초록 ▼

A line power unit controls electrical power delivery to a grid from a three phase permanent magnet generator. A line power unit controller receives a power level command and controls a main inverter that draws DC power from a DC bus to deliver the commanded power to a grid. The DC bus is fed DC volt

A line power unit controls electrical power delivery to a grid from a three phase permanent magnet generator. A line power unit controller receives a power level command and controls a main inverter that draws DC power from a DC bus to deliver the commanded power to a grid. The DC bus is fed DC voltage via a three phase permanent magnet generator and a rectifier. The inverter delivers power to the grid via a filter, transformer and main contactor. The line power unit controller also controls the main contactor to break the connection with the grid. A precharge circuit draws power from the grid to precharge the DC bus to a precharge voltage. Alternatives include a start inverter separate from the main inverter that permits simultaneous delivery of power to the grid and commutation of the permanent magnet generator as a motor to spin an engine connected thereto at a speed sufficient to permit engine starting. Another alternative utilizes a single inverter for engine starting and power delivery which does not permit these operations to be simultaneously performed. Further alternatives include eliminating the transformer by utilizing a high-voltage rated main inverter.

대표청구항 ▼

[ What is claimed is:] [1.] A line power unit for controlling electrical power delivery to a grid from a three phase permanent magnet generator, comprising:a full wave rectifier operatively connected to the three phase permanent magnet generator, said full wave rectifier converting a three phase AC

[ What is claimed is:] [1.] A line power unit for controlling electrical power delivery to a grid from a three phase permanent magnet generator, comprising:a full wave rectifier operatively connected to the three phase permanent magnet generator, said full wave rectifier converting a three phase AC voltage from the three phase permanent magnet generator to a DC voltage;a DC bus operatively connected to the output of said full wave rectifier;an inverter operatively connected to said DC bus, said inverter functioning as a current source or as a voltage source and transforming the DC voltage to a controlled three phase alternating voltage;an inductor unit operatively connected to the output of said inverter;a first contactor unit selectively connecting and disconnecting said inductor unit to and from the grid;a line power unit controller operatively connected to said inverter and a power level command input, said line power unit controller receiving a power level command from the power level command input and controlling said inverter to transform the DC voltage to the controlled three phase alternating voltage having the commanded power level; anda precharge circuit operatively interconnecting the grid and said DC bus, said precharge circuit taking power from the grid to precharge said DC bus to a precharge DC voltage.