Hybrid excitation synchronous motor efficiency optimized control method

Abstract

The invention discloses a hybrid excitation synchronous motor efficiency optimized control method. In the condition that motor output torque and rotation speed are satisfied, d shaft, q shaft and excitation winding current are controlled, thus iron consumption and copper consumption of a hybrid excitation synchronous motor are minimal, the optimized efficiency of the hybrid excitation synchronous motor is achieved, and the motor efficiency is raised. When the motor runs in a low speed area, according to the size of a load, and through the d shaft, q shaft and excitation winding current coordinated control, the sum of iron consumption and copper consumption is minimal. When the motor runs in a high speed area, by using d shaft current and excitation winding current common flux weakening, through the d shaft, q shaft and excitation winding current coordinated control, the iron consumption and copper consumption of the motor are minimal, and the optimal efficiency of a hybrid excitation synchronous motor is achieved. According to the hybrid excitation synchronous motor efficiency optimized control method, the motor loss is reduced, the efficiency of energy use is raised, and the energy saving effect is achieved.

Description

technical field [0001] The invention belongs to the technical field of electric transmission, and relates to a current distribution strategy, in particular to a control method for a hybrid excitation synchronous motor. Background technique [0002] Hybrid excitation synchronous motor is a kind of wide speed regulation motor developed on the basis of permanent magnet synchronous motor and electric excitation synchronous motor. Its main purpose is to solve the problem that the air gap magnetic field of permanent magnet synchronous motor is difficult to adjust. The hybrid excitation synchronous motor has two excitation sources, one is permanent magnet and the other is electric excitation. The magnetic potential generated by the permanent magnet is the main magnetic potential, and the magnetic potential generated by the excitation winding is the auxiliary magnetic potential. This motor combines the advantages of permanent magnet synchronous and electric excitation synchronous mo...

AI Technical Summary

Problems solved by technology

Compared with the id=0 control, the copper loss minimum control improves the efficiency of the hybrid excitation synchronous motor, but does not consider the iron loss of the motor, and the iron loss of the hybrid excitation synchronous motor is a larger part of the loss, so in this control method, the stator current of the motor is still not optimal, and the efficiency of the motor is still not optimized

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