Electromagnetic lock running-in and friction torque automatic test system and method

Abstract

The invention discloses an electromagnetic lock running-in and friction torque automatic test system and method, and relates to the field of electromagnetic lock testing, and the system comprises a test bench which comprises a fixed base, an electromagnetic lock, a first coupling, a torque and rotating speed sensor, a second coupling and a servo motor. An electromagnetic lock fixing assembly and a servo motor fixing assembly are fixed on the fixed base, a stator part of the servo motor is fixedly connected to the servo motor fixing assembly, and a stator part of the electromagnetic lock is fixedly connected to the electromagnetic lock fixing assembly; a rotor part of the electromagnetic lock is fixedly connected with the torque and rotating speed sensor through a first coupler, and the torque and rotating speed sensor is fixedly connected with an output shaft of the servo motor through a second coupler. The problem that an existing electromagnetic lock friction torque testing system cannot meet the requirements for accuracy and efficiency of electromagnetic lock friction torque measurement is solved.

Description

Technical Field

[0001] The present invention relates to a testing system and method, and in particular to an electromagnetic lock running-in and friction torque automatic testing system and method, belonging to the electromagnetic lock testing technical field. Background Art

[0002] Electromagnetic lock (also known as electromagnetic brake) is a brake that realizes the locking and unlocking functions by turning on and off the power. Electromagnetic locks can be divided into electromagnetic electromagnetic locks and permanent magnet electromagnetic locks according to different working modes. Electromagnetic electromagnetic locks have a working mode of locking when the power is on and unlocking when the power is off; permanent magnet electromagnetic locks have a working mode of unlocking when the power is on and locking when the power is off.

[0003] Electromagnetic lock products are key components for achieving locking functions. For electromagnetic locks, the friction torque generated by the electromagnetic lock when locked is an important indicator to measure the performance of the electromagnetic lock, so it is very important to accurately and efficiently measure the friction torque of the electromagnetic lock.

[0004] Among the patents related to "electromagnetic lock braking performance" that can be retrieved, Beijing Experimental Factory Co., Ltd. has a patent: an electromagnetic lock braking performance environmental reliability verification device (patent number CN109342041A, CN109342041B). This patent mainly tests the braking reliability of the electromagnetic lock in the external environment, and cannot measure the specific value of the electromagnetic lock braking performance.

[0005] Among the patents related to "brake friction torque" that can be retrieved, Jinan University has a patent: A method for testing the friction torque of an elevator brake (patent numbers CN106829681A, CN106829681B). This patent mainly provides a method for testing the friction torque of an elevator brake. This test method needs to be performed on the elevator and cannot measure the friction torque of the brake alone.

[0006] Among the patents related to "brake performance" that can be retrieved, Hanfu Industrial Equipment (Jinan) Co., Ltd. has a patent: a brake performance test device (patent number CN118347715A, CN118347715B). This patent mainly controls the telescopic length of the telescopic cylinder by observing whether the motor shaft rotates, measures the maximum pressure value and the length of the support rod, and calculates the friction torque. The device has a complex structure and poor test accuracy.

[0007] Beijing Precision Electromechanical Control Equipment Research Institute has applied for a similar patent: a brake performance test device and test method (patent number CN109163839A, CN109163839B). This patent estimates the dynamic friction torque by controlling and collecting motor frequency and current parameters, and measures the static braking torque by a torque wrench. The device does not have a data acquisition function and requires manual data recording and calculation. The device has poor test accuracy, low test efficiency, and is not easy to use. Summary of the invention

[0008] The technical problem solved by the present application is to overcome the shortcomings of the prior art and provide an electromagnetic lock running-in and friction torque automatic test system and method, so as to achieve the purpose of automatic testing, accurate test results, high test efficiency and wide test range. The problem that the existing electromagnetic lock friction torque test system can no longer meet the accuracy and efficiency requirements of electromagnetic lock friction torque measurement is solved.

[0009] The technical solutions provided by this application are as follows:

[0010] An electromagnetic lock running-in and friction torque automatic test system comprises a test bench, wherein the test bench comprises a fixed base, an electromagnetic lock, a first coupling, a torque and speed sensor, a second coupling and a servo motor; an electromagnetic lock fixing assembly and a servo motor fixing assembly are fixed on the fixed base, a stator part of the servo motor is fixedly connected to the servo motor fixing assembly, and a stator part of the electromagnetic lock is fixedly connected to the electromagnetic lock fixing assembly; a rotor part of the electromagnetic lock is connected and fixed to the torque and speed sensor via a first coupling, and the torque and speed sensor is connected and fixed to an output shaft of the servo motor via a second coupling.

[0011] It also includes a measurement and control unit, which includes a power supply, a data acquisition module, a servo motor controller and an industrial control computer. The power supply is used to power the electromagnetic lock; the data acquisition module is used to collect detection data of the torque and speed sensor; the servo motor controller is used to control the servo motor; the industrial control computer controls whether the power supply supplies power to the electromagnetic lock, whether the data acquisition module collects data from the torque and speed sensor, controls the start and stop and speed of the servo motor, and processes the detection data through test software.

[0012] A crimping box is installed on the test bench, and the power supply leads the positive and negative terminals to the crimping box through cables, and the lead-out wires of the electromagnetic lock can be directly fixed on the crimping box.

[0013] The electromagnetic lock can be divided into a permanent magnet electromagnetic lock and an electromagnetic electromagnetic lock. The permanent magnet electromagnetic lock is locked when power is off, and the electromagnetic electromagnetic lock is locked when power is on. The electromagnetic lock is locked by powering on or off the power supply.

[0014] One of the measurement and control units is used in conjunction with one or more test benches.

[0015] A method for automatically testing the running-in and friction torque of an electromagnetic lock, using any of the above-mentioned automatic testing systems for running-in and friction torque of an electromagnetic lock for measurement, comprising:

[0016] First, run-in the electromagnetic lock, and then check the running-in surface;

[0017] If the running-in surface is qualified, the electromagnetic lock dynamic friction torque test or the electromagnetic lock static friction torque test is carried out; if the running-in surface is unqualified, the electromagnetic lock is run-in again until the running-in surface is qualified, and then the electromagnetic lock dynamic friction torque test or the electromagnetic lock static friction torque test is carried out.

[0018] The electromagnetic lock running-in comprises: starting the servo motor to drive the electromagnetic lock to rotate, and at the same time intermittently energizing and de-energizing the electromagnetic lock through the power supply, and checking the running-in surface condition after running-in for a set time;

[0019] The running-in surface is the mating surface between the rotor and the stator. When the wear marks on the running-in surface are uniform, the running-in surface is considered qualified.

[0020] The electromagnetic lock dynamic friction torque test includes:

[0021] According to the type of electromagnetic lock, the power supply / power-on state of the power supply is controlled to put the electromagnetic lock into a locked state;

[0022] The servo motor drives the torque speed sensor and the electromagnetic lock to rotate at a constant speed according to the set speed;

[0023] The data acquisition module reads the torque value fed back by the torque speed sensor, and feeds the torque value back to the industrial control computer. The industrial control computer draws a dynamic friction torque curve according to the torque value and obtains the dynamic friction torque.

[0024] The electromagnetic lock static friction torque test includes:

[0025] S1: According to the type of electromagnetic lock, control the power supply / power-on state of the power supply to make the electromagnetic lock in a locked state;

[0026] S2: The electromagnetic lock under test is in a stationary state, and the servo motor slowly increases the current until the servo motor drives the electromagnetic lock to a critical state between rotation and stationary state. At this time, the maximum torque value measured by the torque and speed sensor is the static friction torque of the electromagnetic lock. The data acquisition module reads all the measurement data fed back by the torque and speed sensor, and feeds the measurement data back to the industrial control computer. The industrial control computer determines the maximum torque value from all the measurement data as the friction torque T1 in this state.

[0027] S2: Continue to increase the current, so that the servo motor drives the electromagnetic lock to rotate to the next set angle, and then reduce the current to stop the electromagnetic lock from rotating;

[0028] S3: Repeat the above steps S1 and S2 to implement a multi-point test of the static friction torque of the electromagnetic lock at 360°, and obtain the friction torque T1 of multiple measurement points;

[0029] S4: After the 360° test is completed, the friction torque T1 obtained from all test points is averaged after being processed by an industrial control computer as the static friction torque of the electromagnetic lock.

[0030] Compared with the prior art, the present invention has at least the following beneficial effects:

[0031] (1) The present invention can be installed once to complete electromagnetic lock running-in, dynamic friction torque and static friction torque tests without disassembly of the system, thus simplifying the test steps.

[0032] (2) The present invention uses a high-precision torque and speed sensor 5 to replace a torque wrench for testing, which has low requirements on operators, high testing efficiency, and more accurate testing.

[0033] (3) The present invention adopts a modular design, and can meet the test requirements of different electromagnetic locks 3 by replacing the torque speed sensor 5 and the servo motor 7. A set of measurement and control units 2 can also be used in conjunction with multiple test benches 1, ensuring high measurement accuracy while ensuring a wide measurement range, achieving a test error of <0.005Nm when testing 0-10Nm; and a test error of <0.025Nm when testing 10-50Nm.

[0034] (4) A wire crimping box is installed on the test bench 1, and the power supply 8 leads the positive and negative terminals to the wire crimping box through cables. The lead wires of the electromagnetic lock 3 can be directly fixed on the wire crimping box, which is convenient to install and simple to operate.

[0035] (5) The servo motor controller 10 is connected to the servo motor 7 via a cable to realize closed-loop control of the motor. During the static friction torque test, it can be measured once for each fixed angle, such as 5°, 10°, 15°, 20°, etc., and up to 360 points can be tested in one circle. High-precision testing of the dynamic friction torque of the electromagnetic lock can be realized, and the sampling frequency can reach 200Hz. Dynamic and static friction torque tests at any speed and number of circles from 1 to 1000rpm can be realized.

[0036] (6) The present invention designs a special test software 12 to collect and control data of the power supply 8, the data acquisition module 9, and the servo motor controller 10. The friction torque value can be displayed in real time and relevant statistical calculations can be performed and curves can be drawn. The curve of the friction torque changing with time, phase, and speed is obtained, which is more conducive to the study of the friction torque of the electromagnetic lock.

[0037] (7) The electromagnetic lock is powered on or off through the power supply 8 to achieve locking of the electromagnetic lock. This patent can realize the friction torque test of permanent magnet electromagnetic lock and electromagnetic electromagnetic lock.

[0038] (8) The present invention can be installed once and complete various tests such as electromagnetic lock running-in, dynamic friction torque and static friction torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A schematic diagram of a system in an embodiment of the present invention;

[0040] Figure 2 A three-dimensional schematic diagram of an embodiment of the present invention;

[0041] Figure 3 A schematic diagram of a test bench in an embodiment of the present invention;

[0042] Figure 4 This is a schematic diagram of a measurement and control unit in an embodiment of the present invention;

[0043] Figure 5 This is a flow chart of electromagnetic lock testing in an embodiment of the present invention;

[0044] Figure 6 This is a schematic diagram of the static friction torque test principle of the electromagnetic lock in an embodiment of the present invention. DETAILED DESCRIPTION

[0045] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments disclosed in the present invention will be further described in detail below with reference to the accompanying drawings.

[0046] The present application embodiment discloses an electromagnetic lock running-in and friction torque automatic testing system, such as Figure 1 , Figure 2 As shown, the present invention comprises two major parts: a test bench 1 and a measurement and control unit 2.

[0047] like Figure 3 As shown, the test bench 1 includes an electromagnetic lock 3, a coupling 1 4, a torque and speed sensor 5, a coupling 2 6, a servo motor 7, an electromagnetic lock fixing component 13, a servo motor fixing component 14, and a fixing base 15.

[0048] The rotor part of the electromagnetic lock 3 is connected and fixed to the torque speed sensor 5 through the coupling 1 4; the torque speed sensor 5 is connected and fixed to the output shaft of the servo motor 7 through the coupling 2 6. The stator part of the electromagnetic lock 3 is fixed to the electromagnetic lock fixing component 13 through screws, and the stator part of the servo motor 7 is fixed to the servo motor fixing component 14 through screws. The electromagnetic lock fixing component 13 and the servo motor fixing component 14 are fixed to the fixing base 15.

[0049] In order to ensure that the electromagnetic lock 3, the torque speed sensor 5 and the servo motor 7 are coaxial, the electromagnetic lock fixing assembly 13, the servo motor fixing assembly 14 and the fixing base 15 must ensure high processing accuracy; the servo motor 7 and the servo motor fixing assembly 14 are limited by a stopper. The electromagnetic lock fixing assembly 13, the servo motor fixing assembly 14 and the fixing base 15 are limited by a key.

[0050] The present invention uses a torque and speed sensor 5 to measure torque and speed, so the accuracy of the torque and speed sensor 5 will directly affect the test accuracy of the friction torque. The test accuracy is usually contradictory to the test range. A wide test range will relatively reduce the test accuracy. The present invention adopts a modular design, and a measurement and control unit 2 can be used in conjunction with multiple test benches 1. While the measurement range is wide, high measurement accuracy is guaranteed, and the test error is less than 0.005Nm when the test is 0-10Nm; when the test range is 10-50Nm, the test error is less than 0.025Nm.

[0051] like Figure 4 As shown, the measurement and control unit 2 includes a power supply 8, a data acquisition module 9, a servo motor controller 10, and an industrial control computer 11. The industrial control computer 11 contains a test software 12.

[0052] The power supply 8 is used to supply power to the electromagnetic lock 3; the data acquisition module 9 is used to collect the detection data of the torque and speed sensor 5; the servo motor controller 10 is used to control the servo motor 7; the industrial control computer 11 controls whether the power supply 8 supplies power to the electromagnetic lock 3, whether the data acquisition module 9 collects data from the torque and speed sensor 5, controls whether the servo motor 7 is started and the speed through the test software 12, and processes the detection data.

[0053] The servo motor controller 10 is connected to the servo motor 7 via a cable to realize closed-loop control of the motor. During the static friction torque test, it can be measured once for each fixed angle, such as 5°, 10°, 15°, 20°, etc., and up to 360 points can be tested in one circle. High-precision testing of the dynamic friction torque of the electromagnetic lock can be achieved, and the sampling frequency can reach 200Hz. Dynamic and static friction torque tests at any speed and number of circles from 1 to 1000rpm can be achieved.

[0054] A crimping box is installed on the test bench 1, and the power supply 8 leads the positive and negative terminals to the crimping box through cables. The lead wires of the electromagnetic lock 3 can be directly fixed on the crimping box, which is convenient to install and simple to operate.

[0055] The present invention designs a special test software 12 to collect and control data of the power supply 8, the data acquisition module 9, and the servo motor controller 10. The friction torque value can be displayed in real time, and relevant statistical calculations can be performed and curves can be drawn. The change curve of the friction torque with time, phase, and speed is obtained, which is more conducive to the study of the friction torque of the electromagnetic lock.

[0056] The electromagnetic lock 3 should be run-in before the friction torque test to ensure the stability of the performance of the electromagnetic lock 3. The system contains a programmable power supply 8, and the parameters of the power supply 8 can be directly set in the test software 12. The electromagnetic lock 3 is intermittently powered on and off by the power supply 8 to realize the electromagnetic lock running-in function. The number of running-in times can be set in the test software 12 to simplify the operation.

[0057] The electromagnetic lock 3 can be divided into a permanent magnet electromagnetic lock and an electromagnetic electromagnetic lock. The permanent magnet electromagnetic lock is locked when power is not supplied, and the electromagnetic electromagnetic lock is locked when power is supplied. The electromagnetic lock is powered on or off by the power supply 8 to achieve locking of the electromagnetic lock. This patent can realize the friction torque test of the permanent magnet electromagnetic lock and the electromagnetic electromagnetic lock.

[0058] The test software 12 adopts a modular design, mainly including modules such as system login, function test, account management, system setting, data retention and readback. The relevant parameters can be set and adjusted according to the electromagnetic lock 3 of different specifications. Finally, the running-in, dynamic friction torque test and static friction torque test of the electromagnetic lock 3 are realized.

[0059] The present invention can be installed once and complete various tests such as electromagnetic lock running-in, dynamic friction torque, static friction torque and the like.

[0060] like Figure 5 As shown, the present invention proposes an automatic test process for the running-in, dynamic friction torque and static friction torque of the electromagnetic lock 3, which is as follows: when working, first set the parameters, start the servo motor 7 according to the parameter setting requirements to drive the electromagnetic lock 3 to rotate to achieve automatic running-in, and at the same time, the power supply 8 intermittently powers on and off the electromagnetic lock. After the running-in is completed, check the running-in surface condition, the running-in surface is the matching surface of the rotor and the stator, and when the wear marks on the running-in surface are uniform, it is considered that the running-in surface is qualified; if the running-in surface is qualified, the dynamic friction torque test and the static friction torque test of the electromagnetic lock 3 are performed; if the running-in surface is unqualified, the electromagnetic lock running-in test is performed again until the running-in surface is qualified, and then the dynamic friction torque test and the static friction torque test of the electromagnetic lock 3 are performed.

[0061] The present invention proposes an automatic test method for electromagnetic lock running-in and dynamic friction torque test. During automatic running-in, the servo motor 7 drives the electromagnetic lock 3 to rotate at a set speed through a coupling for running-in. During the dynamic friction torque test, according to the type of the electromagnetic lock 3, the power supply / power-on state of the power supply 8 is controlled to make the electromagnetic lock 3 in a locked state. After that, the servo motor 7 drives the torque speed sensor 5 and the electromagnetic lock 3 to rotate at a set speed. The data acquisition module 9 reads the torque value fed back by the torque speed sensor 5, which is the dynamic friction torque of the electromagnetic lock. After being processed by the industrial control computer 11 and the test software 12, the dynamic friction torque is obtained and the dynamic friction torque curve is drawn.

[0062] Static friction torque refers to the torque that hinders relative motion when the electromagnetic locked rotors have a tendency to move relative to each other but do not move relative to each other. Figure 6 As shown, the present invention proposes a test method for static friction torque: S1: During operation, according to the type of electromagnetic lock 3, the power supply / power-on state of the power supply 8 is controlled to make the electromagnetic lock 3 locked; S2: The electromagnetic lock 3 to be tested is in a stationary state, and the servo motor 7 slowly increases the current until the servo motor 7 drives the electromagnetic lock 3 to be in a critical state of rotation and stationary. At this time, the maximum torque value measured by the torque speed sensor 5 is the static friction torque of the electromagnetic lock. All measurement data are processed by the industrial control computer 11 and the test software 12 (find the maximum torque value in all measurement data) to obtain the friction torque T1 in this state. S3: After that, continue to increase the current, so that the servo motor 7 drives the electromagnetic lock 3 to rotate to the next set angle, and then reduce the current to stop the electromagnetic lock from rotating. S4: Repeat the above steps S2 and S3 to achieve a multi-point test of the static friction torque of the electromagnetic lock 3 at 360°. S5: After one week of testing, after processing by the industrial control computer 11 and the test software 12, the torque of all test points is averaged Tav as the static friction torque of the electromagnetic lock 3.

[0063] The main innovative features of the present invention are as follows:

[0064] (1) The present invention is based on the torque speed sensor for testing, and the two ends of the sensor are axially connected to the motor and the electromagnetic lock through a coupling. A motor controller, a power supply, and an industrial computer are used for closed-loop control, and finally the electromagnetic lock can be automatically run-in, and dynamic friction torque and static friction torque can be automatically tested.

[0065] (2) The present invention proposes an electromagnetic lock running-in and dynamic friction torque automatic test method: During automatic running-in, the servo motor drives the electromagnetic lock to rotate at a constant speed according to the set speed through the coupling for running-in. During the dynamic friction torque test, the servo motor drives the torque speed sensor and the electromagnetic lock to rotate at a constant speed according to the set speed, and the test system automatically reads the torque value fed back by the torque speed sensor, which is the dynamic friction torque of the electromagnetic lock. After processing by the industrial control computer and the test software, the dynamic friction torque is obtained and the dynamic friction torque curve is drawn.

[0066] (3) The present invention proposes a method for testing the static friction torque of an electromagnetic lock: the electromagnetic lock to be tested is in a stationary state, and the servo motor slowly increases the current until the servo motor drives the electromagnetic lock to a critical state between rotation and stationary. At this time, the maximum torque value measured by the torque speed sensor is the static friction torque of the electromagnetic lock. After being processed by an industrial control computer and test software, the friction torque T1 in this state is obtained. After that, the current is continued to be increased so that the servo motor drives the electromagnetic lock to rotate to the next set angle, and then the current is reduced to stop the electromagnetic lock from rotating. Repeat the above steps to achieve a multi-point test of the static friction torque of the electromagnetic lock at 360°. After one week of testing, after being processed by an industrial control computer and test software, the torque of all test points is averaged to Tav, which is used as the static friction torque of the electromagnetic lock.

[0067] (4) The present invention proposes an automatic test process for electromagnetic lock running-in, dynamic friction torque and static friction torque, which is as follows: when working, first set the parameters, start the servo motor to drive the electromagnetic lock to rotate according to the parameter setting requirements to achieve automatic running-in, and check the running-in surface after the running-in is completed; if the running-in surface is qualified, perform the electromagnetic lock dynamic friction torque test and static friction torque test; if the running-in surface is unqualified, perform the electromagnetic lock running-in test again until the running-in surface is qualified, and then perform the electromagnetic lock dynamic friction torque test and static friction torque test.

[0068] (5) The present invention develops relevant control programs, which can realize dynamic and static friction torque tests at any speed and number of circles from 1 to 1000 rpm. It can realize multi-point testing of the static friction torque of the electromagnetic lock in a whole circle, and up to 360 points can be tested in one circle. It can realize high-precision testing of the dynamic friction torque of the electromagnetic lock, and the sampling frequency can reach 200Hz. The present invention designs special testing software to collect and control data for the power supply, data acquisition module, and servo motor controller. It can display the friction torque value in real time, perform relevant statistical calculations, and draw curves. Obtaining the change curve of the friction torque with time, phase, and speed is more conducive to the study of the friction torque of the electromagnetic lock.

[0069] (6) The present invention adopts a modular design, and can meet the test requirements of electromagnetic locks of different specifications by replacing the torque speed sensor and the servo motor. A set of measurement and control units can be used in conjunction with multiple test benches. While the measurement range is wide, the measurement accuracy is high, and the test error is less than 0.005Nm when testing 0-10Nm; and the test error is less than 0.025Nm when testing 10-50Nm.

[0070] The contents not described in detail in this application specification belong to the common knowledge of those skilled in the art.

[0071] The present application is described in detail above in conjunction with specific implementation methods and exemplary examples, but these descriptions cannot be understood as limiting the present application. Those skilled in the art understand that, without departing from the spirit and scope of the present application, a variety of equivalent replacements, modifications or improvements can be made to the technical solution of the present application and its implementation methods, all of which fall within the scope of the present application. The scope of protection of the present application shall be subject to the attached claims.

Claims

1. An electromagnetic lock running-in and friction torque automatic testing system, characterized by: The invention comprises a test bench (1), wherein the test bench (1) comprises a fixed base (15), an electromagnetic lock (3), a first coupling (4), a torque speed sensor (5), a second coupling (6) and a servo motor (7); an electromagnetic lock fixing assembly (13) and a servo motor fixing assembly (14) are fixed on the fixed base (15); a stator part of the servo motor (7) is fixedly connected to the servo motor fixing assembly (14); a stator part of the electromagnetic lock (3) is fixedly connected to the electromagnetic lock fixing assembly (13); a rotor part of the electromagnetic lock (3) is connected and fixed to the torque speed sensor (5) via the first coupling (4); and the torque speed sensor (5) is connected and fixed to the output shaft of the servo motor (7) via the second coupling (6).

2. The electromagnetic lock running-in and friction torque automatic testing system according to claim 1, characterized in that: The invention also comprises a measurement and control unit (2), the measurement and control unit (2) comprising a power supply (8), a data acquisition module (9), a servo motor controller (10) and an industrial control computer (11), wherein the power supply (8) is used to supply power to the electromagnetic lock (3); the data acquisition module (9) is used to collect detection data of the torque and speed sensor (5); the servo motor controller (10) is used to close-loop control the servo motor (7); the industrial control computer (11) controls whether the power supply (8) supplies power to the electromagnetic lock (3), whether the data acquisition module (9) collects data from the torque and speed sensor (5), controls the start and stop and the speed of the servo motor (7), and processes the detection data through the test software (12).

3. The electromagnetic lock running-in and friction torque automatic testing system according to claim 2 is characterized by: A wire crimping box is installed on the test bench (1), and the power supply (8) leads the positive and negative terminals to the wire crimping box through cables, and the lead wires of the electromagnetic lock (3) can be directly fixed on the wire crimping box.

4. The electromagnetic lock running-in and friction torque automatic testing system according to claim 2, characterized in that: The electromagnetic lock (3) can be divided into a permanent magnet electromagnetic lock and an electromagnetic electromagnetic lock. The permanent magnet electromagnetic lock is locked when power is not supplied, while the electromagnetic electromagnetic lock is locked when power is supplied. The electromagnetic lock is locked by supplying power to or disconnecting power to the electromagnetic lock through the power supply (8).

5. The electromagnetic lock running-in and friction torque automatic testing system according to claim 2, characterized in that: One measurement and control unit (2) is used in conjunction with one or more test benches (1).

6. A method for automatically testing the running-in and friction torque of an electromagnetic lock, characterized in that: The electromagnetic lock running-in and friction torque automatic testing system according to any one of claims 1 to 5 is used for measurement, comprising: firstly running-in the electromagnetic lock (3), and checking the running-in surface condition after running-in; If the running-in surface is qualified, the electromagnetic lock (3) dynamic friction torque test or the electromagnetic lock (3) static friction torque test is performed; if the running-in surface is unqualified, the electromagnetic lock is run-in again until the running-in surface is qualified, and then the electromagnetic lock (3) dynamic friction torque test or the electromagnetic lock (3) static friction torque test is performed.

7. The electromagnetic lock running-in and friction torque automatic testing method according to claim 6 is characterized in that: The electromagnetic lock running-in comprises: starting a servo motor (7) to drive the electromagnetic lock (3) to rotate, and at the same time intermittently energizing and de-energizing the electromagnetic lock (3) through a power supply (8), and checking the running-in surface condition after running-in for a set time; The running-in surface is the mating surface between the rotor and the stator. When the wear marks on the running-in surface are uniform, the running-in surface is considered qualified.

8. The electromagnetic lock running-in and friction torque automatic testing method according to claim 6 is characterized in that: The dynamic friction torque test of the electromagnetic lock (3) comprises: According to the type of the electromagnetic lock (3), controlling the power supply / power-on state of the power supply (8) so that the electromagnetic lock (3) is in a locked state; The servo motor (7) drives the torque speed sensor (5) and the electromagnetic lock (3) to rotate at a constant speed according to a set speed; The data acquisition module (9) reads the torque value fed back by the torque speed sensor (5), and feeds back the torque value to the industrial control computer (11). The industrial control computer (11) draws a dynamic friction torque curve according to the torque value and obtains the dynamic friction torque.

9. The electromagnetic lock running-in and friction torque automatic testing method according to claim 6, characterized in that: The static friction torque test of the electromagnetic lock (3) comprises: S1: According to the type of the electromagnetic lock (3), the power supply / power-on state of the power supply (8) is controlled to put the electromagnetic lock (3) into a locked state; S2: the electromagnetic lock (3) under test is in a stationary state, and the servo motor (7) slowly increases the current until the servo motor (7) drives the electromagnetic lock (3) to be in a critical state between rotation and stationary state. At this time, the maximum torque value measured by the torque speed sensor (5) is the static friction torque of the electromagnetic lock. The data acquisition module (9) reads all the measurement data fed back by the torque speed sensor (5), and feeds the measurement data back to the industrial control computer (11). The industrial control computer (11) determines the maximum torque value from all the measurement data as the friction torque T1 in this state; S2: Continue to increase the current so that the servo motor (7) drives the electromagnetic lock (3) to rotate to the next set angle, and then reduce the current so that the electromagnetic lock stops rotating; S3: repeating the above steps S1 and S2 to implement a multi-point test of the static friction torque of the electromagnetic lock (3) at 360°, and obtaining the friction torque T1 of multiple measurement points; S4: After the 360° test is completed, the friction torque T1 obtained from all the test points is averaged after being processed by the industrial control computer (11) and is used as the static friction torque of the electromagnetic lock (3).

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