Multi-carnassial-tooth-ratio multi-port magnetic field modulation motor

Abstract

The invention discloses a multi-carnassial-tooth-ratio multi-port magnetic field modulation motor which is composed of stators with different carnassial tooth ratios, an inner rotor and an outer rotor, wherein the stators are provided with annular windings, the stators are electric ports, and the inner rotor and the outer rotor are two mechanical ports. The motor stator is applied between an inner rotor and an outer rotor, and stator teeth are used for modulating inner and outer air-gap magnetic fields. The number of stator inner teeth is smaller than that of stator outer teeth, stator tooth flux leakage is small, and the iron core utilization rate is high. Annular windings are embedded into inner and outer grooves of the stator and are connected across a stator yoke, the annular windings with three-phase sine alternating current can provide armature magnetic fields with different pole pair numbers for inner and outer air gaps, and the pole pair number of an outer armature magnetic field is higher than that of an inner armature. The motor has the characteristics of double-speed output, large torque and wide operation range, is good in heat dissipation performance, high in power factor and low in copper consumption, and is suitable for occasions with low-speed, large-torque and multi-speed operation requirements, such as electric automobiles and all-electric aircrafts.

Description

technical field [0001] The invention relates to a permanent magnet magnetic field modulation motor, in particular to a multi-split gear ratio multi-port magnetic field modulation motor. Background technique [0002] With the improvement of the performance of permanent magnet materials and the expansion of its industrial application prospects, permanent magnet motors have replaced traditional electric excitation motors and are widely used in aerospace, navigation, transportation and other fields due to their advantages of high efficiency, high power density and reliable operation. In engineering, most permanent magnet motor drive systems use a combination of "high-speed motor + mechanical gear" to increase the torque density of the motor. However, such a combination brings about a series of problems such as increased friction loss, increased noise, reduced efficiency, and reduced operational reliability. In order to solve these problems, motor researchers combined magnetic g...

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Problems solved by technology

[0003] However, the traditional magnetic field modulation motor consists of a set of windings and a stator to drive a rotor to rotate, which is difficult to apply to multi-port differential output occasions. In order to solve this problem, the researchers proposed to introduce an additional modulation ring on two In the middle of the rotor, the two rotors are rotated by the magnetic field modulation of the magnetic ring

However, the introduction of an additional magnetic ring increases the number of air gaps in the structure, and its space utilization rate is low and the harmonic distortion is large, resulting in low operating efficiency of the motor; in response to this problem, the researchers proposed a dual-rotor magnetic field modulation Motor, the motor adopts the structure of upper and lower slots, the number of single inner and outer stator teeth is fixed and equal, and the output capacity of the two mechanical ports is the same, so the application range is limited

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