Delphi Technologies, Inc.

Aurelien T Mozipo

Robert D Maple

Brian John Denta

Tillasthanam V Sriram

The switching sequence of a phase-shifted zero-voltage-transition (PS-ZVT) full bridge converter circuit is alternated between two modes by periodically reversing the switching sequence for diagonally opposed switching devices of the bridge. Over a period of operation, each of the switching devices periodically conduct the entire free-wheeling current that occurs during load current reversal transitions so as to balance their average power dissipation and reduce the overall power dissipation of the converter circuit.

Switching sequence control method for a PS-ZVT bridge converter

A device and method for dynamically optimizing a power converter is disclosed. The dynamically optimized power converter unit includes a processor that maximizes efficiency of a power converter supplying energy to a load.

Dynamically optimized power converter

A DC/DC converter employing synchronous rectification includes an energy transfer switch, a diode, a synchronous switch, a processor and a memory subsystem. The processor estimates a diode conduction time and provides a control signal to the synchronous switch to cause the synchronous switch to conduct for a period of time equal to the estimated diode conduction time.

DC/DC converter employing synchronous rectification

Method and system for bi-directionally controlling power flow between two separate direct current power sources in a multi-stage power converter system are provided. The method allows providing at least first and second power converter stages coupled in parallel circuit to one another. The method further allows providing a first switching controller coupled to selectively actuate a pair of switching devices in the first power converter stage, and a second switching controller coupled to selectively actuate a pair of switching devices in the second power converter stage. One of the first and second switching controllers is selected as a master controller, and the other one of the first and second switching controllers is selected as a slave controller. An average voltage measurement is determined at a respective node of each the power converter stages. A compensating signal is generated based on the difference of the average voltage measurements at the respective nodes of each of the power converter stages. The compensating signal is applied to the slave switching controller so that the pair of power switching devices coupled to that slave switching controller is selectively actuated to have a respective on and off duty cycle. The duty cycle imparted by the slave controller is adjustable in response to the compensating signal relative to the duty cycle imparted by the master controller to the pair of power switching devices coupled thereto in order to avoid current imbalance between the power converter stages.

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Kokomo, IN, United States of America

Aurelien T Mozipo