Three-phase motor stator structure and motion

Abstract

The invention discloses a three-phase motor stator structure and motor. The stator comprises an annular stator core and stator windings arranged on the stator core; The inner wall of the stator core is provided with a plurality of slots; the stator windings comprise two winding elements connected in a parallel mode, and each winding element comprises three branches windings connected in a star-shaped mode; each branch winding comprises an outgoing line, a plurality of conducting bars and a neutral line, which are connected in order; the conducting bars are formed by two legs and a transition part connected between the two legs in an integrated mode, and the transition part comprises two parallel straight arms part and a u-shape part connected between the straight arms part in an integrated mode; each branch winding is provided with six circles of windings along the circumferential direction of the stator core, and each circle of winding forms three turns of active winding. Optimizing the stator structure makes it low of the motor no-loads opposite potential harmonic and the electromagnetic noise, and insures the torque of the motor large enough under the condition of the maximum torque and the maximum velocity, and it is suitable for drive motor of electric vehicle.

Description

technical field [0001] The invention belongs to the field of motor structure, and in particular relates to a stator structure of a three-phase motor used in an electric vehicle. Background technique [0002] The three-phase motor involved in this patent is used in electric vehicles. At present, manufacturers of electric vehicles have high requirements on the specific power (total output power / total weight) and noise of the motor, so they can only use flat wire winding and short-distance winding. When the stator core is integral, the stator flat wire winding form that can be used in mass production is U-shaped coil, one of its characteristics is that the number of solder joints is proportional to the number of turns of the coil. In order to reduce the number of solder joints and facilitate manufacturing, the number of turns is usually less than or equal to 5. At present, the number of short-distance windings using U-shaped coils on the market is only 2 or 4. [0003] A man...

AI Technical Summary

Problems solved by technology

When the number of turns is 2, the maximum torque requirement of the motor cannot be met; when the number of turns is 4 or 5, the torque requirement at the maximum speed of the motor cannot be met

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