US 7,483,282 B2
PWM method for cycloconverter
Lateef A. Kajouke, San Pedro, Calif. (US); and Silva Hiti, Redondo Beach, Calif. (US)
Assigned to GM Global Technology Operations, Inc., Detroit, Mich. (US)
Filed on Aug. 29, 2006, as Appl. No. 11/468,001.
Prior Publication US 2008/0055938 A1, Mar. 06, 2008
Int. Cl. H02M 7/48 (2007.01); H02M 5/00 (2006.01)
U.S. Cl. 363—149  [363/159; 363/8] 34 Claims
OG exemplary drawing
 
1. In a cyclo-converter that includes a first port having first and second nodes, a second port having first and second nodes, a first switch pair coupled between the first node of the first port and the first node of the second port, a second switch pair coupled between the second node of the first port and the first node of the second port, a third switch pair coupled between the first node of the first port and the second node of the second port, and a fourth switch pair coupled between the second node of the first port and the second node of the second port, each switch pair including a switch of a first topology type and a switch of a second topology type in series connection, a method comprising:
switching a first switch of the first topology type to an on state after a magnitude of a current through an output inductor becomes less than a predetermined current threshold; and
switching a second switch of the first topology type to an off state a first predetermined time after switching the first switch of the first topology type to the on state.