Multi-input DC/DC converters with zero-current switching
First Claim
1. A multi-input dc/dc converter comprising:
- a plurality of input modules, each input module including at least one input terminal for coupling to a separate dc power source and a full bridge converter having four main switches;
a transformer having a plurality of primary windings and at least one secondary winding, each primary winding coupled to one of the full bridge converters;
at least one output terminal for supplying dc power to a load; and
a rectifier circuit coupled between the secondary winding of the transformer and said output terminal;
each input module further including an auxiliary circuit coupled in parallel with the full bridge converter, the auxiliary circuit configured to achieve turn-on and turn-off of the four main switches when there is substantially no current flowing through each switch being turned on or turned off.
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Accused Products
Abstract
A modular-based, zero-current-switched (ZCS), isolated full-bridge boost converter with multiple inputs is disclosed. Each converter module is used to match the connected input source and control the amount of power drawn from the source. The power from various sources are combined together and delivered to the load through a multiphase transformer. The input inductor of each boost-derived converter module keeps the input current constant and acts as a current source to drive the multiphase transformer through a phase-shifted-controlled full bridge converter. By connecting an auxiliary circuit across the full-bridge input in each module, the transformer leakage inductance and output capacitance of the switching devices are used to create resonant paths for facilitating zero-current-switching of all switching devices.
26 Citations
17 Claims
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1. A multi-input dc/dc converter comprising:
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a plurality of input modules, each input module including at least one input terminal for coupling to a separate dc power source and a full bridge converter having four main switches; a transformer having a plurality of primary windings and at least one secondary winding, each primary winding coupled to one of the full bridge converters; at least one output terminal for supplying dc power to a load; and a rectifier circuit coupled between the secondary winding of the transformer and said output terminal; each input module further including an auxiliary circuit coupled in parallel with the full bridge converter, the auxiliary circuit configured to achieve turn-on and turn-off of the four main switches when there is substantially no current flowing through each switch being turned on or turned off. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 14, 15, 16, 17)
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12. A multi-input DC/DC converter comprising:
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a plurality of input modules, each input module including at least one input terminal for coupling to a separate dc power source, a full bridge converter having four main switches, and means for achieving turn-on and turn-off of the four main switches when there is substantially no current flowing through each switch being turned on or turned off; a transformer having a plurality of primary windings and at least one secondary winding, each primary winding coupled to one of the full bridge converters; at least one output terminal for supplying dc power to a load; and a rectifier circuit coupled between the secondary winding of the transformer and said output terminal. - View Dependent Claims (13)
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Specification