Three phase rat cage asynchronous motor having self interference resisting speed regulating circuit

Abstract

The invention provides a three-phase squirrel cage asynchronous motor with an auto-disturbance-rejection speed regulation circuit. The three-phase squirrel cage asynchronous motor is characterized in that the motor consists of four parts: a three-phase squirrel cage asynchronous motor, a state acquisition circuit, a digital control circuit with an auto-disturbance-rejection speed regulation function and a control quantity transmission circuit; the three-phase squirrel cage asynchronous motor has the advantages of obviously improving the capability that the three-phase squirrel cage asynchronous motor resists the external disturbance, leading the rotation speed to be recovered to the rated rotation speed after suffering severe disturbance, being capable of controlling the three-phase squirrel cage asynchronous motor in real time, reducing the control delay caused by low processing speed of a normal singlechip as a digital signal processor is employed, having higher reliability for the calculation and control, improving the dynamic performance of the motor, and reinforcing the stability and the reliability when the three-phase squirrel cage asynchronous motor runs.

Description

(1) Technical field: [0001] The invention relates to a three-phase squirrel-cage asynchronous motor, in particular to a three-phase squirrel-cage asynchronous motor with an automatic disturbance rejection speed regulating circuit. (two) background technology: [0002] The three-phase asynchronous motor has the characteristics of simple and firm rotor structure, small moment of inertia, convenient maintenance, low price, and wide range of power and speed, and can be directly driven by three-phase power frequency power supply, and is widely used in industrial production; Due to the complexity of the asynchronous motor model and the limitation of control means, the development of high-performance AC motor speed control technology is slow, and the field of high-precision speed control is almost all DC speed control systems; with the development of power electronics technology, microelectronics technology, new motor control With the development of theory, the use of three-phase a...

AI Technical Summary

Problems solved by technology

[0006] The proportional, integral and differential controller 7 of the above-mentioned prior art three-phase squirrel-cage asynchronous motor speed control circuit adopts a single-chip microcomputer to realize the above-mentioned algorithm, and its defect is: the disturbance resistance to the three-phase squirrel-cage asynchronous motor 8 is poor, making the three-phase mouse The cage asynchronous motor cannot recover to the rated speed after a large disturbance

Images