Brushless electromagnetic and invisible magnetic pole composite excitation driving motor

Abstract

The invention provides a brushless electromagnetic and invisible magnetic pole composite excitation driving motor, and belongs to the technical field of electric automobile motor and electric appliances. The brushless electromagnetic and invisible magnetic pole composite excitation driving motor is composed of a front end cover, a rear end cover, a housing, a rotor and a stator. Rectangular permanent magnet steel is embedded in radial rectangular slots, and tile permanent magnet steel is embedded in arc-shaped slots. The permanent magnet steel is effectively prevented against irreversible demagnetization under the effect of an armature reaction of an impact current, and the permanent magnet steel is prevented against excitation loss; a magnetic field in an air gap of the driving motor is provided by the permanent magnet steel and electric excitation windings together, the generated magnetic field directly faces the air gap, and the magnetic leakage is low.

Description

technical field [0001] The invention provides a brushless electromagnetic and invisible magnetic pole composite 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 embedded in the slots....

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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