Magnetic circuit split type v-type parallel combined magnetic pole adjustable flux motor with double-layer magnetic barrier

Abstract

The invention relates to a magnetic circuit split type V-shaped parallel combined magnetic pole adjustable magnetic flux motor with a double-layer magnetic barrier, belongs to the field of a permanentmagnetic motor and aims to solve a problem that a motor utilizing the high coercive and low coercive permanent magnet combined magnetic pole structure has the function of suppressing demagnetizationof a high coercive permanent magnet is solved. The motor is characterized in that a V-shaped axially-through high coercive permanent magnet slot is disposed under each pole of a rotor core, a pair ofrectangular axially-through low coercive permanent magnet slots are symmetrically disposed under each pole of the rotor core, two slot ports of the high coercive permanent magnet slot are respectivelyconnected with one low coercive permanent magnet slot, two adjacent low coercive permanent magnet slots are parallel under different poles, the rotor core in the enclosed area of the two low coercivepermanent magnet slots and the high coercive permanent magnet slot under the same pole is symmetrically provided with a pair of double-layered arc-shaped magnetic barriers, two long arcs of the adjacent double-layered arc-shaped magnetic barriers under different poles are on the same concave arc, and two short arcs are on the same concave arc.

Description

technical field [0001] The invention belongs to the field of permanent magnet motors and relates to wide speed regulation technology of permanent magnet motors. Background technique [0002] Permanent magnet synchronous motor has become a common drive motor for new energy vehicles due to its advantages of high power density and high efficiency. However, this type of motor has disadvantages such as difficulty in adjusting the permanent magnet magnetic field and low efficiency when the field is weakened. In response to the above problems, scholars have proposed an adjustable flux motor with an adjustable permanent magnet field. This motor can change the magnetization state of the permanent magnet by applying d-axis charging and demagnetizing current pulses, so as to expand the motor speed regulation range. the goal of. Compared with an adjustable flux motor using only one low-coercivity permanent magnet, a motor with a combined pole structure of high-coercivity and low-coerci...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of inhibiting the demagnetization of high-coercivity permanent magnets in motors with a combined pole structure of high-coercivity and low-coercivity permanent magnets, and to provide a magnetic circuit division with double-layer magnetic barriers V-type parallel combined magnetic pole adjustable flux motor, since the motor has placed arc-shaped magnetic barriers above the midpoints of the two permanent magnets under the same pole, the permanent magnets with high coercive force of the motor are opposed to the permanent magnets with low coercive force. The demagnetization effect of the motor is weakened, which reduces the size of the magnetizing current pulse required by the motor, reduces the capacity of the drive controller required by the motor, and expands the load magnetic adjustment multiple; The magnetic flux plays a role of redistribution, which improves the fundamental wave amplitude and sine degree of the no-load air gap flux density of the motor

Images