Electric automobile electromagnetic and built-in permanent magnet combined magnetic pole hybrid excitation driving motor

Abstract

The invention provides an electric vehicle electromagnetic and built-in permanent magnet combined magnetic pole hybrid excitation drive motor, which belongs to the technical field of electric vehicle motors and appliances. It is composed of a front end cover, a rear end cover, a casing, a rotor, and a stator. The rectangular permanent magnet steel is respectively embedded in the first rectangular slot and the second rectangular slot, which can effectively prevent the permanent magnet steel from being affected by the armature reaction of the impact current. Irreversible demagnetization is generated to ensure that the permanent magnet steel does not lose its magnetism. The magnetic field in the air gap of the drive motor is provided by the permanent magnet steel and the electric excitation winding, with high magnetic field strength and high output power.

Description

technical field [0001] The invention provides an electric vehicle electromagnetic and built-in permanent magnet combined 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 correspo...

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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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