| 摘要 |
A device includes an active rectifier ( 14 ) having control gates controllable to produce an output voltage on a DC bus ( 20 ), a gate control circuit ( 16 ) for producing gate control signals for controlling the active rectifier control gates, a first circuit ( 18 ) connected to the gate control circuit ( 16 ) for producing a command current magnitude signal and a power factor signal for use by the gate control circuit ( 16 ), a current line ( 30 ) providing a signal related to the DC load current to the first circuit ( 18 ), and a voltage line ( 32 ) providing a signal related to the DC bus voltage to the first circuit ( 18 ). The first circuit ( 18 ) includes a command current magnitude signal generator ( 34 ) producing the command current signal based on the DC load current and a power factor controller ( 44, 48 ) producing the power factor signal. The power factor controller ( 44, 48 ) includes a feed forward circuit ( 52, 56 ) for increasing the power factor signal in response to current fluctuations on the current line ( 30 ). Also a method of controlling a voltage on a DC bus with the device.
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