Electromagnetic and permanent magnet parallel magnetic circuit mixed excitation driving motor of electric automobile

Abstract

The invention provides an electromagnetic and permanent magnet parallel magnetic circuit mixed excitation driving motor of an electric automobile and belongs to the technical field of electric automobile motor devices. The electromagnetic and permanent magnet parallel magnetic circuit mixed excitation driving motor is composed of a front end cover, a rear end cover, a housing, a mixed excitation rotor and a stator. Rectangular permanent magnet steel is installed in first rectangular slots and second rectangular slots. The rotor of the driving motor is the electromagnetic and permanent magnet parallel magnetic circuit mixed excitation rotor. The magnetic field in an air gap of the driving motor is provided by the permanent magnet steel and electric exciting windings together, the generated magnetic field directly faces the air gap, the magnetic leakage is low, and the output power is high.

Description

technical field [0001] The invention provides an electric vehicle electromagnetic and permanent magnet parallel magnetic circuit 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 correspondingl...

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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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