Motor stator rotation direction testing device

Abstract

The utility model relates to a motor stator rotation direction testing device, which comprises a computer, a main control board, a testing cable, a signal cable and a magnetic sensor group, the computer is connected with the main control board, one end of the testing cable and one end of the signal cable are both connected with the main control board, the other end of the testing cable is connected with a stator UVW lead, and the magnetic sensor group is connected with the testing cable. The other end of the signal cable is connected with the magnetic sensor, the magnetic sensor group is arranged in the stator, and the magnetic sensor group comprises two vertically arranged magnetic sensors. The magnetic sensor is small in size and wide in adaptive motor stator diameter range, does not need to be matched with a plurality of testing devices for different stators, cancels the design of a false rotor, does not have a rotating device, cannot fly out to hurt people, and is safe and relieved.

Description

Technical Field

[0001] This utility model relates to a device for testing the stator rotation direction of an electric motor. Background Technology

[0002] Incorrect wiring sequence during motor stator assembly can cause the rotation direction to deviate from the expected direction, affecting normal equipment operation and potentially damaging the motor or load. A stator rotation direction testing device is used to determine the direction of the rotating magnetic field generated by the motor stator, ensuring the motor operates in the intended direction.

[0003] Currently, the dummy rotor method is a simple and effective way to determine the stator rotation direction by simulating rotor motion to determine the direction of the rotating magnetic field. Safety precautions must be taken during testing; a suitable dummy rotor must be used, and power supply matching must be ensured. This method is mostly used in motor repair and debugging. In mass production, this method is inefficient, has poor safety, and requires manual recording of test results. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a motor stator rotation direction testing device that does not require setting a dummy rotor, has a wide range of applications, and is easy to operate.

[0005] The technical solution adopted in this utility model is:

[0006] A motor stator rotation direction testing device includes a computer, a main control board, test cables, signal cables, and a magnetic sensor group. The computer is connected to the main control board. One end of the test cables and the signal cables are both connected to the main control board. The other end of the test cables is connected to the stator UVW leads. The other end of the signal cables is connected to the magnetic sensors. The magnetic sensor group is located inside the stator and includes two vertically arranged magnetic sensors.

[0007] Furthermore, the computer communicates with the main control board via an RS232 interface.

[0008] Furthermore, the magnetic sensor group also includes a conditioning module for conditioning the signals from the two magnetic sensors before sending them to the main control board.

[0009] Furthermore, the magnetic sensor is a coil or a Hall sensor.

[0010] Furthermore, it also includes a base, a stator seat disposed on one side of the base, a vertical rod fixedly disposed on the base, a first horizontal rod fixedly disposed on the vertical rod, and a second horizontal rod disposed on the first horizontal rod. The vertical rod, the first horizontal rod, and the second horizontal rod are all telescopic rods, and the magnetic sensor group is fixedly disposed at the end of the second horizontal rod.

[0011] Furthermore, limiting plates for limiting the stator are provided on both sides of the surface of the stator base, and the side of the limiting plate that contacts the stator is an inclined surface.

[0012] Furthermore, a sliding groove is provided on the stator base, and a connecting plate for cooperating with the sliding groove is provided on the inner side of the limiting plate. An elongated groove is provided on the sliding groove, and a through hole is provided on the connecting plate. The connecting plate is installed in the elongated groove and the two are fixedly connected by bolts.

[0013] The positive effects of this utility model are:

[0014] When this invention is in use, the computer issues commands, and the main control board provides power frequency to the stator. A rotating magnetic field is formed inside the stator. Two electromagnetic sensors convert the detected changes in the magnetic field into electrical signals, which are then conditioned and transmitted to the main control board. The main control board determines the stator's rotation direction based on the received signals and sends the data back to the computer. The magnetic sensors are small in size and can adapt to a wide range of motor stator diameters. There is no need to use multiple testing devices for different stators. The dummy rotor design is eliminated, and there are no rotating components, so there is no risk of the rotor flying out and injuring people, ensuring safety and peace of mind. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the base of this utility model;

[0017] Figure 3 This is a schematic diagram of the limiting plate structure of this utility model. Detailed Implementation

[0018] As attached Figure 1-3 As shown, this utility model discloses a motor stator rotation direction testing device, including a computer, a main control board, test cables, signal cables, and a magnetic sensor group. The computer and the main control board communicate via an RS232 interface. One end of the test cable is connected to the control board, and the other end is connected to the UVW lead of the stator. One end of the signal cable is connected to the main control board, and the other end is connected to the magnetic sensor group.

[0019] The magnetic sensor assembly includes two vertically positioned magnetic sensors and a conditioning module. The magnetic sensors convert detected changes in the magnetic field into electrical signals, which are then conditioned by the conditioning module and transmitted to the main control board. By analyzing the phase relationship between the two sensor signals (e.g., whether the horizontal signal leads or lags the vertical signal by 90 degrees), the rotation direction of the magnetic field can be determined, thereby ensuring that the motor operates in the expected direction.

[0020] In this embodiment, the magnetic sensor can be a coil or a Hall sensor, or other magnetic sensors. The communication structure can be replaced with a network port, RS485, parallel port, etc.

[0021] During testing, the magnetic sensor array is placed inside the stator under test, and the test cable is connected to the stator's UVW leads. The computer sends commands via an RS232 interface, and the main control board provides power frequency to the stator, creating a rotating magnetic field inside. The two magnetic sensors convert the detected magnetic field changes into electrical signals, which are then conditioned and transmitted to the main control board. The main control board determines the stator's rotation direction based on the received signals and sends the result back to the computer via the RS232 communication interface.

[0022] This invention features a small sensor size, adaptable to a wide range of motor stator diameters, eliminating the need for multiple testing devices for different stators. Furthermore, the computer automatically determines and records the stator rotation direction, eliminating the need for manual recording and preventing human error. With no rotating components, there is no risk of the sensor flying out and injuring people, ensuring safety. The main control board outputs the test power supply, featuring adjustable and controllable output current, overcurrent, overload, and short-circuit protection, effectively preventing damage to the motor stator.

[0023] During testing, the sensor is placed inside the stator being tested, and the test cable is connected to the stator's UVW leads. The computer sends commands via an RS232 interface, and the main control board provides power frequency to the stator, creating a rotating magnetic field inside. The sensor's two sets of coils convert the detected magnetic field changes into electrical signals, which are then conditioned and transmitted to the main control board for stator rotation. The main control board determines the stator's rotation direction based on the received signals and sends the result back to the computer via the RS232 communication interface.

[0024] As attached Figure 2 , 3 As shown, this utility model also includes a base 1, a stator seat 2 disposed on one side of the base 1, a vertical rod 6 fixedly disposed on the base 1, a first horizontal rod 7 disposed on the vertical rod 6, and a second horizontal rod 8 disposed on the first horizontal rod 7. The magnetic sensor assembly is fixedly disposed at the end of the second horizontal rod 8. The vertical rod 6, the first horizontal rod 7, and the second horizontal rod 8 are telescopic rods to realize the position adjustment of the magnetic sensor assembly, ensuring that the magnetic sensor assembly can be adjusted to a suitable position when testing stators of different diameters. An electrical control box 9 is also provided on the base 1.

[0025] Preferably, limiting plates 3 for positioning the stator are provided on both sides of the surface of the stator base 2, with the side in contact with the stator being an inclined surface 11. A sliding groove 4 is provided on the stator base 2, and a connecting plate 5 for cooperating with the sliding groove 4 is provided on the side of the limiting plate 3. An elongated groove 10 is provided on the bottom surface of the sliding groove 4, and a corresponding through hole is provided on the connecting plate 5. The connecting plate 5 is fitted into the elongated groove 10, and the two are fixedly connected by bolts. By adjusting the distance between the two limiting plates 3, it can be adapted to stators of different diameters to achieve stator positioning. Simultaneously, a positioning plate 12 can be provided at the front end of the two limiting plates 3 to achieve positioning of the front end of the stator.

[0026] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A device for testing the stator rotation direction of an electric motor, characterized in that... It includes a computer, a main control board, test cables, signal cables, and a magnetic sensor group. The computer is connected to the main control board. One end of the test cables and the signal cables are both connected to the main control board. The other end of the test cables is connected to the stator UVW leads. The other end of the signal cables is connected to the magnetic sensors. The magnetic sensor group is located inside the stator and includes two vertically arranged magnetic sensors.

2. The motor stator rotation direction testing device according to claim 1, characterized in that... The computer and the main control board are connected via an RS232 interface.

3. The motor stator rotation direction testing device according to claim 1, characterized in that... The magnetic sensor group also includes a conditioning module, which is used to condition the signals from the two magnetic sensors and send them to the main control board.

4. The motor stator rotation direction testing device according to claim 1, characterized in that... The magnetic sensor is either a coil or a Hall sensor.

5. The motor stator rotation direction testing device according to claim 1, characterized in that... It also includes a base (1), a stator seat (2) set on one side of the base (1), a vertical rod (6) fixed on the base (1), a first horizontal rod (7) fixed on the vertical rod (6), and a second horizontal rod (8) set on the first horizontal rod (7). The vertical rod (6), the first horizontal rod (7), and the second horizontal rod (8) are all telescopic rods, and the magnetic sensor group is fixedly set at the end of the second horizontal rod (8).

6. The motor stator rotation direction testing device according to claim 5, characterized in that... Limiting plates (3) for limiting the stator are provided on both sides of the surface of the stator base (2), and the side of the limiting plate (3) that contacts the stator is an inclined surface (11).

7. The motor stator rotation direction testing device according to claim 6, characterized in that... A sliding groove (4) is provided on the stator base (2), and a connecting plate (5) for cooperating with the sliding groove (4) is provided on the inner side of the limiting plate (3). An elongated groove (10) is provided on the sliding groove (4), and a through hole is provided on the connecting plate (5). The connecting plate (5) is installed in the elongated groove (10) and the two are fixedly connected by bolts.

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