Synchronous rectifier bi-directional converter

摘要

A system and method for bi-directional voltage conversion are disclosed. A charge current is received at a first voltage on a first force commutated synchronous rectifier, and the charge current is controlled by the first force commutated synchronous rectifier. An inductor is charged by the charge current, and a discharge current from the inductor is controlled by the second force commutated synchronous rectifier.

主权项

1. A synchronous rectifier bi-directional converter system comprising:
an inductor configured for bi-directional conversion; a first force commutated synchronous rectifier coupled directly to the inductor and comprising a first body diode and operable to eliminate reverse recovery time in the first body diode so there is no reverse recovery time by force commutating a commutation current from a cathode terminal of the first body diode to an anode terminal of the first body diode such that no current flows in the first body diode while switching off a component associated with the first body diode; and a second force commutated synchronous rectifier coupled directly to the inductor and the first force commutated synchronous rectifier and comprising a second body diode and operable to eliminate reverse recovery time in the second body diode so there is no reverse recovery time by force commutating a commutation current from a cathode terminal of the second body diode to an anode terminal of the second body diode such that no current flows in the second body diode while switching off a component associated with the second body diode, the first force commutated synchronous rectifier and the second force commutated synchronous rectifier each comprising a field effect transistor (FET) switch coupled in parallel to a force commutation circuit consisting of a commutation diode coupled in series at an anode of the commutation diode to an output terminal of a controlled pulsed current source, and the controlled pulsed current source generates the commutation current greater than an input current into an input terminal of the controlled pulsed current source to eliminate the reverse recovery time.