Concentrated-winding permanent-magnetic synchronous motor

Abstract

The invention relates to a concentrated-winding permanent-magnetic synchronous motor, which comprises a stator and a rotor, wherein the stator comprises a stator iron core and a concentrated-type winding, the stator iron core is formed by laminating magnetic conduction stamped sheets with a plurality of teeth, and the rotor comprises a rotor iron core and magnetic steel; and the ratio of the tooth number of the magnetic conduction stamped sheets and the pole number of the stator is 1.5. An inner circle of each tooth on the stator is designed in a shape to be eccentric to an outer circle of the rotor, and a non-uniform gap is formed between the rotor and the stator, so that the gap flux density at the inner side of the stator is distributed in a sinusoidal way, and when the rotor rotates, the stator windings are coupled with one another to form a counter potential with good sinusoidal. Meanwhile, the inter-phase magneto-resistance of the motor stator is increased, the inter-phase leakage reactance is reduced, the power factor of the motor and the peak power of a depth weak magnetic field can be improved, the mutation degree of the flux density among different teeth of the motor can be slowed down, and the toothed slot torque and noise of the motor can be reduced.

Description

Technical field: [0001] The invention relates to the electrical field, in particular to a permanent magnet synchronous motor, in particular to a permanent magnet synchronous motor embedded with concentrated windings. Background technique: [0002] Among the types of permanent magnet synchronous motors, in order to obtain a good sinusoidal back EMF waveform in conventional concentrated winding permanent magnet synchronous motors, the rotor of the motor is designed to have a uniform air gap, which causes three losses: one is uneven The rotor produces wind loss when it rotates at high speed, and if it is used in air-conditioning compressors and oil-cooled environments, it will produce non-negligible losses; on the other hand, for high-power permanent magnet synchronous motors, when the rotor with built-in permanent magnets is used , the non-uniform air gap design of the rotor increases the size of the air gap in the direction of the quadrature axis, which reduces the reluctance...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a concentrated winding permanent magnet synchronous motor. The concentrated winding permanent magnet synchronous motor will solve the wind loss, Technical issues of low reluctance torque and power density, soft mechanical properties

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