Brake power supply control system detection method and device

Abstract

The invention relates to a brake power supply control system detection method and device and a brake coil power supply control circuit. The method comprises the steps that in the process of supplying power to a brake coil, the power supply to the brake coil is periodically cut off by periodically switching the on-off state of a semiconductor switch on a power supply loop; acquiring actual voltage and actual current of the follow current module when power supply is cut off; whether the semiconductor switch works in a specification range or whether the resistance value of the follow current module is abnormal can be judged according to the actual voltage and the actual current, if the semiconductor switch does not work in the specification range or the resistance value of the follow current module is abnormal, a protection action is executed, and the brake power supply control system is prevented from breaking down. Power supply of a brake coil can be successfully cut off, so that normal operation of a brake power supply control system is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of brake coils, and particularly to a method and device for detecting a brake power supply control system and a brake coil power supply control circuit. Background Art

[0002] A brake coil is a commonly used device, which is widely used in various mechanical equipment, electrical equipment, and transportation vehicles, and is mainly used to control the start and stop of various equipment.

[0003] In the traditional technology, semiconductor elements are connected in series to the power supply loop of the brake coil to control the power supply of the brake coil. When the semiconductor element loses power, the power supply of the brake coil is cut off, and a freewheeling resistor is used for freewheeling to quickly release the energy stored in the brake coil. The release speed of the energy stored in the brake coil is related to the resistance value of the freewheeling resistor. The larger the resistance value, the faster the release speed.

[0004] However, the larger the resistance value of the freewheeling resistor, the higher the back electromotive force generated by the brake coil when the semiconductor element loses power, and the semiconductor element needs to have a sufficiently high withstand voltage to successfully cut off the power supply of the brake coil. As the usage time increases, the resistance value of the freewheeling resistor may increase, which will cause the back electromotive force generated by the brake coil to further increase when the semiconductor element loses power, and a semiconductor element with a higher withstand voltage capacity is required. Otherwise, the power supply of the brake coil cannot be successfully cut off, and the higher the withstand voltage capacity of the semiconductor switch element, the higher the cost and the more difficult the device selection. Summary of the Invention

[0005] Based on this, in view of the above technical problems, it is necessary to provide a method and device for detecting a brake power supply control system and a brake coil power supply control circuit that can detect whether a semiconductor switch works within the specification range or whether the resistance value of a freewheeling module is abnormal.

[0006] In a first aspect, the present application provides a method for detecting a brake power supply control system, including:

[0007] During the power supply process to the brake coil, periodically switch the on-off state of the semiconductor switch in the power supply loop to periodically disconnect the power supply to the brake coil;

[0008] Obtain the actual voltage and actual current of the freewheeling module when the power supply is disconnected;

[0009] If it is determined according to the actual voltage and actual current that the semiconductor switch does not work within the specification range or the resistance value of the freewheeling module is abnormal, then perform a protection action.

[0010] In one embodiment, the step of determining that the resistance value of the freewheeling module is abnormal according to the actual voltage and actual current includes:

[0011] If the ratio of the actual voltage to the nominal resistance value exceeds the preset current range, it is determined that the current detection circuit is abnormal.

[0012] In one embodiment, the steps of judging the abnormal resistance value of the freewheeling module according to the actual voltage and the actual current include:

[0013] If the product of the actual current and the nominal resistance value exceeds the preset voltage range, it is determined that the voltage detection circuit is abnormal.

[0014] In one embodiment, the steps of judging the abnormal resistance value of the freewheeling module according to the actual voltage and the actual current include:

[0015] If the ratio of the actual voltage to the actual current exceeds the preset resistance range, it is judged that the resistance value of the freewheeling module is abnormal, where the lower limit value of the preset resistance range is the minimum resistance value that meets the braking speed requirement of the brake coil, and the upper limit value of the preset resistance range is the maximum resistance value allowed under normal power supply.

[0016] In one embodiment, the steps of judging that the semiconductor switch does not work within the specification range according to the actual voltage and the actual current include:

[0017] If the actual voltage is greater than or equal to the preset voltage, it is judged that the semiconductor switch does not work in the target voltage range, and the preset voltage is the product of the maximum voltage value that the semiconductor switch can withstand and the first preset derating factor.

[0018] In one embodiment, the steps of judging that the semiconductor switch does not work within the specification range according to the actual voltage and the actual current include:

[0019] If the actual current is greater than or equal to the preset current, it is judged that the semiconductor switch does not work in the target current range, and the preset current is the product of the maximum current value that the semiconductor switch can withstand and the second preset derating factor.

[0020] In one embodiment, performing a protection action includes at least one of the following steps:

[0021] Cut off the power supply to the brake coil;

[0022] Turn off the semiconductor switch.

[0023] In a second aspect, the present application also provides a detection device for a brake power supply control system, including:

[0024] A periodic detection trigger module, configured to periodically switch the on-off state of the semiconductor switch on the power supply loop during the power supply process to the brake coil, so as to periodically cut off the power supply to the brake coil;

[0025] A parameter acquisition module acquires the actual voltage and actual current of the freewheeling module when the power supply is disconnected.

[0026] A protection module performs a protection action if it is determined, based on the actual voltage and actual current, that the semiconductor switch is not operating within the specified range or the resistance value of the freewheeling module is abnormal.

[0027] Thirdly, the present application also provides a brake coil power supply control circuit, including:

[0028] A power supply module, the output end of which is used to connect to the brake coil to provide the operating voltage for the brake coil;

[0029] A switch module, which is arranged on the power supply loop of the power supply module and the brake coil;

[0030] A freewheeling module, the two connection ends of which are respectively connected to the two power supply ends of the brake coil in correspondence;

[0031] A voltage detection device, the two connection ends of which are respectively connected to the two connection ends of the freewheeling module in correspondence, and is used to acquire the actual voltage of the freewheeling module;

[0032] A current detection device, which is arranged on the loop formed by the freewheeling module and the brake coil, and is used to acquire the actual current of the freewheeling module;

[0033] A controller, which is respectively connected to the voltage detection device, the current detection device, the switch module, and the power supply module, and the controller is used to execute the steps of any one of the above-mentioned brake power supply control system detection methods.

[0034] In one embodiment, the switch module includes:

[0035] A first semiconductor switch, the input end of which is connected to the positive output end of the power supply module, and the output end of which is used to connect to the positive input end of the brake coil; or, the input end of the first semiconductor switch is used to connect to the negative input end of the brake coil, and the output end of the first semiconductor switch is connected to the negative output end of the power supply module;

[0036] And / or,

[0037] A second semiconductor switch, the input end of which is connected to the positive output end of the power supply module, and the output end of which is used to connect to the positive input end of the brake coil; or, the input end of the second semiconductor switch is used to connect to the negative input end of the brake coil, and the output end of the second semiconductor switch is connected to the negative output end of the power supply module.

[0038] In one embodiment, the power supply module includes:

[0039] A first rectifier bridge and a third semiconductor switch. The first side of the first rectifier bridge is used to connect to an AC power supply, the second side of the first rectifier bridge is connected to a switch module, the third semiconductor switch is arranged on the power supply loop between the second side of the first rectifier bridge and the switch module, and the third semiconductor switch is used to switch between a conducting state and a non-conducting state to adjust the current input to the brake coil to the rated current of the brake coil;

[0040] Or,

[0041] A second rectifier bridge, a fourth semiconductor switch and a transformer. The first side of the second rectifier bridge is used to connect to an AC power supply, the second side of the second rectifier bridge is connected to the primary side of the transformer, the secondary side of the transformer is connected to the switch module, and the fourth semiconductor switch is arranged on the power supply loop between the second side of the second rectifier bridge and the secondary side of the transformer; the fourth semiconductor switch is used to switch between a conducting state and a non-conducting state to adjust the voltage input to the brake coil to the operating voltage of the brake.

[0042] In the above brake power supply control system detection method, device and brake coil power supply control circuit, during the process of supplying power to the brake coil, by periodically switching the on-off state of the semiconductor switch on the power supply loop, the power supply to the brake coil is periodically disconnected; the actual voltage and actual current of the freewheeling module when the power supply is disconnected are obtained; according to the actual voltage and actual current, it can be judged whether the semiconductor switch works within the specification range or whether the resistance value of the freewheeling module is abnormal. If the semiconductor switch does not work within the specification range or the resistance value of the freewheeling module is abnormal, a protection action is executed to avoid faults in the brake power supply control system, ensure that the power supply to the brake coil can be successfully cut off, and ensure the normal operation of the brake power supply control system. Description of the Drawings

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments or related technologies. 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 also be obtained based on these drawings.

[0044] Figure 1 It is an application environment diagram of the brake power supply control system detection method in an embodiment;

[0045] Figure 2 It is a flow schematic diagram of the brake power supply control system detection method in an embodiment;

[0046] Figure 3 It is a structural block diagram of the brake power supply control system detection device in an embodiment;

[0047] Figure 4 One of the structural block diagrams of the power supply module of the brake coil power supply control circuit in an embodiment;

[0048] Figure 5 The structural block diagram of the reverse series semiconductor switch combination in an embodiment;

[0049] Figure 6 One of the structural block diagrams of the power supply module of the brake coil power supply control circuit in an embodiment;

[0050] Figure 7 The internal structure diagram of a computer device in an embodiment. Detailed implementation manners

[0051] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0052] The brake power supply control system detection method provided by the embodiments of the present application can be applied to an application environment as Figure 1 shown. During the power supply process to the brake coil 102, the on-off states of the first semiconductor switch 1042 and / or the second semiconductor switch 1044 on the power supply loop are periodically switched. The actual voltage of the freewheeling module 110 when the power supply is disconnected can be obtained through the voltage detection device 106, and the actual current of the freewheeling module 110 when the power supply is disconnected can be obtained through the current detection device 108. According to the actual voltage and the actual current, it can be determined whether the first semiconductor switch 1042 and / or the second semiconductor switch 1044 work within the specification range, or whether the resistance value of the freewheeling module 110 is abnormal. If the first semiconductor switch 1042 and / or the second semiconductor switch 1044 do not work within the specification range, or the resistance value of the freewheeling module 110 is abnormal, a protection action is executed to avoid a failure of the brake power supply control system, ensure that the power supply to the brake coil 102 can be successfully cut off, and guarantee the normal operation of the brake power supply control system.

[0053] In an exemplary embodiment, as Figure 2 shown, a brake power supply control system detection method is provided, including:

[0054] S202, during the power supply process to the brake coil, periodically switch the on-off states of the semiconductor switches on the power supply loop to periodically disconnect the power supply to the brake coil.

[0055] During the power supply process to the brake coil, the on-off state of the semiconductor switch on the power supply loop can be periodically switched, and the cut-off time each time can be any duration, such as one time base. This time can be adjusted and set according to the timer in the brake power supply control system to obtain a reasonable cut-off time, avoid the difficulty of the brake power supply control system to be reconnected for a long time in the power-off state, and improve the stability of the brake power supply control system.

[0056] As Figure 1 shown, by cutting off the semiconductor switch on the power supply loop, the current of the brake coil can be directed to the freewheeling module. At this time, the voltage detection device 106 can obtain the actual voltage of the freewheeling module 110.

[0057] The energy release speed of the brake coil storage is related to the resistance value of the freewheeling module. The larger the resistance value, the faster the release speed. However, the larger the resistance value of the freewheeling module, when the semiconductor component is powered off, the back electromotive force generated by the brake coil is higher, and the semiconductor component needs to have a high enough withstand voltage to successfully cut off the power supply of the brake coil. As the use time increases, the resistance value of the freewheeling module may increase, which will cause the back electromotive force generated by the brake coil to further increase when the semiconductor component is powered off. In order to ensure that the change of the resistance value of the freewheeling module is within a controllable range, by periodically switching the on-off state of the semiconductor switch on the power supply loop, the resistance value of the freewheeling module can be periodically detected whether it is too large, avoiding the back electromotive force generated by the brake coil from being too high, ensuring that the power supply of the brake coil can be successfully cut off, and guaranteeing the normal operation of the brake power supply control system.

[0058] S204, obtain the actual voltage and actual current of the freewheeling module when the power supply is disconnected.

[0059] The actual voltage can be detected and obtained by a voltage detection device. The voltage detection device receives the voltage signal in the circuit and converts it into a corresponding electrical signal, and can perform signal processing such as amplification, filtering, and modulation on this point signal. According to the processed signal, a corresponding signal or indication can be output for subsequent use. The voltage detection device performs signal processing on the point signal, which can improve the reliability and stability of the signal, ensure that the generated signal or indication has a high credibility and quality, and improve the reliability and stability of the brake power supply control system.

[0060] The above voltage detection device can be of types such as a voltage indicator, a voltage monitor, a voltage recorder, a voltage protector, a voltage sensor, etc. The specific selection of the voltage detection device can be determined according to performance requirements such as the accuracy requirements of the brake power supply control system.

[0061] The actual current can be detected by a current detection device. By receiving the current signal in the circuit and converting it into a corresponding electrical signal, the current detection device can perform signal processing on this point signal, such as amplification, filtering, modulation, etc. According to the processed signal, it can output a corresponding signal or indication for subsequent use. The current detection device performs signal processing on the point signal, which can improve the reliability and stability of the signal, ensure that the generated signal or indication has high credibility and quality, and improve the reliability and stability of the brake power supply control system.

[0062] The above-mentioned current detection device can be of types such as current indicator, current monitor, current recorder, current protector, current sensor, etc. The specific selection of the current detection device can be determined according to performance requirements such as the accuracy requirements of the brake power supply control system.

[0063] S206, if it is determined according to the actual voltage and actual current that the semiconductor switch is not operating within the specification range, or the resistance value of the freewheeling module is abnormal, then a protection action is executed.

[0064] During the power supply to the brake coil, by periodically switching the on / off state of the semiconductor switch in the power supply circuit, the power supply to the brake coil is periodically disconnected; the actual voltage and actual current of the freewheeling module when the power supply is disconnected are obtained; according to the actual voltage and actual current, it can be determined whether the semiconductor switch is operating within the specification range, or whether the resistance value of the freewheeling module is abnormal. If the semiconductor switch is not operating within the specification range, or the resistance value of the freewheeling module is abnormal, then a protection action is executed to avoid faults in the brake power supply control system, ensure that the power supply to the brake coil can be successfully cut off, and guarantee the normal operation of the brake power supply control system.

[0065] In an exemplary embodiment, the step of determining that the resistance value of the freewheeling module is abnormal according to the actual voltage and actual current includes:

[0066] If the ratio of the actual voltage to the nominal resistance value exceeds the preset current range, then it is determined that the current detection circuit is abnormal.

[0067] The nominal resistance value refers to a resistance value specified in the design or specification of the freewheeling module. The specific nominal resistance value can vary according to different freewheeling modules. When using the freewheeling module, an appropriate freewheeling module should be selected according to the actual application requirements and circuit characteristics to obtain a nominal resistance value suitable for the circuit characteristics.

[0068] In practical applications, the nominal resistance value of the freewheeling module may deviate from the theoretical value of the nominal resistance due to the temperature of the application environment and the subtle influence of different application circuits. Therefore, in the brake power supply control system, the influence of the above factors should be considered, and a preset current range should be set accordingly. The preset current range can be a current range that fluctuates up and down by a certain value centered on the ratio of the actual voltage to the theoretical value of the nominal resistance. Specifically, the preset current range can be a current range that fluctuates up and down by 5% centered on the ratio of the actual voltage to the theoretical value of the nominal resistance. Of course, the preset current range can also be other current ranges, which can be specifically determined according to the performance requirements of the brake power supply control system.

[0069] When the ratio of the actual voltage to the nominal resistance is within the preset current range, it is considered that the current detection circuit is operating normally at this time; when the ratio of the actual voltage to the nominal resistance exceeds the preset current range, it is considered that there is an abnormal situation in the current detection circuit at this time. By setting the preset current range, the brake power supply control system can be within a reliable deviation range, avoiding faults in the brake power supply control system. At this time, a protection action can be executed to improve the reliability and safety of the brake power supply control system.

[0070] In an exemplary embodiment, the steps of determining the abnormal resistance value of the freewheeling module according to the actual voltage and actual current include:

[0071] If the product of the actual current and the nominal resistance exceeds the preset voltage range, it is determined that the voltage detection circuit is abnormal.

[0072] Similar to the preset current range, in practical applications, the nominal resistance value of the freewheeling module may deviate from the theoretical value of the nominal resistance due to the temperature of the application environment and the subtle influence of different application circuits. Therefore, in the brake power supply control system, the influence of the above factors should be considered, and a preset voltage range should be set accordingly. The preset voltage range can be a voltage range that fluctuates up and down by a certain value centered on the product of the actual current and the theoretical value of the nominal resistance. Specifically, the preset voltage range can be a voltage range that fluctuates up and down by 10% centered on the product of the actual current and the theoretical value of the nominal resistance. Of course, the preset voltage range can also be other voltage ranges, which can be specifically determined according to the performance requirements of the brake power supply control system.

[0073] When the product of the actual current and the nominal resistance value is within the preset voltage range, it is considered that the voltage detection circuit is operating normally at this time; when the product of the actual current and the nominal resistance value exceeds the preset voltage range, it is considered that there is an abnormal situation in the voltage detection circuit at this time. By setting the preset voltage range, the brake power supply control system can be within a reliable deviation range, avoiding faults in the brake power supply control system. At this time, a protection action can be executed to improve the reliability and safety of the brake power supply control system.

[0074] In an exemplary embodiment, the step of judging the abnormal resistance value of the freewheeling module according to the actual voltage and the actual current includes:

[0075] If the ratio of the actual voltage to the actual current exceeds the preset resistance value range, it is judged that the resistance value of the freewheeling module is abnormal, where the lower limit value of the preset resistance value range is the minimum resistance value that meets the brake speed requirement of the brake coil, and the upper limit value of the preset resistance value range is the maximum resistance value allowed under normal power supply.

[0076] The preset resistance value range refers to a range that fluctuates up and down with the preset resistance value as the center. This preset resistance value is the maximum resistance value allowed for the freewheeling module. The preset resistance value depends on the specific application environment and equipment requirements. Specifically, this preset resistance value is related to data in dimensions such as the working environment temperature and the performance of the freewheeling module. Therefore, it is necessary to determine this preset resistance value according to the required freewheeling effect and circuit characteristics.

[0077] When the ratio of the actual voltage to the actual current is lower than the preset resistance value range, it will cause the current decay of the brake coil to be slow and the brake release speed to be slow; when the ratio of the actual voltage to the actual current is higher than the preset resistance value range, it will cause the working range of the power supply device or power supply module in the system to be exceeded, that is, it is not operating within the specification range. Therefore, it is necessary to set a suitable preset resistance value range to ensure the normal operation of the brake power supply control system

[0078] The release speed of the energy stored in the brake coil is related to the preset resistance value range of the freewheeling resistor. The larger the lower limit value of the preset resistance value range, the faster the release speed. To increase the release speed of the energy stored in the brake coil, it should be ensured that the ratio of the actual voltage to the actual current is greater than the lower limit value of the preset resistance value range. The preset resistance value range can be stored in the controller of the brake power supply control system. When the ratio of the actual voltage to the actual current exceeds the preset resistance value range, it is determined that the resistance value of the freewheeling module is abnormal. To avoid faults in the brake power supply control system, a protection action can be executed at this time to improve the reliability and safety of the brake power supply control system.

[0079] In an exemplary embodiment, the step of judging that the semiconductor switch is not operating within the specification range according to the actual voltage and the actual current includes:

[0080] If the actual voltage is greater than or equal to the preset voltage, it is determined that the semiconductor switch is not operating within the target voltage range, and the preset voltage is the product of the maximum voltage value that the semiconductor switch can withstand and the first preset derating factor.

[0081] The preset voltage is the product of the maximum voltage value that the semiconductor switch can withstand and the first preset derating factor. Based on this preset voltage, voltage breakdown of the semiconductor switch can be avoided, ensuring that the semiconductor switch operates within the specification range, guaranteeing the safe use of the semiconductor switch, and extending the service life of the semiconductor switch.

[0082] The first preset derating factor can be any value. To reduce the risk of voltage breakdown of the semiconductor switch, the first preset derating factor can be set to a value less than 1. Of course, the specific determination of the first preset derating factor also needs to be based on the selection of the semiconductor switch. For example, when the selected semiconductor switch is an insulated gate bipolar transistor of the 1200V level, it means that the highest voltage that the semiconductor switch can withstand is 1200V. At this time, the first preset derating factor can be set to 0.9 to maximize the balance between the safety and voltage withstand limit of the semiconductor switch and improve the performance of the semiconductor switch. Of course, the above example is only for illustration and does not limit the specific selection of the semiconductor switch and the determination of the first preset derating factor.

[0083] In an exemplary embodiment, the step of determining that the semiconductor switch is not operating within the specification range based on the actual voltage and the actual current includes:

[0084] If the actual current is greater than or equal to the preset current, it is determined that the semiconductor switch is not operating within the target current range, and the preset current is the product of the maximum current value that the semiconductor switch can withstand and the second preset derating factor.

[0085] If the actual current is greater than or equal to the preset current, it is determined that the semiconductor switch is not operating within the target current range, and the preset current is the product of the maximum current value that the semiconductor switch can withstand and the second preset derating factor.

[0086] The preset current is the product of the maximum current value that the semiconductor switch can withstand and the second preset derating factor. Based on this preset current, the situation of overcurrent in the semiconductor switch can be avoided. If the semiconductor switch operates in an overcurrent state for a long time, it will accelerate the loss of the semiconductor switch and even cause it to fail. Therefore, setting an appropriate preset current can ensure that the semiconductor switch operates within the specification range, guarantee the safe use of the semiconductor switch, and extend the service life of the semiconductor switch.

[0087] The second preset derating factor can be any value. To reduce the risk of overcurrent in the semiconductor switch, the second preset derating factor can be set to a value less than 1. Of course, the specific determination of the second preset derating factor also needs to be determined according to the selection of the semiconductor switch. For example, when the maximum current value that the selected semiconductor switch can interrupt is 10A, at this time, the second preset derating factor can be set to 0.9 to maximize the performance of the semiconductor switch. Of course, the above example is only for illustration and does not limit the specific selection of the semiconductor switch and the determination of the second preset derating factor.

[0088] In an exemplary embodiment, performing a protection action includes at least one of the following steps:

[0089] Cut off the power supply to the brake coil.

[0090] By cutting off the power supply to the brake coil, the entire brake power supply control system can be de-energized. As Figure 1 shown, the electrical connection on the first side of the power module can be cut off. If there is one or more switches inside the power module, these switches can also be turned off to cut off the electrical connection of the power module, thereby de-energizing the brake coil.

[0091] Turn off the semiconductor switch.

[0092] By cutting off the semiconductor switch, the brake coil is de-energized. As Figure 1 shown, the switch module 104 includes at least one semiconductor switch. In the case of using two semiconductor switches, at least one semiconductor switch can be cut off to disconnect the electrical connection between the power module and the brake coil, thereby de-energizing the brake coil.

[0093] In an exemplary embodiment, the above brake power supply control system can be carried on an elevator system to control and maintain the stopped state or running state of the elevator.

[0094] In the elevator system, the brake power supply control system can also be installed on the drive motor in the elevator system. When the elevator needs to stop or brake, the brake power supply control system is activated and controls and maintains the stopped state or running state of the elevator to prevent the elevator from continuing to move or fall in the case of stopping or power failure, ensuring the safety of passengers and equipment.

[0095] As Figure 1 shown, during the operation of the elevator, all semiconductor switches remain in the on state; during the stop of the elevator, at least one semiconductor switch remains in the off state. By switching the state of the semiconductor switch, it is ensured that the elevator system can maintain normal operation.

[0096] 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 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 in turn with at least a part of other steps or steps or stages in other steps.

[0097] Based on the same inventive concept, an embodiment of the present application further provides a brake power supply control system detection device for implementing the above-mentioned brake power supply control system detection method. 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 following brake power supply control system detection device can refer to the limitations on the brake power supply control system detection method in the above text, and will not be repeated here.

[0098] In an exemplary embodiment, as Figure 3 shown, a brake power supply control system detection device 300 is provided, including: a periodic detection trigger module 302, a parameter acquisition module 304, and a protection module 306, where:

[0099] The periodic detection trigger module 302 is used to periodically switch the on-off state of the semiconductor switch on the power supply loop during the power supply process to the brake coil, so as to periodically disconnect the power supply to the brake coil.

[0100] The parameter acquisition module 304 acquires the actual voltage and actual current of the freewheeling module when the power supply is disconnected.

[0101] The protection module 306 performs a protection action if it is determined according to the actual voltage and actual current that the semiconductor switch does not work within the specified range, or the resistance value of the freewheeling module is abnormal.

[0102] Each module in the above brake power supply control system detection device can be implemented in whole or in part by software, hardware, and their combination. The above modules can be embedded in the processor in the computer device in hardware form or independent of it, or stored in the memory in the computer device in software form, so that the processor can call and execute the operations corresponding to the above modules.

[0103] In an exemplary embodiment, a brake coil power supply control circuit is provided, as Figure 1As shown, it includes a power supply module 112, a switching module 104, a freewheeling module 110, a voltage detection device 106, a current detection device 108, and a controller 114.

[0104] Among them: The output terminal of the power supply module 112 is used to connect to the brake coil 102 to provide the operating voltage for the brake coil 102.

[0105] The power supply module 112 is used to convert the alternating current signal into a direct current signal to provide the operating voltage for the brake coil 102. The function of the power supply module 112 can be realized by devices such as a rectifier, a switching power supply, a charge pump, etc. The specific selection of the power supply module 112 needs to be determined according to the actual application scenario and performance requirements to obtain a direct current signal suitable for the brake coil 102.

[0106] The switching module 104 is arranged on the power supply loop of the power supply module 112 and the brake coil 102.

[0107] The switching module 104 is used to control the on-off of the power supply loop of the power supply module 112 and the brake coil 102. As Figure 1 shown, the switching module 104 of the brake coil 102 power supply control circuit includes at least one semiconductor switch. In the case of using two semiconductor switches, it is possible to avoid the misoperation of the controller 114 controlling the switching module 104 to improve the reliability of the brake coil 102 power supply control circuit.

[0108] The two connection ends of the freewheeling module 110 are respectively connected corresponding to the two power supply ends of the brake coil 102.

[0109] The freewheeling module 110 may include a fast discharge freewheeling diode 1102 and a freewheeling resistor 1104.

[0110] Among them, the fast discharge freewheeling diode 1102 is a special diode that can quickly recover and transfer current in a switching circuit or a power supply circuit. The fast discharge freewheeling diode 1102 usually adopts special materials and structural designs and can quickly recover from the conducting state to the cut-off state to achieve fast reverse recovery, so as to improve efficiency, reduce energy loss, and reduce the circuit response time.

[0111] The freewheeling resistor 1104 is a resistor used to provide a freewheeling path. It can provide freewheeling protection and suppress voltage peaks to ensure the normal operation of the circuit. The freewheeling resistor 1104 provides a path with a relatively low resistance value, enabling the current to continue flowing and avoiding sudden interruption of the current. It can absorb and dissipate current peaks, slow down the rate of current change, dampen oscillations, and protect the switching elements from excessive voltage shocks. The selection of the freewheeling resistor 1104 needs to consider the characteristics and requirements of the circuit. An overly high resistance value may result in ineffective suppression of voltage spikes, while an overly low resistance value may cause the brake release speed to be too slow, posing a danger. Therefore, the selection of the freewheeling resistor 1104 needs to comprehensively consider systematic overall requirements such as the brake response time and the maximum voltage and current that the switching module can withstand to achieve effective freewheeling protection effect.

[0112] Through the combined action of the fast discharge freewheeling diode 1102 and the freewheeling resistor 1104, the freewheeling module 110 can provide a freewheeling path when the brake loses power. While making the back electromotive force generated by the brake coil low enough, it ensures that the release speed of the brake meets the system requirements, prevents accidental movement or falling of the elevator or other equipment, maintains the working state of the brake, and ensures safety.

[0113] The two connection terminals of the voltage detection device 106 are respectively connected corresponding to the two connection terminals of the freewheeling module 110 for obtaining the actual voltage of the freewheeling module 110.

[0114] The current detection device 108 is arranged on the loop formed by the freewheeling module 110 and the brake coil 102 for obtaining the actual current of the freewheeling module 110.

[0115] The actual voltage of the freewheeling module 110 can be periodically obtained through the voltage detection device 106, and the actual current of the freewheeling module 110 can be obtained through the current detection device 108. According to the actual voltage and actual current, it can be judged whether the semiconductor switch is operating within the specification range or whether the resistance value of the freewheeling module 110 is abnormal, so as to periodically detect whether the power supply control circuit of the brake coil 102 is in a normal working state and improve the reliability of the power supply control circuit of the brake coil 102.

[0116] The controller 114 is respectively connected to the voltage detection device 106, the current detection device 108, the switching module 104, and the power supply module 112. The controller 114 is used to execute the steps of any one of the above-mentioned brake power supply control system detection methods.

[0117] In an exemplary embodiment, the switching module 104 includes a first semiconductor switch 1042 and / or a second semiconductor switch 1044.

[0118] Among them, the input end of the first semiconductor switch 1042 is connected to the positive output end of the power supply module 112, and the output end of the first semiconductor switch 1042 is used to connect to the positive input end of the brake coil 102; alternatively, the input end of the first semiconductor switch 1042 is used to connect to the negative input end of the brake coil 102, and the output end of the first semiconductor switch 1042 is connected to the negative output end of the power supply module 112.

[0119] The input end of the second semiconductor switch 1044 is connected to the positive output end of the power supply module 112, and the output end of the second semiconductor switch 1044 is used to connect to the positive input end of the brake coil 102; alternatively, the input end of the second semiconductor switch 1044 is used to connect to the negative input end of the brake coil 102, and the output end of the second semiconductor switch 1044 is connected to the negative output end of the power supply module 112.

[0120] When the first semiconductor switch 1042 and the second semiconductor switch 1044 coexist, at least one semiconductor switch can be cut off to disconnect the electrical connection between the power supply module 112 and the brake coil 102, thereby de-energizing the brake coil 102.

[0121] In an exemplary embodiment, the power supply module 112 includes:

[0122] A first rectifier bridge 1121 and a third semiconductor switch 1122. The first side of the first rectifier bridge 1121 is used to connect to an AC power supply, the second side of the first rectifier bridge 1121 is connected to the switch module 104, and the third semiconductor switch 1122 is disposed on the power supply loop between the second side of the first rectifier bridge 1121 and the switch module 104. The third semiconductor switch 1122 is used to switch between a conducting state and a non-conducting state to adjust the current input to the brake coil 102 to the command current of the brake coil 102.

[0123] As Figure 4 shown, the first rectifier bridge 1121 can convert an AC signal into a DC signal. By controlling the duty cycle of the third semiconductor switch 1122 element, the current flowing into the brake coil 102 can be controlled. According to the output signal of the current detection device 108, the current of the brake coil 102 can also be intuitively obtained to achieve closed-loop control.

[0124] When the power supply module 112 includes a first rectifier bridge 1121 and a third semiconductor switch 1122, the power supply module 112 may further include a slow discharge freewheeling diode 1123. The slow discharge freewheeling diode 1123 can achieve freewheeling protection and switch tube protection in the circuit, improving the stability of the circuit. In practical applications, when the power switch is turned off, the magnitude of the back electromotive force generated by the brake coil 102 depends on the impedance of the freewheeling circuit, and the slow discharge freewheeling diode 1123 can provide a low impedance path for the brake coil 102, thereby protecting the third semiconductor switch 1122 from high voltage breakdown.

[0125] The power-off of the brake coil 102 can be achieved by turning off the third semiconductor switch 1122 and / or the switch module 104. In the case of the power-off of the brake coil 102, the slow discharge freewheeling diode 1123 is used to provide freewheeling for the brake.

[0126] Of course, in order to prevent mis-triggering of the third semiconductor switch 1122, other semiconductor switches, or relays, or a reverse series semiconductor switch combination as shown in Figure 5 may be provided on the first side of the first rectifier bridge 1121 to improve the reliability of the power supply control circuit of the brake coil 102.

[0127] Or,

[0128] a second rectifier bridge 1124, a fourth semiconductor switch 1125, and a transformer 1126. The first side of the second rectifier bridge 1124 is used to connect to an AC power supply. The second side of the second rectifier bridge 1124 is connected to the primary side of the transformer 1126. The secondary side of the transformer 1126 is connected to the switch module 104. The fourth semiconductor switch 1125 is provided on the power supply circuit between the second side of the second rectifier bridge 1124 and the secondary side of the transformer 1126; the fourth semiconductor switch 1125 is used to switch between the on and off states to adjust the voltage input to the brake coil 102 to the operating voltage of the brake.

[0129] As shown in Figure 6 similar to the first rectifier bridge 1121, the second rectifier bridge 1124 can convert an AC signal into a DC signal. By controlling the duty cycle of the fourth semiconductor switch 1125 element, the output voltage of the secondary winding of the transformer 1126 can be controlled, and thus the voltage across the brake coil 102 can be controlled.

[0130] When the power supply module 112 includes a second rectifier bridge 1124, a fourth semiconductor switch 1125, and a transformer 1126, the power supply module 112 may further include a first capacitor 1127, a diode 1128, an inductor 1129, and a second capacitor 1130. Among them, the first capacitor 1127 can make the output electrical signal of the second rectifier bridge 1124 more stable, and the diode 1128, the inductor 1129, and the second capacitor 1130 can make the output electrical signal on the second side of the transformer 1126 more stable, so as to improve the stability of the power supply control circuit of the brake coil 102.

[0131] If it is necessary to cut off the power supply of the brake coil 102, the fourth semiconductor switch 1125 can be made to stop the chopping operation, or the switch module 104 can be turned off, so as to cut off the power supply of the entire brake power supply control system.

[0132] Of course, a buck circuit or a boost circuit can also be provided on the second side of the second rectifier bridge 1124 for voltage adjustment, so as to adjust the voltage to a voltage range suitable for the brake coil 102.

[0133] In an exemplary embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as Figure 7 shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, abbreviated as I / O), and a communication interface. Among them, the processor, the memory, and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. 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 data such as nominal resistance values and preset resistance value ranges. The input / output interface of the computer device is used to exchange information between the processor and external devices. The communication interface of the computer device is used to communicate with external terminals through a network connection. When the computer program is executed by the processor, it implements a method for detecting a brake power supply control system.

[0134] Those skilled in the art can understand that Figure 7 the structure shown in

[0135] In an exemplary embodiment, a computer device is provided, which includes a memory and a processor. A computer program is stored in the memory, and when the processor executes the computer program, the steps of any of the above-described brake power supply control system detection methods are implemented.

[0136] In an embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of any of the above-described brake power supply control system detection methods are implemented.

[0137] In an embodiment, a computer program product is provided, which includes a computer program. When the computer program is executed by a processor, the steps of any of the above-described brake power supply control system detection methods are implemented.

[0138] Those of ordinary skill in the art can understand that all or part of the processes of implementing the methods in 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 the present 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 the present 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 the present 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.

[0139] 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 that the scope described in this specification is covered.

[0140] 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 patent of the present application. 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 present application should be subject to the appended claims.

Claims

1. A method for detecting a brake power supply control system, characterized in that, Including: During the power supply to the brake coil, periodically switch the on / off state of the semiconductor switch on the power supply circuit to periodically cut off the power supply to the brake coil; Obtain the actual voltage and actual current of the freewheeling module when the power supply is cut off; If it is determined according to the actual voltage and the actual current that the semiconductor switch does not work within the specification range, or the resistance value of the freewheeling module is abnormal, then perform a protection action.

2. The method according to claim 1, characterized in that, The step of determining that the resistance value of the freewheeling module is abnormal according to the actual voltage and the actual current includes: If the ratio of the actual voltage to the nominal resistance value exceeds the preset current range, then it is determined that the current detection circuit is abnormal.

3. The method according to claim 1, characterized in that, The step of determining that the resistance value of the freewheeling module is abnormal according to the actual voltage and the actual current includes: If the product of the actual current and the nominal resistance value exceeds the preset voltage range, then it is determined that the voltage detection circuit is abnormal.

4. The method according to claim 1, characterized in that, The step of determining that the resistance value of the freewheeling module is abnormal according to the actual voltage and the actual current includes: If the ratio of the actual voltage and the actual current exceeds the preset resistance range, then it is determined that the resistance value of the freewheeling module is abnormal, where the lower limit value of the preset resistance range is the minimum resistance value that meets the braking speed requirement of the brake coil, and the upper limit value of the preset resistance range is the maximum resistance value allowed under normal power supply.

5. The method according to claim 1, characterized in that, The step of determining that the semiconductor switch does not work within the specification range according to the actual voltage and the actual current includes: If the actual voltage is greater than or equal to the preset voltage, then it is determined that the semiconductor switch does not work within the target voltage range, and the preset voltage is the product of the maximum voltage value that the semiconductor switch can withstand and the first preset derating factor.

6. The method according to claim 1, characterized in that, The step of determining that the semiconductor switch does not work within the specification range according to the actual voltage and the actual current includes: If the actual current is greater than or equal to the preset current, then it is determined that the semiconductor switch does not work within the target current range, and the preset current is the product of the maximum current value that the semiconductor switch can withstand and the second preset derating factor.

7. The method according to claim 1, characterized in that, The execution of the protection action includes at least one of the following steps: Cut off the power supply of the brake coil; Turn off the semiconductor switch.

8. A device for detecting a brake power supply control system, characterized in that, Including: A periodic detection trigger module, which is used to periodically switch the on / off state of the semiconductor switch on the power supply circuit during the power supply to the brake coil to periodically cut off the power supply to the brake coil; A parameter acquisition module, which acquires the actual voltage and actual current of the freewheeling module when the power supply is cut off; A protection module, which performs a protection action if it is determined according to the actual voltage and the actual current that the semiconductor switch does not work within the specification range, or the resistance value of the freewheeling module is abnormal.

9. A brake coil power supply control circuit, characterized in that, Including: A power supply module, the output end of which is used to connect to the brake coil to provide the working voltage for the brake coil; A switch module, which is arranged on the power supply circuit between the power supply module and the brake coil; A freewheeling module, the two connection ends of which are respectively connected corresponding to the two power supply ends of the brake coil; A voltage detection device, the two connection terminals of the voltage detection device are respectively and correspondingly connected to the two connection terminals of the freewheeling module, and are used to obtain the actual voltage of the freewheeling module; A current detection device, the current detection device is arranged on the loop formed by the freewheeling module and the brake coil, and is used to obtain the actual current of the freewheeling module; A controller, the controller is respectively connected to the voltage detection device, the current detection device, the switch module, and the power supply module, and the controller is used to execute the steps of any one of the methods in the above-mentioned claims 1-6.

10. The circuit according to claim 9, characterized in that, The switch module includes: A first semiconductor switch, the input terminal of the first semiconductor switch is connected to the positive output terminal of the power supply module, and the output terminal of the first semiconductor switch is used to connect to the positive input terminal of the brake coil; or, the input terminal of the first semiconductor switch is used to connect to the negative input terminal of the brake coil, and the output terminal of the first semiconductor switch is connected to the negative output terminal of the power supply module; And / or, A second semiconductor switch, the input terminal of the second semiconductor switch is connected to the positive output terminal of the power supply module, and the output terminal of the second semiconductor switch is used to connect to the positive input terminal of the brake coil; or, the input terminal of the second semiconductor switch is used to connect to the negative input terminal of the brake coil, and the output terminal of the second semiconductor switch is connected to the negative output terminal of the power supply module.

11. The circuit according to claim 9, wherein, The power supply module includes: A first rectifier bridge and a third semiconductor switch, the first side of the first rectifier bridge is used to connect to an AC power supply, the second side of the first rectifier bridge is connected to the switch module, the third semiconductor switch is arranged on the power supply loop between the second side of the first rectifier bridge and the switch module, and the third semiconductor switch is used to switch between the on state and the off state to adjust the current input to the brake coil to the rated current of the brake coil; Or, A second rectifier bridge, a fourth semiconductor switch and a transformer, the first side of the second rectifier bridge is used to connect to an AC power supply, the second side of the second rectifier bridge is connected to the primary side of the transformer, the secondary side of the transformer is connected to the switch module, and the fourth semiconductor switch is arranged on the power supply loop between the second side of the second rectifier bridge and the secondary side of the transformer; the fourth semiconductor switch is used to switch between the on state and the off state to adjust the voltage input to the brake coil to the operating voltage of the brake.

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