Apparatus and method for identifying an unregulated DC bus volta

Details Apparatus and method for identifying an unregulated DC bus volta Apparatus and method for identifying an unregulated DC bus volta

1999-06-10

2000-08-08

Wong, Peter S.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363 97, 323902, H02M 3335

Patent

active

061011053

ABSTRACT:
A method and apparatus for calculating an accurate estimate of an unregulated DC bus voltage to be used with a DC-to-DC converter including a transformer having a primary winding and a secondary winding, the primary winding in series with a switch between the positive and negative rails of the unregulated DC bus voltage, an electrically insulating coupler linked to a switch control line to provide a trigger pulse to a sample and hold circuit, and a sample and hold circuit linked to the transformer secondary winding for measuring the secondary winding voltage when the sample and hold circuit is triggered, the sample and hold circuit providing an output voltage which can be used to calculate the DC bus voltage estimate.

REFERENCES:
patent: 5373195 (1994-12-01), De Doncker et al.
patent: 5483436 (1996-01-01), Brown et al.

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