Noise-immune, clamped, resonant link inverter

Details Noise-immune, clamped, resonant link inverter Noise-immune, clamped, resonant link inverter

1994-11-10

1997-04-01

Wong, Peter S.

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363132, H02M 75387

Patent

active

056173083

ABSTRACT:
A resonant link inverter control for driving a multi-phase induction motor through three feed lines each connected to opposite sides of a DC bus by a pair of switches. A resonant tank circuit connects a source of DC voltage through an inductor to the DC bus and provides a tank capacitor in parallel with the DC bus. A bipolar transistor having an anti-parallel diode, which is in series with a clamp capacitor to form a clamp circuit connected across the tank inductance, is turned off in response to the clamp current bearing a predetermined relationship to voltage across the clamp circuit as well as voltage across the DC source. The current in each feed line is sampled in response to clamp current which is just slightly less than that which causes turnoff of the clamp transistor.

REFERENCES:
patent: 4701671 (1987-10-01), Stupp et al.
patent: 5412557 (1995-05-01), Lauw

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