Control device, control method and system for DC biased hybrid excitation motor

Abstract

The invention discloses a control device of a DC bias type hybrid excitation motor, a control method and a system thereof, comprising: a speed sensor, a current sensor, a second rotating coordinate conversion module, a speed regulator, a MTPA module, a current regulator, a first rotating coordinate conversion module, a pulse width regulation module and a dual three-phase converter. The MTPA moduleis used for calculating the d, q, 0 axis current setting values according to the armature current setting values. The current regulator is used for converting each current set value into a corresponding voltage set value; the current regulator is used for converting each current set value into a corresponding voltage set value. The first rotational coordinate conversion module is configured to convert the d, q axis voltage set values into alpha, beta axis voltage set values. The pulse width regulating module is used for generating PWM signals according to the given values of the alpha, beta and zero axes to drive the dual three-phase converters, and controlling each phase winding of the six-phase direct current bias hybrid excitation motor by the current of each bridge arm of the dual three-phase converters. The invention can solve the problems of insufficient carrying capacity of the existing hybrid excitation motor and complex calculation of MPTA control parameters.

Description

technical field [0001] The invention belongs to the field of AC motor and drive control, and more specifically relates to a control device, a control method and a system of a DC bias hybrid excitation motor. Background technique [0002] Hybrid excitation motor combines the advantages of permanent magnet motor and electric excitation motor, and has the advantages of high power density, high efficiency, and strong flux adjustment ability. However, the traditional hybrid excitation motor has two sets of windings, the field winding and the armature winding, which increases the stator resistance, thereby increasing the stator voltage drop and copper loss, which affects the load capacity and motor efficiency at low speeds. The DC bias hybrid excitation motor connects the field winding and the armature winding in parallel, so that the stator resistance is reduced to half of the original value, so the voltage drop of the stator resistance can be reduced, and the torque output of th...

AI Technical Summary

Problems solved by technology

[0009] Aiming at the defects and improvement needs of the prior art, the present invention provides a control device, control method and system of a DC bias hybrid excitation motor, aiming to solve the problem of insufficient load capacity of the existing hybrid excitation motor and the calculation of MPTA control parameters. complicated question

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