KR950022019A - Position control device of 3-phase motor - Google Patents

Abstract

The present invention relates to a position control device for a three-phase induction motor, which is to ensure that the three-phase induction motor is maintained exactly the stop position regardless of load and disturbance during the permanent control.

As described above, the present invention stores position information generating means for generating current absolute position information due to a pulse of a variable frequency according to the rotational speed, and stores the absolute position information and sets a speed source according to the present speed voltage and speed command voltage. A control gain for outputting a speed command signal by calculating a stop position setting means for outputting a signal and stop point absolute position information, and calculating a gain voltage with a difference voltage between the stop point absolute position information and the current absolute position information; A speed source which selects the speed command signal set by the control gain setting means and the externally input speed command voltage according to the setting means and the speed source setting signal and inputs it to the speed control means through the first adder together with the current speed voltage; By means of setting means.

Description

Position control device of 3-phase motor

Since this is an open matter, no full text was included.

2 is a configuration diagram of the position control device of the three-phase induction motor of the present invention.

Claims (5)

Position information generating means for generating current absolute position information instantaneously by receiving a pulse of variable frequency obtained by the rotation of the three-phase induction motor, and storing the current absolute position information obtained by the position information generating means at every moment. And stop position setting means for obtaining and outputting the speed source setting signal and the stop point absolute position information according to the current speed voltage and the speed command voltage due to the variable frequency, and the stop point absolute position information and position obtained from the stop position setting means. Control gain setting means for receiving a difference voltage with the current absolute position information obtained by the information generating means and calculating a set gain voltage and outputting a speed command signal; The speed control is performed by selecting the speed command signal set by the control gain setting means and the externally input speed command voltage according to the speed source setting signal obtained by the stop position setting means together with the current speed voltage fed back and inputted by the first trailing device. Position control apparatus for a three-phase induction motor comprising a speed source setting means input by means. 2. The second method according to claim 1, wherein a difference voltage between a stop point absolute position information of the stop position setting means and a current speed voltage resulting from a variable frequency obtained by the rotation of the three-phase induction motor is obtained and input to the control gain setting means. Position control device for a three-phase induction motor further comprising an adder. The method of claim 1, wherein the position information generating means compares an external speed command voltage with a current speed voltage fed back and calculates the absolute position information stored at every moment stored therein, and compares it with the stop point absolute position information. Position control device for a three-phase induction motor, characterized in that output. The speed command voltage of claim 1, wherein the stop position setting means switches the speed source setting means to the speed source setting signal when the external speed command voltage is zero voltage and the current speed voltage inputted by the feedback is zero voltage. And controlling to output a gain-controlled speed command signal of the control gain setting means. The three-phase induction motor according to claim 1, wherein the control gain setting means obtains a speed command signal by multiplying a voltage obtained by the difference between the absolute position information of the stop point and the absolute position information of the position information generating means by a set control gain voltage. Position control device. ※ Note: The disclosure is based on the initial application.