Soft-switching triangular current mode control for three phase two-level converters with power factor control
AssigneeVirginia Tech Intellectual Properties, Inc.
InventorsNidhi Haryani, Rolando Burgos
Life of this patent
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Abstract
Critical-mode soft-switching techniques for a power converter are described. In one example, a power converter includes a bidirectional converter electrically coupled between an alternating current (AC) power system and a direct current (DC) power system, where the bidirectional converter includes a number of phase legs. The power converter can also include a control system configured, during a portion of a line cycle of the AC power system, to clamp a first phase leg of the converter from switching and operate second and third phase legs of the converter independently in either critical conduction mode (CRM) or in discontinuous conduction mode (DCM).
Claims20
A power converter, comprising:
- a bidirectional converter electrically coupled between an alternating current (AC) power system and a direct current (DC) power system, the bidirectional converter comprising a number of phase legs;
- and
- a control system for the bidirectional converter configured, during a portion of a line cycle of the AC power system, to:
- clamp a first phase leg of the bidirectional converter from switching;
- and
- operate each of a second phase leg of the bidirectional converter and a third phase leg of the bidirectional converter independently in either discontinuous conduction mode (DCM) or triangular current mode (TCM).
A power converter, comprising:
- a bidirectional converter electrically coupled between a first power system and a second power system, the bidirectional converter comprising a number of phase legs;
- and
- a control system for the bidirectional converter configured, during a portion of a line cycle of the first power system, to:
- clamp a first phase leg of the bidirectional converter from switching;
- and
- operate a second phase leg of the bidirectional converter in discontinuous conduction mode (DCM);
- and
- operate a third phase leg of the bidirectional converter in triangular current mode (TCM).
Dependencies are inferred from the claim text.