Resources Contact Us Home
Forward converter transformer saturation prevention

Image Number 17 for United States Patent #8130517.

A power converter in one aspect limits the magnetic flux in a transformer. A control circuit included in the power converter includes a pulse width modulator, logic circuits and saturation prevention circuits. The saturation prevention circuits assert a first signal when a first integral value of the input voltage reaches a first threshold value and assert a second signal after a delay time that begins when a difference between the first integral value and a second integral value of a reset voltage of the transformer falls to a second threshold value. The logic circuits turn off the switch when the first signal is asserted, and allow the switch to turn on and off in accordance with the pulse width modulator when the second signal is asserted.

  Recently Added Patents
Interconnecting virtual domains
Vending machine
Switching device, switch control method, and storage system
Method and device for determining processed image data about a surround field of a vehicle
Liquid crystal display
Synchronization of communication equipment
Reuse of static image data from prior image frames to reduce rasterization requirements
  Randomly Featured Patents
Load fault detector for high frequency luminous tube power supply
Electric trimmer
Image forming apparatus for forming color image with dry developer
Combination memo pad holder with highlighter
Solvent recovery
Door security system
Low noise integrated MMDS antenna and down converter
Recombinant lipidated PsaA protein, methods of preparation and use
Automatic telephone call computer and display