Elevator star-sealing function detection method, device, equipment, and storage medium

Abstract

The present invention belongs to the technical field of elevator detection and discloses a method and device, equipment, and storage medium for detecting the star-sealing function of an elevator. When performing the star-sealing function detection of an elevator, a current path is formed by connecting a resistor in parallel to the main contact of a running contactor and the star-sealing contactor contact or a traction machine. Thus, in both cases where the star-sealing contactor is normally closed and abnormally open, a current path can be formed between any two of the three output terminals of a frequency converter. In the two cases, changes in the feedback current flowing through the current path are different. It is only necessary to control the output voltage pulse signal between two of the output terminals of the frequency converter and detect the feedback current change signal on the current path to determine whether the star-sealing contactor is normally closed, thereby completing the star-sealing function detection of the elevator. The detection speed is improved, and there is no need to slide the elevator for testing, which can improve the user experience.

Description

Technical Field

[0001] The present invention belongs to the technical field of elevator detection, and in particular relates to a method and device, equipment, and storage medium for detecting an elevator star-sealing function. Background Art

[0002] At present, most elevators that use permanent magnet synchronous traction machines as drive devices are equipped with star-locking contactors. The elevator will execute the star-locking function (the star-locking contactor contacts are closed, short-circuiting the three phase lines of the permanent magnet synchronous motor) after each operation and stop. The star-locking function can limit the elevator's sliding speed when the elevator brake fails, thereby ensuring the safety of passengers as much as possible.

[0003] The way to test whether the star-sealing function is effective is generally to test it by sliding the elevator. The specific operation method is: when the elevator stops running and the star-sealing function is activated, release the elevator brake manually or automatically, and observe the free sliding speed and acceleration of the elevator in an unbalanced state. If the speed and acceleration are less than a certain range, it is considered that the star-sealing function is effective, otherwise it is invalid. It is necessary to investigate and determine whether there is a problem with the star-sealing contactor itself or the star-sealing wiring.

[0004] The existing method of testing the sealing function of a sliding elevator has a relatively cumbersome operation process. It requires opening the brake, detecting the feedback speed, and controlling the elevator to return to the initial test position after the test is completed, which is time-consuming. In addition, if there is an abnormality in the sealing function, it may cause a large sliding speed. At this time, an emergency stop will have a great impact on the entire elevator machinery and may also scare people waiting for the elevator, resulting in a poor user experience. There is still much room for improvement. Summary of the Invention

[0005] The object of the present invention is to provide a method and device, equipment, and storage medium for detecting the star-sealing function of an elevator, which can increase the detection speed and eliminate the need for sliding the elevator for testing, thereby improving the user experience.

[0006] A first aspect of the present invention discloses a method for detecting a star-sealing function of an elevator, which is applied to an elevator electrical device. The elevator electrical device includes a frequency converter, a traction machine, a running contactor, and a star-sealing contactor. The three output terminals of the frequency converter are respectively connected to the three input terminals of the traction machine. The three contacts of the running contactor are correspondingly arranged between the frequency converter and the traction machine. The three contacts of the star-sealing contactor are correspondingly arranged between the running contactor and the traction machine. Resistors are respectively connected in parallel to the two ends of the three contacts of the running contactor. The method includes:

[0007] Controlling the frequency converter to output a voltage pulse signal between any two target output terminals among its three output terminals;

[0008] detecting a feedback current change signal formed on a current path between the two target output terminals;

[0009] A star sealing function detection result between two input terminals connected to the two target output terminals on the traction machine is determined according to the feedback current change signal; wherein the star sealing function detection result is used to indicate whether the star sealing function is normal or abnormal.

[0010] A second aspect of the present invention discloses an elevator star-sealing function detection device, which is applied to an elevator electrical device. The elevator electrical device includes a frequency converter, a traction machine, a running contactor, and a star-sealing contactor. The three output terminals of the frequency converter are respectively connected to the three input terminals of the traction machine. The three contacts of the running contactor are correspondingly arranged between the frequency converter and the traction machine. The three contacts of the star-sealing contactor are correspondingly arranged between the running contactor and the traction machine. Resistors are respectively connected in parallel to the two ends of the three contacts of the running contactor. The detection device includes:

[0011] An output unit, used for controlling the frequency converter to output a voltage pulse signal between any two target output terminals among its three output terminals;

[0012] a detection unit, configured to detect a feedback current change signal formed on a current path between the two target output terminals;

[0013] A discrimination unit is used to determine a star-sealing function detection result between two input terminals connected to the two target output terminals on the traction machine according to the feedback current change signal; wherein the star-sealing function detection result is used to indicate whether the star-sealing function is normal or abnormal.

[0014] A third aspect of the present invention discloses an electronic device, comprising a memory storing executable program code and a processor coupled to the memory; the processor calls the executable program code stored in the memory to execute the elevator star-sealing function detection method disclosed in the first aspect.

[0015] A fourth aspect of the present invention discloses a computer-readable storage medium storing a computer program, wherein the computer program enables a computer to execute the elevator star-sealing function detection method disclosed in the first aspect.

[0016] The beneficial effect of the present invention lies in that the provided elevator star-sealing function detection method, device, equipment, and storage medium form a current path through a resistor connected in parallel to the main contact of the running contactor and the star-sealing contactor contact or the traction machine during the elevator star-sealing function detection. Thus, in both cases where the star-sealing contactor is normally closed and abnormally open, a current path can be formed between any two of the three output terminals of the inverter. When the star-sealing contactor is normally closed, current flows through the star-sealing contactor contacts, while when the star-sealing contactor is abnormally open, current flows through the traction machine. The impedance of the star-sealing contactor contacts is much smaller than the impedance of the traction machine coil. Therefore, the change in the feedback current flowing through the current path in the two cases is different. By simply controlling the output voltage pulse signal between two output terminals of the inverter and then detecting the feedback current change signal on the current path, it is possible to identify whether the current is flowing through the star-sealing contactor, thereby determining whether the star-sealing contactor is normally closed, and completing the elevator star-sealing function detection. The detection speed is improved, and there is no need to slide the elevator for testing, which can improve the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings herein illustrate specific examples of the technical solutions described in the present invention, and together with the specific implementation methods constitute a part of the specification, and are used to explain the technical solutions, principles and effects of the present invention.

[0018] Unless otherwise specified or defined, the same reference numerals in different drawings represent the same or similar technical features, and the same or similar technical features may also be represented by different reference numerals.

[0019] Figure 1 This is a schematic structural diagram of an elevator electrical device disclosed in an embodiment of the present invention;

[0020] Figure 2 This is a flow chart of a method for detecting the star-sealing function of an elevator disclosed in an embodiment of the present invention;

[0021] Figure 3 This is a feedback current waveform diagram for rapid detection of an elevator star-sealing function disclosed in an embodiment of the present invention;

[0022] Figure 4 It is a structural diagram of another elevator electrical device disclosed in an embodiment of the present invention;

[0023] Figure 5 This is a flow chart of another elevator star-sealing function detection method disclosed in an embodiment of the present invention;

[0024] Figure 6 This is a structural diagram of an elevator star-sealing function detection device disclosed in an embodiment of the present invention;

[0025] Figure 7It is a structural diagram of an electronic device disclosed in an embodiment of the present invention.

[0026] Description of reference numerals:

[0027] 601, output unit; 602, detection unit; 603, determination unit; 604, switch unit; 701, memory; 702, processor. DETAILED DESCRIPTION

[0028] Unless otherwise specified or defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art. In the context of combining the technical solution of the present invention with realistic scenarios, all technical and scientific terms used herein may also have meanings corresponding to the purpose of implementing the technical solution of the present invention. "First, second..." used herein is merely used to distinguish names and does not represent a specific quantity or order. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0029] It should be noted that when an element is considered to be "fixed to" another element, it can be directly fixed to the other element or there can be an intermediate element; when an element is considered to be "connected to" another element, it can be directly connected to the other element or there can be an intermediate element; when an element is considered to be "mounted on" another element, it can be directly mounted on the other element or there can be an intermediate element. When an element is considered to be "located on" another element, it can be directly located on the other element or there can be an intermediate element.

[0030] Unless otherwise specified or defined, the “said” and “the” used in this document refer to the technical features or technical contents mentioned or described before the corresponding position, and the technical features or technical contents may be the same as or similar to the technical features or technical contents mentioned therein.

[0031] There is no doubt that technical contents or technical features that are contrary to the purpose of the present invention or are obviously contradictory should be excluded.

[0032] In order to facilitate understanding of the present invention, the specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Figure 1 As shown, an embodiment of the present invention discloses an elevator electrical device, including a frequency converter, a traction machine, a running contactor MC and a star-closing contactor KFX. For the running contactor MC and the star-closing contactor KFX, only the main contact parts are drawn in the figure.

[0033] Among them, the three output terminals U1, V1, and W1 of the inverter are respectively connected to the three input terminals U2, V2, and W2 of the traction machine, that is, the three phase line terminals. The three main contacts of the running contactor MC are correspondingly arranged between the three output terminals U1, V1, and W1 of the inverter and the three input terminals U2, V2, and W2 of the traction machine. The three main contacts of the star-sealing contactor KFX are correspondingly arranged between the running contactor MC and the traction machine. L11, L12, and L13 represent the connecting lines between the main contacts of the star-sealing contactor KFX and the three phase lines of the traction machine. The two ends of the three main contacts of the running contactor MC are respectively connected in parallel with a resistor R1, R2, and R3 of appropriate specifications. Generally, preferably, the resistance is less than 1000 ohms and the power is less than 100 watts.

[0034] When an elevator stops, the main contacts of the run contactor MC are disconnected, and the main contacts of the shutoff contactor KFX are closed. U2, V2, and W2 (the three phase lines of the traction machine) are short-circuited through the shutoff contactor KFX, achieving the shutoff function. In conventional elevator electrical systems, however, U1, V1, and W1 are completely disconnected from U2, V2, and W2. In the present invention, however, U1, V1, and W1 are connected to U2, V2, and W2, respectively, via the aforementioned resistors R1, R2, and R3. In other words, the three resistors connected in parallel to the main contacts of the run contactor MC form a current path with the contacts of the shutoff contactor KFX or the traction machine.

[0035] Therefore, in both cases where the star-sealing contactor is normally closed and abnormally open, a current path can be formed between any two of the three output terminals of the inverter. When the star-sealing contactor is normally closed, the current flows through the star-sealing contactor contacts, and when the star-sealing contactor is abnormally open, the current flows through the traction machine. The impedance of the star-sealing contactor contacts is much smaller than the impedance of the traction machine coil. Therefore, the changes in the feedback current flowing through the current path in the two cases are different. It is only necessary to control the output voltage pulse signal between two of the output terminals of the inverter, and then detect the feedback current change signal on the current path to identify whether the current flows through the star-sealing contactor, thereby determining whether the star-sealing contactor is normally closed and completing the elevator star-sealing function detection.

[0036] like Figure 2 As shown, the embodiment of the present invention discloses a method for detecting the star-sealing function of an elevator, which is applied to Figure 1 The elevator electrical device shown in FIG. This method can be implemented through computer programming. The method can be performed by a computer-programmable detection device, such as an elevator control motherboard or microcontroller, or an electronic device such as a computer, laptop, or tablet computer equipped with the detection device, but the present invention is not limited thereto. In this embodiment, the elevator control motherboard is used as an example for illustration. The method includes the following steps S201 to S203:

[0037] S201. The elevator control mainboard controls the frequency converter to output a voltage pulse signal between any two target output terminals among its three output terminals.

[0038] Generally, when the elevator control mainboard detects that the elevator has stopped running, it will control the three main contacts of the running contactor MC to be disconnected and the three main contacts of the star-sealing contactor KFX to be closed. At this time, after receiving the control closing instruction from the elevator control mainboard, the star-sealing contactor KFX will perform the so-called "closing action" and then feedback to the elevator control mainboard. However, there may actually be an abnormal situation, that is, after the star-sealing contactor performs the so-called "closing action", it does not actually close and is still in an abnormal open circuit state.

[0039] Therefore, in this embodiment of the present invention, the elevator control mainboard can activate the star-locking function detection mode to perform the elevator star-locking function detection when it detects that the elevator has stopped running and detects the action feedback signal of the star-locking contactor. That is, it executes steps S201 to S203.

[0040] S202: The elevator control mainboard detects a feedback current change signal formed on the current path between the two target output terminals.

[0041] S203: The elevator control mainboard determines a star-sealing function test result between two input terminals connected to two target output terminals on the traction machine based on the feedback current change signal. The star-sealing function test result indicates whether the star-sealing function is normal or abnormal.

[0042] During the detection of the star-sealing function, the elevator control mainboard controls the frequency converter to select any two of its three output terminals as the target output terminals, and then controls the frequency converter to output a short-time voltage pulse signal (for example, a pulse width of less than 2 milliseconds) between the two target output terminals. The short-time voltage pulse signal should be different from that during normal operation of the elevator. Through the three resistors connected in parallel at both ends of the running contactor contacts, a current path is formed with the contacts of the star-sealing contactor. Based on the feedback current change signal of the feedback current, the rising edge shape of the feedback current and the current peak value can be obtained to determine whether there is an abnormality in the star-sealing circuit.

[0043] like Figure 3 As shown in the figure, when the star-sealing function is normal, the rising edge of the feedback current is a step with a short rise time; when the star-sealing function is abnormal, the rising edge of the feedback current is a ramp with a long rise time. The peak current of the feedback current is significantly higher when the star-sealing function is normal than when the star-sealing function is abnormal. The rising edge shape and peak current of the feedback current under normal and abnormal star-sealing function conditions can be obtained through self-learning before the elevator is put into use.

[0044] That is to say, for Figure 3 The feedback current waveform shown can be learned by the operator using the learning mode before the elevator is delivered to the user. The elevator control motherboard can learn and store the feedback current waveforms when the star-sealing function is normal and when the star-sealing function is abnormal, so as to better match the elevator systems of different power levels and improve the accuracy of the star-sealing function detection results.

[0045] Taking the output voltage pulse signal between U1 and V1 as an example (W1 is in a high-impedance state at this time), when the star-sealing contactor KFX contacts are normally closed and the L11 and L12 cables are properly connected, since the impedance of the star-sealing contactor KFX contacts is much smaller than the impedance of the traction motor coil, the current path between the two target output terminals U1 and V1 is: U1->R1->L11->star-sealing contactor contacts->L12->R2->V1. Since the resistance value in this loop is fixed and there is no inductance, the feedback current rises quickly (the rising edge is a step shape) and the current peak is stable.

[0046] If the KFX contact of the star-sealing contactor cannot be closed, or the L11 or L12 wiring is abnormal and causes an open circuit, the current path between the two target output terminals U1 and V1 is: U1->R1->U2->V2->R2->V1. Due to the large coil impedance and inductance of the traction motor, the feedback current has a long rise time (the rising edge is a ramp shape), and the current peak is significantly lower than when the star-sealing function is normal (such as Figure 3 As shown), it can be clearly judged whether the star sealing function between U2 and V2 is normal.

[0047] Similarly, using U1 and W1 as the target output terminals and outputting a short voltage pulse signal between U1 and W1 can test the star-sealing function between U2 and W2. Using V1 and W1 as the target output terminals and outputting a short voltage pulse signal between V1 and W1 can test the star-sealing function between V2 and W2. Based on the above test results, it can be determined whether the elevator star-sealing function is normal.

[0048] As an optional implementation, step S203 may include:

[0049] Determine the duration of the feedback current rising to the current peak value according to the feedback current change signal;

[0050] Determining whether the duration is less than a first preset threshold;

[0051] If the duration is less than the first preset threshold, it is determined that the star-sealing function between the two input terminals connected to the two target output terminals on the traction machine is normal;

[0052] If the duration is not less than the first preset threshold, it is determined that the star-sealing function between the two input terminals connected to the two target output terminals on the traction machine is abnormal.

[0053] As another optional implementation, step S203 may include:

[0054] Determine the current peak value of the feedback current according to the feedback current change signal;

[0055] Determining whether the current peak value is greater than a second preset threshold;

[0056] If the current peak value is greater than the second preset threshold, it is determined that the star-sealing function between the two input terminals connected to the two target output terminals on the traction machine is normal;

[0057] If the current peak value is not greater than the second preset threshold value, it is determined that the star-sealing function between the two input terminals connected to the two target output terminals on the traction machine is abnormal.

[0058] It is understood that, as a preferred embodiment, when the duration of the feedback current rising to the current peak is less than a first preset threshold, and the current peak is greater than a second preset threshold, the star-sealing function between the two input terminals connected to the two target output terminals of the traction machine can be determined to be normal; and when the duration of the feedback current rising to the current peak is not less than the first preset threshold, and the current peak is not greater than the second preset threshold, the star-sealing function between the two input terminals connected to the two target output terminals of the traction machine can be determined to be abnormal. This can further improve the accuracy of the judgment. Of course, it is not ruled out that the rising edge shape of the feedback current, whether it is a step shape or a ramp shape, can be used to determine whether the star-sealing function between the two input terminals connected to the two target output terminals of the traction machine is normal.

[0059] Compared to traditional elevator slip detection, which takes several seconds or even tens of seconds and cannot be performed after each elevator run, resulting in the possibility of delayed fault detection, the elevator star-sealing function detection method provided by the present invention has a very fast detection speed of less than 300 milliseconds, which can meet the requirement of performing a test after each elevator run. Therefore, star-sealing function faults can be discovered more promptly. Moreover, the detection is performed when the elevator is stopped, eliminating the need for the elevator to slip. There is no impact on the elevator machinery or on waiting passengers, which can improve the user experience. In addition, few additional components are required, the cost is low, and the detection accuracy is high.

[0060] For some special occasions, it may not be acceptable to connect the resistors R1, R2, and R3 in parallel at both ends of the running contactor. In this case, a switch contactor can be added. Figure 4 As shown, the embodiment of the present invention discloses another more preferred elevator electrical device, Figure 1The elevator electrical system shown in the figure differs in that a switch contactor TFX is added (only the main contacts are shown in the figure). Switch contactor TFX is located between one end of the three contacts of the operating contactor and the resistor. During the star-off function test, the elevator control board controls the switch contactor TFX to close. After the test is complete, the switch contactor TFX is controlled to open, enabling the connection and disconnection of resistors R1, R2, and R3.

[0061] like Figure 5 As shown, the embodiment of the present invention discloses another elevator star sealing function detection method, which is applied to Figure 4 The elevator electrical device shown in FIG. 1 includes the following steps S501 to S507:

[0062] S501: The elevator control main board detects whether the switch contactor is in a closed state.

[0063] The elevator control mainboard includes a processor CPU, an input port for detecting the action feedback of the star-blocking contactor, an output port for independently driving the running contactor and the star-blocking contactor, and a control port for independently controlling electrical components such as the frequency converter and the brake contactor.

[0064] After the elevator completes its current run and stops, the elevator control board controls the brake contactor to close, the run contactor to open, and receives an action feedback signal from the star-off contactor. It then detects whether the switch contactor is in the closed state. If the switch contactor is in the closed state, the process proceeds to step S503.

[0065] S502: If the switch contactor is not in a closed state, the elevator control main board controls the switch contactor to close.

[0066] S503: The elevator control mainboard controls the frequency converter to output a voltage pulse signal between any two target output terminals among its three output terminals.

[0067] S504: The elevator control mainboard detects a feedback current change signal formed on the current path between the two target output terminals.

[0068] S505: The elevator control mainboard determines the star-sealing function test result between the two input terminals connected to the two target output terminals on the traction machine based on the feedback current change signal. The star-sealing function test result is used to indicate whether the star-sealing function is normal or abnormal.

[0069] The specific implementation of the above steps S503 to S505 can be found in the description of the above steps S201 to S203, which will not be elaborated herein.

[0070] S506: If the star-sealing function detection result indicates that the star-sealing function is abnormal, the elevator control main board outputs a fault prompt message.

[0071] S507: The elevator control mainboard controls the switch contactor to be disconnected.

[0072] There is no strict time sequence relationship between steps S506 and S507.

[0073] When the star-sealing function test is being performed, the elevator control main board closes the switch contactor TFX, and after the test is completed, the switch contactor TFX is opened to control the connection and disconnection of the resistors R1, R2, and R3. This can prevent the resistors R1, R2, and R3 from being connected in parallel at both ends of the operating contactor contacts, and can also prevent false triggering of the elevator star-sealing function test method, thereby improving safety and reliability.

[0074] like Figure 6 As shown, the embodiment of the present invention discloses an elevator star sealing function detection device, such as an elevator control mainboard, which is applied to Figure 1 The elevator electrical device shown in FIG. 1 includes an output unit 601, a detection unit 602, a determination unit 603, and a switch unit 604, wherein:

[0075] The output unit 601 is used to control the frequency converter to output a voltage pulse signal between any two target output terminals among its three output terminals;

[0076] a detection unit 602, configured to detect a feedback current change signal formed on a current path between two target output terminals;

[0077] The determination unit 603 is used to determine the star-sealing function detection result between the two input terminals connected to the two target output terminals on the traction machine according to the feedback current change signal; wherein the star-sealing function detection result is used to indicate whether the star-sealing function is normal or abnormal.

[0078] In order to further make the detection device suitable for Figure 4 The elevator electrical device shown in the figure may further include a switch unit 604, which is used to detect whether the switch contactor is in a closed state before the output unit 601 controls the frequency converter to output a voltage pulse signal between any two target output terminals of its three output terminals; if the switch contactor is in a closed state, the output unit 601 is triggered to execute the operation of controlling the frequency converter to output a voltage pulse signal between any two target output terminals of its three output terminals; if the switch contactor is not in a closed state, the switch contactor is controlled to be closed; and after the discrimination unit 603 determines the star-sealing function detection result between the two input terminals connected to the two target output terminals on the traction machine according to the feedback current change signal, the switch contactor is controlled to be opened.

[0079] Preferably, the detection device may also include a prompt unit not shown in the figure, which is used to output fault prompt information if the star-sealing function detection result is used to characterize the abnormality of the star-sealing function after the discrimination unit 603 determines the star-sealing function detection result between the two input terminals connected to the two target output terminals on the traction machine based on the feedback current change signal.

[0080] Preferably, the detection device may further include a starting unit (not shown) for controlling the three contacts of the running contactor to be disconnected when the elevator stops running, and then triggering the switch unit 604 to detect whether the switch contactor is in a closed state.

[0081] The above-mentioned switch unit 604 is used to detect whether the switch contactor is in a closed state in the following manner: after the above-mentioned starting unit controls the three contacts of the running contactor to be disconnected, it is determined whether the action feedback signal of the star-sealing contactor is detected; if the action feedback signal of the star-sealing contactor is detected, it is detected whether the switch contactor is in a closed state.

[0082] like Figure 7 As shown, an embodiment of the present invention discloses an electronic device, including a memory 701 storing executable program code and a processor 702 coupled to the memory 701;

[0083] The processor 702 calls the executable program code stored in the memory 701 to execute the elevator star-sealing function detection method described in the above embodiments.

[0084] An embodiment of the present invention further discloses a computer-readable storage medium storing a computer program, wherein the computer program enables a computer to execute the elevator star-sealing function detection method described in the above embodiments.

[0085] The purpose of the above embodiments is to exemplify and deduce the technical solution of the present invention, and to fully describe the technical solution, purpose and effect of the present invention. Its purpose is to enable the public to have a more thorough and comprehensive understanding of the disclosed content of the present invention, and it does not limit the scope of protection of the present invention.

[0086] The above embodiments are not exhaustive and may include many other embodiments not listed above. Any replacements and improvements made without violating the concept of the present invention are within the scope of protection of the present invention.

Claims

1. The elevator star-sealing function detection method is characterized by: Applied to an elevator electrical device, the elevator electrical device includes a frequency converter, a traction machine, a running contactor, and a star-sealing contactor, the three output terminals of the frequency converter are respectively connected to the three input terminals of the traction machine, the three contacts of the running contactor are correspondingly arranged between the frequency converter and the traction machine, the three contacts of the star-sealing contactor are correspondingly arranged between the running contactor and the traction machine, and resistors are respectively connected in parallel to the two ends of the three contacts of the running contactor; the method includes: Controlling the frequency converter to output a voltage pulse signal between any two target output terminals among its three output terminals; detecting a feedback current change signal formed on a current path between the two target output terminals; Determining a star-sealing function detection result between two input terminals connected to the two target output terminals on the traction machine according to the feedback current change signal; wherein the star-sealing function detection result is used to indicate whether the star-sealing function is normal or abnormal; Determining a star-sealing function detection result between two input terminals connected to the two target output terminals on the traction machine according to the feedback current change signal includes: Determining, based on the feedback current change signal, a duration during which the feedback current rises to a current peak; and determining whether the duration is less than a first preset threshold; If the duration is less than a first preset threshold, it is determined that the star-sealing function between the two input terminals connected to the two target output terminals on the traction machine is normal; If the duration is not less than a first preset threshold, it is determined that the star-sealing function between the two input terminals connected to the two target output terminals on the traction machine is abnormal.

2. The elevator star-sealing function detection method according to claim 1, characterized in that: A switch contactor is further provided between one end of the three contacts of the operating contactor and the resistor; Furthermore, before controlling the frequency converter to output a voltage pulse signal between any two target output terminals among its three output terminals, the method further includes: detecting whether the switch contactor is in a closed state; If the switch contactor is in a closed state, executing the step of controlling the frequency converter to output a voltage pulse signal between any two target output terminals among the three output terminals of the frequency converter; If the switch contactor is not in a closed state, control the switch contactor to close.

3. The elevator star-sealing function detection method according to claim 2, characterized in that: After determining a star-sealing function detection result between two input terminals connected to the two target output terminals on the traction machine according to the feedback current change signal, the method further includes: Controlling the switch contactor to disconnect; If the star sealing function detection result is used to indicate that the star sealing function is abnormal, a fault prompt message is output.

4. The elevator star-sealing function detection method according to claim 2, characterized in that: Detecting whether the switch contactor is in a closed state includes: When it is detected that the elevator stops running, the three contacts of the running contactor are controlled to be disconnected; When the action feedback signal of the star-sealing contactor is detected, it is detected whether the switch contactor is in a closed state.

5. The elevator star sealing function detection device is characterized by: Applicable to an elevator electrical device, the elevator electrical device includes a frequency converter, a traction machine, a running contactor and a star-sealing contactor, the three output terminals of the frequency converter are respectively connected to the three input terminals of the traction machine, the three contacts of the running contactor are correspondingly arranged between the frequency converter and the traction machine, the three contacts of the star-sealing contactor are correspondingly arranged between the running contactor and the traction machine, and resistors are respectively connected in parallel at both ends of the three contacts of the running contactor; the detection device includes: An output unit, used for controlling the frequency converter to output a voltage pulse signal between any two target output terminals among its three output terminals; a detection unit, configured to detect a feedback current change signal formed on a current path between the two target output terminals; A discrimination unit is used to determine, based on the feedback current change signal, a star-sealing function detection result between the two input terminals connected to the two target output terminals on the traction machine; wherein, the star-sealing function detection result is used to characterize whether the star-sealing function is normal or abnormal; determining, based on the feedback current change signal, a star-sealing function detection result between the two input terminals connected to the two target output terminals on the traction machine, including: determining, based on the feedback current change signal, a duration for the feedback current to rise to a current peak; determining whether the duration is less than a first preset threshold; if the duration is less than the first preset threshold, determining that the star-sealing function between the two input terminals connected to the two target output terminals on the traction machine is normal; if the duration is not less than the first preset threshold, determining that the star-sealing function between the two input terminals connected to the two target output terminals on the traction machine is abnormal.

6. The elevator star-sealing function detection device according to claim 5, characterized in that: A switch contactor is further provided between one end of the three contacts of the operating contactor and the resistor; the detection device further comprises a switch unit for detecting whether the switch contactor is in a closed state before the output unit controls the inverter to output a voltage pulse signal between any two target output terminals of the inverter's three output terminals; If the switch contactor is in a closed state, the output unit is triggered to execute the operation of controlling the inverter to output a voltage pulse signal between any two target output terminals among its three output terminals; if the switch contactor is not in a closed state, the switch contactor is controlled to be closed.

7. An electronic device, characterized in that The invention comprises a memory storing an executable program code and a processor coupled to the memory; the processor calls the executable program code stored in the memory to execute the elevator star sealing function detection method according to any one of claims 1 to 4.

8. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, wherein the computer program enables a computer to execute the elevator star-sealing function detection method according to any one of claims 1 to 4.

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