Rotor magnetic pole modulation type variable magnetic flux memory motor

Abstract

The invention discloses a rotor magnetic pole modulation type variable flux memory motor, which comprises a stator, a magnetic pole modulation type rotor, a static magnetic conductive ring and a direct current pulse winding, the magnetic pole modulation type rotor comprises an S low coercive force module and an N low coercive force module; the S low-coercive-force module comprises an S low-coercive-force permanent magnet pole, an S solid yoke part and an S end part extension magnetic conductive ring; the N low-coercive-force module comprises N low-coercive-force permanent magnet poles, N solid yoke parts and N end extension magnetic conductive rings; the S low-coercive-force permanent magnet pole and the N low-coercive-force permanent magnet pole each comprise an arc-shaped rotor iron core lamination, a high-coercive-force permanent magnet and a low-coercive-force permanent magnet; the arc-shaped rotor core laminations are formed by laminating laminations along the axial direction; and a direct-current pulse winding is wound in the static magnetic conductive ring, and an air gap is formed between the static magnetic conductive ring and the rotating body. The rotor is provided with two magnetic poles, namely a low-coercive-force permanent magnet pole and a high-coercive-force permanent magnet pole. The magnetic pole array meets the principle of rotor magnetic pole modulation, and a bypass is adopted to realize brushless power supply of the direct-current 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 variable 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 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. [0003] The hybrid excitation motor ...

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

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