FLYBACK CONTROLLER FEATURING BIDIRECTIONAL POWER CONTROL AND PARALLELLY-CONNECTED POWER MODULES

摘要

A flyback controller featuring bidirectional power control and parallelly-connected power modules is based on flyback DC-DC converters for allowing bidirectional energy flow and transformation. The flyback controller includes two bidirectional DC-DC converters that are connected in parallel. The bidirectional DC-DC converters are electrically connected with a digital-signal processor. The digital-signal processor controls the bidirectional DC-DC converters and current thereof, so that the current flows evenly across the bidirectional DC-DC converters. Thereby, the flyback controller has advantages about simplified components and increased power output, and is suitable for testing secondary batteries.

主权项

1. A flyback controller featuring bidirectional power control and parallelly-connected power modules, the flyback controller comprising:
a first bidirectional DC-DC converter comprising a first capacitor, the first capacitor being connected in series with a first FET, the first FET being connected in parallel with a first diode, the first FET and the first diode being further connected in series with a first inductor, the first inductor being connected in parallel with a primary side of a high-frequency transformer, the first inductor being connected in series with the first capacitor, the high-frequency transformer having a secondary side connected in parallel with a second inductor, the second inductor being connected in series with a second FET, the second FET being connected in parallel with a second diode, the second FET and the second diode being further connected in series with a second capacitor, and the second capacitor being connected in series with the second inductor; and a second bidirectional DC-DC converter being connected in parallel with the first bidirectional DC-DC converter, the second bidirectional DC-DC converter comprising a first capacitor, the first capacitor being connected in series with a first FET, the first FET being connected in parallel with a first diode, the first FET and the first diode being further connected in series with a first inductor, the first inductor being connected in parallel with a primary side of a high-frequency transformer, the first inductor being further connected in series with the first capacitor, the high-frequency transformer having a secondary side connected in parallel with a second inductor, the second inductor being connected in series with a second FET, the second FET being connected in parallel with a second diode, the second FET and the second diode being further connected in series with a second capacitor, and the second capacitor being further connected in series with the second inductor; whereby, the parallelly connected first and second bidirectional DC-DC converters amplifies an output power, and the second FET together with the second diode makes a current flow form the secondary side of the high-frequency transformer toward the primary side of the high-frequency transformer, so that the first bidirectional DC-DC converter and the second bidirectional DC-DC converter achieve bidirectional power flow.