Method for calculating magnetic flux linkage coefficient of electrically excited synchronous motor

Abstract

The invention discloses a method for calculating a magnetic flux linkage coefficient of an electrically excited synchronous motor. The method comprises the following steps: calculating a power angle at a set power based on motor nameplate parameters and data table parameters of an electrically excited synchronous motor; converting a magnetic field component and a torque component into a stator current D-axis component and a stator current Q-axis component; calculating a Q-axis armature reaction inductance per unit value and a D-axis armature reaction inductance per unit value based on the datatable parameters of the electrically excited synchronous motor, and converting a rotor no-load excitation current and a rotor full-load excitation current to a stator side to obtain a stator side rotor no-load excitation current and a stator side rotor full-load excitation current; calculating a no-load magnetic flux linkage amplitude and a full-load magnetic flux linkage amplitude based on the stator current D-axis component, the stator current Q-axis component, the stator side rotor no-load excitation current, the stator side rotor full-load excitation current, the D-axis armature reactioninductance per unit value and the Q-axis armature reaction inductance per unit value; and calculating a magnetic flux linkage coefficient based on the no-load flux linkage amplitude and the full-loadflux linkage amplitude. According to the invention, the magnetic flux linkage coefficient can be conveniently and effectively calculated.

Description

technical field [0001] The invention relates to the field of electric excitation synchronous motors, in particular to a method for calculating the flux linkage coefficient of electric excitation synchronous motors. Background technique [0002] With the rapid development of modern industry, the motor has become the main power source of various industrial and mining enterprises, and the performance of its AC speed control system has become more and more perfect, but the existing AC speed control technology is not perfect, and there are still many aspects to be overcome and perfect. Vector control technology, as the main force of AC speed regulation technology, has been applied more and more. [0003] Electric excitation synchronous motors usually adopt air-gap flux-oriented vector control. When using this method, it is necessary to observe the size of the flux linkage in order to perform closed-loop adjustment. A simple and easy-to-use method is to calculate the flux linka...

AI Technical Summary

Problems solved by technology

Then it is necessary to obtain the magnetization curve and demagnetization curve in advance, especially the flux linkage coefficient, and there is no convenient and effective method for calculating the flux linkage coefficient at present.

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