Resources Contact Us Home
Ferroresonant three-phase constant AC voltage transformer arrangement with compensation for unbalanced loads

Image Number 7 for United States Patent #4893069.

A ferroresonant three-phase constant AC voltage transformer comprising three transformer iron cores with one for each corresponding input supply phase, primary windings and secondary windings formed on each of the transformer iron cores, series reactance components or reactors connected in series, with the primary windings, automatic voltage regulating means for controlling secondary output voltages generated at the secondary windings to a predetermined target value, compensating windings formed so as to be inductively coupled to each of the series reactance components or reactors, and means for connecting the compensating windings in series with each other to form a closed loop circuit. The secondary output voltages are theoretically kept in balanced condition even when the loads or the primary input voltages or both are unbalanced.

  Recently Added Patents
Image processing unit, image processing method and program
Sporting goal practice screen
Wire guide
Calendar integration methods and systems for presentation of events having combined activity and location information
Transcoded images for improved trick play
Secure data exchange for processing requests
  Randomly Featured Patents
Golf bag
Process utilizing zeolites as catalysts/catalyst precursors
Low latency data packet reception and processing
Eyeglasses with adjustable temples
Circuit for operating a hearing device and hearing device
High density single pass heat exchanger for drying fragmented moisture-bearing products
Imaging member
Flexible stent with improved axial strength
Leukotriene B4 antagonist compounds and method for treatment
Hand gesture recognition input system and method for a mobile phone