Elevator brake testing device and method

Abstract

The invention relates to the technical field of elevator brakes, and discloses an elevator brake testing device and method. The device comprises a test basic assembly, a static sensing assembly and a dynamic sensing assembly, the test basic assembly comprises a traction machine, a steel wire rope, a lift car, a counterweight and a brake; wherein the steel wire rope is assembled on the traction machine, the two ends of the steel wire rope are connected with the lift car and the counterweight respectively, and the brake is installed corresponding to the position of the traction machine; the static sensing assembly comprises a frequency converter, a torque sensor and a current sensor; the dynamic sensing assembly comprises a speed sensor, a first tension sensor, a second tension sensor and a weight sensor. According to the invention, the static and dynamic performance of the brake can be rapidly and accurately tested.

Description

Technical Field

[0001] The present application relates to the technical field of elevator brakes, and in particular to an elevator brake testing device and method. Background Art

[0002] The safety and comfort of elevators are the aspects that passengers can most easily feel intuitively. People's attention to elevators is also mainly focused on these two aspects, and the braking process of elevators is directly related to them. The performance of the brake directly affects the safety of the elevator. The performance test of the brake mainly includes two aspects: static and dynamic testing. Among them, the static test is to measure whether the brake can keep the car stationary when the elevator is stationary, and the dynamic test is to measure whether the brake can stop the car within a set distance. At present, during the static performance test, based on the existing test frame, in the simulation test process, it is necessary to continuously add loads to the car to simulate the brake performance under different load conditions, which is more troublesome to operate. In the dynamic performance test, how to achieve accurate measurement of the sliding distance is the focus of current attention. Summary of the invention

[0003] The purpose of the present application is to provide an elevator brake test device to solve the problem of inconvenient operation in static performance testing and accurate measurement of sliding distance in dynamic performance testing.

[0004] In order to achieve the above purpose, the technical solutions adopted are as follows:

[0005] In a first aspect, the present application provides an elevator brake test device, characterized in that it includes a test basic component, a static sensor component and a dynamic sensor component;

[0006] The basic test assembly includes a traction machine, a wire rope, a car, a counterweight and a brake; wherein the wire rope is mounted on the traction machine, the two ends of the wire rope are respectively connected to the car and the counterweight, and the brake is installed corresponding to the position of the traction machine;

[0007] The static sensing assembly includes a frequency converter, a torque sensor and a current sensor; wherein the frequency converter is connected to the traction machine and is used to control the output current of the traction machine, the torque sensor is used to detect the output torque of the traction machine, and the current sensor is used to detect the output current of the traction machine;

[0008] The dynamic sensing component includes a speed sensor, a first tension sensor, a second tension sensor and a weight sensor; wherein the speed sensor is arranged on the car to detect the speed of the car, the first tension sensor and the second tension sensor are both arranged on the wire rope to respectively detect the tension on the car side and the counterweight side, and the weight sensor is used to detect the weight of the counterweight.

[0009] Preferably, in the above elevator brake test device, a controller is further included, the controller is connected to the static sensor component signal, and the controller is configured as follows:

[0010] Obtain the output current and output torque of the traction machine when the elevator is running stably without load;

[0011] Determine the elevator balance coefficient based on the output torque of the traction machine when the elevator is running stably without load;

[0012] Based on the elevator balance coefficient, the output current of the traction machine when the elevator is running stably without load, and the elevator balance coefficient, calculate the output current of the traction machine under different load conditions of the elevator;

[0013] The frequency converter is controlled so that, when the brake is activated, the traction machine works according to the output current of the traction machine under different load conditions of the elevator, and the static performance of the brake is judged by judging whether the traction machine is rotating based on the output torque of the traction machine detected in real time by the torque sensor.

[0014] Preferably, in the above elevator brake test device, the controller is further configured to determine the elevator balance coefficient according to the output torque of the traction machine when the elevator is running stably without load by the following formula (1):

[0015]

[0016] In the formula, α represents the elevator balance coefficient, T 空载 It represents the output torque of the traction machine when the elevator is running stably without load, q 额 Indicates the rated load of the elevator.

[0017] Preferably, in the above elevator brake test device, the controller is further configured to calculate the output current of the traction machine under different load conditions of the elevator based on the elevator balance coefficient, the output current of the traction machine when the elevator is running stably without load, and the elevator balance coefficient by the following formula (2):

[0018]

[0019] In the formula, I i It represents the output current of the traction machine of the elevator under the i-th load condition, O i It represents the percentage of the elevator's i-th load condition, α represents the elevator balance coefficient, and I0 represents the output current of the traction machine when the elevator is running stably without load.

[0020] Preferably, in the above elevator brake test device, the controller is further configured to determine whether the traction machine is rotating according to the output torque of the traction machine detected in real time by the torque sensor by the following formula (3):

[0021]

[0022] Among them, T 实时 Indicates the output torque of the traction machine detected by the torque sensor in real time.

[0023] Preferably, in the above elevator brake test device, a controller is further included, the controller is connected to the dynamic sensor component signal, and the controller is configured as follows:

[0024] Acquire the first tension and the second tension detected by the first tension sensor and the second tension sensor, the weight of the counterweight detected by the weight sensor, and the car speed detected by the speed sensor;

[0025] Calculating a sliding determination coefficient according to the weight of the counterweight;

[0026] Comparing the ratio of the first tension to the second tension with the slip determination coefficient to determine whether there is slip between the traction machine and the wire rope, and recording the time when the slip between the traction machine and the wire rope begins when it is determined that there is slip between the traction machine and the wire rope;

[0027] Calculating a control response time based on the moment when the traction machine and the wire rope begin to slip and the moment when the brake is activated;

[0028] Calculating the first car travel distance based on the control response time and the car speed at the time when the brake is activated;

[0029] Calculating the running distance of the second car based on the car speed at the time when the brake is activated and the slip determination coefficient;

[0030] The sum of the running distance of the first car and the running distance of the second car is taken as the car sliding distance;

[0031] The car sliding distance is compared with a standard threshold to determine the dynamic performance of the brake.

[0032] Preferably, in the above elevator brake test device, the controller is further configured to calculate the slip determination coefficient according to the weight of the counterweight by the following formula (4):

[0033]

[0034] Wherein, β represents the slip determination coefficient, M1 represents the car mass, M2 represents the counterweight mass, and M'2 represents the weight of the counterweight detected by the weight sensor.

[0035] Preferably, in the above elevator brake test device, the controller is further configured to determine whether there is slippage between the traction machine and the wire rope by the following formula (5):

[0036]

[0037] Wherein, F1 represents the first tension, which is the tension of the wire rope on the car side, F2 represents the second tension, which is the tension of the wire rope on the counterweight side, and β represents the slip determination coefficient.

[0038] Preferably, in the above elevator brake test device, the controller is further configured to calculate the car sliding distance by the following formula:

[0039] t=t1-t2 (6)

[0040] In the formula, t represents the control response time, t1 represents the time when the traction machine and the wire rope begin to slip, and t2 represents the time when the brake is activated;

[0041]

[0042] Where S1 represents the running distance of the first car, v 测 It indicates the car speed when the brake is activated, and v indicates the rated operating speed;

[0043]

[0044] Where S2 represents the running distance of the first car, β represents the sliding determination coefficient, M1 represents the car mass, M2 represents the counterweight mass, μ represents the load factor, and q 额 It represents the rated load of the elevator and g represents the acceleration due to gravity.

[0045] S=S1+S2 (9)

[0046] Where S represents the sliding distance of the car.

[0047] In a second aspect, the present application provides an elevator brake test method, based on the elevator brake test device as described above, the method comprising:

[0048] Static performance testing, including:

[0049] Obtain the output current and output torque of the traction machine when the elevator is running stably without load;

[0050] Determine the elevator balance coefficient based on the output torque of the traction machine when the elevator is running stably without load;

[0051] Based on the elevator balance coefficient, the output current of the traction machine when the elevator is running stably without load, and the elevator balance coefficient, calculate the output current of the traction machine under different load conditions of the elevator;

[0052] Controlling the frequency converter, when the brake is activated, to make the traction machine work according to the output current of the traction machine under different load conditions of the elevator, and judging whether the traction machine is rotating according to the output torque of the traction machine detected in real time by the torque sensor, so as to judge the static performance of the brake;

[0053] Dynamic performance testing, including:

[0054] Obtain the output current and output torque of the traction machine when the elevator is running stably without load;

[0055] Determine the elevator balance coefficient based on the output torque of the traction machine when the elevator is running stably without load;

[0056] Based on the elevator balance coefficient, the output current of the traction machine when the elevator is running stably without load, and the elevator balance coefficient, calculate the output current of the traction machine under different load conditions of the elevator;

[0057] The frequency converter is controlled so that, when the brake is activated, the traction machine works according to the output current of the traction machine under different load conditions of the elevator, and the static performance of the brake is judged by judging whether the traction machine is rotating based on the output torque of the traction machine detected in real time by the torque sensor.

[0058] The beneficial effects of this application are:

[0059] The present application implements the tests of the static performance and dynamic performance of the brake respectively by designing a static sensor component and a dynamic sensor component. In the test of the static performance, the output current of the traction machine is adjusted by adding a frequency converter, thereby simulating different load conditions and improving the test efficiency of the static performance. In the test of the dynamic performance, the tension on both sides is determined, and combined with the weight change of the counterweight, it is determined whether there is slippage between the wire rope and the traction machine, and then the actual action time of the brake is determined. In this way, when calculating the sliding distance of the car by speed, the sliding of the car caused by the response time of the machine is taken into account, so that the sliding distance of the car can be accurately measured to ensure the accuracy of the dynamic performance test of the brake. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 A structural schematic diagram of an elevator brake testing device according to an embodiment of the present application is shown.

[0061] Figure 2 A basic structural diagram of an elevator according to the prior art is shown.

[0062] Figure 3 A flow chart of a static performance test of an elevator brake according to an embodiment of the present application is shown.

[0063] Figure 4 A flow chart of the dynamic performance test of an elevator brake according to an embodiment of the present application is shown.

[0064] Figure 5 A schematic diagram of electronic component connections in an elevator brake test device according to an embodiment of the present application is shown.

[0065] Reference numerals:

[0066] 1. Traction machine; 2. Wire rope; 3. Car; 4. Counterweight; 5. Brake; 6. Frequency converter; 7. Torque sensor; 8. Current sensor; 9. Speed ​​sensor; 10. First tension sensor; 11. Second tension sensor; 12. Weight sensor; 13. Controller. DETAILED DESCRIPTION

[0067] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0068] The specific implementation of the present application is further described in detail below in conjunction with the drawings and examples.

[0069] The present application embodiment provides an elevator brake test device, such as Figure 1As shown, the elevator brake test device includes a test basic component, a static sensor component and a dynamic sensor component; the test basic component includes a traction machine 1, a wire rope 2, a car 3, a counterweight 4 and a brake 5; wherein the wire rope 2 is mounted on the traction machine 1, and the two ends of the wire rope 2 are respectively connected to the car 3 and the counterweight 4, and the brake 5 is installed corresponding to the position of the traction machine 1; the static sensor component includes a frequency converter 6, a torque sensor 7 and a current sensor 8; wherein the frequency converter 6 is connected to the traction machine 1 and is used to control the output current of the traction machine 1. The torque sensor 7 is used to detect the output torque of the traction machine 1, and the current sensor 8 is used to detect the output current of the traction machine 1; the dynamic sensing component includes a speed sensor 9, a first tension sensor 10, a second tension sensor 11 and a weight sensor 12; wherein the speed sensor 9 is arranged in the car 3 for detecting the speed of the car 3, the first tension sensor 10 and the second tension sensor 11 are both arranged on the wire rope 2 for respectively detecting the tension on the car side and the counterweight side, and the weight sensor 12 is used to detect the weight of the counterweight 4.

[0070] It should be noted that the basic test components mentioned in this article are a test framework built according to the actual elevator model to be measured. This embodiment only describes the core components involved in the test framework. In the specific implementation, this test framework also includes a frame for installing the traction machine 1 and the brake 5 and a guide rail structure matching the car 3 and the counterweight 4. For example, you can refer to Figure 2 An existing elevator structure is shown in the layout.

[0071] In this embodiment, static and dynamic performance tests of the brake are implemented respectively by designing a static sensor component and a dynamic sensor component. In the static performance test, the output current of the traction machine 1 is adjusted by adding a frequency converter 6, thereby simulating different load conditions and improving the test efficiency of the static performance. In the dynamic performance test, the tension on both sides is determined, and combined with the weight change of the counterweight, it is determined whether there is slippage between the wire rope 2 and the traction machine 1, and then the actual action time of the brake is determined. In this way, when calculating the car sliding distance by speed, the car sliding caused by the machine response time is taken into account, and the car sliding distance can be accurately measured to ensure the accuracy of the brake dynamic performance test.

[0072] The embodiment of the present invention also provides an elevator brake test method, which is based on Figure 1 The elevator brake test device shown in FIG. 1 utilizes a static sensor component and a dynamic sensor component to implement a static performance test and a dynamic performance test of the brake. The process of the static performance test and the dynamic performance test is as follows: Figure 3 and Figure 4 shown.

[0073] In an exemplary embodiment, the elevator brake test device may further include a controller 13, the controller 13 is signal-connected to both the static sensor component and the dynamic sensor component, and the connection method is as follows: Figure 5 As shown, Figure 5 The arrow in the middle shows the transmission direction of the signal. The controller 13 is configured to execute the elevator brake test method, so that the static performance test and the dynamic performance test of the brake can be automatically implemented based on the controller 13.

[0074] Please combine Figure 3 As shown, the static performance test of the brake is implemented under the control of the controller 13. The controller 13 is used to obtain various signals detected by the static sensor component, calculate the output current of the traction machine 1 under different load conditions, and control the output current of the traction machine 1 based on the inverter 6 to simulate different load conditions and determine whether the static performance of the brake meets the design standards.

[0075] Specifically, the controller 13 is configured to execute steps S301 to S304, which are described in detail as follows.

[0076] S301, obtaining the output current and output torque of the traction machine when the elevator is running stably without load.

[0077] S302, determining the elevator balance coefficient according to the output torque of the traction machine when the elevator is running stably without load.

[0078] In some embodiments, the elevator balance coefficient is determined by the following formula (1):

[0079]

[0080] In the formula, α represents the elevator balance coefficient, T 空载 It represents the output torque of the traction machine when the elevator is running stably without load, q 额 Indicates the rated load of the elevator.

[0081] S303, calculating the output current of the traction machine under different load conditions of the elevator based on the elevator balance coefficient, the output current of the traction machine when the elevator is running stably without load, and the elevator balance coefficient.

[0082] In some embodiments, the output current of the traction machine under different load conditions of the elevator is calculated by the following formula (2):

[0083]

[0084] In the formula, I i It represents the output current of the traction machine of the elevator under the i-th load condition, O iIt represents the percentage of the elevator's i-th load condition, α represents the elevator balance coefficient, and I0 represents the output current of the traction machine when the elevator is running stably without load.

[0085] S304, controlling the frequency converter, when the brake is activated, makes the traction machine work according to the output current of the traction machine under different load conditions of the elevator, and judges whether the traction machine is rotating according to the output torque of the traction machine detected in real time by the torque sensor, so as to judge the static performance of the brake.

[0086] In some embodiments, whether the traction machine is rotating is determined by the following formula (3):

[0087]

[0088] Among them, T 实时 Indicates the output torque of the traction machine detected by the torque sensor in real time.

[0089] Please combine Figure 4 As shown, the dynamic performance test of the brake is implemented under the control of the controller 13. The controller 13 is used to obtain various signals detected by the dynamic sensor components, calculate the car sliding distance while considering the response time of the brake, and judge whether the dynamic performance of the brake meets the standard based on the car sliding distance specified by the industry standard (i.e., the standard threshold).

[0090] Specifically, the controller 13 is configured to execute steps S401 to S408, which are described in detail as follows.

[0091] S401, obtaining a first tension detected by a first tension sensor and a second tension sensor, a weight of a counterweight detected by a weight sensor, and a car speed detected by a speed sensor.

[0092] S402, calculating the sliding determination coefficient according to the weight of the counterweight.

[0093] In some embodiments, the sliding determination coefficient is calculated according to the weight of the counterweight by the following formula (4):

[0094]

[0095] Wherein, β represents the slip determination coefficient, M1 represents the car mass, M2 represents the counterweight mass, and M'2 represents the weight of the counterweight detected by the weight sensor.

[0096] S403, comparing the ratio of the first tension to the second tension with the slip determination coefficient to determine whether there is slip between the traction machine and the wire rope, and if it is determined that there is slip between the traction machine and the wire rope, recording the time when the slip between the traction machine and the wire rope begins.

[0097] In some embodiments, whether there is slippage between the traction machine and the wire rope is determined by the following formula (5):

[0098]

[0099] Wherein, F1 represents the first tension, which is the tension of the wire rope on the car side, F2 represents the second tension, which is the tension of the wire rope on the counterweight side, and β represents the slip determination coefficient.

[0100] S404, calculating the control response time based on the time when the traction machine and the wire rope begin to slip and the time when the brake is activated.

[0101] In some embodiments, based on the moment when the traction machine and the wire rope begin to slip and the moment when the brake is activated, the control response time is calculated by the following formula (6):

[0102] t=t1-t2 (6)

[0103] Where, t represents the control response time, t1 represents the moment when the traction machine and the wire rope begin to slip, and t2 represents the moment when the brake is activated.

[0104] S405, calculating the running distance of the first car based on the control response time and the car speed at the time when the brake is activated.

[0105] In some embodiments, based on the control response time and the car speed at the time of brake activation, the first car running distance is calculated by the following formula (7):

[0106]

[0107] Where S1 represents the running distance of the first car, v 测 It indicates the car speed when the brake is activated, and v indicates the rated operating speed;

[0108] S406, calculating the running distance of the second car based on the car speed at the time of brake activation and the slip determination coefficient.

[0109] In some embodiments, based on the car speed at the time of brake activation and the slip determination coefficient, the second car running distance is calculated by the following formula (8):

[0110]

[0111] Where S2 represents the running distance of the first car, β represents the sliding determination coefficient, M1 represents the car mass, M2 represents the counterweight mass, μ represents the load factor, and q 额 It represents the rated load of the elevator and g represents the acceleration due to gravity.

[0112] S407, taking the sum of the first car running distance and the second car running distance as the car sliding distance.

[0113] In some embodiments, the car sliding distance is calculated by the following formula (9):

[0114] S=S1+S2 (9)

[0115] Where S represents the sliding distance of the car.

[0116] S408, comparing the car sliding distance with a standard threshold to determine the dynamic performance of the brake.

[0117] The above implementation modes are only used to illustrate the present application, and are not intended to limit the present application. Ordinary technicians in the relevant technical field may make various changes and modifications without departing from the spirit and scope of the present application. Therefore, all equivalent technical solutions also belong to the scope of the present application, and the scope of patent protection of the present application shall be limited by the claims.

Claims

1. An elevator brake test device, characterized in that: Including testing basic components, static sensing components and dynamic sensing components; The basic test assembly includes a traction machine, a wire rope, a car, a counterweight and a brake; wherein the wire rope is mounted on the traction machine, the two ends of the wire rope are respectively connected to the car and the counterweight, and the brake is installed corresponding to the position of the traction machine; The static sensing assembly includes a frequency converter, a torque sensor and a current sensor; wherein the frequency converter is connected to the traction machine and is used to control the output current of the traction machine, the torque sensor is used to detect the output torque of the traction machine, and the current sensor is used to detect the output current of the traction machine; The dynamic sensing component includes a speed sensor, a first tension sensor, a second tension sensor and a weight sensor; wherein the speed sensor is arranged on the car to detect the speed of the car, the first tension sensor and the second tension sensor are both arranged on the wire rope to respectively detect the tension on the car side and the counterweight side, and the weight sensor is used to detect the weight of the counterweight.

2. The elevator brake test device according to claim 1, characterized in that: The invention also includes a controller, the controller being connected to the static sensing assembly by signal, the controller being configured to: Obtain the output current and output torque of the traction machine when the elevator is running stably without load; Determine the elevator balance coefficient based on the output torque of the traction machine when the elevator is running stably without load; Based on the elevator balance coefficient, the output current of the traction machine when the elevator is running stably without load, and the elevator balance coefficient, calculate the output current of the traction machine under different load conditions of the elevator; The frequency converter is controlled so that, when the brake is activated, the traction machine works according to the output current of the traction machine under different load conditions of the elevator, and the static performance of the brake is judged by judging whether the traction machine is rotating based on the output torque of the traction machine detected in real time by the torque sensor.

3. The elevator brake test device according to claim 2, characterized in that: The controller is further configured to determine the elevator balance coefficient according to the output torque of the traction machine when the elevator is running stably without load by the following formula (1): In the formula, α represents the elevator balance coefficient, T 空载 It represents the output torque of the traction machine when the elevator is running stably without load, q 额 Indicates the rated load of the elevator.

4. The elevator brake test device according to claim 2, characterized in that: The controller is further configured to calculate the output current of the traction machine under different load conditions of the elevator by the following formula (2) based on the elevator balance coefficient, the output current of the traction machine when the elevator is running stably without load, and the elevator balance coefficient: In the formula, I i It represents the output current of the traction machine of the elevator under the i-th load condition, O i It represents the percentage of the elevator's i-th load condition, α represents the elevator balance coefficient, and i0 represents the output current of the traction machine when the elevator is running stably without load.

5. The elevator brake test device according to claim 2, characterized in that: The controller is further configured to determine whether the traction machine is rotating according to the output torque of the traction machine detected in real time by the torque sensor by using the following formula (3): Among them, T 实时 Indicates the output torque of the traction machine detected by the torque sensor in real time.

6. The elevator brake test device according to claim 1, characterized in that: The invention also includes a controller, the controller is connected to the dynamic sensing component signal, and the controller is configured to: Acquire the first tension and the second tension detected by the first tension sensor and the second tension sensor, the weight of the counterweight detected by the weight sensor, and the car speed detected by the speed sensor; Calculating a sliding determination coefficient according to the weight of the counterweight; Comparing the ratio of the first tension to the second tension with the slip determination coefficient to determine whether there is slip between the traction machine and the wire rope, and recording the time when the slip between the traction machine and the wire rope begins when it is determined that there is slip between the traction machine and the wire rope; Calculating a control response time based on the moment when the traction machine and the wire rope begin to slip and the moment when the brake is activated; Calculating the first car travel distance based on the control response time and the car speed at the time when the brake is activated; Calculating the running distance of the second car based on the car speed at the time when the brake is activated and the slip determination coefficient; The sum of the running distance of the first car and the running distance of the second car is taken as the car sliding distance; The car sliding distance is compared with a standard threshold to determine the dynamic performance of the brake.

7. The elevator brake test device according to claim 6, characterized in that: The controller is further configured to calculate the slip determination coefficient according to the weight of the counterweight by the following formula (4): Wherein, β represents the slip determination coefficient, M1 represents the car mass, M2 represents the counterweight mass, and M'2 represents the weight of the counterweight detected by the weight sensor.

8. The elevator brake test device according to claim 6, characterized in that: The controller is further configured to determine whether there is slippage between the traction machine and the wire rope by using the following formula (5): Wherein, F1 represents the first tension, which is the tension of the wire rope on the car side, F2 represents the second tension, which is the tension of the wire rope on the counterweight side, and β represents the slip determination coefficient.

9. The elevator brake test device according to claim 6, characterized in that: The controller is further configured to calculate the car sliding distance by the following formula: t=t1-t2 (6) In the formula, t represents the control response time, t1 represents the time when the traction machine and the wire rope begin to slip, and t2 represents the time when the brake is activated; Where S1 represents the running distance of the first car, v 测 It indicates the car speed when the brake is activated, and v indicates the rated operating speed; Where S2 represents the running distance of the first car, β represents the sliding determination coefficient, M1 represents the car mass, M2 represents the counterweight mass, μ represents the load factor, and q 额 It represents the rated load of the elevator and g represents the acceleration due to gravity. S=S1+S2 (9) In the formula, S represents the sliding distance of the car.

10. An elevator brake test method, characterized in that: Based on the elevator brake test device according to claim 1, the method comprises: Static performance testing, including: Obtain the output current and output torque of the traction machine when the elevator is running stably without load; Determine the elevator balance coefficient based on the output torque of the traction machine when the elevator is running stably without load; Based on the elevator balance coefficient, the output current of the traction machine when the elevator is running stably without load, and the elevator balance coefficient, calculate the output current of the traction machine under different load conditions of the elevator; Controlling the frequency converter, when the brake is activated, to make the traction machine work according to the output current of the traction machine under different load conditions of the elevator, and judging whether the traction machine is rotating according to the output torque of the traction machine detected in real time by the torque sensor, so as to judge the static performance of the brake; Dynamic performance testing, including: Obtain the output current and output torque of the traction machine when the elevator is running stably without load; Determine the elevator balance coefficient based on the output torque of the traction machine when the elevator is running stably without load; Based on the elevator balance coefficient, the output current of the traction machine when the elevator is running stably without load, and the elevator balance coefficient, calculate the output current of the traction machine under different load conditions of the elevator; The frequency converter is controlled so that, when the brake is activated, the traction machine works according to the output current of the traction machine under different load conditions of the elevator, and the static performance of the brake is judged by judging whether the traction machine is rotating based on the output torque of the traction machine detected in real time by the torque sensor.

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