Resources Contact Us Home
Zero voltage switching power converter with secondary side regulation

Image Number 15 for United States Patent #5206800.

A circuit for utilizing the magnetizing current in the transformer of a converter to reset the transformer's core and to provide a zero-voltage-switching condition on the converter's primary switch and to regulate the output voltage is disclosed. The power converter includes a transformer having a primary winding and a secondary winding, the secondary winding being coupled to an output load and a primary switch connected in series between the primary winding and a voltage source. The closing of the primary switch causes energy to be stored in the transformer and the opening of the primary switch causes the energy to be released from the transformer. The utilization circuit includes a series combination of a storage capacitor and a first switch coupled in parallel with one of the transformer's windings to capture the energy released from the transformer. The captured energy is used to reset the transformer's core and to create a zero voltage switching condition across the primary switch. A second switch means is connected in series with the secondary winding of the transformer and is operated to prevent the loading effects of the secondary from interrupting the creation of the zero-voltage switching condition. A secondary side regulation circuit is included to both regulate the output voltage and to prevent the loading effects of the secondary circuit from interfering with zero-voltage switching in the primary circuit.

  Recently Added Patents
Label with surface ornamentation
LO generation with deskewed input oscillator signal
Methods and systems for enabling community-tested security features for legacy applications
Liquid crystal display having wide viewing angle
Security authentication method, apparatus, and system
Heating pad
Differentiated PSIP table update interval technology
  Randomly Featured Patents
Power control slide switch
Steel sheet excellent in coating sharpness, defect-formation resistance and workability
Grapevine plant named `Jupiter`
Scraper flight conveyor for conveying preheated thermoplastic bulk material to a screw extruder
Installation tool for lap siding
Golf bag stand
Apparatus for the determination of unbalance in rotating bodies
Method of manufacturing display device
Computer software for processing medical billing record information
Instrument panel device for vehicles