit it. Based on the embodiments provided in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of this application.

[0066] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0067] Obviously, the drawings are only some examples or embodiments of the present application. For ordinary technicians in the field, the present application can also be applied to other similar situations based on these drawings without creative work. In addition, it is understandable that although the work done in this development process may be complicated and lengthy, for ordinary technicians in the field, certain changes in design, manufacturing or production based on the technical content disclosed in this application are only conventional technical means and should not be regarded as insufficient content disclosed in this application.

[0068] The term "embodiment" in this application refers to a specific feature, structure or characteristic described in conjunction with the embodiment that can be included in at least one embodiment of the present application. The appearance of this phrase in various locations in the specification does not necessarily mean the same embodiment, nor does it mean that it is mutually exclusive with other embodiments and is independent or optional. It is clearly or implicitly understood by those of ordinary skill in the art that the embodiments described in this application can be combined with other embodiments without conflict.

[0069] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of patent protection. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the attached claims.

Claims

1. A control circuit for an elevator car, characterized in that: The control circuit includes: a processing module, a car position detection module, a trigger module and a power control module; The processing module is connected to the trigger module and is used to obtain the running status information of the elevator and send the obtained running status information to the trigger module; The car position detection module is connected to the trigger module and is used to obtain a car movement signal and send the obtained car movement signal to the trigger module; The trigger module is connected to the power control module and is used to generate a control signal based on the operation status information and the car movement signal; The power control module controls the power supply state of the brake in response to the control signal.

2. The control circuit of the elevator car according to claim 1, characterized in that: The power control module includes a first switch tube connected in series between the power supply and the brake; When the processing module obtains the running state information of the elevator as being in a stopped state, the processing module sends a first level signal; The car position detection module sends an edge signal when detecting the movement of the car; When the trigger module receives the first level signal and the edge signal at the same time, it outputs a second level signal to control the first switch tube to turn off.

3. The control circuit of the elevator car according to claim 2, characterized in that: The car position detection module includes a position sensor and a frequency division module; The frequency division module is connected to the position sensor and the trigger module; The frequency division module is used to perform frequency division processing on the output signal of the position sensor to obtain a frequency division signal, and send the frequency division signal to the trigger module.

4. The control circuit of the elevator car according to claim 2, characterized in that: The power control module also includes a triode unit, which is electrically connected between the trigger module and the control end of the first switch tube. After receiving the second level signal, the triode unit controls the control end of the first switch tube to lose power.

5. The control circuit of the elevator car according to claim 4, characterized in that: The triode unit includes a first triode and a second triode; the base of the first triode is electrically connected to the trigger module; the base of the second triode is electrically connected to the collector of the first triode, the emitter of the second triode is electrically connected to the emitter of the first triode, and the control end of the first switch tube is electrically connected between the base and the collector of the second triode; when the trigger module outputs the second level signal, the first triode is turned on, the second triode is turned off, and the control end of the first switch tube loses power.

6. The control circuit of the elevator car according to claim 5, characterized in that: The power control module further comprises a driving unit, the output end of the driving unit is electrically connected to the control end of the first switch tube; the input end of the driving unit is electrically connected between the base and the collector of the second transistor.

7. The control circuit of the elevator car according to claim 6, characterized in that: The driving unit includes an optical coupler, and the optical coupler includes a transmitting end and a receiving end; the transmitting end includes an emitting diode; the anode of the emitting diode is electrically connected to the base of the second transistor, and the cathode of the emitting diode is electrically connected to the collector of the second transistor; the receiving end is electrically connected to the control end of the first switching tube.

8. The control circuit of the elevator car according to claim 7, characterized in that: A second resistor is connected between the anode of the emitting diode and the base of the second transistor, and a first resistor is connected between the cathode of the emitting diode and the collector of the second transistor; and the car position detection module supplies power to the transistor unit.

9. The control circuit of an elevator car according to claim 1, characterized in that: The operation status information of the elevator includes reset, stop and run; When the trigger module receives the reset information, the brake is controlled to be energized; When the trigger module receives the car movement signal, if the running information is received at the same time, the brake is controlled to be energized; if the stop information is received at the same time, the brake is controlled to be de-energized.

10. An elevator control cabinet, comprising a control panel, characterized in that: The control board is provided with a control circuit for the elevator car according to any one of claims 1 to 9.

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