Elevator band-type brake power supply circuit, detection method and detection device thereof and storage medium

Abstract

The invention relates to an elevator band-type brake power supply circuit, a detection method thereof, a control device and a storage medium. Comprising a power driving module, a first follow current loop, a second follow current loop, a first switch module, a second switch module, a current detection module and a band-type brake. One end of the first follow current loop is electrically connected with a power supply input and is electrically connected with the band-type brake through the first switch module, and the other end of the first follow current loop is electrically connected with a first end of the power driving module and is electrically connected with the band-type brake through the second switch module; the second end of the power driving module is electrically connected with the power input, and the third end of the power driving module is electrically connected with an elevator main control board. One end of the second follow current loop is electrically connected with the band-type brake through the current detection module, and the other end of the second follow current loop is directly and electrically connected with the band-type brake. The elevator band-type brake power supply circuit can improve the band-type brake power supply fault detection accuracy and reduce the complexity.

Description

Technical Field

[0001] The present application relates to the technical field of brake brakes, and in particular to an elevator brake power supply circuit, a detection method, a detection device and a storage medium thereof. Background Art

[0002] At present, the elevator brake power supply generally uses a constant voltage control or a constant current control method to drive the brake. The brake current of the constant current control method is generally provided with overcurrent detection, undercurrent detection, overvoltage detection or undervoltage fault. However, this kind of fault detection can only judge whether the current or voltage output by the brake power supply is normal, and cannot detect the specific fault types of the brake and the brake power supply. If it is necessary to detect the faults of the internal devices of the brake power supply, additional components need to be added for detection, resulting in a complex structure. Therefore, the current brake power supply fault detection devices and methods have the problems of low detection result accuracy and high complexity. Summary of the Invention

[0003] Based on this, in view of the above technical problems, it is necessary to provide an elevator brake power supply circuit, a detection method, a detection device and a storage medium thereof that can improve the accuracy of brake power supply fault detection and reduce complexity.

[0004] An elevator brake power supply circuit includes:

[0005] A power drive module, a first freewheeling circuit, a second freewheeling circuit, a first switch module, a second switch module, a current detection module and a brake;

[0006] One end of the first freewheeling circuit is electrically connected to the power supply input, and is electrically connected to the brake through the first switch module. The other end of the first freewheeling circuit is electrically connected to the first end of the power drive module and is electrically connected to the brake through the second switch module; the second end of the power drive module is electrically connected to the power supply input, and the third end of the power drive module is electrically connected to the elevator main control board; one end of the second freewheeling circuit is electrically connected to the brake through the current detection module, and the other end of the second freewheeling circuit is directly electrically connected to the brake;

[0007] The current detection module is used to transmit the detected brake current to the elevator main control board. The power drive module is used to receive the drive signal of the elevator main control board and adjust the turn-off or turn-on of the first end and the second end based on the drive signal; when the first end and the second end of the power drive module are turned off and the first switch module and the second switch module are turned on, the first freewheeling circuit serves as the freewheeling circuit of the brake; when the first end and the second end of the power drive module are turned off and both the first switch module and the second switch module are turned off, the second freewheeling circuit is the freewheeling circuit of the brake.

[0008] In one embodiment, the elevator brake power supply circuit further includes:

[0009] A bus capacitor, one end of the bus capacitor is electrically connected to the first freewheeling circuit, and the other end of the bus capacitor is electrically connected to the second end of the power drive module.

[0010] In one embodiment, the elevator brake power supply circuit further includes:

[0011] A rectifier bridge, both ends of the rectifier bridge are electrically connected to both ends of the bus capacitor, and the other two ends of the rectifier bridge are respectively electrically connected to the power input.

[0012] In one embodiment, the elevator brake power supply circuit further includes:

[0013] An electromagnetic interference filter, one end of the electromagnetic interference filter is respectively electrically connected to the power input and one end of the rectifier bridge, and the other end of the electromagnetic interference filter is respectively electrically connected to the power input and the other end of the rectifier bridge.

[0014] In one embodiment, the first freewheeling circuit includes a first diode freewheeling circuit, and the second freewheeling circuit includes a second diode freewheeling circuit and a freewheeling resistor.

[0015] A method for detecting an elevator brake power supply circuit, including:

[0016] Sending corresponding operation instructions for each test mode; the operation instructions are used to turn off or turn on the power drive module, the first switch module and the second switch module;

[0017] Obtaining the freewheeling time of the current detected by the current detection module passing through the brake in different test modes;

[0018] Comparing the freewheeling time with the preset time standard value of the corresponding test mode to obtain the detection result of the elevator brake power supply circuit.

[0019] In one embodiment, sending the corresponding operation instructions for each test mode among multiple test modes includes:

[0020] For the first test mode, sending an operation instruction to drive the brake with the first freewheeling circuit, turn off the power drive module, and turn on the first switch module and the second switch module;

[0021] For the second test mode, sending an operation instruction to drive the brake with the second freewheeling circuit, turn on the power drive module, and turn off the first switch module and the second switch module;

[0022] For the third test mode, send an operation instruction to drive the brake with the second freewheeling circuit, turn on the power drive module and the second switch module, and turn off the first switch module.

[0023] An elevator brake power supply circuit detection device includes:

[0024] An instruction sending module, configured to send corresponding operation instructions for each test mode; the test modes include a first test mode, a second test mode, and a third test mode; the operation instructions are used to turn off or turn on a power drive module, a first switch module, and a second switch module;

[0025] A time acquisition module, configured to acquire the freewheeling time of the current detected by the current detection module passing through the brake in different test modes;

[0026] A result judgment module, configured to compare and judge the freewheeling time with a preset time standard value of the corresponding test mode to obtain a detection result of the elevator brake power supply circuit.

[0027] An elevator main control board includes a memory and a processor. The memory stores a computer program. When the processor executes the computer program, the following steps are implemented:

[0028] Send corresponding operation instructions for each test mode; the operation instructions are used to turn off or turn on a power drive module, a first switch module, and a second switch module;

[0029] Acquire the freewheeling time of the current detected by the current detection module passing through the brake in different test modes;

[0030] Compare the freewheeling time with a preset time standard value of the corresponding test mode to obtain a detection result of the elevator brake power supply circuit.

[0031] A computer-readable storage medium stores a computer program. When the computer program is executed by a processor, the following steps are implemented:

[0032] Send corresponding operation instructions for each test mode; the operation instructions are used to turn off or turn on a power drive module, a first switch module, and a second switch module;

[0033] Acquire the freewheeling time of the current detected by the current detection module passing through the brake in different test modes;

[0034] Compare the freewheeling time with a preset time standard value of the corresponding test mode to obtain a detection result of the elevator brake power supply circuit.

[0035] The above elevator brake power supply circuit, its detection method, detection device and storage medium, through an elevator brake power supply circuit including a drive power module, a first freewheeling circuit, a second freewheeling circuit, a first switch module, a current detection module and a brake, without adding additional detection components, can control the state of the drive power module, the first switch module and the second switch module, control the brake current to pass through the first freewheeling circuit or the second freewheeling circuit, and then obtain whether a fault occurs in the elevator brake power supply and specific information about the fault according to the detection by the current detection module, thereby improving the fault detection accuracy of the elevator brake power supply and reducing the complexity of the elevator brake power supply circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0037] Figure 1 Schematic structural diagram of an elevator brake power supply circuit in an embodiment;

[0038] Figure 2 Schematic flowchart of a detection method for an elevator brake power supply circuit in an embodiment;

[0039] Figure 3 Logic schematic diagram of a brake power supply diagnosis method in another embodiment;

[0040] Figure 4 Schematic structural diagram of a freewheeling circuit when a brake power supply is operating normally in an embodiment;

[0041] Figure 5 Schematic structural diagram of a freewheeling circuit when a brake power supply is in an emergency operation mode in an embodiment;

[0042] Figure 6 Schematic block diagram of a detection device for an elevator brake power supply circuit in an embodiment;

[0043] Figure 7 Internal structure diagram of an elevator main control board in an embodiment.

[0044] Description of the reference numerals:

[0045] 101 - Power drive module, 102 - First freewheeling circuit, 103 - Second freewheeling circuit, 104 - First switch module, 105 - Second switch module, 106 - Current detection module, 107 - Brake, 108 - Bus capacitor, 109 - Rectifier bridge, 110 - Electromagnetic interference filter. Detailed implementation manners

[0046] To facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. Embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the disclosure of the present application is more thorough and comprehensive.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the specification of this application herein are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0048] It can be understood that the terms "first", "second", etc. used in this application can be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element.

[0049] Spatial relationship terms such as "under", "below", "beneath", "underneath", "above", "over", etc. can be used herein to describe the relationship between an element or feature shown in the figure and other elements or features. It should be understood that in addition to the orientation shown in the figure, spatial relationship terms also include different orientations of the device in use and operation. For example, if the device in the drawing is flipped, an element or feature described as "under other elements" or "beneath it" or "under it" will be oriented "above" other elements or features. Therefore, the exemplary terms "under" and "beneath" can include both the upper and lower orientations. In addition, the device can also include additional orientations (such as rotating 90 degrees or other orientations), and the spatial descriptors used herein are accordingly interpreted.

[0050] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediate element. In addition, in the following embodiments, "connection", if there is a transfer of electrical signals or data between the connected objects, should be understood as "electrical connection", "communication connection", etc.

[0051] As used herein, the singular forms "a", "an" and "the" may also include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprise / include" or "have" etc. specify the presence of the stated features, wholes, steps, operations, components, parts or combinations thereof, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0052] In one embodiment, as Figure 1 shown, an elevator brake power supply circuit is provided, including:

[0053] A power driving module 101, a first freewheeling circuit 102, a second freewheeling circuit 103, a first switching module 104, a second switching module 105, a current detection module 106, and a brake 107;

[0054] One end of the first freewheeling circuit 102 is electrically connected to the power input, and is electrically connected to the brake 107 through the first switching module 104. The other end of the first freewheeling circuit 102 is electrically connected to the first end of the power driving module 101, and is electrically connected to the brake 107 through the second switching module 105. The second end of the power driving module 101 is electrically connected to the power input, and the third end of the power driving module 101 is electrically connected to the elevator main control board. One end of the second freewheeling circuit 103 is electrically connected to the brake 107 through the current detection module 106, and the other end of the second freewheeling circuit 103 is directly electrically connected to the brake 107;

[0055] The current detection module 106 is used to transmit the detected brake current to the elevator main control board. The power driving module 101 is used to receive the driving signal from the elevator main control board, and based on the driving signal, adjust the turn-off or turn-on of the first end and the second end. When the first end and the second end of the power driving module 101 are turned off, and the first switching module 104 and the second switching module 105 are turned on, the first freewheeling circuit 102 serves as the freewheeling circuit of the brake 107. When the first end and the second end of the power driving module 101 are turned off, and both the first switching module 104 and the second switching module 105 are turned off, the second freewheeling circuit 103 is the freewheeling circuit of the brake 107.

[0056] Among them, the elevator brake means that when the elevator stops running, the brake will automatically hold the driving wheel of the elevator to prevent the elevator from accidentally moving at the stop position. This design can ensure the safety of passengers when the elevator stops and avoid accidents.

[0057] Among them, the current detection module 106 can be a Hall sensor; the first switching module 104 and the second switching module 105 can be normally open contacts of a contactor, normally open contacts of a relay, or power transistor electronic components such as IGBT (Insulated Gate Bipolar Transistor, a power semiconductor device) tubes. The first switching module 104 and the second switching module 105 are independent components respectively.

[0058] In the above elevator brake power supply circuit, it includes a driving power module, a first freewheeling circuit 102, a second freewheeling circuit 103, a first switching module 104, a current detection module 106, and a brake 107. Without adding additional detection components, by controlling the states of the driving power module 101, the first switching module 104, and the second switching module 105, the current passing through the brake 107 can be controlled to pass through the first freewheeling circuit 102 or the second freewheeling circuit 103. After detection by the current detection module 106, whether a fault occurs in the elevator brake power supply and the specific information of the fault can be obtained, thereby improving the fault detection accuracy of the elevator brake power supply and reducing the complexity of the elevator brake power supply circuit.

[0059] In one embodiment, as Figure 1 shown, the elevator brake power supply circuit further includes: a bus capacitor 108. One end of the bus capacitor 108 is electrically connected to the first freewheeling circuit 102, and the other end of the bus capacitor 108 is electrically connected to the second end of the power driving module 101.

[0060] In this embodiment, by introducing the bus capacitor 108 into the elevator brake power supply circuit, the inductance parameter of the line from the current detection module 106 to the power supply end is reduced, and the peak voltage of the bus is weakened.

[0061] In one embodiment, as Figure 1 shown, the elevator brake power supply circuit further includes: a rectifier bridge 109. Both ends of the rectifier bridge 109 are electrically connected to both ends of the bus capacitor 108, and the other two ends of the rectifier bridge 109 are respectively electrically connected to the power supply input.

[0062] In this embodiment, by introducing the rectifier bridge 109 into the elevator brake power supply circuit, the alternating current signal becomes a unidirectional direct current signal after passing through the rectifier bridge 109, and a stable direct current power supply can be provided.

[0063] In one embodiment, as Figure 1 shown, the elevator brake power supply circuit further includes: an electromagnetic interference filter 110. One end of the electromagnetic interference filter 110 is respectively electrically connected to the power supply input and one end of the rectifier bridge 109, and the other end of the electromagnetic interference filter 110 is respectively electrically connected to the power supply input and the other end of the rectifier bridge 109.

[0064] In this embodiment, by introducing the electromagnetic interference filter 110 into the elevator brake power supply circuit, the electromagnetic interference of the power supply line is suppressed, and the stability of the elevator brake power supply circuit is improved.

[0065] In one embodiment, as Figure 1 shown, the first freewheeling circuit 102 includes a first diode freewheeling circuit, and the second freewheeling circuit 103 includes a second diode freewheeling circuit and a freewheeling resistor.

[0066] In one embodiment, as Figure 2 shown, a method for detecting an elevator brake power supply circuit is provided, and the method includes:

[0067] Step S201: Send corresponding operation instructions for each test mode.

[0068] Among them, the operation instructions are used to turn off or turn on the power drive module 101, the first switch module 104, and the second switch module 105.

[0069] Optionally, when it is determined that the elevator power supply is operating normally and the elevator is in an idle state, the main control board sends operation instructions corresponding to each test mode through the power drive module 101.

[0070] Step S202: Obtain the freewheeling time of the current detected by the current detection module 106 passing through the brake 107 in different test modes.

[0071] Among them, the freewheeling time refers to the time period from when the first switch module 104 and / or the second switch module 105 is turned off to when the current detection module 106 detects that the current passing through the brake 107 is 0.

[0072] Optionally, the main control board obtains the freewheeling time from when the first switch module 104 and / or the second switch module 105 is turned off to when the current detection module 106 detects that the current passing through the brake 107 is 0 in different detection modes.

[0073] Step S203: Compare the freewheeling time with the preset time standard value of the corresponding test mode to obtain the detection result of the elevator brake power supply circuit.

[0074] Among them, the detection result includes whether there is a fault in the elevator brake power supply circuit, the specific components with faults, and the fault types.

[0075] Optionally, the main control board compares the freewheeling time with the time standard value preset for the corresponding test mode to obtain the detection result of the elevator brake power supply circuit. For example, in the first test mode, the detected freewheeling time is compared with the time standard value preset for the first test mode. If the freewheeling time is less than or equal to the preset time standard value, the detection result is that the elevator brake power supply circuit is operating normally. If the freewheeling time is greater than the preset time standard value, the detection result is that there is an abnormal fault in the brake 107 of the elevator brake power supply circuit. When the result of the first test mode shows that the brake 107 is normal, the second test mode is carried out. The detected freewheeling time is compared with the two time standard values preset for the second test mode. When the freewheeling time is less than or equal to the first preset time standard value, the detection result is that the brake 107 is normal. When the freewheeling time is greater than the first preset time standard value and less than or equal to the second preset time standard value, the detection result is that there is an abnormality in the freewheeling resistor of the second freewheeling circuit 103. When the freewheeling time is greater than the second preset time standard value, the detection result is that the freewheeling resistor of the second freewheeling circuit 103 is short-circuited. When the detection result of the second test mode shows that the brake 107 is normal, the third test mode is carried out. The detected freewheeling time is compared with the two time standard values of the third test mode. When the freewheeling time is less than or equal to the first preset time standard value, the detection result is that the brake 107 is normal. When the freewheeling time is greater than the first preset time standard value and less than or equal to the second preset time standard value, the detection result is that there is an abnormality in the freewheeling resistor of the second freewheeling circuit 103. When the freewheeling time is greater than the second preset time standard value, the detection result is that the first switch module 104 is short-circuited, and whether the second switch module 105 is short-circuited is detected in the same way.

[0076] In this embodiment, the main control board sends corresponding operation instructions in different test modes, obtains the freewheeling time detected by the current detection module 106, and compares the freewheeling time with the time standard value preset for the corresponding test mode, so as to obtain the detection result. The detection result includes the faulty component and the fault type, thus improving the detection accuracy of the elevator brake power supply circuit.

[0077] In one embodiment, step S201 sends corresponding operation instructions for each test mode among multiple test modes, including:

[0078] Among them, the test modes include the first test mode, the second test mode, and the third test mode.

[0079] For the first test mode, send an operation instruction to drive the brake 107 with the first freewheeling circuit 102, turn off the power drive module 101, and turn on the first switch module 104 and the second switch module 105; for the second test mode, send an operation instruction to drive the brake 107 with the second freewheeling circuit 103, turn on the power drive module 101, and turn off the first switch module 104 and the second switch module 105; for the third test mode, send an operation instruction to drive the brake 107 with the second freewheeling circuit 103, turn on the power drive module 101 and the second switch module 105, and turn off the first switch module 104.

[0080] Optionally, for the first test mode, send an operation instruction to drive the brake 107 with the first freewheeling circuit 102. After the brake 107 is opened, turn off the power drive module 101 and keep the first switch module 104 and the second switch module 105 turned on; when the detection result of the first test mode shows that the brake 107 is normal, for the second test mode, send an operation instruction to drive the brake 107 with the second freewheeling circuit 103. After the brake 107 is opened, keep the power drive module 101 turned on and turn off the first switch module 104 and the second switch module 105; when the detection result of the second test mode shows that the brake 107 is normal, send an operation instruction to drive the brake 107 with the second freewheeling circuit 103. After the brake 107 is opened, keep the power drive module 101 and the second switch module 105 turned on and turn off the first switch module 104.

[0081] In this embodiment, by sending corresponding operation instructions in different test modes to indicate the power drive module 101, the first switch module 104, and the second switch module 105 to be turned on and off in different test modes, the components and types of faults that cause failures are detected, further improving the accuracy of the detection results.

[0082] In one embodiment, a method for diagnosing a brake power supply is provided. As Figure 3 shown, a logic schematic diagram of the brake power supply diagnosis method is provided, specifically including:

[0083] After the elevator is installed, debugged, and running normally, operate according to test mode 1: drive the brake with a test current I0. After the brake is normally opened, turn off the power drive module and keep switch module 1 and switch module 2 closed. Record the time from turning off the power drive module to the current detection module detecting that the brake current is 0, and set it as T0; when the elevator is idle, perform a brake test according to test mode 1 and record the test time T1. If |T1 - T0| ≤ T10, then it is determined that the brake is normal; if |T1 - T0| > T10, it is determined that the brake is abnormal, and an abnormal brake fault is output.

[0084] After the elevator is installed, debugged and running normally, and the brake is detected to be normal, it runs in test mode 2 to test the current I01 to drive the brake. After the brake is normally opened, keep the power drive module closed, turn off switch module 1 and switch module 2, and record the time from turning off switch module 1 and 2 to the time when the current detection module detects that the brake current is 0, which is set as T01; when the elevator is idle, conduct a brake test in test mode 2 and record the test time T2. If |T2 - T01| ≤ T21, it is determined that the brake is normal; if T22 ≥ |T21 - T01| > T21, it is determined that the second freewheeling circuit is abnormal, the freewheeling resistor is abnormal, and a brake abnormal fault is output; |T21 - T01| > T22, it is determined that there is a short circuit in the freewheeling resistor of the second freewheeling circuit, and a fault message is output.

[0085] When it is determined that there is no short circuit in the freewheeling resistor, run in test mode 3: when the elevator is idle, drive the brake with test current I01. After the brake is normally opened, keep the power drive module and switch module 2 closed, turn off switch module 1, and record the time from turning off switch module 1 to the time when the current detection module detects that the brake current is 0, and record the test time T3. If |T3 - T01| ≤ T31, it is determined that the brake is normal; if T32 ≥ |T31 - T01| > T31, it is determined that the second freewheeling circuit is abnormal, the freewheeling resistor is abnormal, and a brake abnormal fault is output; |T31 - T01| > T32, it is determined that there is a short circuit in switch module 1 and a fault message is output. Test whether there is a short circuit in switch module 2 in the same way.

[0086] Among them, T10, T21, T22, T31 and T32 are set values in each test mode; switch module 1 and switch module 2 are equivalent to the first switch module 104 and the second switch module 105 in the above embodiment; the schematic diagram of the freewheeling circuit structure of the brake power supply during normal operation is as Figure 4 shown, and the schematic diagram of the freewheeling circuit structure of the brake power supply in the emergency operation mode is as Figure 5 shown.

[0087] In this embodiment, no additional components and devices are required, and it can diagnose whether there are abnormalities in the freewheeling circuit and switch components of the brake and the brake power supply.

[0088] It should be understood that although the steps in the flowcharts involved in the above-described embodiments are sequentially shown according to the indications of the arrows, these steps are not necessarily executed sequentially in the order indicated by the arrows. Unless there is a clear indication in this article, the execution of these steps has no strict order limit, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-described embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be executed alternately or alternately with at least a part of other steps or steps or stages in other steps.

[0089] Based on the same inventive concept, an embodiment of the present application also provides an elevator brake power circuit detection device for implementing the elevator brake power circuit detection method described above. The solution provided by this device to solve the problem is similar to the solution described in the above method. Therefore, the specific limitations in one or more embodiments of the elevator brake power circuit detection device provided below can refer to the limitations on the elevator brake power circuit detection method in the above text, and will not be repeated here.

[0090] In one embodiment, as Figure 6 shown, an elevator brake power circuit detection device 600 is provided, including: an instruction sending module 601, a time acquisition module 602, and a result judgment module 603, where:

[0091] The instruction sending module 601 is configured to send corresponding operation instructions for each test mode; the operation instructions are used to turn off or turn on the power drive module, the first switch module, and the second switch module.

[0092] The time acquisition module 602 is configured to acquire the freewheeling time of the current detected by the current detection module passing through the brake in different test modes.

[0093] The result judgment module 603 is configured to compare and judge the freewheeling time with the preset time standard value of the corresponding test mode to obtain the detection result of the elevator brake power circuit.

[0094] Further, in one embodiment, the instruction sending module 601 is further configured to, for the first test mode, send an operation instruction to drive the brake with the first freewheeling circuit, turn on the power drive module, and turn off the first switch module and the second switch module; for the second test mode, send an operation instruction to drive the brake with the second freewheeling circuit, turn on the power drive module, and turn off the first switch module and the second switch module; for the third test mode, send an operation instruction to drive the brake with the second freewheeling circuit, turn on the power drive module and the second switch module, and turn off the first switch module.

[0095] Each module in the above elevator brake power circuit detection device 600 can be implemented in whole or in part by software, hardware, and their combination. Each of the above modules can be embedded in or independent of the processor in the computer device in the form of hardware, or stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to each of the above modules.

[0096] In one embodiment, a computer device is provided. The computer device can be a server, and its internal structure diagram can be as Figure 7 shown. The computer device includes a processor, a memory, and a network interface connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store the current value from the current detection module and the freewheeling circuit time data. The network interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, it implements an elevator brake power circuit detection method.

[0097] Those skilled in the art can understand that Figure 7 the structure shown in

[0098] is only a block diagram of some structures related to the solution of this application, and does not constitute a limitation on the computer device to which the solution of this application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine some components, or have different component arrangements.

[0099] In one embodiment, a computer device is further provided, including a memory and a processor. A computer program is stored in the memory, and when the processor executes the computer program, the steps in the above method embodiments are implemented.

[0100] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by the processor, the steps in the above method embodiments are implemented.

[0101] 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 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, and the collection, use, and processing of relevant data need to comply with the relevant laws, regulations, and standards of relevant countries and regions.

[0102] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, database, or other medium used in the embodiments provided in this application can include at least one of non-volatile and volatile memories. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The databases involved in the embodiments provided in this application can include at least one of relational databases and non-relational databases. Non-relational databases can include distributed databases based on blockchain, etc., without limitation. The processors involved in the embodiments provided in this application can be general-purpose processors, central processors, graphics processors, digital signal processors, programmable logic devices, data processing logics based on quantum computing, etc., without limitation.

[0103] In the description of this specification, the descriptions referring to terms such as "some embodiments", "other embodiments", "ideal embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

[0104] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0105] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. An elevator brake power supply circuit, characterized in that, The elevator brake power supply circuit includes: A power drive module, a first freewheeling circuit, a second freewheeling circuit, a first switch module, a second switch module, a current detection module, and a brake; One end of the first freewheeling circuit is electrically connected to the power supply input, and is electrically connected to the brake through the first switch module. The other end of the first freewheeling circuit is electrically connected to the first end of the power drive module and is electrically connected to the brake through the second switch module. The second end of the power drive module is electrically connected to the power supply input, and the third end of the power drive module is electrically connected to the elevator main control board. One end of the second freewheeling circuit is electrically connected to the brake through the current detection module, and the other end of the second freewheeling circuit is directly electrically connected to the brake; The current detection module is used to transmit the detected brake current to the elevator main control board. The power drive module is used to receive the drive signal from the elevator main control board and adjust the turn-off or turn-on of the first end and the second end based on the drive signal. When the first end and the second end of the power drive module are turned off and the first switch module and the second switch module are turned on, the first freewheeling circuit serves as the freewheeling circuit of the brake. When the first end and the second end of the power drive module are turned off and both the first switch module and the second switch module are turned off, the second freewheeling circuit is the freewheeling circuit of the brake.

2. The elevator brake power supply circuit according to claim 1, wherein The elevator brake power supply circuit further includes: A bus capacitor, one end of the bus capacitor is electrically connected to the first freewheeling circuit, and the other end of the bus capacitor is electrically connected to the second end of the power drive module.

3. The elevator brake power supply circuit according to claim 2, wherein The elevator brake power supply circuit further includes: A rectifier bridge, both ends of the rectifier bridge are electrically connected to both ends of the bus capacitor respectively, and the other two ends of the rectifier bridge are electrically connected to the power supply input respectively.

4. The elevator brake power supply circuit according to any one of claims 1 to 3, characterized in that, The elevator brake power supply circuit further includes: An electromagnetic interference filter, one end of the electromagnetic interference filter is electrically connected to the power supply input and one end of the rectifier bridge respectively, and the other end of the electromagnetic interference filter is electrically connected to the power supply input and the other end of the rectifier bridge respectively.

5. The elevator brake power supply circuit according to claim 1, characterized in that, The first freewheeling circuit includes a first diode freewheeling circuit, and the second freewheeling circuit includes a second diode freewheeling circuit and a freewheeling resistor.

6. A method for detecting an elevator brake power supply circuit, characterized in that, Applied to the elevator main control board, the elevator main control board is electrically connected to the elevator brake power supply circuit according to claims 1 to 5; the method includes: Sending corresponding operation instructions for each test mode among multiple test modes; the operation instructions are used to turn off or turn on the power drive module, the first switch module, and the second switch module; Obtaining the freewheeling time of the current detected by the current detection module passing through the brake in different test modes; Comparing the freewheeling time with the preset time standard value of the corresponding test mode to obtain the detection result of the elevator brake power supply circuit.

7. The elevator brake power supply circuit detection method according to claim 6, wherein The test modes include a first test mode, a second test mode, and a third test mode; sending corresponding operation instructions for each test mode among multiple test modes includes: For the first test mode, send an operation instruction to drive the brake with the first freewheeling circuit, turn off the power drive module, and turn on the first switch module and the second switch module; For the second test mode, send an operation instruction to drive the brake with the second freewheeling circuit, turn on the power drive module, and turn off the first switch module and the second switch module; For the third test mode, send an operation instruction to drive the brake with the second freewheeling circuit, turn on the power drive module and the second switch module, and turn off the first switch module.

8. An elevator brake power supply circuit detection device, characterized in that, Applied to the elevator main control board, the elevator main control board is electrically connected to the elevator brake power supply circuit according to claims 1 to 5; comprising: An instruction sending module, configured to send corresponding operation instructions for each test mode; the operation instructions are used to turn off or turn on the power drive module, the first switch module and the second switch module; A time acquisition module, configured to acquire the freewheeling time of the current detected by the current detection module passing through the brake in different test modes; A result judgment module, configured to compare and judge the freewheeling time with a preset time standard value of the corresponding test mode to obtain the detection result of the elevator brake power supply circuit.

9. An elevator main control board, comprising a memory and a processor, the memory storing a computer program, characterized in that, When the processor executes the computer program, the steps of the method according to any one of claims 6 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, the steps of the method according to any one of claims 6 to 7 are implemented.

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