Core structure of skew-pole rotor of permanent magnet motor and laminating method thereof

Abstract

The invention discloses a core structure of a skew-pole rotor of a permanent magnet motor and a laminating method of the core structure. The core structure comprises a shaft and rotor cores, wherein the rotor cores are provided with a first locating hole, a second locating hole, a third locating hole and a fourth locating hole respectively. According to the laminating method, the first locating hole of the first rotor core, the second locating hole of the second rotor core, the third locating hole of the third rotor core and the fourth locating hole of the fourth rotor core are located at the same circumferential position through a locating pin, a spiral staggered structure is formed by magnetic steel bonding faces on the rotor cores, and then the skew pole effect of the rotor can be achieved. The core structure of the skew-pole rotor of the permanent magnet motor and the laminating method of the core structure have the advantages that eddy-current loss of the motor can be reduced by the adoption of the laminated structure of the rotor cores, magnetic leakage between adjacent pieces of magnetic steel can be reduced by the arrangement of magnetism isolation grooves, the performance of the motor is improved, the structure is simple, and the machining and manufacturing process is convenient to carry out.

Description

technical field [0001] The invention relates to a rotor structure of a motor, in particular to an oblique pole rotor core structure of a permanent magnet motor. Background technique [0002] Usually, the rotor of a motor contains an iron core and a shaft, while the rotor of a permanent magnet motor also contains magnetic steel. Different motors have different requirements for their magnetic circuits, and the structure of the rotor will also be different. The structure of the iron core is often made of integral low-carbon steel. Before pasting the magnetic steel, it is necessary to process positioning grooves or positioning ribs on the surface of the rotor core in advance. It is complicated and cannot be carried out with ordinary processing equipment, and the processing of the positioning ribs forming a helix angle with the direction of the rotor axis needs to be carried out with a processing center, which is not only labor-intensive and time-consuming, but also increases pro...

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Problems solved by technology

[0002] Usually, the rotor of a motor contains an iron core and a shaft, while the rotor of a permanent magnet motor also contains magnetic steel. Different motors have different requirements for their magnetic circuits, and the structure of the rotor will also be different. The structure of the iron core is often made of integral low-carbon steel. Before pasting the magnetic steel, it is necessary to process positioning grooves or positioning ribs on the surface of the rotor core in advance. It is complicated and cannot be carried out with ordinary processing equipment, and the processing of the positioning ribs forming a helix angle with the direction of the rotor axis needs to be carried out with a processing center, which is not only labor-intensive and time-consuming, but also increases processing costs. The eddy current loss will also increase when the motor is running, reducing the output power of the motor

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