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A brushless DC motor for an electric vehicle

A brushed DC motor and electric vehicle technology, applied in the field of electric vehicles, can solve the problem of large commutation torque ripple, and achieve the advantages of reducing commutation torque ripple, high fault-tolerant operation capability and reliability, and avoiding the spread of faults. Effect

Active Publication Date: 2019-04-30
JIANGSU SANJIANG DISHENG MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problems of large commutation torque pulsation of traditional reluctance motors and provide a four-phase high-reliability motor with adjustable magnetic field, the present invention adopts the following technical solutions:

Method used

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  • A brushless DC motor for an electric vehicle
  • A brushless DC motor for an electric vehicle
  • A brushless DC motor for an electric vehicle

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Embodiment Construction

[0032] The accompanying drawings disclose, without limitation, the structural schematic diagrams of the preferred embodiments involved in the present invention; the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0033] figure 1 It is a structural schematic diagram of a brushless DC motor for an electric vehicle according to the present invention. The brushless DC motor of an electric vehicle comprises a stator core (1), a rotor core (2), an excitation winding (5), a permanent magnet (6), an armature winding (4) and a shaft (3), which is an inner rotor structure, The rotor core (2) is fixed on the shaft (3), and there are 11k uniformly distributed convex rotor poles on the rotor core (2), where k is a positive integer. In this embodiment, k=1.

[0034] The stator core (1) has 12k convex stator poles, the 12k stator poles are divided into 6k pairs of parallel stator poles, and the centerlines of th...

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Abstract

The invention discloses an electric vehicle brushless DC motor, belonging to the electric vehicle technology field. The electric vehicle brushless DC motor comprises a stator iron core, a rotor iron core, an excitation winding, a permanent magnet, an armature winding and a shaft. The electric vehicle brushless DC motor is characterized in that the brushless DC motor is an internal rotor structure; The stator iron core has 12k protruded stator poles, wherein k is an integer; the 12k stator poles include 6k pairs of parallel stator poles; center lines of the two stator poles on a pair of parallel stator poles are parallel; an armature groove is arranged between two stator polesof a pair of parallel stator poles; an excitation groove is arranged between two adjacent parallel stators; a recess which is recessed along a circumferential direction is formed on the bottom of the excitation groove; an excitation winding is wound on each pair of the parallel stators; and a concentrated armature winding is wound on each stator pole. The excitation winding and the armature winding are isolated from each other and the counterelectromotive force is a sine wave, which effectively reduces the torque ripple of the traditional magnetic resistance kind motor.

Description

technical field [0001] The invention relates to a brushless DC motor of an electric vehicle, which belongs to the technical field of electric vehicles. Background technique [0002] At present, the permanent magnet brushless DC motor uses semiconductor devices to replace the mechanical commutator in the brushed DC motor. It has a simple structure, reliable operation, no sparks, and low electromagnetic noise. It has a wide range of applications in small and medium power electric vehicles. The stator windings of brushless DC motors are mostly made into a three-phase symmetrical star connection, and the back EMF is mostly a square wave, so it can be driven by DC after commutation through the inverter. [0003] In related research, the authorized Chinese invention patent: ZL200510093634.7 for fractional slot winding of low-speed high-torque permanent magnet brushless motor involves the number of magnetic poles P, the number of iron core slots Z, the number of phases M and the nu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K29/03H02K3/12H02K1/16H02K1/17
CPCH02K1/165H02K1/17H02K3/12H02K29/03Y02T10/64
Inventor 史立伟韩永伟王可郭盈志张学义
Owner JIANGSU SANJIANG DISHENG MOTOR CO LTD
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