Vehicle permanent magnetic synchronous motor and stator iron core capable of weakening magnetic resistance moment

Abstract

The invention relates to a vehicle permanent magnetic synchronous motor, wherein radial magnetized magnet steels are uniformly inlaid in the circumferential direction of the inside of a rotor iron core, the magnet steels and a pole shoe form a permanent magnetic pole, a fan-shaped cavity is arranged at the inside of the pole shoe, a cambered conductive starting strip and a resin filling are respectively arranged at the outer margin and the inside of the cavity, and the structure can prevent the permanent demagnetization of the magnet steels due to static and dynamic armature reactions, improve starting torque and peak torque, reduce rotor inertia and centrifugal force and improve fast response capability; a stator iron core applied to the synchronous motor is formed by sequentially overlying three layers of iron cores with different stator punching sheet tooth surfaces, wherein the first layer of iron core comprises a stator punching sheet of which the tooth surface is rightwards moved at a theta angle, the second layer of iron core comprises the stator punching sheet of which the tooth surface is leftwards and rightwards moved at a theta / 2 angle, the third layer of iron core comprises the stator punching sheet of which the tooth surface is leftwards moved at the theta angle, the tooth surfaces of the three layers of iron cores are overlaid to form a skewed tooth, and the structure can weaken the magnetic resistance moment, inhabit tooth slot moment fluctuation and avoid the defect of an iron core skewed slot.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a permanent magnet synchronous motor for vehicles and a stator core capable of weakening magnetic resistance torque. Background technique [0002] The current sustainable development of the automobile industry is facing two major problems: environmental pollution and lack of oil resources. Exhaust pollution, noise, fire hazards of fuel storage and other issues of automobiles have attracted more and more attention. Environmental protection and energy saving are an important development direction of automobile technology in the 21st century. Electric vehicles have become a new generation of clean energy vehicles. Among them, the drive motor and transmission system are the heart of the electric vehicle, and the motor is the core of the drive system. The comprehensive performance of the motor directly affects the performance of the electric vehicle. At present, the drive motor for el...

AI Technical Summary

Problems solved by technology

[0003]At present, the permanent magnet brushless DC motor (PMBLM) is being developed at home and abroad, and its armature excitation is a "non-circular jumping" rotating magnetic field, which has a large Torque fluctuations affect the motor's high efficiency, high precision, high speed and smooth operation

However, during the use of the existing permanent magnet brushless DC motor, since the armature reaction flux cannot be prevented from rising, the system overcurrent protection device does not have enough time to operate, so that the static and dynamic armature reaction will permanently remove the magnetic steel. Magnetic, which reduces the starting torque and peak torque; in addition, because the existing stator core used in synchronous motors cannot weaken the reluctance torque and suppress the fluctuation of cogging torque, the disadvantage of the iron core chute cannot be avoided

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