Stator Partition Alternating Pole Hybrid Excitation Motor

Abstract

The invention discloses a stator-partition type consequent-pole hybrid excitation motor which comprises armature windings, exciting windings, permanent magnets, a stator where the armature windings are located, a rotor and a stator where the exciting windings are located. The stator where the armature windings are located and the stator where the exciting windings are located are respectively disposed on both sides of the rotor. When the stator where the armature windings are located is the outer stator, the stator where the excitation windings are located is the inner stator; and when the stator where the excitation windings are located is the outer stator, the stator where the armature windings are located is the inner stator. The number of teeth of the stator where the armature windingsare located is Nst, and the number of teeth of the stator where the field windings are located is Nst / 3. The tooth tips of the stator teeth where the exciting windings are located face the rotor direction, and the tooth tip of the stator tooth where each exciting winding is located has one or two permanent magnet poles, and the number of poles formed is three; and the magnetizing directions of the permanent magnets of the stator teeth where the adjacent exciting windings are located are reversed. The motor of the invention solves the problem of space restriction on the permanent magnets and the armature windings, and meanwhile realizes effective adjusting of air-gap fields through setting the set of exciting windings on the stator.

Description

technical field [0001] The invention relates to the field of motor manufacturing, in particular to a stator partition type alternating pole hybrid excitation motor. Background technique [0002] Permanent magnet motors have the characteristics of simple structure, high efficiency and high power density, and have been widely used in home appliances, electric vehicles, wind power generation, aerospace and other occasions. [0003] According to the placement of permanent magnets, permanent magnet motors can be divided into rotor permanent magnet type and stator permanent magnet type. The stator permanent magnet motor is a research hotspot in recent years. Its permanent magnets and armature windings are located on the stator, while the rotor has neither windings nor permanent magnets. Because of its simple structure, reliable operation, easy heat dissipation, and also has the advantages of high power density, high efficiency, good fault tolerance and strong load capacity, it ha...

AI Technical Summary

Problems solved by technology

[0006] However, because the permanent magnet magnetic field is a constant magnetic field, the stator partitioned permanent magnet motor also faces an inherent problem of the permanent magnet motor, that is, the limited magnetic adjustment capability

This makes the constant power operating range of this type of motor limited

Although vector control can be used to weaken the air-gap magnetic field by applying a negative direct-axis current component (-id) in the armature winding, the speed range is very limited due to the limitation of the armature current and inverter capacity. limit, and the efficiency and power factor in the field-weakening speed-up zone are low

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