A Rotor Pole Modulation Type Variable Flux Memory Motor

Abstract

The invention discloses a rotor magnetic pole modulation type variable magnetic flux memory motor, which comprises a stator, a magnetic pole modulation type rotor, a static magnetic conducting ring and a DC pulse winding; the magnetic pole modulation type rotor comprises an S low coercive force module and an N low coercivity module. Coercivity module; S low coercivity module includes S low coercivity permanent magnet pole, S solid yoke and S end extended magnetic permeable ring; N low coercivity module includes N low coercivity permanent magnet pole, N solid yoke Both the S low coercivity permanent magnet pole and the N low coercivity permanent magnet pole include arc-shaped rotor core laminations, high coercivity permanent magnets and low coercivity permanent magnets; arc-shaped The rotor core lamination is formed by lamination along the axial direction; DC pulse windings are wound around the static magnetic conductive ring, and there is an air gap between the rotor and the rotating body. There are two types of magnetic poles on the rotor of the present invention: low-coercivity permanent magnet poles and high-coercivity permanent magnet poles. The magnetic pole array satisfies the principle of rotor magnetic pole modulation, and adopts the bypass to realize the brushless power supply of the DC pulse winding.

Description

technical field [0001] The invention relates to the field of motor design and manufacture, in particular to a rotor magnetic pole modulation type variable magnetic flux memory motor. 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 occasions such as household appliances and electric vehicles. However, in wide speed range driving applications, the permanent magnet motor is driven by controlling the direct axis current component in the armature winding (- i d ) to realize the weak field expansion, which increases the risk of irreversible demagnetization of the permanent magnet, and the high reluctance characteristic of the permanent magnet limits the field weakening ability. In the case of constant voltage power generation, the permanent magnet motor needs a full-power controllable converter to achieve the stability of the output voltage. [0003] The hyb...

AI Technical Summary

Problems solved by technology

[0004] However, when the hybrid excitation motor works in the hybrid excitation mode (field increase or field weakening), a continuous excitation current must be applied to the field winding, which will inevitably increase the copper loss of the motor and reduce the efficiency of the motor

Images