Multi-phase permanent magnet brushless direct current square wave motor capable of replacing Z4 series motors

Abstract

The invention discloses a multi-phase permanent magnet brushless direct current square wave motor capable of replacing Z4 series motors and relates to a direct current motor. The motor consists of four parts, namely a motor body, a position sensor, a speed sensor and an electronic switch control circuit; the multi-phase permanent magnet direct current motor is integrated by multiple three-phase permanent magnet brushless direct current motors in the same set of mechanical component, and comprises the motor body, a motor stator, a motor rotor, rotor magnetic steel, a combined sensor stator, a combined sensor rotor and a fan, wherein the stator winding is wound in a three-phase, or six-phase, nine-phase or multi-phase mode; and tile-shaped magnetic steel is attached to the outer side of the axial surface of the rotor, and the permanent magnetic steel is formed by pole pairs. An electric brush is canceled, the electronic commutation is performed, and the motor is integrally regulated by a controller, so that the average efficiency of the motor is over 94 percent, the load rate is within 25 to 125 percent, the multi-phase permanent magnet brushless direct current square wave motor is a motor driving system in a high-efficiency area, the Z4 series motors can be replaced, and the requirements of energy conservation and emission reduction are met.

Description

Technical field [0001] The invention relates to a DC motor, in particular to a multi-phase permanent magnet brushless DC square wave motor that can replace the Z4 series brushed DC motor. Background technique [0002] Z4 series brushed DC motors are my country's standard series of small DC motors; Z4 series DC motors are widely used in metallurgical industry rolling mills, metal cutting machine tools, papermaking, dyeing and weaving, printing, cement, plastic extrusion machinery and other industrial sectors. [0003] The DC motor is composed of magnetic field, armature, commutator and electric brush. Due to the mechanical commutation structure of the brushed DC motor and the existence of the brush, the DC motor exists, and the average efficiency of the entire series is only 83.8%; the brush and the commutator produce sparks, which quickly damages and corrodes the brush commutator. If the maintenance is not frequent, the motor may be scrapped, the maintenance amount is large, and ...

AI Technical Summary

Problems solved by technology

Due to the mechanical commutation structure of the brushed DC motor and the existence of brushes, the DC motor exists, and the average efficiency of the whole series is only 83.8%; the brushes and commutator generate sparks, which quickly damages and corrodes the brush commutator. If it is not maintained frequently, the motor may be scrapped, the maintenance amount is large, and the environment is poor; the volume and weight are relatively large

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