Energy-saving motor capable of eliminating resistance of rotor tooth grooves

Abstract

The invention discloses an energy-saving motor capable of eliminating the resistance of rotor tooth grooves. According to the energy-saving motor capable of eliminating the resistance of the rotor tooth grooves, a stator core is of a structure that salient poles and tooth grooves coexist, namely both the salient poles and the tooth grooves are arranged on the stator core, the tooth grooves are located in the inner end faces, facing a rotor, of the salient poles, main windings are installed on the tooth grooves, auxiliary windings are installed on the salient poles, and the number of the salient poles of the stator core is three times the number of pole-pairs of the motor. The wire inserting mode of the main windings installed on the tooth grooves is the same as the wire inserting mode of a traditional motor, the phase sequence of the auxiliary windings installed on the salient poles are the same as the phase sequence of the main windings installed on the tooth grooves, the phase positions of the auxiliary windings installed on the salient poles and the phase positions of the main windings installed on the tooth grooves are staggered, and the direction of the magnetic field of the auxiliary windings installed on the salient poles is opposite to the direction of the magnetic field of the main windings installed on the tooth grooves. The energy-saving motor capable of eliminating the resistance of the rotor tooth grooves has the advantages that the resistance of the tooth grooves of the motor can be reduced or eliminated, the three-phase current, the active power, the reactive power and the apparent power of the motor can be reduced under the same load condition, the power factor is increased, energy can be saved by the motor, and the heat dissipation performance is good.

Description

technical field [0001] The invention relates to the technical field of electric motors, in particular to an energy-saving electric motor for eliminating rotor cogging force. Background technique [0002] In the past 200 years of history, the ancestors of electromagnetism invented direct current, three-phase alternating current, invented direct current motor and alternating current motor, synchronous motor, asynchronous motor, servo motor and so on. Electric motors play a pivotal role in industrial production and daily life in today's world. Traditional motor stators are divided into salient pole stators and recessed pole stators. The iron core of the salient pole stator is in the interior of the stator ring, facing the rotor axis, with multiple inwardly protruding iron core columns evenly distributed. There is a certain air gap between the end face of the column and the rotor. The salient pole stator adopts a concentrated winding, usually wound into a rectangular coil, wra...

AI Technical Summary

Problems solved by technology

Compensation windings greatly increase the cost of the motor and are only used where extremely severe load properties must apply them

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