| 摘要 |
A constant frequency, DC/AC inverters that employs a coupled inductor to achieve ZVS in a wide range of load current and input voltage with a reduced circulating energy. In the circuits of the invention, the two windings of the coupled inductors are connected in series and their common terminal is connected to one end of the primary winding of the isolation transformer, which has the other end of the primary winding connected to ground. Each of the other two terminals of the coupled inductors is coupled to the midpoint of the corresponding bridge leg through a series connection of the resonant inductor and a resonant or blocking capacitor. For non-isolated inverter implementations, the common terminal of the coupled inductor is connected directly to the load. The output voltage regulation in the inverters is achieved by a constant-frequency phase shifted control. |
