Integrated direct-current induction hybrid excitation brushless motor based on consequent-pole rotor

Abstract

The invention discloses an integrated direct-current induction hybrid excitation brushless motor based on a consequent-pole rotor. The integrated direct-current induction hybrid excitation brushless motor comprises 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 wound in a stator groove of the stator; the induction excitation winding is connected with a direct-current voltage source through a direct-current converter; the rotor is uniformly provided with P / 2 permanent magnet poles along the circumferential direction; P is the number of pole pairs of the motor; three iron core poles are formed between two adjacent permanent magnet poles; the main excitation winding and the induction armature winding are wound in a rotor groove; and the main excitation winding is connected with the induction armature winding through a rotary rectifier. By utilizing the inherent characteristics of the consequent-pole rotor, the motor has high magnetic adjustment efficiency. Meanwhile, the brushless power supply of the main excitation winding on the rotor is realized by combining the induction winding and the rotary rectifier, and the iron core pole with high magnetic conductance also provides a low magnetic resistance path for the magnetic flux generated by the induction excitation winding, so that the induction efficiency is improved.

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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