Tangential and radial resultant magnetic field embedded permanent magnet rotor driving motor

Abstract

The invention provides a tangential and radial resultant magnetic field embedded permanent magnet rotor driving motor, and belongs to the technical field of automobile motor electric appliances. The tangential and radial resultant magnetic field embedded permanent magnet rotor driving motor is composed of a front end cover, a rear end cover, a shell, a rotor and a stator. Pieces of rectangular permanent magnet steel are embedded into tangential rectangular grooves and radial rectangular grooves of a rotor iron core respectively. Due to the fact that the tangential and radial resultant magnetic field embedded permanent magnet rotor driving motor is of a rotor magnetic bypass structure, the problem that irreversible demagnetization is generated when the permanent magnet steel bears excessively-high temperature or the action of the armature reaction of an impact current can be effectively avoided, it is ensured that demagnetization does not happen on the permanent magnet steel, the magnetic field of the rotor of the driving motor is supplied by both the tangential magnetic field and the radial magnetic field, the magnetic field intensity is large, output power is high, an electro-magnetic winding is not required, power consumption is little, a carbon brush and a mechanical diverter are omitted, the failure rate is low, and the tangential and radial resultant magnetic field embedded permanent magnet rotor driving motor has the advantages of being high in efficiency and power density, compact in structure, reliable in work and the like.

Description

technical field [0001] The invention provides a tangential and radial synthetic magnetic field embedded permanent magnet rotor drive motor, which belongs to the technical field of automobile motors and electrical appliances. Background technique [0002] At present, most of the driving motors used with electric vehicles are DC motors with carbon brushes and mechanical commutators. Although DC motors have simple structure, high controllability, wide speed range, relatively simple control circuit, and low cost, but Since the magnetic field of the DC drive motor is generated by the electric excitation winding, the power consumption is large and the output power is small. In addition, due to the existence of carbon brushes and mechanical commutators, it not only limits the improvement of the overload capacity and speed of the drive motor, but also if it runs for a long time, it is bound to Frequent maintenance and replacement of carbon brushes and commutators is required, so the...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the driving motors used with electric vehicles are DC motors with carbon brushes and mechanical commutators. Although DC motors have simple structure, high controllability, wide speed range, relatively simple control circuit, and low cost, but Since the magnetic field of the DC drive motor is generated by the electric excitation winding, the power consumption is large and the output power is small. In addition, due to the existence of carbon brushes and mechanical commutators, it not only limits the improvement of the overload capacity and speed of the drive motor, but also if it runs for a long time, it is bound to Frequent maintenance and replacement of carbon brushes and commutators is required, so the DC motor consumes a lot of energy and has a high failure rate, and its performance needs to be further improved

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