Title :
High-performance UPS system employing microcomputer-based digital control
Author :
Kido, S. ; Ishimoto, Yoshinori ; Tanaka, Saburo ; Yamamoto, Shigeru
Author_Institution :
Yuasa Battery Co. Ltd., Osaka, Japan
Abstract :
The authors present a uninterruptible power supply (UPS) using a new control method, and provided with a pulse-width-modulated (PWM) power converter and PWM inverter. The UPS has an insulated gate bipolar transistor as the semiconductor switching device, and provides for direct digital control by the application of a microcomputer. This UPS has also made possible a sine input current through the use of digital calculation, and an input power factor of 1.0 through microcomputer control. This unit has realized a highly reliable switching system through synchronous control of the bypass power supply and converter with a digital phased locked loop comprising a microcomputer
Keywords :
digital control; insulated gate bipolar transistors; invertors; microcomputer applications; power convertors; power transistors; pulse width modulation; uninterruptible power supplies; IGBT; PWM; UPS; digital control; insulated gate bipolar transistor; inverter; microcomputer; phased locked loop; power converter; power factor; power transistors; switching; synchronous control; uninterruptible power supply; Digital control; Insulated gate bipolar transistors; Microcomputers; Power semiconductor switches; Power system reliability; Pulse inverters; Pulse width modulation converters; Pulse width modulation inverters; Pulsed power supplies; Uninterruptible power systems;
Conference_Titel :
Telecommunications Energy Conference, 1991. INTELEC '91., 13th International
Conference_Location :
Kyoto
Print_ISBN :
0-87942-670-5
DOI :
10.1109/INTLEC.1991.172430
