Title :
A discretized current control technique with delayed input voltage feedback for a voltage-fed PWM inverter
Author :
Oh, Dong Seong ; Cho, Kwan Yuhl ; Youn, Myung Joong
Author_Institution :
Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Seoul, South Korea
fDate :
4/1/1992 12:00:00 AM
Abstract :
A current control technique for a voltage-fed PWM inverter is presented. The discretized state equation of an inverter and a load independent of operating conditions with the delayed input voltage feedback has been derived using the averaging concept. The discretized current controller is proposed to reduce the current error as fast as possible using the deadbeat control strategy and to stabilize the closed loop system asymptotically when the variations of load parameters are given in the predetermined stabilized region. This proposed control scheme is realized by the symmetrical uniform sampling method and is easily implemented using a microprocessor-based system. Computer simulation for the proposed controller has been carried out and the results show good static and dynamic performances
Keywords :
closed loop systems; control system analysis computing; digital control; digital simulation; discrete systems; electric current control; feedback; invertors; load (electric); microcomputer applications; pulse width modulation; stability; averaging concept; closed loop system; controller; deadbeat control; delayed input voltage feedback; digital control; discretized current control; load; microprocessors; state equation; symmetrical uniform sampling method; voltage-fed PWM inverter; Closed loop systems; Control systems; Current control; Delay; Equations; Error correction; Pulse width modulation inverters; Sampling methods; State feedback; Voltage;
Journal_Title :
Power Electronics, IEEE Transactions on
