Variable-frequency converter with constant programmed delay

Details Variable-frequency converter with constant programmed delay Variable-frequency converter with constant programmed delay

1996-12-31

1998-04-28

Sterrett, Jeffrey L.

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363 97, 363 21, H02M 7539

Patent

active

057453586

ABSTRACT:
A variable-frequency variable-input-voltage switched-mode power converter, in which a voltage minimum on the primary switching transistor IS estimated as a fixed value which is determined by the time constant of the reactances on the primary side of the converter, and does not vary with the switching frequency. In the presently preferred embodiment, this fixed time-constant-determined delay is used by a secondary-side control subsystem to estimate zero-crossings of the current on the primary side, without using any dissipative current sensing techniques.

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patent: 5528483 (1996-06-01), Mohandes
patent: 5612858 (1997-03-01), Weinmeier et al.

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