Wide range speed control system and current distribution method for hybrid excitation synchronous machine

Abstract

The invention discloses a wide range speed control system and current distribution method for a hybrid excitation synchronous machine. A control policy is applied to armature drive and excitation drive simultaneously. When the motor is in the starting period, a rated forward magnetism strengthening current is applied to the exciting winding to increase the starting torque of the motor, so that the motor obtains electromagnetic torque exceeding the rated torque under the condition of no overcurrent, and the transition time of motor starting is shortened. When the motor is in the low speed operating interval, if the motor load exceeds the rated load, the electromagnetic torque of the motor is increased by applied the forward magnetism strengthening current, so that the motor obtains excessive loading capacity under the condition of no overcurrent and no overheat. When the motor operates at high speed, a constant power operating interval far above the rated rotating speed can be obtainedby applying an appropriate reverse exciting current to HESM (Hybrid Excitation Synchronous Machine) and performing weak magnetic regulation on the d-axis armature current.

Description

technical field [0001] The invention belongs to the field of motor control, and in particular relates to a control system of a hybrid excitation synchronous motor (HESM), and proposes a method for how to distribute current in the control system. Background technique [0002] HESM is developed on the basis of permanent magnet synchronous motor and electric excitation synchronous motor, and contains two magnetic potential sources of permanent magnet magnetic potential and electric excitation magnetic potential. 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. Therefore, this kind of motor not only has the characteristics of high efficiency and large torque / mass ratio of permanent magnet synchronous motor, but also has the advantages of convenient magnetic adjustment and large magnetic adjustment capacity of electric excitation synchronous ...

AI Technical Summary

Problems solved by technology

However, relatively little research has been done on drive systems for such motors

At present, most of the existing literature is researched from the perspective of control theory and dynamic simulation, and no complete optimal efficiency control scheme based on vector control has been systematically given from the aspects of software and hardware design. There is no related HESM in China. Patent disclosure of control system design

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