Title :
Control strategy for constant voltage/constant current switching-mode instrumentation power supply
Author :
Hsieh, Guan-Chyun ; Lin, Yu-Hung ; Tasi, Hu-Chi
Author_Institution :
Dept. of Electron. Eng., Nat. Taiwan Univ. of Sci. & Technol., Taipei, Taiwan
Abstract :
A strategy for realizing a switching-mode instrumentation power supply (SMIPS) by zero-voltage switching pulse-width modulation (ZVS-PWM) technique is presented. The proposed ZVS-PWM SMIPS is capable of constant-voltage (CV) and constant-current (CC) control with adjustable output voltage/current. A control strategy realized by a voltage-adjusted controller (VAC) and a current-limited controller (CLC) is proposed. A linear voltage regulator (LVR) with low loss is used at the output end for voltage regulation. A system modeling for describing the SMIPS behavior in CC and CV modes is conducted. A 500 W ZVS-PWM SMIPS is designed and realized to assess the system performance and it can gain an efficiency of 90%, good voltage regulation of within ±0.2% in CC mode, and good current regulation of within ±2% in CV mode
Keywords :
PWM power convertors; electric current control; instrumentation; switched mode power supplies; switching circuits; voltage control; 500 W; 90 percent; adjustable output voltage/current; constant current control; constant voltage control; control strategy; current-limited controller; efficiency; linear voltage regulator; low loss; pulse-width modulation technique; switching-mode instrumentation power supply; voltage regulation; voltage-adjusted controller; zero-voltage switching; Instruments; Modeling; Performance gain; Pulse modulation; Pulsed power supplies; Regulators; Space vector pulse width modulation; System performance; Voltage control; Zero voltage switching;
Conference_Titel :
Industrial Electronics Society, 2000. IECON 2000. 26th Annual Confjerence of the IEEE
Conference_Location :
Nagoya
Print_ISBN :
0-7803-6456-2
DOI :
10.1109/IECON.2000.972256
