PWM series resonant DC-link converter with current clamping by the use of saturable core

A series resonant DC link power converter with pulsewidth modulation (PWM) capability and current peak limiting is proposed. When desired, a resonant transition creates notches in the DC link current, allowing the switches of the power converter to synchronize with external PWM strategy. For that, it requires only an additional bidirectional switch. A saturable core (SC) achieves current peak limiting of which the clamping level is automatically adjusted by the current load. Analysis and design procedure are presented for the proposed topology, which does not use any dedicated devices for startup. Simulated and experimental results corroborate the theoretical studies.

[1]  Thomas A. Lipo,et al.  Current-clamped, modified series resonant DC-link power converter for a general purpose induction motor drive , 1997 .

[2]  E.R.C. da Silva,et al.  A current clamping circuit for a PWM series resonant DC link power converter , 1995 .

[3]  E.R.C. da Silva,et al.  Notching current source AC/AC converters for soft switched PWM , 1994 .

[4]  Thomas A. Lipo,et al.  Input power factor control of AC-DC series resonant DC link converter using PID operation , 1996 .

[5]  B.R. Menezes,et al.  An active current clamping circuit for a series resonant DC link power converter , 1994, Proceedings of 1994 Power Electronics Specialist Conference - PESC'94.

[6]  Thomas A. Lipo,et al.  CURRENT PEAK LIMITING FOR A SERIES RESONANT DC LINK POWER CONVERTER USING A SATURABLE CORE , 1996 .

[7]  G. Ledwich,et al.  Pulse width modulated series resonant converter , 1992, Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting.

[8]  T.A. Lipo,et al.  High frequency series resonant DC link power conversion , 1988, Conference Record of the 1988 IEEE Industry Applications Society Annual Meeting.

[9]  Colonel William T. McLyman,et al.  Transformer and inductor design handbook , 1978 .

[10]  D.M. Divan,et al.  Characterization of GTOs for soft switching applications , 1988, Conference Record of the 1988 IEEE Industry Applications Society Annual Meeting.

[11]  Thomas A. Lipo,et al.  Quasi current resonant DC link AC/AC converter , 1993 .

[12]  G. Ledwich,et al.  Soft switched notching current source inverters , 1992, PESC '92 Record. 23rd Annual IEEE Power Electronics Specialists Conference.