Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Patent
1995-07-24
1997-02-11
Wong, Peter S.
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
323224, 323282, 307 43, G05F 1445
Patent
active
056024649
ABSTRACT:
A bidirectional power converter array has overall voltage feedback, an error signal generator, and plural bidirectional power converter modules. Each module of the array includes a series inductor and local feedback based upon the inductor current. Each module also has a resistive current sensor, providing wideband local feedback. A low-pass filter is coupled to the current sensing resistor to reduce switching noise. The low-pass filter also reduces the bandwidth of the local feedback signal, so interactions with the overall feedback occur, which may result in instability. A winding transformer-coupled to the series inductor generates AC signal representing high-frequency components of the inductor current, relatively free of switching noise. The AC current sample is added to the low-frequency components derived from the resistor and low-pass filter, to form a low-noise local feedback signal, with sufficient bandwidth to reduce unwanted interactions with the overall system feedback. The feedback signals may be currents summed at a node. The combination of overall voltage feedback which is converted to local current feedback in each module allows modules to be paralleled without any adjustments to the system or to the individual modules.
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Bingley John D.
Linkowsky Frank A.
Berard C. A.
Han Y. J.
Martin Marietta Corp.
Meise W. H.
Wong Peter S.
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