Claw-pole electromagnet and built-in permanent magnet hybrid excitation driving motor for electric automobile

Abstract

The invention provides a claw-pole electromagnet and built-in permanent magnet hybrid excitation driving motor for an electric automobile, and belongs to the technical field of motors and electric appliances for electric automobiles. The driving motor is composed of a front end cover, a rear end cover, a motor shell, a rotor and a stator, rectangular permanent magnet steel parts are embedded in radial rectangular grooves, and tile permanent magnet steel parts are embedded in circular-arc-shaped grooves; irreversible demagnetization, produced under the armature reaction action of an impact current, of the permanent magnet steel parts can be effectively prevented, it is guaranteed that the permanent magnet steel parts do not lose magnetism, a magnetic field in air gaps of the driving motor is provided by the permanent magnet steel parts and electric exciting windings jointly, the magnetic field intensity is large, and the output power is high.

Description

technical field [0001] The invention provides an electric vehicle claw pole electromagnetic and embedded permanent magnet 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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