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Power simulation method of permanent magnet synchronous motor

A technology of permanent magnet synchronous motor and simulation method, which is applied in the direction of motor generator testing, etc., can solve the problems of no permanent magnet synchronous motor simulation research, etc., and achieve the effect of simple overall structure design, accurate static and dynamic characteristics, and energy saving

Active Publication Date: 2013-12-25
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that there is no simulation research on permanent magnet synchronous motors in the prior art mentioned in the above background technology, the present invention proposes a power simulation method for permanent magnet synchronous motors

Method used

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  • Power simulation method of permanent magnet synchronous motor
  • Power simulation method of permanent magnet synchronous motor
  • Power simulation method of permanent magnet synchronous motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] ① Motor start-up test.

[0048] After setting the initial value of each parameter of the simulated motor, start the simulation to simulate the start of the motor. By setting the load torque T in the mathematical analysis module of the simulated motor L The initial value of the motor can simulate the no-load start (T L =0) or start with load (T L ≠0). Example, for start-up with load (T L =12N / m). as attached Figure 8 Shown is the speed waveform of the motor. The motor speed starts from 0 and gradually rises to the rated speed of 750r / min. This period of time is the starting time of the motor. as attached Figure 9 It shows the magnitude of the quadrature axis current of the motor. During the starting process of the motor, there may be a large starting current and the risk of burning out the motor. By detecting this current, the starting current of the motor can be determined. If the starting current is too large, it is necessary to Adjust the motor parameters or...

Embodiment 2

[0050] ② By changing the load torque T in the mathematical analysis module of the simulated motor L To simulate the variable load operation of permanent magnet synchronous motor.

[0051] In this embodiment, the motor runs with load, the initial T L =12N / m, at 0.2 seconds, T L The value of is changed to 16N / m to simulate the load operation of the motor. Figure 6-Figure 10 Among them, after 0.2s, it can be seen that the output changes after the motor changes load operation, the most direct one is Figure 9 The shown motor torque waveform changes from 12N / m to 16N / m; the quadrature axis current also changes accordingly, but the motor speed remains basically unchanged, and the direct axis current also remains unchanged, which is basically 0. In the actual motor test, if the load carried by the motor is too large, there will be dangers such as excessive temperature rise, excessive current, damage to insulation, and motor burnout. Through the simulation of the simulated motor,...

Embodiment 3

[0053] ③ By changing the reference angular velocity ω in the vector control module r * To simulate the frequency conversion speed regulation of permanent magnet synchronous motor.

[0054] In this embodiment, the given initial reference angular velocity That is, the motor first runs at the rated speed of 750r / min, and at 0.4s, the reference angular velocity It can simulate the frequency conversion speed regulation of the motor. Figure 6-Figure 10 Among them, after 0.4s, it can be seen that after the motor frequency conversion speed regulation, the changes of each output, the most direct one is Figure 8 The motor speed waveform shown is changed from 750r / min to 1200r / min; the characteristics of frequency conversion change from Figure 10 It can be clearly seen that after 0.4s, the frequency of the stator current of the motor changes significantly. It can be seen from the above figure that after the motor frequency conversion speed regulation, the size of each output ca...

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Abstract

The invention belongs to the application field of a power electronic technology in a power system, in particular relates to a power simulation method of a permanent magnet synchronous motor, and provides a novel method for power simulation of the permanent magnet synchronous motor. A simulated motor model capable of accurately simulating the permanent magnet synchronous motor is designed by adopting double PWM (Pulse-Width Modulation) converter structures according to the basic characteristics of the permanent magnet synchronous motor, wherein the converters at a rectifier side of the simulated motor model are controlled according to the characteristics of the permanent magnet synchronous motor, so that the external interface characteristic voltage, the current, the rotating speed and other information of the simulated motor model are consistent with those of the actual motor; and the energy is fed back to a supply network by the inverter side. The simulated motor model is compact in whole structure design and is capable of accurately simulating the static characteristics and the dynamic characteristics of the actual permanent magnet synchronous motor. The simulated motor model is strong in adaptability, namely, the simulated motor model can be used for simulating various types of permanent magnet synchronous motors by only changing parameter setting in the simulated motor model. The electric energy during the testing is fed back to the supply network by the inverter side due to the adoption of an energy-feedback-type electronic load structure, so that the energy saving is realized.

Description

technical field [0001] The invention particularly relates to a power simulation method of a permanent magnet synchronous motor, which belongs to the field of application of power electronics technology in power systems. Background technique [0002] An electronic load is a power electronic device that can simulate a real load. It can simulate various types of loads and feed back electrical energy to the grid. Because of its flexible performance, it is widely used in the factory test of UPS, DC power supply and variable frequency power supply. Compared with ordinary loads, its working method is to use power electronic conversion technology to regenerate the output energy of the power supply under test after completing the test power test. [0003] In recent years, scholars at home and abroad have conducted in-depth research on the simulation of electronic loads, but the current research focuses on the simulation of impedance loads, and less simulation of motor loads. The pe...

Claims

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Application Information

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IPC IPC(8): G01R31/34
Inventor 毕大强金阳
Owner TSINGHUA UNIV
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