Bidirectional power conversion with multiple control loops

• US 7,538,532 B2
• Filed: 03/17/2008
• Issued: 05/26/2009
• Est. Priority Date: 10/11/2002
• Status: Active Grant

• Current Assignee: Analog Devices International Unlimited Company (Analog Devices, Inc.)
• Original Assignee: Linear Technology Corporation (Analog Devices, Inc.)
• Inventors: Hack, Thomas P., Dobkin, Robert C.
• Primary Examiner(s): HAN, YOUNGHUIE JESSICA
• Application Number:
  US12/076,302
• Publication Number:
  US 20080164853A1
• Time in Patent Office: 435 Days
• Field of Search: 327/410, 327/413, 327/427, 327/484, 323/247, 323/283, 323/284, 323/290
• US Class Current: 323/284
• CPC Class Codes: G05F 1/70 Regulating power factor; Regulating reactive current or power
• CPC Class Codes: H02M 3/1582 Buck-boost converters H02M3/1584 takes precedence
• CPC Class Codes: H02M 3/33584 Bidirectional converters

Abstract

Bidirectional power conversion systems provide the ability to change power attributes to and from a component. Current bidirectional power conversion systems use a unidirectional power converter for each direction. The integration of the two normally independent power converters results in a bidirectional power converter with nearly half the size, weight, volume, cost and complexity. Described are embodiments of bidirectional power conversion systems that allow power transfer between two or more components without requiring the use of separate unidirectional power converters.

Claims

1. A driver circuit for controlling the switching of at least two power switches in a bidirectional power converter, said at least two power switches intermittently connecting at least two power buses to a reactive element, said driver circuit comprising at least first and second anti-cross conduction circuits, the outputs of said first and second anti-cross conduction circuits that drive said power switches based on at least a selection signal, the output of the first anti-cross conduction circuit being fed back to the second anti-cross conduction circuit, the output of the second anti-cross conduction circuit being fed back to the first anti-cross conduction circuit.

2. The driver circuit of claim 1, said driver circuit comprising at least one level shifter that receives at least said selection signal, said level shifter that increases the voltage level of said selection signal prior to providing said selection signal voltage level to said first and second anti-cross conduction circuits.