Motor rotor and motor

Abstract

The invention provides a motor rotor and a motor. The motor rotor comprises a rotor core (1). The rotor core (1) is provided with a first installation groove (2) perpendicular to the d axis of the motor and two second installation grooves (3) located in the two sides of the first installation groove (2). A first permanent magnet (4) is arranged in the first installation groove (2). Second permanent magnets (5) are arranged in the second installation grooves (3). The two second installation grooves (3) are symmetrical about the d axis of the motor. An included angle alpha is formed between thefirst installation groove (2) and the second installation grooves (3), and alpha is larger than or equal to 155 degrees and smaller than or equal to 170 degrees. According to the motor rotor providedby the invention, the demagnetization resistance of the motor rotor can be effectively improved, and the output torque of the motor is ensured.

Description

technical field [0001] The present application relates to the field of motor technology, in particular to a motor rotor and a motor. Background technique [0002] High-speed permanent magnet synchronous motor has many advantages such as high power density, good dynamic response and simple structure, and has become one of the research hotspots in the field of international motors. Rotor strength is the core of high-speed motor design, and designing a high-strength rotor structure under the same material has become an important technology for high-speed motors. For the built-in high-speed motor rotor, the maximum stress generally occurs at the rib of the high-speed motor rotor, so increasing the strength of the rib has a significant effect on improving the strength of the rotor. [0003] In the prior art, in order to improve the structural strength of the motor rotor, magnetic steel sections are generally arranged, and reinforcing ribs are provided between two adjacent sectio...

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Problems solved by technology

[0003] In the prior art, in order to improve the structural strength of the motor rotor, magnetic steel sections are generally arranged, and reinforcing ribs are provided between two adjacent sections. In addition, the magnetic steel generally adopts a U shape or a straight shape. When the magnetic steel is used, the area of ​​the rotor core located in the U-shaped area is small, so magnetic saturation is prone to occur, resulting in the formation of an easy-to-demagnetize area in this area, which affects the reliability of the motor operation. The volume is limited, and the output torque of the motor is reduced

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