Title :
Design and implementation of an FPGA-based control IC for the single-phase PWM inverter used in an UPS
Author :
Jung, Shih-Liang ; Chang, Meng-Yueh ; Jyang, Jin-Yi ; Huang, Hsiang-Sung ; Yeh, Li-Chia ; Tzou, Ying-Yu
Author_Institution :
Power Electron. & Motion Control Lab., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
This paper presents an FPGA-based multiple-loop control scheme for the regulation of the PWM inverters used in UPS. The proposed control scheme incorporates an inner current loop with an outer voltage loop to regulate the output voltage of the PWM inverter, which is expected to be sinusoidal. The corresponding control gains are designed through deadbeat theory so that the inverter can achieve fast dynamic response. An output voltage decoupling mechanism and a load disturbance compensation scheme have been proposed to improve the stiffness of the controlled PWM inverter. The developed digital controller has been realized by a RAM-based FPGA XC4010 to verify its effectiveness. The simulation and experimental results show that the output voltage of the controlled PWM inverter has good transient response and little distortion under rough load conditions
Keywords :
PWM invertors; compensation; digital control; electric current control; field programmable gate arrays; integrated circuits; transient response; uninterruptible power supplies; voltage control; FPGA-based control IC; FPGA-based multiple-loop control scheme; PWM inverters regulation; RAM-based FPGA XC4010; UPS; deadbeat theory; digital controller; fast dynamic response; inner current loop; load disturbance compensation; outer voltage loop; output voltage; output voltage decoupling mechanism; output voltage regulation; rough load conditions; single-phase PWM inverter; stiffness improvement; transient response; Control systems; Digital control; Field programmable gate arrays; Filters; Motion control; Power conditioning; Pulse width modulation inverters; Transient response; Uninterruptible power systems; Voltage control;
Conference_Titel :
Power Electronics and Drive Systems, 1997. Proceedings., 1997 International Conference on
Print_ISBN :
0-7803-3773-5
DOI :
10.1109/PEDS.1997.618728