| 摘要 |
Boost Mode Regulator techniques are used to provide regulated a.c. or d.c. output from a.c. or d.c. sources. One embodiment involves regulation of the output of an a.c. source (53) to provide a regulated d.c. voltage. The source inductance (LA, LB, LC) becomes part of the boost mode circuit, thus avoiding the losses associated with the addition of external inductors. When a three-phase alternator (53) is the power source, the circuit (61) comprises a six diode (D1A, D1B, D1C, D2A, D2B, D2C), three-phase rectifier bridge, three FET transistors (QA, QB, QC) and a decoupling capacitor. The invention involves shorting the output of the power source to allow storage of energy within the source inductance. During this time, the decoupling capacitor (67) supports the load. When the short is removed, the energy stored in the inductances is delivered to the load. Because the circuit uses the integral magnetics of the source to provide the step-up function, the efficiency of the design can be quite high. In another embodiment, the leakage inductance of an isolation transformer is used to provide regulated a.c. or d.c. outputs from an a.c. source and to provide regulated a.c. or d.c. output from a d.c. source. Where a d.c. source is used, chopper circuits are used on the primary side of the transformer. The invention provides for regulation of the output voltage or for maintaining a power factor substantially close to unity.
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