초록 ▼

An electronic circuit, such as a UPS, interfaces a main ac power source and at least one secondary power source to a load. The secondary power source(s) may include one or more auxiliary generators, a flywheel motor generator or microturbine with high speed motor generator, and/or any of a variety o

An electronic circuit, such as a UPS, interfaces a main ac power source and at least one secondary power source to a load. The secondary power source(s) may include one or more auxiliary generators, a flywheel motor generator or microturbine with high speed motor generator, and/or any of a variety of dc storage devices. The electronic circuit includes a dc bus, a first uncontrolled rectifier in combination with a first filter for coupling the main ac power supply to the dc bus, one or more additional uncontrolled rectifier(s) and filter(s) for coupling the auxiliary generator(s) to the dc bus, and a dc-to-ac inverter (between the dc bus and the load) for providing ac output power to the load. The advantages of reduced parts count, increased compatibility between the generator(s) and the electronic circuit, and a simpler method for paralleling many storage and generation devices with a very high power factor to the sources, regardless of the load power factor, are provided.

대표청구항 ▼

[ What is claimed is:] [1.] An uninterruptible power supply (UPS), comprising:(a) a dc bus;(b) a first uncontrolled rectifier in combination with a first filter for coupling a main ac power supply to the dc bus with a first power factor;(c) a second uncontrolled rectifier in combination with a secon

[ What is claimed is:] [1.] An uninterruptible power supply (UPS), comprising:(a) a dc bus;(b) a first uncontrolled rectifier in combination with a first filter for coupling a main ac power supply to the dc bus with a first power factor;(c) a second uncontrolled rectifier in combination with a second filter for coupling an auxiliary generator to the dc bus with a second power factor; and(d) a dc-to-ac inverter operatively coupled to the dc bus for providing ac output power to a load;wherein the first and second power factors are greater than or equal to approximately 0.95.