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
Methods and apparatuses for configuring and operating graphics processing units
Method and apparatus for power management control of an embedded memory having sleep and shutdown features
Method of fabricating solid electrolytic capacitor and solid electrolytic capacitor
State detection device, electronic apparatus, measurement system and program
Performance apparatus and electronic musical instrument
Control strategies for a multi-mode drive system
System and method for combined I/Q generation and selective phase interpolation
  Randomly Featured Patents
Photocathode having ultra-thin protective layer
Electronic-injection fuel-supply system
Method for manufacturing a bakery cutting device
Isolated polynucleotide for novel G-protein coupled receptor
Variable area fuel cell cooling
In-wall iPad dock
Changeable neon letters
Method and apparatus for measuring the droplet frequency response of an ink jet printhead
Process for preparing polyolefin
Optically active, substituted 1,4-dihydropyridines and their use as medicaments