12-slot 10-pole permanent-magnetic brushless motor

Abstract

The invention provides a 12-slot 10-pole permanent-magnetic brushless motor. A rotor is provided with 20 slot wedges. 20 magnetic steel sheets are installed among the slot wedges. Each of the magnetic steel sheets is of a V-type embedded structure. Each V-type unit is formed by two adjacent magnetic steel sheets. 10 V-type units are uniformly distributed around the rotor. Polarity of two faces, arranged in the corresponding V-type opening, of the magnetic steel sheets is the same and each V-type opening is towards the surface of the rotor. The polarity of the opening of each V-type unit is different from that of openings of adjacent two V-type units. The thickness of each magnetic steel sheet is 3.0+ / - 0.01mm. According to the invention, steel faces can be protected; demagnetizing resisting ability of the brushless motor is improved; stable operation life of the motor is prolonged; high-speed performance of the motor is improved; flux weakening ability of the motor is effectively improved; and constant-power operation range of the motor is extended.

Description

technical field [0001] The invention relates to a permanent magnet brushless motor used in an electric tricycle, in particular to a permanent magnet brushless motor with 12 slots and 10 poles embedded in rotor magnetic steel. Background technique [0002] At present, the permanent magnet motors used in electric tricycles in the market are mostly in the form of 12 slots and 8 poles. The rotor is embedded in the surface. In the gas field, it is easy to demagnetize, which reduces the life of the motor during long-term operation, and is likely to cause damage to the magnetic steel, which limits the high-speed operation capability; this structure has insufficient magnetic field weakening capability, which affects the constant power operation range of the motor. Contents of the invention [0003] Purpose of the invention: In view of the shortcomings of the brushless motor with 12 slots and 8 poles, a permanent magnet brushless motor with 12 slots and 10 poles is proposed. The st...

AI Technical Summary

Problems solved by technology

[0002] At present, the permanent magnet motors used in electric tricycles in the market are mostly in the form of 12 slots and 8 poles. The rotor is embedded in the surface. In the gas field, it is easy to demagnetize, reduce the life of the motor during long-term operation, and easily cause damage to the magnetic steel, which limits the high-speed operation capability;

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