Power converter control to avoid imbalance and transformer saturation

Patent metadata

Field	Value
Publication number	US-9178441-B2
Application number	US-201414280064-A
Country	US
Kind code	B2
Filing date	May 16, 2014
Priority date	May 17, 2013
Publication date	Nov 3, 2015
Grant date	Nov 3, 2015

Abstract

A switched-mode power conversion circuit can include a switch control circuit including switch control outputs coupleable to switches included in a bridge network, the switches controllably coupling power input nodes to an isolation transformer according to switch states established by the switch control circuit. A current monitoring circuit can be coupled to the isolation transformer, the current monitoring circuit including an output indicative of a current flowing through a winding of the isolation transformer. A sampling circuit can be coupled to the output of the current monitoring circuit to obtain information indicative of a first current peak during a first sampling duration corresponding to a first current polarity established by the bridge network and a second current peak during a second sampling duration corresponding to an opposite second current polarity established by the bridge network.

First claim

The claimed invention is:

1. A switched-mode power conversion circuit, comprising:
a switch control circuit including switch control outputs coupleable to switches included in a bridge network, the switches controllably coupling power input nodes to an isolation transformer according to switch states established by the switch control circuit;
a current monitoring circuit coupleable to the isolation transformer, the current monitoring circuit including an output indicative of a c…

Assignees

• Analog Devices Inc

Inventors

• Daly Michael
• Madiwale Subodh

Classifications

• H02M1/40

  Electricity · mapped topic

• H02M3/3376 Primary

  Electricity · mapped topic