Integrated DC Induction Hybrid Excitation Brushless Motor Based on Alternating Pole Rotor

Abstract

The invention discloses an integrated DC induction hybrid excitation brushless motor based on an alternating pole rotor, including a stator, a rotor, an armature winding, an induction excitation winding, a main excitation winding and an induction armature winding; the armature winding and the induction excitation winding are all wound in the stator slot of the stator; the induction excitation winding is connected to the DC voltage source through a DC converter; the rotor is evenly equipped with P / 2 permanent magnet poles along the circumferential direction; Three core poles are formed between the magnetic poles; the main excitation winding and the induction armature winding are both wound in the rotor slot; the main excitation winding is connected with the induction armature winding through a rotating rectifier. The invention utilizes the inherent characteristics of the alternating pole rotor, thereby having high magnetic regulation efficiency. At the same time, the induction winding and rotating rectifier are combined to realize the brushless power supply of the main excitation winding on the rotor, and the core pole with high magnetic permeability also provides a low reluctance path for the magnetic flux generated by the induction excitation winding to improve the induction efficiency.

Description

technical field [0001] The invention relates to the field of motor design and manufacture, in particular to an integrated DC induction hybrid excitation brushless motor based on an alternating pole rotor. Background technique [0002] Permanent magnet motors have the advantages of high torque / power density, high efficiency, and high power factor, and have been used in many applications such as household appliances and electric vehicles. However, in the case of driving in a wide speed range, the permanent magnet motor is controlled by the direct axis current component in the armature winding (- i d ) to realize the field-weakening expansion, which increases the risk of irreversible demagnetization of the permanent magnet, and the high reluctance characteristics of the permanent magnet limit the field-weakening capability. In the case of constant voltage power generation, the permanent magnet motor needs a full-power controllable converter to stabilize the output voltage. ...

AI Technical Summary

Problems solved by technology

Although the additional magnetic circuit provides a low reluctance path for electrical excitation, it also provides a flux leakage (flux leakage: flux that does not pass through the air gap and stator tooth closure) path for the permanent magnet flux, reducing the utilization of permanent magnet materials Rate

Moreover, most of the additional magnetic circuits are solid magnetic conductive parts, which increases the eddy current loss

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