Motor offline detection system and equipment

Abstract

The utility model relates to a motor off-line detection system and equipment, which are used for detecting various indexes of a motor to be detected, the motor off-line detection system comprises a test unit which is electrically connected with the motor to be detected, and the test unit comprises an insulation voltage resistance test module, a winding test module and an inductance test module, the insulation and voltage resistance test module comprises an insulation test module and a voltage resistance test module; wherein the winding test module can detect the winding resistance of the three-phase wiring end; the inductance testing module can detect the inductance of the three-phase wiring end; and the insulation test module is used for detecting insulation resistance between the three-phase wiring end and the temperature sensor and the position sensor. According to the utility model, the plurality of test modules are integrated, and the control unit is combined to realize automatic switching among the plurality of test modules, so that the tedious operation that a plurality of test instruments are independently connected with the motor is avoided, and the stability of the motor before rotation is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor detection technical field especially is a kind of motor off-line detection system and equipment. BACKGROUND

[0002] The stability test of motor is the important link to ensure that motor remains stability and reliability in long-time operation. Specifically, the stability test mainly includes monitoring and analyzing the operating parameters of motor under various working conditions to evaluate its stability and performance. These tests usually involve the measurement of parameters such as vibration, temperature, speed, current and voltage of motor, as well as the response characteristics of motor under different loads and speeds. Before the stability test of motor, the performance test of insulation, voltage resistance, winding resistance and other aspects of each terminal of motor is needed to ensure that the connection of circuit structure inside motor is perfect. Currently, the precision of motor detection device on the market is not high, and the detection of motor is usually carried out by multiple independent instruments respectively, which needs operating personnel to connect respectively.

[0003] The deficiency of prior art is that there are many existing measuring instruments, and after measuring one motor parameter, operating personnel need to replace cable and measuring instrument, so frequent switching is needed, which is time-consuming and laborious, and there may be the situation of wrong connection of cable, and the detection efficiency is not high. UTILITY MODEL CONTENT

[0004] Therefore, the utility model solves the technical problems in the prior art, provides a motor off-line detection system and equipment, which can test the insulation, voltage resistance, winding resistance and other indicators of each terminal of motor before the stability test of motor, does not need to use single instrument single loop connection line when testing motor terminal, only needs to connect the required port, can self-switch, so as to improve motor detection efficiency, reduce operation process and improve measurement precision.

[0005] To solve the above technical problems, the utility model provides a kind of motor off-line detection system, for detecting the various indicators of the motor to be measured, the motor to be measured includes shell, three-phase connection terminal, temperature sensor and position sensor, the motor off-line detection system includes,

[0006] A test unit is electrically connected with the motor to be tested, and the test unit comprises an insulation withstand voltage test module, a winding test module and an inductance test module, the insulation withstand voltage test module comprises an insulation test module and a withstand voltage test module; the winding test module can detect winding resistance of the three-phase terminal; the inductance test module can detect inductance of the three-phase terminal; the insulation test module is used for detecting insulation resistance between the three-phase terminal and a temperature sensor and a position sensor, and is also used for detecting insulation resistance between the shell and the position sensor; the withstand voltage test module is used for detecting withstand voltage between the three-phase terminal and the temperature sensor and the shell, and is also used for detecting withstand voltage between the shell and the position sensor.

[0007] A control unit is communicatively connected with the test unit, the control unit collects test data of the test unit, performs data processing, and outputs a control signal to the test unit, and the test unit tests corresponding parameters of the motor to be tested under control of the control unit.

[0008] In an embodiment of the utility model, the three-phase terminal includes U column, V column and W column, the position sensor includes a rotary transformer, the rotary transformer includes first signal output end REF+, second signal output end SIN+ and third signal output end COS+, and the temperature sensor includes temperature sensor positive output end and temperature sensor negative output end.

[0009] In an embodiment of the utility model, the insulation withstand voltage test module includes first terminal, second terminal, third terminal, fourth terminal and loop port, the first terminal is connected with the U column, the second terminal is connected with the V column, the third terminal is connected with the W column, the fourth terminal is connected with the shell, and the loop port is connected with the temperature sensor, the position sensor and the shell.

[0010] In an embodiment of the utility model, the loop port is connected with the temperature sensor positive output end, the temperature sensor negative output end, the first signal output end REF+, the second signal output end SIN+, the third signal output end COS+ and the shell respectively.

[0011] In an embodiment of the utility model, the inductance test module includes fifth terminal and sixth terminal, the fifth terminal is connected with the U column or the V column, and the sixth terminal is connected with the V column or the W column.

[0012] In an embodiment of the utility model, the winding test module includes seventh wiring terminal, eighth wiring terminal, ninth wiring terminal, tenth wiring terminal and eleventh wiring terminal, the seventh wiring terminal is connected with the U column or the V column, the eighth wiring terminal is connected with the V column or the W column, the ninth wiring terminal is connected with the shell, the tenth wiring terminal is connected with the shell, the eleventh wiring terminal is connected with the temperature sensor.

[0013] In an embodiment of the utility model, the insulation withstand voltage test module adopts high-voltage cable and high-voltage switch.

[0014] In an embodiment of the utility model, the control unit includes a relay module, which is in communication connection with the test unit to control the test unit to switch different test lines.

[0015] In an embodiment of the utility model, the insulation withstand voltage test module includes AT93208, the winding test module includes AT5108, and the inductance test module includes AT3810.

[0016] The utility model also provides a motor offline detection equipment, including box, man -machine interaction module and a motor offline detection system as described above, the motor offline detection system is arranged in the box, the man -machine interaction module can be detachably installed in the box.

[0017] The above technical scheme of the utility model has the following advantages compared with the prior art:

[0018] The motor offline detection system has a test unit and a control unit, the test unit is electrically connected with the motor to be tested, and the test unit includes an integrated insulation withstand voltage test module, a winding test module and an inductance test module; the control unit is in communication connection with the test unit to output a control signal to the test unit. The insulation test module can detect the insulation resistance between the three-phase wiring terminal and the temperature sensor and the position sensor, the withstand voltage test module can perform withstand voltage test on the three-phase wiring terminal, the temperature sensor and the shell and the position sensor, the winding test module can detect the winding of the three-phase wiring terminal, and the inductance test module can detect the inductance of the three-phase wiring terminal. By integrating multiple test modules and combining the control unit, the automatic switching between the multiple test modules is realized, so that multiple detection items can be efficiently completed, and the tedious operation of connecting the motor with multiple test instruments is avoided. The motor terminal can be comprehensively detected to ensure the stability of the motor before rotation. In addition, the motor offline detection system has high precision, good safety and high automation, and is suitable for motor production, maintenance and quality detection fields. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to make the content of the utility model more easily be clearly understood, the following according to the specific embodiment of the utility model and combining with the drawings, the utility model is further explained in detail, wherein.

[0020] Figure 1 It is the connection structure schematic diagram of the detection system of the preferred embodiment of the utility model.

[0021] Figure 2 It is the wiring structure schematic diagram of the insulation withstand voltage test module and the motor to be measured of the preferred embodiment of the utility model.

[0022] Figure 3 It is the wiring structure schematic diagram of the inductance test module and the motor to be measured of the preferred embodiment of the utility model.

[0023] Figure 4 It is the wiring structure schematic diagram of the winding test module and the motor to be measured of the preferred embodiment of the utility model.

[0024] Figure 5 It is the schematic diagram of the motor to be measured in the specific embodiment of the utility model.

[0025] Figure 6 It is the overall structure schematic diagram of the detection equipment of the preferred embodiment of the utility model.

[0026] Description of the drawing mark of the specification: 100, shell;200, temperature sensor;300, position sensor;400, box;500, keyboard;600, display screen;10, insulation withstand voltage test module;20, inductance test module;30, winding test module;1, first wiring end;2, second wiring end;3, third wiring end;4, fourth wiring end;5, fifth wiring end;6, sixth wiring end;7, seventh wiring end;8, eighth wiring end;9, ninth wiring end;11, tenth wiring end;12, eleventh wiring end. Specific embodiment

[0027] The utility model is further explained in combination with the drawings and specific embodiments, so that the person skilled in the art can better understand the utility model and can be implemented, but the embodiment is not as the limitation of the utility model. Example one

[0028] Referring to Figures 1 to 5 The utility model discloses a kind of motor offline detection systems, for detecting the various indexes of motor to be measured. Among them, the motor to be measured includes shell 100, three-phase wiring end, temperature sensor 200 and position sensor 300.

[0029] The motor offline detection system includes a testing unit, which is electrically connected to the motor under test via a cable.

[0030] Specifically, the test unit includes an integrated insulation withstand voltage test module 10, an inductance test module 20, and a winding test module 30. In detail, the insulation withstand voltage test module 10 includes an insulation test module and a withstand voltage test module.

[0031] The winding test module 30 is capable of detecting the winding resistance of the three-phase terminals, the grounding resistance of the housing 100, and the thermistor.

[0032] The inductance testing module 20 can detect the inductance of the three-phase terminals.

[0033] The insulation test module is used to detect the insulation resistance between the three-phase terminals and the temperature sensor 200 and the position sensor 300, and to detect the insulation resistance between the housing 100 and the position sensor 300.

[0034] The withstand voltage test module is used to perform withstand voltage tests between the three-phase terminals and the temperature sensor 200, and between the three-phase terminals and the housing 100. In addition, it can also perform withstand voltage tests between the housing 100 and the position sensor 300.

[0035] Furthermore, the motor offline testing system also includes a control unit, which is communicatively connected to the testing unit. The control unit collects test data from the testing unit, processes the data, and outputs control signals to the testing unit; the testing unit, under the control of the control unit, tests the corresponding parameters of the motor under test.

[0036] It should be noted that since the withstand voltage test is a high-voltage test, the system can automatically disconnect lines in the system that are not in a high-voltage testing environment during the withstand voltage test to prevent high voltage from damaging other modules.

[0037] Therefore, the motor offline testing system protected by this utility model includes a testing unit and a control unit. The testing unit is electrically connected to the motor under test and includes an integrated insulation withstand voltage test module, a winding resistance test module, and an inductance test module. The control unit is communicatively connected to the testing unit to output control signals to the testing unit. Specifically, the insulation test module can detect the insulation resistance between the three-phase terminals and the temperature and position sensors; the withstand voltage test module can perform withstand voltage tests between the three-phase terminals and the temperature sensor, housing, and position sensor; the winding resistance test module can detect the winding resistance of the three-phase terminals; and the inductance test module can detect the inductance of the three-phase terminals. By integrating multiple test modules and combining them with the control unit to achieve automated switching between them, various testing items can be efficiently completed, avoiding the cumbersome operation of connecting multiple testing instruments to the motor individually. It can achieve comprehensive testing of the motor terminals, thereby ensuring the stability of the motor before rotation. Furthermore, the motor offline testing system of this utility model has high accuracy, good safety, and a high degree of automation, making it suitable for motor production, maintenance, and quality inspection.

[0038] To improve testing accuracy, the detection system of this invention adopts a double-wire clamping method, that is, each test end has a pair of test wires, and the pair of test wires are clamped to the corresponding terminals of the motor under test by connecting clamps.

[0039] In one preferred embodiment, the three-phase terminals include a U-post, a V-post, and a W-post.

[0040] The position sensor 300 employs a rotary transformer, specifically, the rotary transformer includes a first signal output terminal REF+, a second signal output terminal SIN+, and a third signal output terminal COS+.

[0041] In motor control systems, resolvers accurately measure the rotor position, speed, and direction of rotation, transmitting these signals to the electronic control system. The electronic control system then uses software control algorithms to regulate the motor's operation based on these signals. REF+, SIN+, and COS+ represent the positive terminals of the reference signal, sine signal, and cosine signal, respectively. During the operation of the resolver, the REF+ terminal outputs the reference signal, which is typically used for comparison and calculation with the sine and cosine signals to determine the rotor's absolute position. The SIN+ terminal outputs a sine signal related to the rotor position; this signal changes with the rotor position, and its amplitude and phase information are used to calculate the rotor's specific position. The COS+ terminal outputs a cosine signal related to the rotor position. The combination of sine and cosine signals enables precise measurement of the rotor position.

[0042] The temperature sensor includes a positive output terminal and a negative output terminal.

[0043] In detail, the insulation withstand voltage test module 100 includes a first terminal 1, a second terminal 2, a third terminal 3, a fourth terminal 4, and a return port. The first terminal 1 is connected to the U-post, the second terminal 2 is connected to the V-post, the third terminal 3 is connected to the W-post, and the fourth terminal 4 is connected to the outer casing. Specifically, the fourth terminal 4 is connected to the first connection terminal of the outer casing.

[0044] The return loop port is connected to the temperature sensor 200, the position sensor 300, and the housing 100.

[0045] In detail, the insulation withstand voltage test module 10 includes an AT93208, the winding test module 30 includes an AT5108, and the inductance test module 20 includes an AT3810. The AT93208 has a measurement range of 0-1000V high voltage. The AT3810 has a measurement range of 0.00001μH-9999.99H with an accuracy of approximately 0.05%. The AT5108 has a measurement range of 1μΩ-30kΩ with an accuracy of approximately 0.05%.

[0046] Combination Figure 2 As shown, the return loop port is connected to the positive output terminal of the temperature sensor via the first switch S1; to the negative output terminal of the temperature sensor via the second switch S2; to the first signal output terminal REF+ via the third switch S3; to the second signal output terminal SIN+ via the fourth switch S4; to the third signal output terminal COS+ via the fifth switch S5; and to the outer casing via the sixth switch S6.

[0047] For insulation testing: the AT93208 instrument was used.

[0048] ①. When S1 is closed, all other switches are open.

[0049] Using insulation resistance mode, measure channels 1 (U column - temperature sensor +), 2 (V column - temperature sensor +), and 3 (W column - temperature sensor +).

[0050] ②. When switch S2 is closed, all other switches are open.

[0051] Use insulation resistance mode to measure channels 1 (U column - temperature sensor -), 2 (V column - temperature sensor -), and 3 (W column - temperature sensor -).

[0052] ③. When S3 is closed, all other switches are open.

[0053] Use insulation resistance mode to measure channels 1 (U column - REF+), 2 (V column - REF+), 3 (W column - REF+), and 4 (outer shell - REF+).

[0054] ④. When S4 is closed, all other switches are open.

[0055] Use insulation resistance mode to measure channels 1 (U column - SIN+), 2 (V column - SIN+), 3 (W column - SIN+), and 4 (outer shell - SIN+).

[0056] ⑤. When S5 is closed, all other switches are open.

[0057] Use insulation resistance mode to measure channels 1 (U column - COS+), 2 (V column - COS+), 3 (W column - COS+), and 4 (outer shell - COS+).

[0058] For the withstand voltage test: instrument AT93208 was used.

[0059] ① When S1 is closed, all other switches are open.

[0060] Use the withstand pressure mode to measure channels 1 (U column - temperature sensor +), 2 (V column - temperature sensor +), and 3 (W column - temperature sensor +).

[0061] ②. When switch S2 is closed, all other switches are open.

[0062] Use the pressure resistance mode to measure channels 1 (U column - temperature sensor -), 2 (V column - temperature sensor -), and 3 (W column - temperature sensor -).

[0063] ③. When S3 is closed, all other switches are open.

[0064] Use the pressure resistance mode to measure channel 4 (casing-REF+).

[0065] ④. When S4 is closed, all other switches are open.

[0066] Use the withstand voltage mode to measure channel 4 (casing - SIN+).

[0067] ⑤. When S5 is closed, all other switches are open.

[0068] Use the pressure resistance mode to measure channel 4 (casing-COS+).

[0069] ⑥. When S6 is closed, all other switches are open.

[0070] Use the pressure resistance mode to measure channels 1 (U column - housing), 2 (V column - housing), and 3 (W column - housing).

[0071] Looking further, combined with Figure 3As shown, the inductance testing module includes a fifth terminal 5 and a sixth terminal 6. The fifth terminal 5 is connected to the U-post or the V-post, and the sixth terminal 6 is connected to the V-post or the W-post.

[0072] In detail, the fifth connection terminal 5 is connected to the U-post or the V-post via switches K2, K4, and K5. K4 is a selector switch; when K2 and K5 are closed and K4 is open, the fifth connection terminal 5 is connected to the U-post; when K2 and K4 are closed, the fifth connection terminal 5 is connected to the V-post. The sixth connection terminal 6 is connected to the V-post or the W-post via switches K2, K6, and K7. K6 is a selector switch; when K2 and K7 are closed and K6 is open, the sixth connection terminal 6 is connected to the V-post; when K2 and K6 are closed, the sixth connection terminal 6 is connected to the W-post.

[0073] When measuring inductance, instrument 3810A is used.

[0074] ①. When K2, K5, and K7 are closed, all other switches are open.

[0075] Use inductance measurement mode to measure channel 1 (U-pillar to V-pillar).

[0076] ②. When K2, K5, and K6 are closed, the other switches are open.

[0077] Use inductance measurement mode to measure channel 1 (U-pillar to W-pillar).

[0078] ③. When K2, K4, and K6 are closed, the other switches are open.

[0079] Use the inductance measurement mode to measure channel 1 (V column - W column).

[0080] Furthermore, combining Figure 4 As shown, the winding test module 30 includes a seventh terminal 7, an eighth terminal 8, a ninth terminal 9, a tenth terminal 11, and an eleventh terminal 12. The seventh terminal 7 is connected to the U-post or the V-post, the eighth terminal 8 is connected to the V-post or the W-post, the ninth terminal 9 is connected to the housing 100, the tenth terminal 11 is connected to the housing 100, and the eleventh terminal 12 is connected to the temperature sensor 200.

[0081] In detail, the seventh terminal 7 is connected to either the U-post or the V-post via switches K3, K4, and K5. K4 is a selector switch; when K3 and K5 are closed and K4 is open, the seventh terminal 7 is connected to the U-post; when K3 and K4 are closed, the seventh terminal 7 is connected to the V-post. The eighth terminal 8 is connected to either the V-post or the W-post via switches K3, K6, and K7. K6 is a selector switch; when K3 and K7 are closed and K6 is open, the eighth terminal 8 is connected to the V-post; when K3 and K6 are closed, the eighth terminal 8 is connected to the W-post.

[0082] The ninth terminal 9 is connected to the first connection terminal of the housing via switch K8, the tenth terminal 11 is connected to the second connection terminal of the housing via switch K8, and the eleventh terminal 12 is connected to the temperature sensor + and the temperature sensor - via switch K11.

[0083] When measuring winding resistance: the AT5108 instrument is used.

[0084] ①. When K3, K5, and K7 are closed, all other switches are open.

[0085] Use the winding resistance measurement mode to measure channel 1 (UV)

[0086] ②. When K3, K5, and K6 are closed, the other switches are open.

[0087] Use the winding resistance measurement mode to measure channel 1 (UW)

[0088] ③. When K3, K4, and K6 are closed, the other switches are open.

[0089] Use the winding resistance measurement mode to measure channel 1 (VW).

[0090] ④. K8 is closed, and all other switches are open.

[0091] Use the winding resistance measurement mode to measure channel 2 (outer shell 1 - outer shell 2).

[0092] ⑤. K11 is closed, other switches are open.

[0093] Use the winding resistance measurement mode to measure channel 3 (temperature sensor +- temperature sensor -).

[0094] In a preferred embodiment, the insulation withstand voltage test module uses high-voltage resistant cables and high-voltage resistant switches. Specifically, since the AT93208 instrument involves high-voltage testing (1000V), the other two instruments cannot be connected to high voltage. High voltage requires high-voltage resistant cables, so the lines cannot be directly connected; switches are used to switch the connections. The high-voltage line switching switches are: high-voltage resistant switches for S1-S6, and ordinary switches for the other K switches.

[0095] In a preferred embodiment, the control unit includes a relay module, the relay...

[0096] The module is communicatively connected to the test unit to control the test unit to switch between different test lines.

[0097] Specifically, the relay module uses a 485 relay. Example 2

[0098] This utility model also discloses a motor off-line testing device, see reference. Figure 6 As shown, the motor offline testing equipment includes a housing 400, a human-machine interaction module, and a motor offline testing system as described in Embodiment 1.

[0099] The motor offline detection system is installed inside the housing 400, and the human-machine interaction module is detachably installed in the housing.

[0100] The human-computer interaction device includes a keyboard 500 and a display screen 600, the display screen 600 being detachably installed in the housing 400.

[0101] This equipment does not require a single instrument or single-circuit connection line when performing motor terminal tests. It only needs to connect to the required ports and can automatically switch between them, taking accuracy requirements into account during the switching process. Simply clamp the U-post, V-post, W-post, and housing of the motor with the clamps provided on the machine, and then plug the machine's connection terminals into the temperature sensor and position sensor connectors respectively. The software on the machine that automatically executes the steps will then start the test.

[0102] Therefore, this equipment, by integrating multiple testing instruments and automated switching technology, achieves comprehensive testing of motor terminals, ensuring the stability of the motor before rotation. The system features high precision, high automation, and high safety, making it suitable for motor production, maintenance, and quality inspection. Through automated testing processes, testing efficiency is significantly improved, and the risks and errors of manual operation are reduced.

[0103] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0104] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0105] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A motor off-line testing system for detecting various indicators of a motor under test, characterized in that: The motor under test includes a housing, three-phase terminals, a temperature sensor, and a position sensor. The motor offline detection system includes... A test unit, electrically connected to the motor under test, includes an insulation withstand voltage test module, a winding resistance test module, and an inductance test module. The insulation withstand voltage test module includes an insulation test module and a withstand voltage test module. The winding resistance test module can detect the winding resistance of the three-phase terminals; the inductance test module can detect the inductance of the three-phase terminals; the insulation resistance test module is used to detect the insulation resistance between the three-phase terminals and the temperature sensor and the position sensor, and also to detect the insulation resistance between the housing and the position sensor; the withstand voltage test module is used to detect the withstand voltage between the three-phase terminals and the temperature sensor and the housing, and also to detect the withstand voltage between the housing and the position sensor. The control unit is communicatively connected to the test unit. The control unit collects test data from the test unit, processes the data, and outputs control signals to the test unit. Under the control of the control unit, the test unit tests the corresponding parameters of the motor under test.

2. The motor offline detection system according to claim 1, characterized in that: The three-phase terminals include a U-post, a V-post, and a W-post; the position sensor includes a rotary transformer, which includes a first signal output terminal REF+, a second signal output terminal SIN+, and a third signal output terminal COS+; the temperature sensor includes a positive output terminal and a negative output terminal.

3. The motor offline detection system according to claim 2, characterized in that: The insulation withstand voltage test module includes a first terminal, a second terminal, a third terminal, a fourth terminal, and a loop port. The first terminal is connected to the U-post, the second terminal is connected to the V-post, the third terminal is connected to the W-post, the fourth terminal is connected to the housing, and the loop port is connected to the temperature sensor, the position sensor, and the housing.

4. The motor offline detection system according to claim 3, characterized in that: The circuit ports are respectively connected to the positive output terminal of the temperature sensor, the negative output terminal of the temperature sensor, the first signal output terminal REF+, the second signal output terminal SIN+, the third signal output terminal COS+, and the outer casing.

5. The motor offline detection system according to claim 2, characterized in that: The inductance testing module includes a fifth terminal and a sixth terminal. The fifth terminal is connected to the U-post or the V-post, and the sixth terminal is connected to the V-post or the W-post.

6. The motor off-line detection system according to claim 2, characterized in that: The winding test module includes a seventh terminal, an eighth terminal, a ninth terminal, a tenth terminal, and an eleventh terminal. The seventh terminal is connected to the U-post or the V-post, the eighth terminal is connected to the V-post or the W-post, the ninth terminal is connected to the outer casing, the tenth terminal is connected to the outer casing, and the eleventh terminal is connected to the temperature sensor.

7. The motor offline detection system according to claim 1, characterized in that: The insulation withstand voltage test module uses high-voltage resistant cables and high-voltage resistant switches.

8. The motor offline detection system according to claim 1, characterized in that: The control unit includes a relay module, which is communicatively connected to the test unit to control the test unit to switch between different test lines.

9. A motor offline detection system according to any one of claims 1-8, characterized in that: The insulation withstand voltage test module includes AT93208, the winding test module includes AT5108, and the inductance test module includes AT3810.

10. A motor off-line testing device, characterized in that: The device includes a housing, a human-machine interface module, and a motor off-line detection system as described in any one of claims 1-9, wherein the motor off-line detection system is disposed within the housing, and the human-machine interface module is detachably installed within the housing.

Images