Permanent magnetism synchronous electric machine test system and method

Abstract

The present invention discloses a permanent magnet synchronous machine test system and a test method thereof. The test system comprises an inverter, a permanent magnet synchronous machine, a test computer and a temperature sensor. The invention is characterized in that the side of the permanent magnet synchronous machine is provided with a rotor position sensor which is connected with the test computer through a DSP chip. The rotating axis of the rotor is also connected with a rotation-blocking device. As the test system and test method are adopted, the inductor parameter measurement of the permanent magnet motor is executed through the rotor position sensor and the rotation-blocking device which fixes the position of the magnetic pole of the rotor. The position of the rotor is detected through a device which fixes the position of rotor with simple regulation and a DSP chip. The rotor of electric machine is finally fixed to the test position through a method of testing together with regulating. The inductor parameter test is realized through a voltage integrating method. Compared with prior art, the invention uses a simple device and uncomplicated method for realizing an accurate measurement to the inductor parameter of the permanent magnet synchronous machine.

Description

technical field [0001] The invention relates to a motor testing device, in particular to a test coefficient and a test method of an embedded permanent magnet synchronous motor. Background technique [0002] The direct-axis and quadrature-axis inductances of permanent magnet synchronous motors have a great influence on the steady-state and dynamic performance of permanent magnet synchronous motors, and the accuracy of direct-axis and quadrature-axis inductance parameters is not only important for predicting torque and field weakening performance but also for design Control system design for maximum efficiency, power factor, etc. is critical. The effect of magnetic saturation is usually accounted for in terms of inductance that varies with inductance. Therefore, it is very important to determine the inductance parameters of the direct axis and the quadrature axis. At present, a variety of techniques are used to predict the winding inductance, such as the finite element metho...

AI Technical Summary

Problems solved by technology

Since permanent magnet synchronous motors are excited by permanent magnets, the test methods for the quadrature axis and direct axis inductance parameters are very different from those of electric excitation synchronous motors.

Moreover, the shape and position of the permanent magnets in the permanent magnet synchronous motor are various, the rotor AC and direct axis magnetic circuits are extremely complex, and the inductance parameters are not only related to the saturation of the magnetic circuit, but also the phenomenon of cross saturation between the AC and direct axis magnetic circuits

The commonly used DC attenuation method and voltage integration method have relatively high requirements for test equipment and are relatively complicated.

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