Semi-series hybrid permanent magnet adjustable flux motor with passive magnetic barrier

Abstract

The invention discloses a mid-series type hybrid permanent-magnet adjustable flux motor having passive adjustable flux magnetic barriers, and belongs to the field of permanent-magnet motors, and solves the problem that advantages of serial and parallel hybrid permanent-magnet adjustable flux motors cannot be combined. The mid-series type hybrid permanent-magnet adjustable flux motor comprises a stator iron core, an armature winding, a rotor iron core and a rotating shaft; the rotor iron core is fixed on the rotating shaft, and is positioned inside the stator iron core; the armature winding isarranged on the stator iron core; the mid-series type hybrid permanent-magnet adjustable flux motor further comprises low-coercivity permanent-magnet slots, low-coercivity permanent magnets, radial slots, high-coercivity permanent magnets and the passive adjustable flux magnetic barriers; the low-coercivity permanent-magnet slots and the radial slots are distributed on the rotor iron core alternately and uniformly along a circumferential direction; the low-coercivity permanent-magnet slots and the radial slots are penetrated through the whole motor along an axial direction; the low-coercivitypermanent magnets are installed in the low-coercivity permanent-magnet slots; and the high-coercivity permanent magnets and the passive adjustable flux magnetic barriers are jointly installed in the radial slots.

Description

technical field [0001] The invention relates to a semi-serial hybrid permanent magnet adjustable magnetic flux motor rotor structure with a passive magnetic barrier and belongs to the field of permanent magnet motors. Background technique [0002] The adjustable flux permanent magnet motor adjusts the magnetization level of the low-coercivity permanent magnet online by applying an instantaneous direct-axis demagnetization pulse current in the armature winding, reducing the air gap flux density of the motor, thereby expanding the speed regulation range of the motor, and It can ensure high efficiency when the motor runs at a wide speed. The adjustable flux motor using a single low coercivity permanent magnet has low power density, and a hybrid permanent magnet adjustable flux motor using both low coercivity permanent magnets and high coercivity permanent magnets has emerged as the times require. The arrangement of the two permanent magnets of this type of motor can be divided...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the advantages of series and parallel hybrid permanent magnet adjustable flux motors cannot be taken into account, and to provide a semi-serial hybrid permanent magnet adjustable flux motor with passive magnetic barriers. Advantages of series hybrid permanent magnet adjustable flux motor: increase the power density and overload operation capacity of the motor, and overcome the disadvantages of series hybrid permanent magnet adjustable flux motor with large demagnetization pulse current: reduce the motor required The capacity of the drive controller expands the range of magnetic adjustment

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