Title :
Parallel redundant UPS with instantaneous PWM control
Author :
Oshima, H. ; Miyazaya, Y. ; Hirata, A.
Author_Institution :
Toshiba Corp., Tokyo, Japan
Abstract :
The authors describe a parallel redundant uninterruptible power system (UPS) with instantaneous pulsewidth modulation (PWM) control using insulated gate bipolar transistors (IGBTs) in the inverter units. The main features of the control method are that instantaneous parallel control at high frequency is realized and the parallel control for compensating power imbalance between UPS units in parallel and synchronization control to the bypass are completely digital by using a digital signal processor. The redundant UPS takes up less space, has low audible noise and good control characteristics for steady and transient states
Keywords :
digital control; digital signal processing chips; insulated gate bipolar transistors; invertors; power transistors; pulse width modulation; synchronisation; uninterruptible power supplies; HF; IGBTs; PWM; UPS; characteristics; digital signal processor; insulated gate bipolar transistors; inverter; parallel control; parallel redundant uninterruptible power system; synchronization control; Acoustic noise; Control systems; Digital signal processors; Frequency synchronization; Insulated gate bipolar transistors; Pulse inverters; Pulse power systems; Pulse width modulation; Pulse width modulation inverters; 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.1991.172432
