Title :
A digital automatic current control system based on an optimum assumed model
Author :
Futami, Motoo ; Endoo, Tsunehiro ; Notohara, Yasuo ; Kitayama, Tooru
Author_Institution :
Res. Lab., Hitachi Ltd., Ibaraki, Japan
fDate :
1/1/1994 12:00:00 AM
Abstract :
In this paper, a new ACR (automatic current regulator) scheme is introduced for brushless DC motors. It consists of a model closely resembling the motor and PWM inverter, an assumed rising pattern of the current, and a parameter estimation. Using the control scheme, the mean value of the motor current is kept at the reference current, and the transient current of the motor is kept equal to the rising pattern. For the disturbance, because of DC-line voltage change, the proportional path from the error to the duty cycle of the PWM signal stabilizes the ACR. This ACR scheme can be realized with a microcomputer
Keywords :
DC motors; controllers; digital control; electric current control; invertors; machine control; microcomputer applications; parameter estimation; power engineering computing; DC-line voltage change; PWM inverter; PWM signal; assumed rising current pattern; brushless DC motors; digital automatic current control system; duty cycle; microcomputer; optimum assumed model; parameter estimation; transient current; Automatic control; Brushless DC motors; Current control; DC motors; Microcomputers; Parameter estimation; Pulse width modulation; Pulse width modulation inverters; Regulators; Voltage;
Journal_Title :
Power Electronics, IEEE Transactions on
