Method for detecting the star connection of an elevator drive and related device

Abstract

The application provides a detection method of an elevator drive device star seal device and a related device. The detection method of the star seal device comprises the following steps: in the case that the elevator is static, controlling a running contactor and the star seal device to be closed; or in the case that the elevator is static, controlling the running contactor to be opened and the star seal device to be closed; determining that at least two-phase switch tubes located in different bridge arms of a driver are a test switch tube combination; inputting a pulse voltage to the test switch tube combination according to a preset pulse strategy; and determining a detection result of the star seal device according to an output current value or an output voltage value of at least one phase of a phase where the test switch tube combination is located when the pulse voltage is input. The application can complete the detection of the star seal device when the elevator is in a static state. Compared with the existing brake release and coasting detection method, the embodiment of the application has high safety and improves the detection efficiency.

Description

Technical Field

[0001] This invention relates to the field of elevator control technology, and in particular to a method and related apparatus for detecting a sealing device of an elevator drive unit. Background Technology

[0002] Elevator standards require that, in addition to the standard brake, elevators must be equipped with additional safety braking devices to address risks such as overspeed, suspension failure, and unexpected movement. These additional safety braking devices typically employ a star-shaped locking mechanism, and the status of this mechanism (usually a contactor or relay) must be monitored and assessed.

[0003] The existing method for detecting and judging the status of the satellite sealing device is to run the satellite under sealing conditions. This mainly involves releasing the brakes and running the satellite under sealing conditions, and judging whether the satellite sealing device is in good condition by the speed of the run-off.

[0004] Under the existing detection method of sealing the star and causing the elevator to slip, the "unexpected movement" caused by the slip poses a safety risk, resulting in poor safety and is likely to cause panic among the people in the car. In addition, the process of releasing the brake and causing the elevator to slip requires a series of operations such as sealing the star, releasing the brake, failure judgment, and re-leveling, which is time-consuming and has low detection efficiency. Summary of the Invention

[0005] This invention provides a method and related apparatus for detecting the sealing device of an elevator drive unit, in order to solve the problems of poor safety and low detection efficiency of existing sealing device slippage detection methods.

[0006] To solve the above-mentioned technical problems, the present invention is implemented as follows:

[0007] In a first aspect, embodiments of the present invention provide a method for detecting a sealing device of an elevator drive unit. The elevator drive unit includes: a driver, a running contactor, a sealing device, and a motor. The three-phase output terminal of the driver is connected to the three-phase terminal of the motor through the running contactor. The method for detecting the sealing device includes:

[0008] When the elevator is stationary, control the operation contactor and the sealing device to close; or, when the elevator is stationary, control the operation contactor to open and control the sealing device to close.

[0009] The switching transistors located in different bridge arms of at least two phases on the driver are identified as test switching transistor combinations. According to a preset pulse strategy, pulse voltages are successively input to the test switching transistor combinations. Furthermore, the detection result of the star-sealing device is determined based on the output current value or output voltage value of at least one phase of the phase in which the test switching transistor combination is located when the pulse voltage is input.

[0010] Optionally, the pulse strategy includes inputting an adjustable pulse voltage to at least one of the test switches in the test switch combination, wherein the pulse width of the adjustable pulse voltage increases sequentially from a base pulse width to a termination pulse width.

[0011] When the operating contactor and the star-sealing device are closed, the detection result of the star-sealing device is determined based on the output current or output voltage value of at least one phase of the phase in which the test switch assembly is located when the pulse voltage is input, including:

[0012] During the process of the adjustable pulse voltage pulse width gradually increasing from the base pulse width to the termination pulse width, if there is at least one instance where the output current value is greater than or equal to a preset current threshold, the detection result is determined to be that the sealing device is normal.

[0013] During the process of gradually increasing the pulse width of the adjustable pulse voltage from the base pulse width to the termination pulse width, if the output current value is less than the current threshold each time, the detection result is determined to be an abnormality of the sealing device.

[0014] Optionally, the pulse strategy includes inputting an adjustable pulse voltage to at least one of the test switches in the test switch combination, wherein the pulse width of the adjustable pulse voltage increases sequentially from a base pulse width to a termination pulse width.

[0015] When the operating contactor is opened and the star-sealing device is closed, the detection result of the star-sealing device is determined based on the output current or output voltage value of at least one phase of the phase in which the test switch assembly is located when the pulse voltage is input, including:

[0016] During the process of the adjustable pulse voltage pulse width gradually increasing from the base pulse width to the termination pulse width, if there is at least one instance where the output current value is greater than or equal to a preset current threshold, the detection result is determined to be that the sealing device is close to the driver side.

[0017] During the process of the adjustable pulse voltage pulse width gradually increasing from the base pulse width to the termination pulse width, if the output current value is less than the current threshold each time, the detection result is determined to be that the sealing device is close to the motor side.

[0018] Optionally, the pulse strategy includes inputting an adjustable pulse voltage to all test switches in the test switch assembly;

[0019] During the process of gradually increasing the pulse width of the adjustable pulse voltage from the base pulse width to the termination pulse width, the pulse width of the adjustable pulse voltage input to each test switch is equal each time.

[0020] Optionally, the pulse strategy further includes inputting a first pulse voltage to other test switches in the test switch assembly that have not been inputted with the adjustable pulse voltage;

[0021] The pulse width of the first pulse voltage is a fixed value, and the pulse width of any of the adjustable pulse voltages is not equal to the pulse width of the first pulse voltage.

[0022] Optionally, the pulse width of the adjustable pulse voltage increases sequentially from the base pulse width to the termination pulse width according to a preset increment step size.

[0023] Optionally, the driver includes a current detection module;

[0024] The detection result of the star-sealing device is determined based on the output current or output voltage value of at least one phase of the phase in which the test switch assembly is located when the pulse voltage is input, including the following:

[0025] The output current value is measured using the current detection module.

[0026] Optionally, the pulse strategy includes inputting an adjustable pulse voltage to at least one of the test switches in the test switch combination, wherein the pulse width of the adjustable pulse voltage increases sequentially from a base pulse width to a termination pulse width.

[0027] When the operating contactor and the star-sealing device are closed, the detection result of the star-sealing device is determined based on the output current or output voltage value of at least one phase of the phase in which the test switch assembly is located when the pulse voltage is input, including:

[0028] During the process of the adjustable pulse voltage pulse width gradually increasing from the base pulse width to the termination pulse width, if there is at least one instance where the output voltage changes from the positive voltage of the bus to the negative voltage of the bus, the detection result is determined to be that the sealing device is normal.

[0029] If, during the process of gradually increasing the pulse width of the adjustable pulse voltage from the base pulse width to the termination pulse width, the output voltage fails to change from the positive voltage of the bus to the negative voltage of the bus each time, the detection result is determined to be an abnormality of the sealing device.

[0030] Optionally, the pulse strategy includes inputting an adjustable pulse voltage to at least one of the test switches in the test switch combination, wherein the pulse width of the adjustable pulse voltage increases sequentially from a base pulse width to a termination pulse width.

[0031] When the operating contactor is opened and the star-sealing device is closed, the detection result of the star-sealing device is determined based on the output current or output voltage value of at least one phase of the phase in which the test switch assembly is located when the pulse voltage is input, including:

[0032] During the process of the adjustable pulse voltage pulse width gradually increasing from the base pulse width to the termination pulse width, if there is at least one instance where the output voltage changes from the positive voltage of the bus to the negative voltage of the bus, the detection result is determined to be that the sealing device is close to the driver side.

[0033] During the process of the adjustable pulse voltage pulse width gradually increasing from the base pulse width to the termination pulse width, if the output voltage does not change from the positive voltage of the bus to the negative voltage of the bus each time, it is determined that the detection result is that the sealing device is close to the motor side.

[0034] Secondly, embodiments of the present invention provide a detection device for a sealing device of an elevator drive system. The elevator drive system includes: a driver, a running contactor, a sealing device, and a motor. The three-phase output terminal of the driver is connected to the three-phase terminal of the motor through the running contactor. The detection device for the sealing device includes:

[0035] The control module is used to control the operation contactor and the sealing star device to close when the elevator is stationary; or, when the elevator is stationary, to control the operation contactor to open and the sealing star device to close.

[0036] The execution module is used to determine that at least two phases of the driver located in different bridge arms are test switch combinations, and to input pulse voltages to the test switch combinations one by one according to a preset pulse strategy. Furthermore, based on the output current value or output voltage value of at least one phase of the phase in which the test switch combination is located when the pulse voltage is input, the detection result of the star-sealing device is determined.

[0037] Thirdly, embodiments of the present invention provide an electronic device, including a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps in the detection method of the sealing device of the elevator drive device as described in any one of the first aspects.

[0038] Fourthly, embodiments of the present invention provide a readable storage medium storing a program or instructions that, when executed by a processor, implement the steps in the detection method of the sealing device of the elevator drive device as described in any one of the first aspects.

[0039] Fifthly, embodiments of the present invention provide a computer program product, including computer instructions, which, when executed by a processor, implement the steps of the detection method for the sealing device of the elevator drive device as described in any one of the first aspects.

[0040] In this embodiment of the invention, the detection method for the sealing device includes: controlling the operation contactor and the sealing device to close when the elevator is stationary; or, controlling the operation contactor to open and the sealing device to close when the elevator is stationary; determining that at least two phases of the driver located in opposite bridge arms are a test switch combination; sequentially inputting pulse voltages to the test switch combination according to a preset pulse strategy; and determining the detection result of the sealing device based on the output current value or output voltage value of at least one phase of the phase in which the test switch combination is located when the pulse voltage is input. This invention can complete the detection of the sealing device when the elevator is in a static state. Compared with existing detection methods that rely on brake release and slippage, this embodiment of the invention offers higher safety and improved detection efficiency. Attached Figure Description

[0041] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0042] Figure 1 This is a schematic diagram of the elevator drive system.

[0043] Figure 2 This is a schematic flowchart of the detection method of the sealing device according to an embodiment of the present invention;

[0044] Figure 3 This is a schematic diagram of the pulse strategy;

[0045] Figure 4 This is one of the schematic diagrams of a conduction circuit;

[0046] Figure 5 This is the second schematic diagram of the conduction circuit;

[0047] Figure 6 This is a flowchart illustrating the testing procedure;

[0048] Figure 7 This is a schematic block diagram of the detection device of the sealing device according to an embodiment of the present invention;

[0049] Figure 8 This is a schematic block diagram of an electronic device according to an embodiment of the present invention. Detailed Implementation

[0050] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] The terms "first," "second," etc., used in this embodiment of the invention are used to distinguish similar objects, not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of the invention can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, without limiting the number of objects; for example, the first object can be one or more. Furthermore, in this embodiment of the invention, "or" indicates at least one of the connected objects. For example, "A or B" covers three scenarios: Scenario 1: includes A but does not include B; Scenario 2: includes B but does not include A; Scenario 3: includes both A and B. The character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0052] In the technical solutions of the embodiments of the present invention, terms such as "connection", "coupling" or "connected" are not limited to physical or mechanical connections, but may include electrical connections.

[0053] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0054] This invention provides a method for detecting the sealing device of an elevator drive unit. See [link to relevant documentation]. Figure 1 As shown, Figure 1 This is a schematic diagram of an elevator drive system. The elevator drive system includes: a driver 100, a running contactor 200, a sealing device 300, and a motor 400. The three-phase output terminals of the driver 100 are connected to the three-phase terminals of the motor 400 through the running contactor 200. (See attached diagram.) Figure 2 As shown, Figure 2 This is a schematic flowchart of the detection method for the sealing device according to an embodiment of the present invention. The detection method for the sealing device includes:

[0055] Step 11: With the elevator stationary, control the operation contactor and the sealing star device to close; or, with the elevator stationary, control the operation contactor to open and control the sealing star device to close.

[0056] Step 12: Determine at least two phases of the switch transistors located in different bridge arms on the driver as the test switch transistor combination. According to the preset pulse strategy, input pulse voltage to the test switch transistor combination one by one. And, based on the output current value or output voltage value of at least one phase of the phase where the test switch transistor combination is located when the pulse voltage is input, determine the detection result of the star sealing device.

[0057] In this embodiment of the invention, when the elevator is stationary, step 11 controls the operation contactor and the sealing star device to close, or controls the operation contactor to open and the sealing star device to close. For the operation contactor to close, the reliability of the operation can be determined by a feedback contact. It should also be noted that there are no timing requirements for the closing actions of the operation contactor and the sealing star device.

[0058] It should be noted that at least two phases of the switching transistors located in different bridge arms on the driver are test switching transistor combinations. See some optional embodiments for details. Figure 1 As shown, the test switch combination may include switch S1 and switch S4. Switch S1 is located in phase U, and switch S4 is located in phase V. Furthermore, switch S1 is located in the upper bridge arm of phase U, and switch S4 is located in the lower bridge arm of phase V. The two are switches located in opposite bridge arms of two phases on the driver.

[0059] In some optional embodiments, see Figure 1 As shown, the test switch assembly may include switch S1, switch S4, and switch S5. Switch S1 is located in phase U, switch S4 is located in phase V, and switch S5 is located in phase W. Furthermore, switch S1 is located on the upper bridge arm of phase U, switch S4 is located on the lower bridge arm of phase V, and switch S5 is located on the upper bridge arm of phase W. The three switches (diagonally) alternately occupy the upper and lower bridge arms, constituting a test switch assembly. In some alternative embodiments, the test switch assembly may also include switch S1, switch S4, and switch S6, each located in one of the three phases, constituting a test switch assembly.

[0060] It should be noted that the energy of the pulse voltage can reach the conduction threshold of any one of the test switches in the test switch combination. In other words, when the pulse voltage is applied, the test switch switches between on and off according to the period of the pulse voltage.

[0061] In this embodiment of the invention, when the control contactor and the star-sealing device are closed, pulse voltages (i.e., short-circuit pulses) are sequentially input to the test switch combination according to a preset pulse strategy. Furthermore, the detection result of the star-sealing device is determined based on the output current value of at least one phase of the phase containing the test switch combination when the pulse voltage is input. For example, see... Figure 1As shown, the test switch combination can include switch S1 and switch S4. Short-circuit pulses are sent to switch S1 and switch S4 according to a preset pulse strategy. The output current values ​​of the U phase of switch S1 and the V phase of switch S4 under the short-circuit pulse are used to determine whether the star-sealing device is malfunctioning. In practical applications, when switch S1 and switch S4 are turned on, the detection result of the star-sealing device is determined based on the output current value of either the U phase of switch S1 or the V phase of switch S4. When switch S2 and switch S3 are turned on, the detection result of the star-sealing device is determined based on the output current value of either the U phase of switch S2 or the V phase of switch S3.

[0062] In this embodiment of the invention, when the operating contactor is controlled to open and the star-sealing device is controlled to close, pulse voltages (i.e., short-circuit pulses) are sequentially input to the test switch combination according to a preset pulse strategy. Furthermore, the detection result of the star-sealing device is determined based on the output current value of at least one phase of the phase containing the test switch combination when the pulse voltage is input. For example, see [link to example]. Figure 1 As shown, the test switch combination may include switch S1 and switch S4. Short-circuit pulses are sent to switch S1 and switch S4 according to a preset pulse strategy. The location of the star-sealing device is determined based on the output current values ​​of the U phase of switch S1 and the V phase of switch S4 under the short-circuit pulse. In practical applications, switch S1 and switch S4 are turned on, and the detection result of the star-sealing device is determined based on the output current value of either the U phase of switch S1 or the V phase of switch S4; switch S2 and switch S3 are turned on, and the detection result of the star-sealing device is determined based on the output current value of either the U phase of switch S2 or the V phase of switch S3.

[0063] In some embodiments, the preset pulse strategy can be specifically determined by the user according to their actual needs and / or the user's ability to detect the output current of each phase, and the present invention does not limit this.

[0064] In some embodiments, the test switch combination includes switches S1, S4, and S6. A pulse voltage is input to switches S1, S4, and S6, and the output current of two phases of the switches is detected each time. For example, the first detection of the output currents of switches S1 and S4, i.e., the output currents of phase U and phase V, can determine whether K2-1 in the star-sealing device is abnormal. The second detection of the output currents of switches S4 and S6, i.e., the output currents of phase V and phase W, can determine whether K2-2 in the star-sealing device is abnormal.

[0065] In some embodiments, an abnormality is determined based on the output voltage. With the control contactor and the star-sealing device closed, pulse voltages (i.e., short-circuit pulses) are sequentially input to the test switch assembly according to a preset pulse strategy. The detection result of the star-sealing device is determined based on the output voltage value of at least one phase of the phase containing the test switch assembly when the input pulse voltage is applied. For example, see [link to example]. Figure 1 As shown, the test switch combination can include switch S1 and switch S4. Short-circuit pulses are sent to switch S1 and switch S4 according to a preset pulse strategy. The output voltage at the midpoint of the bridge arm of the phase where switch S1 is located under the short-circuit pulse is used to determine whether the star-sealing device is abnormal.

[0066] In some embodiments, when the operating contactor is controlled to open and the star-sealing device is controlled to close, pulse voltages (i.e., short-circuit pulses) are sequentially input to the test switch assembly according to a preset pulse strategy. Furthermore, the detection result of the star-sealing device is determined based on the output voltage of at least one phase of the phase containing the test switch assembly when the input pulse voltage is applied. For example, see [link to example]. Figure 1 As shown, the test switch combination may include switch S1 and switch S4. Short-circuit pulses are sent to switch S1 and switch S4 according to a preset pulse strategy. The position of the star-sealing device is determined based on the output voltage of the bridge arm midpoint of the phase in which switch S1 is located under the short-circuit pulse.

[0067] In this embodiment of the invention, the detection method for the sealing device includes: controlling the operation contactor and the sealing device to close when the elevator is stationary; or, controlling the operation contactor to open and the sealing device to close when the elevator is stationary; determining that at least two phases of the driver located in opposite bridge arms are a test switch combination; sequentially inputting pulse voltages to the test switch combination according to a preset pulse strategy; and determining the detection result of the sealing device based on the output current value or output voltage value of at least one phase of the phase in which the test switch combination is located when the pulse voltage is input. This invention can complete the detection of the sealing device when the elevator is in a static state. Compared with existing detection methods that rely on brake release and slippage, this embodiment of the invention offers higher safety and improved detection efficiency.

[0068] In some embodiments of the present invention, optionally, the pulse strategy includes inputting an adjustable pulse voltage to at least one of the test switches in the test switch combination, wherein the pulse width of the adjustable pulse voltage increases sequentially from the base pulse width to the termination pulse width.

[0069] With the control contactor and star-sealing device closed, the test results for the star-sealing device are determined based on the output current or output voltage value of at least one phase of the phase containing the test switch combination when the input pulse voltage is applied. These results include:

[0070] If, during the process of gradually increasing the pulse width of the adjustable pulse voltage from the base pulse width to the termination pulse width, there is at least one output current value that is greater than or equal to the preset current threshold, the detection result is determined to be that the sealing device is normal.

[0071] If the output current value is less than the current threshold each time the pulse width of the adjustable pulse voltage is gradually increased from the basic pulse width to the termination pulse width, the detection result is determined to be an abnormality of the star sealing device.

[0072] In this embodiment of the invention, the current threshold is determined by the specific hardware of the driver and represents the maximum current value that the driver can withstand.

[0073] In some embodiments, see Figure 1 As shown, the test switch combination may include switch S1 and switch S4. In this case, the pulse strategy can be found in [reference needed]. Figure 3 As shown, where, Figure 3 Figure (a) illustrates that adjustable pulse voltages are input to both switch S1 and switch S4. Figure 3 Figure (b) illustrates an adjustable pulse voltage input to switch S1 and a pulse voltage with a fixed pulse width input to switch S4.

[0074] In this embodiment of the invention, the pulse width of the adjustable pulse voltage increases gradually from the basic pulse width to the termination pulse width. In other words, the short-circuit pulse is accumulated to avoid false detections caused by an excessively small pulse width, and also to avoid the impact on power devices caused by an excessively large pulse width, thus balancing the high accuracy of the detection results with the safe operation of the elevator.

[0075] In this embodiment of the invention, if there is at least one output current value greater than or equal to a preset current threshold, the detection result is determined to be normal for the star-sealing device. This can be achieved by determining that the star-sealing device is normal when the first output current value is detected to be greater than or equal to the current threshold, and stopping subsequent detections; or by recording all output current data as the pulse width of the adjustable pulse voltage increases from the base pulse width to the termination pulse width, and determining whether there is at least one output current value greater than or equal to the preset current threshold based on all current data, thereby determining whether the star-sealing device is normal.

[0076] During the process of gradually increasing the pulse width of the adjustable pulse voltage from the basic pulse width to the terminal pulse width, if the output current value is less than the current threshold each time, it indicates that K2 of the corresponding phase in the star-sealing device is not closed (if the switch in the test switch combination belongs to the U and V phases, the corresponding switch is K2-1; if the switch in the test switch combination belongs to the V and W phases, the corresponding switch is K2-2), and the detection result is determined to be an abnormality of the star-sealing device.

[0077] In some embodiments of the present invention, optionally, the pulse strategy includes inputting an adjustable pulse voltage to at least one of the test switches in the test switch combination, wherein the pulse width of the adjustable pulse voltage increases sequentially from the base pulse width to the termination pulse width.

[0078] With the control contactor open and the control star-sealing device closed, the test results for the star-sealing device are determined based on the output current or output voltage value of at least one phase of the phase containing the test switch combination when the input pulse voltage is applied. These results include:

[0079] During the process of gradually increasing the pulse width of the adjustable pulse voltage from the basic pulse width to the termination pulse width, if there is at least one output current value that is greater than or equal to the preset current threshold, the detection result is determined to be that the sealing device is close to the driver side.

[0080] If the output current value is less than the current threshold each time during the process of gradually increasing the pulse width of the adjustable pulse voltage from the basic pulse width to the termination pulse width, the detection result is determined to be that the sealing device is close to the motor side.

[0081] In this embodiment of the invention, the current threshold is determined by the specific hardware of the driver and represents the maximum current value that the driver can withstand.

[0082] In some embodiments, see Figure 1 As shown, the test switch combination may include switch S1 and switch S4. In this case, the pulse strategy can be found in [reference needed]. Figure 3 As shown, where, Figure 3 Figure (a) illustrates that adjustable pulse voltages are input to both switch S1 and switch S4. Figure 3 Figure (b) illustrates an adjustable pulse voltage input to switch S1 and a pulse voltage with a fixed pulse width input to switch S4.

[0083] In this embodiment of the invention, the pulse width of the adjustable pulse voltage increases gradually from the basic pulse width to the termination pulse width. In other words, the short-circuit pulse is accumulated to avoid false detections caused by an excessively small pulse width, and also to avoid the impact on power devices caused by an excessively large pulse width, thus balancing the high accuracy of the detection results with the safe operation of the elevator.

[0084] In this embodiment of the invention, if at least one output current value is greater than or equal to a preset current threshold, the detection result is determined to be that the sealing device is close to the driver side. This can be achieved by determining that the sealing device is close to the driver side the first time an output current value greater than or equal to the current threshold is detected, and stopping subsequent detections; or by recording all output current data as the adjustable pulse voltage pulse width increases from the base pulse width to the termination pulse width, and determining whether at least one output current value is greater than or equal to the preset current threshold based on all current data, thereby determining whether the sealing device is close to the driver side or the motor side. If at least one output current value is greater than or equal to the preset current threshold, it indicates that the control operation controlling the sealing device to close has completed the loop, and the sealing device is determined to be close to the driver side. If at least one output current value is not greater than or equal to the preset current threshold, it indicates that the control operation controlling the sealing device to close has not completed the loop, and the sealing device is determined to be close to the motor side.

[0085] In some embodiments of the present invention, optionally,

[0086] The pulse strategy involves inputting adjustable pulse voltages to all test switches in the test switch combination;

[0087] During the process of gradually increasing the pulse width of the adjustable pulse voltage from the base pulse width to the terminal pulse width, the pulse width of the adjustable pulse voltage input to each test switch is equal each time.

[0088] In some embodiments, see Figure 1 As shown, the test switch combination may include switch S1 and switch S4. In this case, the pulse strategy can be found in [reference needed]. Figure 3 As shown, where, Figure 3 Figure (a) illustrates that adjustable pulse voltages are input to both switch S1 and switch S4, and the pulse widths of the adjustable pulse voltages input to switch S1 and switch S4 are equal each time.

[0089] See Figure 4 As shown, Figure 4 It indicates according to Figure 3 The schematic diagram of the conduction circuit of scheme (a) is shown when both switch S1 and switch S4 are input with adjustable pulse voltage (wave generation mode 1). The red dashed line indicates the conduction circuit when both switch S1 and switch S4 are turned on under the pulse voltage, and the blue dashed line indicates the conduction circuit when both switch S1 and switch S4 are turned off under the pulse voltage.

[0090] In this embodiment of the invention, the pulse strategy includes inputting an adjustable pulse voltage to all test switches in the test switch combination; as the pulse width of the adjustable pulse voltage gradually increases from the base pulse width to the terminal pulse width, the pulse width of the adjustable pulse voltage input to each test switch is equal each time, so that when the switches in the test switch combination are turned off simultaneously, the current will continue from the bus, the current will drop rapidly, and all the freewheeling current will flow through the diodes and will not flow through the power devices (e.g., insulated gate bipolar transistors, IGBTs) that input the pulse voltage to the test switch combination, thereby reducing the energy on the power devices and improving reliability.

[0091] In some embodiments of the present invention, optionally, the pulse strategy further includes inputting a first pulse voltage to other test switches in the test switch assembly that have not been inputted with an adjustable pulse voltage;

[0092] The pulse width of the first pulse voltage is a fixed value, and the pulse width of any adjustable pulse voltage is not equal to the pulse width of the first pulse voltage.

[0093] In some embodiments, see Figure 1 As shown, the test switch combination may include switch S1 and switch S4. In this case, the pulse strategy can be found in [reference needed]. Figure 3 As shown, where, Figure 3 Figure (b) illustrates that an adjustable pulse voltage is input to switch S1 and a pulse voltage with a fixed pulse width (i.e., the first pulse voltage in this embodiment) is input to switch S4. During the process of inputting pulse voltages to the test switch combination in sequence according to a preset pulse strategy, the pulse width of the adjustable pulse voltage input to switch S1 is always different from the pulse width of the first pulse voltage input to switch S4.

[0094] See Figure 5 As shown, Figure 5 It indicates according to Figure 3 The schematic diagram of the conduction circuit of the elevator drive device under the condition that the switch S1 is input with an adjustable pulse voltage and the switch S4 is input with a fixed pulse voltage (wave generation mode 2) is shown in the middle (b). The red dashed line indicates the conduction circuit when both switch S1 and switch S4 are turned on under the pulse voltage, and the blue dashed line indicates the conduction circuit when switch S1 is turned off and switch S4 is turned on under the pulse voltage.

[0095] In this embodiment of the invention, the pulse strategy further includes inputting a first pulse voltage to other test switches in the test switch combination that have not been inputted with an adjustable pulse voltage; the pulse width of the first pulse voltage is a fixed value, and the pulse width of any adjustable pulse voltage is not equal to the pulse width of the first pulse voltage, thereby improving the accuracy of the detection results.

[0096] In some embodiments of the present invention, optionally,

[0097] According to the preset increment step size, the pulse width of the adjustable pulse voltage increases gradually from the base pulse width to the termination pulse width.

[0098] Understandably, a smaller incremental compensation results in higher detection accuracy, but lower detection efficiency and requires more detection time. The incremental step size can be specifically set by the user according to the detection needs, and this invention does not limit it.

[0099] In this embodiment of the invention, the pulse width of the adjustable pulse voltage is gradually increased from the basic pulse width to the terminal pulse width according to a preset increment step size. This can avoid detection errors caused by inconsistent pulse width increases each time, and improve the accuracy of the detection results.

[0100] In some embodiments of the present invention, see optionally, see Figure 1 As shown, the driver 100 includes a current detection module 101;

[0101] The test results for the star-sealing device are determined based on the output current or output voltage value of at least one phase of the phase in which the test switch combination is located when the input pulse voltage is applied. This includes:

[0102] The output current value is measured using a current detection module 101.

[0103] In this embodiment of the invention, the output current value is measured by the current detection module 101 built into the driver 100, which avoids the cumbersome process of setting up an additional output current value measuring device, reduces the cost of implementing the detection device of this embodiment of the invention, and improves the convenience of large-scale application of this embodiment of the invention in the industry.

[0104] In some embodiments of the present invention, optionally, the pulse strategy includes inputting an adjustable pulse voltage to at least one of the test switches in the test switch combination, wherein the pulse width of the adjustable pulse voltage increases sequentially from the base pulse width to the termination pulse width.

[0105] When the operating contactor and the star-sealing device are closed, the detection result of the star-sealing device is determined based on the output current or output voltage value of at least one phase of the phase in which the test switch combination is located when the input pulse voltage is applied, including:

[0106] During the process of the adjustable pulse voltage pulse width gradually increasing from the base pulse width to the termination pulse width, if there is at least one instance where the output voltage changes from the positive voltage of the bus to the negative voltage of the bus, the detection result is determined to be that the sealing device is normal.

[0107] If, during the process of gradually increasing the pulse width of the adjustable pulse voltage from the base pulse width to the termination pulse width, the output voltage fails to change from the positive voltage of the bus to the negative voltage of the bus each time, the detection result is determined to be an abnormality of the sealing device.

[0108] See Figure 5 As shown, Figure 5 It indicates according to Figure 3 The diagram illustrates the conduction circuit of the elevator drive unit under scheme (b) where an adjustable pulse voltage is input to switch S1 and a fixed pulse voltage (wave generation method 2) is input to switch S4. The red dashed line indicates the conduction circuit when both switch S1 and switch S4 are on under the pulse voltage, and the blue dashed line indicates the conduction circuit when switch S1 is off and switch S4 is on under the pulse voltage. In this embodiment, the control contactor and the star-sealing device are closed, an adjustable pulse voltage is input to switch S1, and a fixed pulse voltage is input to switch S4. When both switch S1 and switch S4 are on under the pulse voltage, if K1 and K2 are both effective (i.e., the contactor 200 and the star-sealing device 300 are closed), the conduction circuit is as follows: Figure 5 As indicated by the red dashed arrow, the output voltage at the midpoint of the bridge arm where S1 is located is the positive voltage of the bus. Subsequently, switch S1 is turned off. If both K1 and K2 are effective (i.e., the running contactor 200 and the star-sealing device 300 are closed), the driver current freewheeling circuit is as follows: Figure 5 As indicated by the blue dashed arrow, current flows through the diode of S2, clamping the midpoint voltage of the bridge arm to the negative bus voltage. This means the output voltage at the midpoint of the bridge arm containing S1 changes from the positive bus voltage to the negative bus voltage. Therefore, if, during the process of gradually increasing the pulse width of the adjustable pulse voltage from the base pulse width to the final pulse width, the output voltage at the midpoint of the bridge arm containing S1 changes from the positive bus voltage to the negative bus voltage at least once, the detection result indicates the star-sealing device is functioning normally. If, after the switch S1 is turned off, the output voltage at the midpoint of the bridge arm containing S1 does not change from the positive bus voltage to the negative bus voltage, it indicates that a loop cannot be formed. In other words, during the process of gradually increasing the pulse width of the adjustable pulse voltage from the base pulse width to the final pulse width, the output voltage at the midpoint of the bridge arm containing S1 fails to change from the positive bus voltage to the negative bus voltage at all, indicating the star-sealing device is malfunctioning.

[0109] In some embodiments of the present invention, optionally, the pulse strategy includes inputting an adjustable pulse voltage to at least one of the test switches in the test switch assembly, wherein the pulse width of the adjustable pulse voltage increases sequentially from a base pulse width to a termination pulse width.

[0110] When the operating contactor is opened and the star-sealing device is closed, the detection result of the star-sealing device is determined based on the output current or output voltage value of at least one phase of the phase in which the test switch assembly is located when the pulse voltage is input, including:

[0111] During the process of the adjustable pulse voltage pulse width gradually increasing from the base pulse width to the termination pulse width, if there is at least one instance where the output voltage changes from the positive voltage of the bus to the negative voltage of the bus, the detection result is determined to be that the sealing device is close to the driver side.

[0112] During the process of the adjustable pulse voltage pulse width gradually increasing from the base pulse width to the termination pulse width, if the output voltage does not change from the positive voltage of the bus to the negative voltage of the bus each time, it is determined that the detection result is that the sealing device is close to the motor side.

[0113] Continue to refer to Figure 5 As shown, in this embodiment, the control contactor is opened and the star-sealing device is closed. An adjustable pulse voltage is input to switch S1, and a fixed pulse voltage is input to switch S4. When both switch S1 and switch S4 are turned on under the pulse voltage, if the star-sealing device is close to the driver side, a similar effect will be formed. Figure 5 In the loop shown by the red dashed line, the output voltage at the midpoint of the bridge arm containing S1 is the positive voltage of the bus. Subsequently, the switch S1 is turned off, and the current freewheels from the diode of S2, forming a similar circuit. Figure 5 The loop indicated by the blue dashed line clamps the voltage at the midpoint of the S1 bridge arm to the negative voltage of the bus. This means the output voltage at the midpoint of the bridge arm containing S1 changes from the positive to the negative bus voltage. Therefore, if, during the process of gradually increasing the pulse width of the adjustable pulse voltage from the base pulse width to the final pulse width, the output voltage at the midpoint of the bridge arm containing S1 changes from the positive to the negative bus voltage at least once, the detection result indicates that the star-sealing device is close to the driver side. If, after the switch S1 is turned off, the output voltage at the midpoint of the bridge arm containing S1 does not change from the positive to the negative bus voltage, it indicates that a loop cannot be formed. That is, during the process of gradually increasing the pulse width of the adjustable pulse voltage from the base pulse width to the final pulse width, the output voltage at the midpoint of the bridge arm containing S1 fails to change from the positive to the negative bus voltage, and the detection result indicates that the star-sealing device is close to the motor side.

[0114] See Figure 1 As shown, the elevator drive unit includes: a driver 100, a running contactor 200, a sealing device 300 (a short-circuiting device such as a contactor / relay), and a motor 400. Among them, the driver 100 has an output sampling function (i.e., it is equipped with a current detection module 101).

[0115] In actual elevator installation and operation scenarios, the following situations may cause the elevator system's star-sealing function to fail:

[0116] 1. The running contactor 200 and the sealing device 300 are connected in reverse order. Since the running contactor 200 is in the open state when sealing, when the sealing action is required, the sealing circuit cannot short-circuit the motor 400 winding because the running contactor 200 is disconnected, and thus the sealing function cannot be realized.

[0117] 2. The star-sealing device 300 fails. When the star-sealing device 300 is open, it cannot short-circuit the winding of the motor 400, thus causing the star-sealing function to fail.

[0118] See Figure 6 As shown, the specific detection scheme in this embodiment is as follows:

[0119] First, check if the sealing device is effective:

[0120] 1) In a stationary state, the driver controls the operation contactor to close (the reliability of operation is determined by the feedback contact), and the star-sealing device to close (there are no timing requirements for the operation of the operation contactor and the star-sealing device).

[0121] 2) Turn on two or three phase diagonal switches. For example, to turn on two phases: turn on S1 and S4; to turn on three phases: turn on S1, S4, and S6.

[0122] The operating requirements for the switching transistor are as follows:

[0123] a. The switching pulse width of the transistor needs to be set with a starting value Ta (i.e., the base pulse width) and an ending value Tb (i.e., the ending pulse width). There is a fixed step length ΔT (i.e., the preset increment step size) between Ta and Tb. (The switching pulse of the transistor can have various forms to achieve the above purpose, such as...) Figure 3 (Two of them);

[0124] b. Set an output current detection threshold (i.e., current threshold). A switching pulse is emitted from the initial value Ta and the current is checked to see if it reaches the output current setting threshold.

[0125] c. If the threshold is reached, determine whether to switch the detection target. If all three phases are turned on at once, for example, S1, S4, and S6, then detecting the current output value of two phases is sufficient to determine the malfunction of the star-sealing device. If only two phases are turned on, for example, S1 and S4 are turned on, and the U and V phases are detected first, then the target needs to be switched, and the detection should be repeated. In the second detection, S4 and S6 should be turned on, and the V and W phases should be detected to determine the malfunction of the star-sealing device. If both detections reach the current setting threshold, the star-sealing device can be judged to be in good condition. If the setting threshold is not reached, proceed to step d.

[0126] d. The adjustable pulse is used for the second detection. The pulse width of the second detection is the same as the pulse width of the first detection, but with an increase of ΔT, i.e., Ta+ΔT. The detection is performed in the same way.

[0127] e. If the detection threshold cannot be triggered even after the pulse width is increased to Tb, it can be determined that the sealing device is abnormal, and subsequent detection can be stopped and the corresponding fault can be reported.

[0128] If the previous steps have determined that the sealing device is functioning properly, then proceed to determine the position of the sealing device and the operating contactor:

[0129] Disconnect the running contactor, and the star-sealing device continues to close, outputting pulses according to the pulse width obtained in step c. If the current threshold detection is triggered, it indicates that the star-sealing device is at the front end of the running contactor (closer to the driver side), and a corresponding fault is reported. If the threshold detection is not triggered, it indicates that the star-sealing device is at the rear end of the running contactor (closer to the motor side).

[0130] It should be noted that, in this embodiment, the abnormality of the sealing device can be detected first, and then the position of the sealing device can be detected.

[0131] This invention provides a detection device for the sealing device of an elevator drive unit. See [link to relevant documentation]. Figure 7 As shown, Figure 7 This is a schematic block diagram of the detection device for the sealing star device of an elevator drive device according to an embodiment of the present invention. The elevator drive device includes: a driver, a running contactor, a sealing star device, and a motor. The three-phase output terminal of the driver is connected to the three-phase terminal of the motor through the running contactor. The detection device 70 for the sealing star device includes:

[0132] The control module 71 is used to control the operation contactor and the sealing device to close when the elevator is stationary; or, when the elevator is stationary, control the operation contactor to open and control the sealing device to close.

[0133] The execution module 72 is used to determine that at least two phases of the driver located in different bridge arms are test switch combinations, and to input pulse voltages to the test switch combinations one by one according to a preset pulse strategy. Furthermore, based on the output current value or output voltage value of at least one phase of the phase in which the test switch combination is located when the pulse voltage is input, the detection result of the star-sealing device is determined.

[0134] In some embodiments, optionally, the pulse strategy includes inputting an adjustable pulse voltage to at least one of the test switches in the test switch assembly, the pulse width of the adjustable pulse voltage being progressively increased from a base pulse width to a termination pulse width.

[0135] When the operating contactor and the sealing device are closed:

[0136] The execution module 72 is further configured to determine that the detection result is that the star-sealing device is normal if, during the process of the pulse width of the adjustable pulse voltage being increased from the basic pulse width to the termination pulse width, the output current value is greater than or equal to a preset current threshold at least once.

[0137] The execution module 72 is further configured to determine that the detection result is an abnormality of the star-sealing device if the output current value is less than the current threshold each time the pulse width of the adjustable pulse voltage is gradually increased from the basic pulse width to the termination pulse width.

[0138] In some embodiments, optionally, the pulse strategy includes inputting an adjustable pulse voltage to at least one of the test switches in the test switch assembly, the pulse width of the adjustable pulse voltage being progressively increased from a base pulse width to a termination pulse width.

[0139] When the operating contactor is disconnected and the sealing device is closed:

[0140] The execution module 72 is further configured to determine that the detection result is that the star-sealing device is close to the driver side if, during the process of the pulse width of the adjustable pulse voltage being increased from the basic pulse width to the termination pulse width at least once, the output current value is greater than or equal to a preset current threshold.

[0141] The execution module 72 is further configured to determine that the detection result is that the star-sealing device is close to the motor side if the output current value is less than the current threshold each time the pulse width of the adjustable pulse voltage is gradually increased from the basic pulse width to the termination pulse width.

[0142] In some embodiments, the pulse strategy may optionally include inputting an adjustable pulse voltage to all test switches in the test switch assembly;

[0143] During the process of gradually increasing the pulse width of the adjustable pulse voltage from the base pulse width to the termination pulse width, the pulse width of the adjustable pulse voltage input to each test switch is equal each time.

[0144] In some embodiments, the pulse strategy may optionally include inputting a first pulse voltage to other test switches in the test switch assembly that have not been inputted with the adjustable pulse voltage;

[0145] The pulse width of the first pulse voltage is a fixed value, and the pulse width of any of the adjustable pulse voltages is not equal to the pulse width of the first pulse voltage.

[0146] In some embodiments, optionally, the pulse width of the adjustable pulse voltage increases sequentially from the base pulse width to the termination pulse width according to a preset increment step size.

[0147] In some embodiments, the driver may optionally include a current detection module;

[0148] The execution module 72 is also used to measure the output current value using the current detection module.

[0149] In some embodiments, optionally, the pulse strategy includes inputting an adjustable pulse voltage to at least one of the test switches in the test switch assembly, the pulse width of the adjustable pulse voltage being progressively increased from a base pulse width to a termination pulse width.

[0150] When the operating contactor and the sealing device are closed:

[0151] The execution module 72 is further configured to determine that the detection result is that the star-sealing device is normal if, during the process of the adjustable pulse voltage pulse width gradually increasing from the basic pulse width to the termination pulse width, the output voltage changes from the positive voltage of the bus to the negative voltage of the bus at least once.

[0152] The execution module 72 is further configured to determine that the detection result is an abnormality of the star-sealing device if the output voltage fails to change from the positive voltage of the bus to the negative voltage of the bus each time the pulse width of the adjustable pulse voltage is gradually increased from the basic pulse width to the termination pulse width.

[0153] In some embodiments, optionally, the pulse strategy includes inputting an adjustable pulse voltage to at least one of the test switches in the test switch assembly, the pulse width of the adjustable pulse voltage being progressively increased from a base pulse width to a termination pulse width.

[0154] When the operating contactor is disconnected and the sealing device is closed:

[0155] The execution module 72 is further configured to determine that the detection result is that the star-sealing device is close to the driver side if, during the process of the adjustable pulse voltage pulse width being gradually increased from the basic pulse width to the termination pulse width, the output voltage changes from the positive voltage of the bus to the negative voltage of the bus at least once.

[0156] The execution module 72 is further configured to determine that the detection result is that the star-sealing device is close to the motor side if the output voltage does not change from the positive voltage of the bus to the negative voltage of the bus each time the pulse width of the adjustable pulse voltage is gradually increased from the basic pulse width to the termination pulse width.

[0157] The detection device for the sealing device provided in this embodiment of the invention can achieve Figures 1 to 6 The various processes implemented in the method embodiments achieve the same technical effect, and will not be described again here to avoid repetition.

[0158] This invention provides an electronic device 80, see [link to relevant documentation]. Figure 8 As shown, Figure 8 This is a schematic block diagram of an electronic device 80 according to an embodiment of the present invention, including a processor 81, a memory 82, and a program or instructions stored in the memory 82 and executable on the processor 81. When the program or instructions are executed by the processor, they implement the steps in the detection method of the sealing device of any elevator drive device of the present invention.

[0159] This invention provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement various processes of the detection method for the sealing device of the elevator drive device as described above, and achieve the same technical effect. To avoid repetition, further details are omitted here.

[0160] The readable storage medium may include, for example, read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk. In some examples, the readable storage medium may be a non-transient readable storage medium.

[0161] This invention also provides a computer program product, including computer instructions. When the computer instructions are executed by a processor, they implement various processes of the detection method embodiment for the sealing device of the elevator drive device described above, and can achieve the same technical effect. To avoid repetition, they will not be described again here.

[0162] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0163] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0164] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many modifications under the guidance of the present invention without departing from the spirit and scope of the claims, and all such modifications are within the protection scope of the present invention.

Claims

1. A method for detecting the sealing device of an elevator drive unit, characterized in that, The elevator drive unit includes: a driver, a running contactor, a star-sealing device, and a motor. The three-phase output terminal of the driver is connected to the three-phase terminal of the motor through the running contactor. The detection method for the star-sealing device includes: When the elevator is stationary, control the operation contactor and the sealing device to close. The switching transistors located in different bridge arms of at least two phases on the driver are identified as test switching transistor combinations. According to a preset pulse strategy, pulse voltages are successively input to the test switching transistor combinations. Furthermore, the detection result of the star-sealing device is determined based on the output current value of at least one phase of the phase in which the test switching transistor combination is located when the pulse voltage is input. The pulse strategy includes inputting an adjustable pulse voltage to at least one of the test switches in the test switch combination, wherein the pulse width of the adjustable pulse voltage increases sequentially from the base pulse width to the termination pulse width. The detection result of the star-sealing device is determined based on the output current value of at least one phase of the phase in which the test switch assembly is located when the pulse voltage is input, including: During the process of the adjustable pulse voltage pulse width gradually increasing from the base pulse width to the termination pulse width, if there is at least one instance where the output current value is greater than or equal to a preset current threshold, the detection result is determined to be that the sealing device is normal. During the process of gradually increasing the pulse width of the adjustable pulse voltage from the base pulse width to the termination pulse width, if the output current value is less than the current threshold each time, the detection result is determined to be an abnormality of the sealing device.

2. The detection method for the sealing device of the elevator drive unit according to claim 1, characterized in that, The pulse strategy includes inputting an adjustable pulse voltage to all test switches in the test switch assembly; During the process of gradually increasing the pulse width of the adjustable pulse voltage from the base pulse width to the termination pulse width, the pulse width of the adjustable pulse voltage input to each test switch is equal each time.

3. The detection method for the sealing device of the elevator drive unit according to claim 1, characterized in that, The pulse strategy also includes inputting a first pulse voltage to other test switches in the test switch assembly that have not been inputted with the adjustable pulse voltage; The pulse width of the first pulse voltage is a fixed value, and the pulse width of any of the adjustable pulse voltages is not equal to the pulse width of the first pulse voltage.

4. The detection method for the sealing device of the elevator drive unit according to claim 1, characterized in that, According to a preset increment step size, the pulse width of the adjustable pulse voltage increases sequentially from the base pulse width to the termination pulse width.

5. The detection method for the sealing device of the elevator drive unit according to claim 1, characterized in that, The driver includes a current detection module; The detection result of the star-sealing device is determined based on the output current value of at least one phase of the phase in which the test switch assembly is located when the pulse voltage is input, including the following: The output current value is measured using the current detection module.

6. A method for detecting the sealing device of an elevator drive unit, characterized in that, The elevator drive unit includes: a driver, a running contactor, a star-sealing device, and a motor. The three-phase output terminal of the driver is connected to the three-phase terminal of the motor through the running contactor. The detection method for the star-sealing device includes: When the elevator is stationary, control the operation contactor to open and control the sealing device to close; The switching transistors located in different bridge arms of at least two phases on the driver are identified as test switching transistor combinations. According to a preset pulse strategy, pulse voltages are successively input to the test switching transistor combinations. Furthermore, the detection result of the star-sealing device is determined based on the output current value of at least one phase of the phase in which the test switching transistor combination is located when the pulse voltage is input. The pulse strategy includes inputting an adjustable pulse voltage to at least one of the test switches in the test switch combination, wherein the pulse width of the adjustable pulse voltage increases sequentially from the base pulse width to the termination pulse width. The detection result of the star-sealing device is determined based on the output current value of at least one phase of the phase in which the test switch assembly is located when the pulse voltage is input, including: During the process of the adjustable pulse voltage pulse width gradually increasing from the base pulse width to the termination pulse width, if there is at least one instance where the output current value is greater than or equal to a preset current threshold, the detection result is determined to be that the sealing device is close to the driver side. During the process of the adjustable pulse voltage pulse width gradually increasing from the base pulse width to the termination pulse width, if the output current value is less than the current threshold each time, the detection result is determined to be that the sealing device is close to the motor side.

7. The detection method for the sealing device of the elevator drive unit according to claim 6, characterized in that, The pulse strategy includes inputting an adjustable pulse voltage to all test switches in the test switch assembly; During the process of gradually increasing the pulse width of the adjustable pulse voltage from the base pulse width to the termination pulse width, the pulse width of the adjustable pulse voltage input to each test switch is equal each time.

8. The detection method for the sealing device of the elevator drive unit according to claim 6, characterized in that, The pulse strategy also includes inputting a first pulse voltage to other test switches in the test switch assembly that have not been inputted with the adjustable pulse voltage; The pulse width of the first pulse voltage is a fixed value, and the pulse width of any of the adjustable pulse voltages is not equal to the pulse width of the first pulse voltage.

9. The detection method for the sealing device of the elevator drive unit according to claim 6, characterized in that, According to a preset increment step size, the pulse width of the adjustable pulse voltage increases sequentially from the base pulse width to the termination pulse width.

10. The detection method for the sealing device of the elevator drive unit according to claim 6, characterized in that, The driver includes a current detection module; The detection result of the star-sealing device is determined based on the output current value of at least one phase of the phase in which the test switch assembly is located when the pulse voltage is input, including the following: The output current value is measured using the current detection module.

11. A method for detecting the sealing device of an elevator drive unit, characterized in that, The elevator drive unit includes: a driver, a running contactor, a star-sealing device, and a motor. The three-phase output terminal of the driver is connected to the three-phase terminal of the motor through the running contactor. The detection method for the star-sealing device includes: When the elevator is stationary, control the operation contactor and the sealing device to close. The switching transistors located in different bridge arms of at least two phases on the driver are identified as test switching transistor combinations. According to a preset pulse strategy, pulse voltages are successively input to the test switching transistor combinations. Based on the output voltage value of at least one phase of the phase in which the test switching transistor combination is located when the pulse voltage is input, the detection result of the star sealing device is determined. The pulse strategy includes inputting an adjustable pulse voltage to at least one of the test switches in the test switch combination, wherein the pulse width of the adjustable pulse voltage increases sequentially from the base pulse width to the termination pulse width. The detection result of the satellite sealing device is determined based on the output voltage value of at least one phase of the phase in which the test switch assembly is located when the pulse voltage is input, including: During the process of the adjustable pulse voltage pulse width gradually increasing from the base pulse width to the termination pulse width, if there is at least one instance where the output voltage changes from the positive voltage of the bus to the negative voltage of the bus, the detection result is determined to be that the sealing device is normal. If, during the process of gradually increasing the pulse width of the adjustable pulse voltage from the base pulse width to the termination pulse width, the output voltage fails to change from the positive voltage of the bus to the negative voltage of the bus each time, the detection result is determined to be an abnormality of the sealing device.

12. A method for detecting the sealing device of an elevator drive unit, characterized in that, The elevator drive unit includes: a driver, a running contactor, a star-sealing device, and a motor. The three-phase output terminal of the driver is connected to the three-phase terminal of the motor through the running contactor. The detection method for the star-sealing device includes: When the elevator is stationary, control the operation contactor to open and control the sealing device to close; The switching transistors located in different bridge arms of at least two phases on the driver are identified as test switching transistor combinations. According to a preset pulse strategy, pulse voltages are successively input to the test switching transistor combinations. Based on the output voltage value of at least one phase of the phase in which the test switching transistor combination is located when the pulse voltage is input, the detection result of the star sealing device is determined. The pulse strategy includes inputting an adjustable pulse voltage to at least one of the test switches in the test switch combination, wherein the pulse width of the adjustable pulse voltage increases sequentially from the base pulse width to the termination pulse width. The detection result of the satellite sealing device is determined based on the output voltage value of at least one phase of the phase in which the test switch assembly is located when the pulse voltage is input, including: During the process of the adjustable pulse voltage pulse width gradually increasing from the base pulse width to the termination pulse width, if there is at least one instance where the output voltage changes from the positive voltage of the bus to the negative voltage of the bus, the detection result is determined to be that the sealing device is close to the driver side. During the process of the adjustable pulse voltage pulse width gradually increasing from the base pulse width to the termination pulse width, if the output voltage does not change from the positive voltage of the bus to the negative voltage of the bus each time, it is determined that the detection result is that the sealing device is close to the motor side.

13. A detection device for the sealing device of an elevator drive unit, characterized in that, The elevator drive unit includes: a driver, a running contactor, a star-sealing device, and a motor. The three-phase output terminal of the driver is connected to the three-phase terminal of the motor through the running contactor. The detection device of the star-sealing device includes: The control module is used to control the closing of the running contactor and the sealing device when the elevator is stationary. The execution module is used to determine that at least two phases of the driver have switching transistors located in different bridge arms as test switching transistor combinations, and to input pulse voltages to the test switching transistor combinations one by one according to a preset pulse strategy. Furthermore, based on the output current value of at least one phase of the phase in which the test switching transistor combinations are located when the pulse voltage is input, the detection result of the star-sealing device is determined. The pulse strategy includes inputting an adjustable pulse voltage to at least one of the test switches in the test switch combination, wherein the pulse width of the adjustable pulse voltage increases sequentially from the base pulse width to the termination pulse width. The execution module is further configured to determine that the detection result is that the star-sealing device is normal if, during the process of the adjustable pulse voltage pulse width being increased from the basic pulse width to the termination pulse width, the output current value is greater than or equal to a preset current threshold at least once. The execution module is further configured to determine that the detection result is an abnormality of the star-sealing device if the output current value is less than the current threshold each time the pulse width of the adjustable pulse voltage is gradually increased from the base pulse width to the termination pulse width.

14. A detection device for the sealing device of an elevator drive unit, characterized in that, The elevator drive unit includes: a driver, a running contactor, a star-sealing device, and a motor. The three-phase output terminal of the driver is connected to the three-phase terminal of the motor through the running contactor. The detection device of the star-sealing device includes: The control module is used to control the operation contactor to open and the sealing device to close when the elevator is stationary. The execution module is used to determine that at least two phases of the driver have switching transistors located in different bridge arms as test switching transistor combinations, and to input pulse voltages to the test switching transistor combinations one by one according to a preset pulse strategy. Furthermore, based on the output current value of at least one phase of the phase in which the test switching transistor combinations are located when the pulse voltage is input, the detection result of the star-sealing device is determined. The pulse strategy includes inputting an adjustable pulse voltage to at least one of the test switches in the test switch combination, wherein the pulse width of the adjustable pulse voltage increases sequentially from the base pulse width to the termination pulse width. The execution module is further configured to determine that the detection result is that the star-sealing device is close to the driver side if, during the process of the adjustable pulse voltage pulse width being increased from the basic pulse width to the termination pulse width at least once, the output current value is greater than or equal to a preset current threshold. The execution module is further configured to determine, during the process of the adjustable pulse voltage pulse width gradually increasing from the base pulse width to the termination pulse width, if the output current value is less than the current threshold each time, that the detection result is that the sealing device is close to the motor side.

15. A detection device for the sealing device of an elevator drive unit, characterized in that, The elevator drive unit includes: a driver, a running contactor, a star-sealing device, and a motor. The three-phase output terminal of the driver is connected to the three-phase terminal of the motor through the running contactor. The detection device of the star-sealing device includes: The control module is used to control the closing of the running contactor and the sealing device when the elevator is stationary. The execution module is used to determine that at least two phases of the driver have switching transistors located in different bridge arms as test switching transistor combinations, and to input pulse voltages to the test switching transistor combinations one by one according to a preset pulse strategy. Furthermore, based on the output voltage value of at least one phase of the phase in which the test switching transistor combinations are located when the pulse voltage is input, the detection result of the star-sealing device is determined. The pulse strategy includes inputting an adjustable pulse voltage to at least one of the test switches in the test switch combination, wherein the pulse width of the adjustable pulse voltage increases sequentially from the base pulse width to the termination pulse width. The execution module is further configured to determine that the detection result is that the star-sealing device is normal if, during the process of the adjustable pulse voltage pulse width being gradually increased from the basic pulse width to the termination pulse width, the output voltage changes from the positive voltage of the bus to the negative voltage of the bus at least once. The execution module is further configured to determine that the detection result is an abnormality of the star-sealing device if the output voltage fails to change from the positive voltage of the bus to the negative voltage of the bus each time the pulse width of the adjustable pulse voltage is gradually increased from the basic pulse width to the termination pulse width.

16. A detection device for the sealing device of an elevator drive unit, characterized in that, The elevator drive unit includes: a driver, a running contactor, a star-sealing device, and a motor. The three-phase output terminal of the driver is connected to the three-phase terminal of the motor through the running contactor. The detection device of the star-sealing device includes: The control module is used to control the operation contactor to open and the sealing device to close when the elevator is stationary. The execution module is used to determine that at least two phases of the driver have switching transistors located in different bridge arms as test switching transistor combinations, and to input pulse voltages to the test switching transistor combinations one by one according to a preset pulse strategy. Furthermore, based on the output voltage value of at least one phase of the phase in which the test switching transistor combinations are located when the pulse voltage is input, the detection result of the star-sealing device is determined. The pulse strategy includes inputting an adjustable pulse voltage to at least one of the test switches in the test switch combination, wherein the pulse width of the adjustable pulse voltage increases sequentially from the base pulse width to the termination pulse width. The execution module is further configured to determine that the detection result is that the star-sealing device is close to the driver side if, during the process of the adjustable pulse voltage pulse width being gradually increased from the basic pulse width to the termination pulse width, the output voltage changes from the positive voltage of the bus to the negative voltage of the bus at least once. The execution module is further configured to determine that the detection result is that the star-sealing device is close to the motor side if the output voltage does not change from the positive voltage of the bus to the negative voltage of the bus each time the pulse width of the adjustable pulse voltage is gradually increased from the basic pulse width to the termination pulse width.

17. An electronic device, characterized in that: It includes a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps in the detection method of the sealing device of the elevator drive device as claimed in any one of claims 1 to 12.

18. A readable storage medium, characterized in that: The readable storage medium stores a program or instructions that, when executed by a processor, implement the steps in the detection method of the sealing device of the elevator drive device as described in any one of claims 1 to 12.

19. A computer program product, characterized in that, The method includes computer instructions that, when executed by a processor, implement the steps of the detection method for the sealing device of the elevator drive unit as described in any one of claims 1 to 12.

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