Induction motor controller

Abstract

The present invention provides a motor controller including a first capacitor connected in series with stator coils of the motor and a PTC thermistor (Positive Temperature Coefficient thermistor) connected in parallel with the first capacitor. It is capable of swiftly driving a motor at the initial stage and driving the motor with high efficiency and low power consumption after swiftly driving the motor at the initial stage.

Description

technical field [0001] The present invention relates to an induction motor, and more particularly to an induction motor controller. Background technique [0002] figure 1 It is a structural schematic diagram of an induction motor according to the prior art. [0003] Such as figure 1 As shown, the induction motor according to the prior art mainly includes: a stator 100 ; an induction rotor 120 ; a permanent magnet rotor 150 ; and a rotating shaft 140 . [0004] The stator 100 is composed of four stator coils 160A, 160B, 160C and 160D which are respectively wound on the iron core 110 of the induction motor. Meanwhile, in order to generate an elliptical rotating magnetic field in the stator 100, four correction coils (shading coils) 170A, 170A, 170B, 170C and 170D. Here, the four stator coils 160A, 160B, 160C, and 160D are sequentially connected in series so that coils adjacent to each other have the same polarity. [0005] The permanent magnet rotor 150 includes ring-sha...

AI Technical Summary

Problems solved by technology

However, when the induction motor is initially driven, since the current applied to the stator is smaller than the current required for driving, the magnetomotive force decreases, and because the magnetomotive force decreases, the induction motor cannot be driven quickly in the initial stage

Images