Rotor magnetic steel sheet, rotor skewed pole unit and skewed pole type rotor

Abstract

The invention discloses a rotor magnetic steel sheet, a rotor skewed pole unit and a skewed pole type rotor, and belongs to the technical field of automobile parts. A rotor magnetic steel sheet comprises an axis hole located in the center of the rotor magnetic steel sheet, and the axis hole is provided with a center line. A plurality of groups of magnetic steel grooves are uniformly distributed on the rotor magnetic steel sheet, and two adjacent groups of magnetic steel grooves are symmetrically distributed about a center line; a plurality of groups of mounting holes are formed in the rotor magnetic steel sheet, and each group of mounting holes are respectively positioned in an area between two adjacent groups of magnetic steel grooves; each group of mounting holes comprises a first hole and a second hole, the first hole and the second hole are respectively positioned on two sides of the center line, a connecting line of the center of the first hole and the center of the rotor magnetic steel sheet is a first connecting line, a connecting line of the center of the second hole and the center of the rotor magnetic steel sheet is a second connecting line, and an included angle between the first connecting line and the center line is a first included angle; the included angle between the second connecting line and the center line is a second included angle which is smaller than the first included angle. According to the invention, the rotor magnetic steel sheet is utilized to realize rotor skewed poles, which is beneficial to realizing high performance of the motor.

Description

technical field [0001] The application belongs to the technical field of auto parts, and relates to a rotor structure of a driving motor, in particular to a rotor magnetic steel sheet, a rotor oblique pole unit and an oblique pole type rotor. Background technique [0002] At present, in new energy vehicles, the core power of the new energy drive system is the traction motor. The traction motor system includes a stator assembly, a rotor assembly, in which the rotor is supported on the housing assembly by bearings, and other wiring structures, sensors, etc. The current technology trend of new energy drive system is to develop towards high speed and high power density, which requires high integration and high performance in a limited space, which will bring great difficulties to the design of the rotor structure. [0003] In related technologies, in order to eliminate the cogging torque and torque fluctuation, or to weaken the influence of air gap harmonics, etc., to facilitate...

AI Technical Summary

Problems solved by technology

However, most of the existing rotor multi-stage skew poles require different types of punches, which have the disadvantages of multiple shapes of punches, large investment in molds and tooling, and complicated assembly, which makes the processing of the entire rotor structure more difficult and costly, resulting in production costs. The increase and the problem that is not conducive to the improvement of production efficiency

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