Permanent magnet synchronous motor magnetic steel surface-mounted type rotor skewed pole structure and production technology

Abstract

The invention discloses a permanent magnet synchronous motor magnetic steel surface-mounted type rotor skewed pole structure and a production technology. A rotor comprises a main shaft, a rotor iron core disposed on the main shaft, and a plurality of magnetic steels disposed on the rotor iron core. The number of the magnetic steels is an integral multiple of a pole number of a permanent magnet synchronous motor. Each magnetic steel is attached to the outer peripheral surface of the rotor iron core, and a plurality of magnetic steels are distributed at intervals along the peripheral direction of the rotor iron core. Each magnetic steel comprises a plurality of segments of unit magnetic steels, which are sequentially arranged along the axis extension direction of the rotor iron core. The adjacent end surfaces of the adjacent two segments of the unit magnetic steels are tightly contacted with each other along the axis extension direction of the rotor iron core, and the two adjacent segments of the unit magnetic steels are staggered at an angle or at an interval toward the same direction in the peripheral direction of the rotor iron core. The surface of the rotor is provided with the magnetic steels in an attached manner to form the skewed pole type rotor structure, and by adopting the skewed poles, a rotor skewed groove object is realized. The moment fluctuation and the high order harmonic component of the permanent magnet synchronous motor are reduced, and stray losses are reduced, and therefore the efficiency of the permanent magnet synchronous motor is improved.

Description

technical field [0001] The invention relates to the technical field of permanent magnet synchronous motors, in particular to a magnetic steel surface-mounted rotor oblique pole structure and manufacturing process of permanent magnet synchronous motors. Background technique [0002] According to statistics, my country's motor holdings are about 1.7 billion kilowatts, and the total power consumption is about 3 trillion kwh, accounting for 64% of the total electricity consumption of the whole society. Among them, the total power consumption of motors in the industrial field is 2.6 trillion kwh , accounting for about 75% of industrial electricity consumption. When the country promotes energy conservation and emission reduction and organizes the implementation of the "Ten Energy Conservation Projects", it includes the motor system energy conservation project among them. The energy efficiency limit value and energy efficiency level of the motor are close to the international motor...

AI Technical Summary

Problems solved by technology

Due to limited conditions, when designing permanent magnet motors, sometimes due to various conditions, it is not allowed to use conventional stator skewed slots, which will inevitably force the rotor to use skewed slots, but once the rotor adopts skewed slots, the magnetic steel slot and magnetic steel must be S-shaped ,like figure 1 As shown, even if the magnet adopts the surface mount type, the magnet needs to be inclined, but it is difficult to realize due to the distortion of the surface of the magnet.

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