High frequency isolation in standby power supplies which compensate load harmonic currents

High frequency isolation in standby power supplies helps to achieve a high power density. A system using a high frequency AC link, utilizing a cycloconverter, with bilateral power flow is studied. The effect of using a high frequency transformer is evaluated and considerations are discussed for implementing such a system. This standby power supply compensates for load harmonic currents under normal circumstances when the utility is within a nominal voltage range.<<ETX>>

[1]  T. Kawabata,et al.  High frequency link DC/AC converter with PWM cycloconverter , 1990, Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting.

[2]  Tore Undeland,et al.  Power Electronics: Converters, Applications and Design , 1989 .

[3]  D.M. Divan,et al.  Design considerations for high power high frequency transformers , 1990, 21st Annual IEEE Conference on Power Electronics Specialists.

[4]  Yasuo Matsuda,et al.  New conversion system for UPS using high frequency link , 1988, PESC '88 Record., 19th Annual IEEE Power Electronics Specialists Conference.

[5]  Ned Mohan,et al.  Adaptive tolerance-band current control of standby power supply provides load-current harmonic neutralization , 1992, PESC '92 Record. 23rd Annual IEEE Power Electronics Specialists Conference.

[6]  Phoivos D. Ziogas,et al.  Bilateral DC to AC convertor using a high frequency link , 1987 .