Biradial permanent magnet and brushless electromagnetic hybrid excitation drive motor

Abstract

The invention provides a biradial permanent magnet and brushless electromagnetic hybrid excitation drive motor, and belongs to the technical field of electric car motor appliances. The drive motor consists of a front end cover, a rear end cover, a motor case, a rotor, and a stator. Rectangular permanent magnet steels are respectively embedded into a first rectangular groove and a second rectangular groove. The drive motor can effectively prevent the permanent magnet steels from causing irreversible demagnetization under the action of armature reaction of an impact current, and guarantees that the permanent magnet steels are not demagnetized. A magnetic field in a gap of the drive motor is provided by the permanent magnet steels and an excitation winding, and is high in intensity. The output power is high.

Description

technical field [0001] The invention provides a dual-radial permanent magnet and brushless electromagnetic 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 embedded in the slot...

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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