Title :
New conversion system for UPS using high frequency link
Author :
Yamato, Ikuo ; Tokunaga, Norikazu ; Matsuda, Yasuo ; Amano, Hisao ; Suzuki, Yutaka
Author_Institution :
Hitachi Ltd., Ibaraki, Japan
Abstract :
A novel conversion system for a UPS (uninterruptible power supply) using a high-frequency link is described. The UPS consists of a high-frequency inverter and transformer and a cycloconverter. The cycloconverter can be operated by both source commutation and self-commutation (by turning off the switching devices). A choice is made between the two commutation methods, depending on switching device losses during commutation and the internal voltage drop caused by commutating reactance. A compact and efficient UPS can be realized with this conversion system.<>
Keywords :
commutation; cycloconvertors; emergency power supply; invertors; losses; power transformers; switching; UPS; commutating reactance; conversion system; cycloconverter; high frequency link; high-frequency inverter; internal voltage drop; self-commutation; source commutation; switching device losses; transformer; uninterruptible power supply; Batteries; Filters; Frequency conversion; Power supplies; Pulse inverters; Pulse transformers; Pulse width modulation inverters; Rectifiers; Uninterruptible power systems; Voltage control;
Conference_Titel :
Power Electronics Specialists Conference, 1988. PESC '88 Record., 19th Annual IEEE
Conference_Location :
Kyoto, Japan
DOI :
10.1109/PESC.1988.18193
