Consequent pole series magnetic circuit hybrid permanent magnet memory motor

Abstract

The invention discloses a consequent pole series magnetic circuit hybrid permanent magnet memory motor, which comprises a stator, a hybrid permanent magnet rotor and a non-magnetic rotating shaft, and is characterized in that the stator comprises a stator yoke, stator iron core teeth, stator slots and armature windings; the hybrid permanent magnet rotor comprises a rotor iron core, a V-shaped groove, a linear groove, an air magnetic barrier, a first permanent magnet and a second permanent magnet. The first permanent magnet and the second permanent magnet form a series magnetic circuit, the working point of the second permanent magnet can be improved, the magnetic stabilization effect is enhanced, the second permanent magnet is magnetized in the radial direction, and flexible adjustment of air gap flux density can be achieved; a consequent pole design is adopted, and a half of permanent magnetic poles are replaced by iron core poles, so that the torque performance of the motor is maintained, and the flux adjusting current of the motor is effectively reduced by reducing the use amount of direct-axis permanent magnets; short-time current pulses are used for magnetic adjustment, almost no magnetic adjustment copper loss exists, the low-coercivity permanent magnets can be subjected to online repeated magnetic adjustment, and magnetic adjustment control is similar to traditional vector control and easy to achieve.

Description

technical field [0001] The invention belongs to the technical field of electric motors, and in particular relates to an alternating pole series magnetic circuit hybrid permanent magnet memory motor. Background technique [0002] Permanent Magnet Synchronous Machine (PMSM) mostly uses rare earth permanent magnet materials (such as NdFeB), which have the advantages of high power density, high torque density, high efficiency and strong overload capacity. It is widely used in industries such as production and household appliances. [0003] However, due to the inherent characteristics of NdFeB materials, traditional permanent magnet motors have problems such as unadjustable air-gap magnetic field, limited speed adjustment range, and low high-speed operation efficiency. There are technical bottlenecks. In order to solve the problem of non-adjustable air-gap flux density of permanent magnet motors, variable flux permanent magnet motors have become a research hotspot. [0004] Ge...

AI Technical Summary

Problems solved by technology

Parallel magnetic circuit type memory motors have a large range of magnetic adjustment, but low-coercivity permanent magnets are prone to load demagnetization problems; The magnetic current is large, which increases the capacity requirements of the inverter

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