Motor rotor, reluctance motor and electric vehicle

Abstract

The invention provides a motor rotor, a reluctance motor and an electric vehicle. The motor rotor comprises a rotor core (1), and the rotor core (1) comprises a plurality of magnetic barrier groups. Each magnetic barrier group comprises at least two magnetic flux barriers (2); magnetic conduction channels (3) are formed between the adjacent magnetic flux barriers (2); permanent magnets (4) are arranged in the magnetic flux barriers (2); and, under the same pole, the pole arc field angle of the flux barrier (2) on the innermost side in the radial direction at the front edge of the D-axis rotation direction is psi; the pole arc opening angle of the radially innermost magnetic flux barrier (2) located at the rear edge of the D-axis rotation direction is psi1, the pole arc opening angle of theradially outermost magnetic flux barrier (2) located at the front edge of the D-axis rotation direction is xi, and the pole arc opening angle of the radially outermost magnetic flux barrier (2) located at the rear edge of the D-axis rotation direction is xi1, wherein psi> psi1, and xi> xi1. According to the motor rotor, the flux density of the leading-edge magnetic conduction channel can be reduced, local magnetic flux leakage is reduced, and the output torque of the motor is improved.

Description

technical field [0001] The present application relates to the technical field of motor equipment, in particular to a motor rotor, a reluctance motor and an electric vehicle. Background technique [0002] With the development of motor technology, in addition to asynchronous motors and rare earth permanent magnet motors, many new motors have emerged in the motor industry. The synchronous reluctance motor uses the principle of minimum reluctance that the magnetic flux always closes along the path of minimum reluctance, and alternately arranges multi-layer magnetic conduction channels and air magnetic barriers in the rotor to form the inductance difference between the d-axis and the q-axis, thereby generating Torque works, but because there is no permanent magnet excitation, it is difficult to control the synchronous reluctance motor, and the motor performance cannot be compared with the rare earth permanent magnet motor. The permanent magnet assisted synchronous reluctance mot...

AI Technical Summary

Problems solved by technology

At the same time, to increase the output torque of the motor as much as possible, the end of the magnetic steel slot is often bent to increase the pole arc angle. The flux density of the magnetic channel is relatively small, and it is not easy to saturate, which makes the permanent magnet assisted synchronous reluctance motor easy to saturate at the front position of the rotation direction, resulting in serious magnetic flux leakage at the front, reducing the overall output torque of the motor

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