Salient pole electromagnetic and permanent magnet invisible magnetic pole hybrid excitation drive motor

Abstract

The invention provides a salient pole electromagnetic and permanent magnet invisible magnetic pole hybrid excitation drive motor and belongs to the technical field of electromobile motor electrical appliances. The motor is composed of a front end cover, a rear end cover, a motor shell, a rotator and a stator, rectangular permanent magnet steel is embedded into a radial rectangular groove, tile permanent magnet steel is embedded into a circular arc groove, the situation that permanent magnet steel generates irreversible demagnetization under the action of an armature reaction of an impact current can be effectively prevented, it is guaranteed that permanent magnet steel is free of loss of excitation, a magnetic field in an air gap of the drive motor is jointly provided by the permanent magnet steel and an electric excitation winding, the generated magnetic field directly faces an air gap, and less leakage flux is generated.

Description

technical field [0001] The invention provides a salient pole electromagnetic and permanent magnet invisible magnetic pole hybrid excitation drive motor, which belongs to the technical field of electric vehicle motors and appliances. Background technique [0002] At present, the rotors of the permanent magnet drive motors used in electric vehicles mostly adopt the permanent magnet external embedded structure, such as the existing technology, patent name: brushless DC motor rotor, patent number: ZL200920116549.1, discloses the following technical solutions, including the rotor Iron core, rotating shaft and permanent magnet. The rotor iron core is composed of punched sheets and connected together. The rotating shaft and the rotor iron core are fixedly connected. There are even numbers of T-shaped wedges evenly distributed on the outer surface of the rotor iron core. Adjacent T-shaped wedges Slots are formed between the blocks, and the permanent magnets are correspondingly embed...

AI Technical Summary

Problems solved by technology

[0002] At present, the rotors of the permanent magnet drive motors used in electric vehicles mostly adopt the permanent magnet external embedded structure, such as the existing technology, patent name: brushless DC motor rotor, patent number: ZL200920116549.1, discloses the following technical solutions, including the rotor Iron core, rotating shaft and permanent magnet. The rotor iron core is composed of punched sheets and connected together. The rotating shaft and the rotor iron core are fixedly connected. There are even numbers of T-shaped wedges evenly distributed on the outer surface of the rotor iron core. Adjacent T-shaped wedges Slots are formed between the blocks, and the permanent magnets are correspondingly embedded in the slots. The permanent magnets of the rotor with this structure directly face the air gap. Under the action of the armature reaction of the impact current, irreversible demagnetization may occur. Once the permanent magnets form irreversible demagnetization, The efficiency of the driving motor is reduced, and the power and torque drop rapidly, and its performance needs to be further improved

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