Stator partitioned alternating current excitation type hybrid excitation brushless motor based on hybrid pole rotor

Abstract

The invention discloses a stator partitioned alternating-current excitation type hybrid excitation brushless motor based on a hybrid pole rotor. The stator partitioned alternating-current excitation type hybrid excitation brushless motor comprises an outer stator, the hybrid pole rotor, an inner stator, an armature winding and an alternating-current excitation winding, the outer stator, the mixed pole rotor and the inner stator are sequentially and coaxially arranged from outside to inside, a main air gap is formed between the mixed pole rotor and the outer stator, and an auxiliary air gap is formed between the mixed pole rotor and the inner stator; the armature winding is wound in a stator slot of the outer stator, and the number of pole pairs of the armature winding is equal to p; the alternating-current excitation winding is wound in a stator slot of the inner stator, the number of pole pairs of the alternating-current excitation winding is equal to i, and p is equal to 3i or p is equal to 5i, wherein i is a positive integer; and the mixed pole rotor can generate p-order harmonic waves and i-order harmonic waves in a main air gap. According to the invention, the space utilization rate and the power density can be effectively improved; the excitation magnetomotive force of each pole acts on a plurality of iron core poles at the same time; and the utilization rate and the magnetic regulation efficiency of the alternating-current excitation winding are effectively improved.

Description

technical field [0001] The invention relates to the field of motor design and manufacture, in particular to a stator partition AC excitation hybrid excitation brushless motor based on a mixed pole rotor. Background technique [0002] Due to the advantages of high torque / power density, high efficiency, and high power factor, permanent magnet motors are not only widely used in industrial fields and home appliances, but also very competitive in electric vehicles, marine propulsion, and aerospace. [0003] However, field weakening of PM motors is achieved by controlling the direct axis current component in the armature winding (- i d ) to achieve, the permanent magnet has the risk of irreversible demagnetization, and the weakening capacity is limited. Moreover, when the permanent magnet motor is applied to power generation occasions such as ships or aviation power sources, a full-power controllable converter is required to realize voltage regulation, which increases the weight...

AI Technical Summary

Problems solved by technology

The brushless design of the DC excitation hybrid excitation motor usually requires the use of a three-dimensional magnetic circuit or a rotary rectifier, which has a complex structure, and the rotary rectifier has poor adaptability at high speed and high temperature

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