Multi-type motor comprehensive experiment system and experiment method thereof

Abstract

The invention discloses a multi-type motor comprehensive experiment system which comprises a base frame and a first bearing seat installed on the base frame. The second bearing seat and the first bearing seat are arranged in a spaced mode, and the second bearing seat is installed on the base frame; transmission shafts are arranged in the first bearing seat and the second bearing seat, a torque sensor base is arranged between the first bearing seat and the second bearing seat, a torque sensor is arranged on the torque sensor base, and a first coupler and a second coupler are arranged on the left side and the right side of the torque sensor respectively; the first bearing seat and the second bearing seat pass through the first L-shaped base and the second L-shaped base respectively; a first mounting clamp is arranged on the left side of the first L-shaped base, and a second mounting clamp is arranged on the right side of the second L-shaped base; the first mounting fixture and the second mounting fixture can be used for mounting different types of motors in a butt joint manner; the platform is suitable for various common motor experiments, does not need to be repeatedly constructed and disassembled, can quickly replace different types of motors for experiments, shortens the experiment period, and reduces the experiment cost.

Description

Technical Field

[0001] The invention belongs to the field of motor experiments, and in particular relates to a multi-type motor comprehensive experiment system and an experiment method thereof. Background Art

[0002] With the development of motors, motor types have gradually diversified. The existing motor experimental system can no longer meet the experimental requirements of various types of motors. If a dedicated experimental system is designed according to the motor characteristics, it will not only prolong the test cycle, but also increase the experimental cost, and the experimental system cannot be reused. The main reason is that the reusability of the platform is not considered when designing the experimental system, which makes the experimental system limited in use and unable to meet the rapid experimental requirements of multiple types of motors. Summary of the invention

[0003] The present invention aims to solve the problem that the motor comprehensive experimental system in the prior art does not consider the reusability of the platform, resulting in limitations in the use of the experimental system and the inability to meet the rapid experimental requirements of multiple types of motors.

[0004] In response to the above defects or improvement needs of the prior art, the present invention specifically relates to a comprehensive experimental system for multiple types of motors, including: a base frame, a first bearing seat installed on the base frame; a second bearing seat arranged at a distance from the first bearing seat and installed on the base frame; a transmission shaft is arranged in the first bearing seat and the second bearing seat, a torque sensor base is arranged between the first bearing seat and the second bearing seat, a torque sensor is arranged on the torque sensor base, and a first coupling and a second coupling are arranged on the left and right sides of the torque sensor respectively; the first bearing seat and the second bearing seat are respectively connected through a first L-shaped base and a second L-shaped base; a first mounting fixture is arranged on the left side of the first L-shaped base, and a second mounting fixture is arranged on the right side of the second L-shaped base; the first mounting fixture and the second mounting fixture can be docked to install different types of motors.

[0005] Furthermore, a plurality of mounting holes are provided on the upper end surface of the base frame.

[0006] Furthermore, the first L-shaped base includes an L-shaped plate and panels located on both sides of the L-shaped plate, and the second L-shaped base has the same structure as the first L-shaped base and is symmetrically distributed; the L-shaped base supports the motor under test and the bearing seat, and its structural base has a simple structure, is easy to install, and is stable and reliable. The L-shaped structural base can be used to fix the experimental motor in the form of a cantilever, and the motor can be placed perpendicular to the ground to facilitate various experimental debugging such as towing and magnetic powder braking, and is easy to disassemble quickly.

[0007] Furthermore, a shock-absorbing pad is provided at the bottom of the base frame.

[0008] Furthermore, an encoder is provided on the transmission shaft, and the encoder is externally mounted at the end of the extension line of the motor axis. When different experiments need to be switched, the external encoder can be removed, the experimental motor can be replaced, and it can be installed and fixed on the first L-shaped base or the second L-shaped base. Since a detachable sleeve bearing is used, motors with different inner diameters can be tested, and then the encoder is installed at the end; when a motor towing experiment is performed, a torque sensor is installed between the two motors and fixed on the platform base; this platform is equipped with a shock absorber.

[0009] As another aspect of the present invention, it also relates to a test method of a comprehensive test system for multiple types of motors, including a magnetic field detection test method, a voltage test test method, a stall test method and a towing test method;

[0010] Furthermore, the magnetic field detection test method includes:

[0011] 1) Install the flywheel energy storage motor on the mounting fixture, make points at equal intervals along the surface of the permanent magnet of the flywheel energy storage motor, and use a Tesla meter to measure the magnetic field along the points and record it; if an oblique pole is used, the surface of each section of the permanent magnet in the axial direction needs to be measured and recorded along the circumference;

[0012] 2) Compare with the magnetic field simulation to verify the correctness of the permanent magnet arrangement.

[0013] Furthermore, the voltage test method includes:

[0014] 1) Install the flywheel energy storage motor on the mounting fixture, open-loop control the motor, and input the frequency and amplitude of the sine curve of the voltage test through the host computer. The input of the inverter is the ideal command curve;

[0015] 2) The inverter outputs an ideal drive signal to drive the motor, and the stator current value of the motor in the open-loop state is measured by a current clamp, and the specific measurement data is synchronized to the host computer;

[0016] 3) Combine oscilloscope data with matlab for analysis.

[0017] Furthermore, the stall test method includes:

[0018] 1) Install the flywheel energy storage motor on the mounting fixture. Before the test, the rotor position corresponding to the maximum stall current and minimum stall torque should be determined with low voltage. Unless otherwise specified, during the test, the DC bus voltage of the drive motor controller is set to the rated voltage.

[0019] 2) During the test, the motor rotor should be blocked, and the motor system should work in an actual cold state. By driving the motor controller, the required stall torque should be applied to the motor, and the stall torque and stall time should be recorded;

[0020] 3) Change the relative position of the motor stator and rotor, take 5 equally spaced blocking points along the circumference, and repeat the above test respectively. Before each repeated test, restore the motor to the actual cold state. The blocking time of each blocking test should be the same.

[0021] 4) Take the minimum value of the stall torque among the five measurement results as the stall torque of the motor system;

[0022] 5) Measure the stall characteristic curve.

[0023] Furthermore, the towing test method includes:

[0024] 1) Two flywheel energy storage motors are used to carry out a towing charge and discharge test, the first flywheel energy storage motor is discharged at rated speed, and the second flywheel energy storage motor is charged at rated power;

[0025] 2) After the second flywheel energy storage motor reaches the rated speed, it switches to the discharge state, and the first flywheel energy storage motor is charged again, and the cycle is repeated;

[0026] 3) Measure the voltage and current of the motor through the current clamp and voltage differential probe, obtain the motor speed signal through the encoder, and upload the measurement data to the host computer synchronously;

[0027] 4) Matlab is used for data processing and analysis.

[0028] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0029] (1) The multi-type motor comprehensive experimental system and experimental method of the present invention improve the versatility and reusability of the experimental system. By designing a detachable installation fixture, it can adapt to the installation of different types of motors without repeated assembly and disassembly. Different types of motors can be quickly replaced for experiments, shortening the experimental cycle and reducing the experimental cost. It avoids designing a dedicated experimental system for each motor separately, thereby improving the reuse rate of the platform.

[0030] (2) The multi-type motor comprehensive experimental system and experimental method of the present invention improve the experimental accuracy. The platform is equipped with torque sensors, encoders and other sensing devices, which can accurately measure the torque, speed and other key parameters of the motor, thereby improving the accuracy of the experimental data.

[0031] (3) The multi-type motor comprehensive experimental system and experimental method of the present invention are applicable to a variety of common motor experiments. The four experimental methods disclosed include magnetic field detection, voltage test, stall test and drag test, etc., which can meet the needs of common motor experiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1Schematic diagram of the overall structure of a preferred embodiment of the present invention (the motor is not shown);

[0033] Figure 2 It is a preferred embodiment of the present invention; a schematic diagram of the installation of the first L-shaped base or the second L-shaped base (the first L-shaped base is taken as an example in the figure);

[0034] In the figure: 1-base frame, 2-first bearing seat, 3-second bearing seat, 4-torque sensor base, 5-torque sensor, 6-No. 1 coupling, 7-No. 2 coupling, 8-first L-shaped base, 9-second L-shaped base, 10-first mounting fixture, 11-second mounting fixture, 12-encoder, 13-first transmission shaft, 14-second transmission shaft, 15-shock pad, 16-motor (such as flywheel energy storage motor, low electromagnetic vibration rotating motor). DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0036] Please refer to Figure 1 , a multi-type motor comprehensive experimental system and its specific implementation method are as follows:

[0037] In this embodiment, the multi-type motor comprehensive experimental system includes: a base frame 1, a first bearing seat 2 installed on the base frame 1; a second bearing seat 3 spaced apart from the first bearing seat 2 and installed on the base frame 1; a transmission shaft is arranged in the first bearing seat 2 and the second bearing seat 3; a torque sensor base 4 is arranged between the first bearing seat 2 and the second bearing seat 3, and a torque sensor 5 is arranged on the torque sensor base 4; a first coupling 6 and a second coupling 7 are respectively arranged on the left and right sides of the torque sensor 5.

[0038] The first bearing seat 2 and the second bearing seat 3 are installed through the first L-shaped base 8 and the second L-shaped base 9 respectively; a first mounting fixture 10 is arranged on the left side of the first L-shaped base 8, and a second mounting fixture 11 is arranged on the right side of the second L-shaped base 9; the first mounting fixture 10 and the second mounting fixture 11 can be docked to install different types of motors.

[0039] As a preferred solution, a plurality of mounting holes are provided on the upper end surface of the base frame 1 to facilitate the installation and removal of different motors;

[0040] Please refer to Figure 2As a preferred solution, the first L-shaped base 8 includes an L-shaped plate 81 and panels 8 located on both sides of the L-shaped plate. The second L-shaped base 9 has the same structure as the first L-shaped base 8 and is symmetrically distributed. The L-shaped base supports the motor under test and the bearing seat. The base structure is simple, easy to install, stable and reliable. The L-shaped base can be used to fix the experimental motor in the form of a cantilever, and the motor can be placed vertically on the ground to facilitate various experimental debugging such as towing and magnetic powder braking, and is easy to disassemble quickly.

[0041] As a preferred solution, a shock-absorbing pad 15 is provided at the bottom of the base frame 1.

[0042] As a preferred solution, an encoder 12 for the rotation speed of the transmission shaft is provided on the transmission shaft. The encoder is externally mounted at the end of the extension line of the motor axis. When it is necessary to switch between different experiments, the external encoder can be removed, and the experimental motor can be replaced and fixed on the first L-shaped base 8 or the second L-shaped base 9. Due to the use of a detachable sleeve bearing, motors with different inner diameters can be tested, and then the encoder 12 is installed at the end; when conducting a motor towing experiment, a torque sensor is added between the two motors and fixed on the platform base; this platform is equipped with a shock absorber, which can effectively reduce the impact of motor vibration at high speeds.

[0043] The experimental methods disclosed in this embodiment include: a magnetic field detection test method, a voltage test test method, a stall test method and a towing test method.

[0044] Among them, the magnetic field detection test method includes: making points at equal intervals along the surface of the motor's permanent magnet, using a Tesla meter to measure and record the magnetic field along the points; if an oblique pole is used, the surface of each section of the permanent magnet in the axial direction must be measured and recorded along the circumference; and compared with the magnetic field simulation to verify the correctness of the permanent magnet arrangement.

[0045] The voltage test experimental method includes: open-loop control of the motor, the frequency and amplitude of the sine curve of the voltage test are input through the host computer, and the input of the inverter is the ideal command curve; the inverter outputs an ideal drive signal to drive the motor, and the stator current value of the motor in the open-loop state is measured by a current clamp, and the specific measurement data is synchronized to the host computer; combined with the oscilloscope data and matlab for analysis.

[0046] The stall test method includes: determining the rotor position corresponding to the maximum stall current and the minimum stall torque before the test; blocking the drive motor rotor during the test, applying the required stall torque through the drive motor controller, and recording the stall torque and the stall time; changing the relative position of the stator and rotor of the drive motor, taking 5 stall points along the circumference to repeat the test; taking the minimum value of the stall torque in the 5 measurements as the stall torque of the system; and measuring the stall characteristic curve.

[0047] The towing test method includes: using two flywheel energy storage motors installed at the first mounting fixture 10 and the second mounting fixture 11, and discharging and charging them respectively; switching to the discharge state after the second motor reaches the rated speed; measuring the voltage and current through the current clamp and the voltage probe, obtaining the speed signal through the encoder, and uploading the measured data to the host computer synchronously; and performing data processing and analysis by MATLAB.

[0048] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A comprehensive experimental system for multiple motors, characterized by: The invention comprises: a base frame (1), a first bearing seat (2) mounted on the base frame (1); a second bearing seat (3) spaced apart from the first bearing seat and mounted on the base frame; a transmission shaft is arranged in the first bearing seat (2) and the second bearing seat (3); a torque sensor base (4) is arranged between the first bearing seat (2) and the second bearing seat (3); a torque sensor (5) is arranged on the torque sensor base (4); a first coupling (6) and a second coupling (7) are arranged on the left and right sides of the torque sensor (5); the first bearing seat (2) and the second bearing seat (3) are respectively connected through a first L-shaped base (8) and a second L-shaped base (9); a first mounting fixture (10) is arranged on the left side of the first L-shaped base (8), and a second mounting fixture (11) is arranged on the right side of the second L-shaped base (9); the first mounting fixture (10) and the second mounting fixture (11) can be connected to install different types of motors.

2. The multi-type motor comprehensive experimental system according to claim 1 is characterized in that: A plurality of mounting holes (11) are provided on the upper end surface of the base frame (1).

3. The multi-type motor comprehensive experimental system according to claim 1 is characterized in that: The first L-shaped base (8) comprises an L-shaped plate (81) and panels (82) located on both sides of the L-shaped plate. The second L-shaped base (9) has the same structure as the first L-shaped base (8) and is symmetrically distributed. The L-shaped base supports the motor under test and the bearing seat. The base structure is simple, easy to install, stable and reliable. The L-shaped base structure can be used to fix the experimental motor in the form of a cantilever. The motor can be placed vertically on the ground to facilitate various experimental debugging such as towing and magnetic powder braking, and is easy to disassemble quickly.

4. The multi-type motor comprehensive experimental system according to claim 3 is characterized in that: A shock-absorbing pad (15) is provided at the bottom of the base frame (1).

5. The multi-type motor comprehensive experiment system according to claim 3 is characterized in that: The experimental system adopts a universal SSI interface, which is convenient for connecting different types of motors for data collection and transmission; an encoder (12) is arranged on the transmission shaft; the encoder is externally mounted at the end of the extension line of the motor axis; when different experiments need to be switched, the external encoder can be removed, the experimental motor is replaced, and it is installed and fixed on the first L-shaped base (8) or the second L-shaped base (9); due to the use of a detachable sleeve bearing, motors with different inner diameters can be tested, and the encoder (12) is then installed at the end; when a motor towing experiment is performed, a torque sensor is installed between the two motors and fixed on the platform base; the platform is equipped with a shock absorber, which can effectively reduce the impact of motor vibration at high speed.

6. The test method of the multi-type motor comprehensive test system according to claim 1 is characterized in that: It includes magnetic field detection test method, voltage test test method, stall test method and towing test method.

7. The test method of the multi-type motor comprehensive test system according to claim 6 is characterized in that: The magnetic field detection test method comprises: 1) Install the flywheel energy storage motor on the mounting fixture, make points at equal intervals along the surface of the permanent magnet of the flywheel energy storage motor, and use a Tesla meter to measure the magnetic field along the points and record it; if an oblique pole is used, the surface of each section of the permanent magnet in the axial direction needs to be measured and recorded along the circumference; 2) Compare with the magnetic field simulation to verify the correctness of the permanent magnet arrangement.

8. The test method of the multi-type motor comprehensive test system according to claim 6 is characterized in that: The voltage test method comprises: 1) Install the flywheel energy storage motor on the mounting fixture, open-loop control the motor, and input the frequency and amplitude of the sine curve of the voltage test through the host computer. The input of the inverter is the ideal command curve; 2) The inverter outputs an ideal drive signal to drive the motor, and the stator current value of the motor in the open-loop state is measured by a current clamp, and the specific measurement data is synchronized to the host computer; 3) Combine oscilloscope data with matlab for analysis.

9. The test method of the multi-type motor comprehensive test system according to claim 6 is characterized in that: The stall test method comprises: 1) Install the flywheel energy storage motor on the mounting fixture. Before the test, the rotor position corresponding to the maximum stall current and minimum stall torque should be determined with low voltage. Unless otherwise specified, during the test, the DC bus voltage of the drive motor controller is set to the rated voltage. 2) During the test, the motor rotor should be blocked, and the motor system should work in an actual cold state. By driving the motor controller, the required stall torque should be applied to the motor, and the stall torque and stall time should be recorded; 3) Change the relative position of the motor stator and rotor, take 5 equally spaced blocking points along the circumference, and repeat the above test respectively. Before each repeated test, restore the motor to the actual cold state. The blocking time of each blocking test should be the same. 4) Take the minimum value of the stall torque among the five measurement results as the stall torque of the motor system; 5) Measure the stall characteristic curve.

10. The test method of the multi-type motor comprehensive test system according to claim 6, characterized in that: The towing test method comprises: 1) Two flywheel energy storage motors are used to carry out a towing charge and discharge test, the first flywheel energy storage motor is discharged at rated speed, and the second flywheel energy storage motor is charged at rated power; 2) After the second flywheel energy storage motor reaches the rated speed, it switches to the discharge state, and the first flywheel energy storage motor is charged again, and the cycle is repeated; 3) Measure the voltage and current of the motor through the current clamp and voltage differential probe, obtain the motor speed signal through the encoder, and upload the measurement data to the host computer synchronously; 4) Matlab is used for data processing and analysis.

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