Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Energy conservation circuit and method for use with multi-phase motors used to power a variable load










Image Number 6 for United States Patent #6091218.

An energy conserving apparatus and method are disclosed. The apparatus is used for conserving power supplied to a multi-phase motor used to power a compressor having a high pressure output line. The motor has a plurality of voltage input lines for connection to receive a multi-phase input voltage. The apparatus includes a monitor for connection to monitor a parameter of the high pressure output line. A plurality of voltage limiting circuits in respective ones of the voltage input lines limit a voltage on the input lines to below selectable voltage levels in response to a control signal. A control circuit is connected to the monitor. The control circuit has a plurality of discrete programmed output levels to provide the control signal to the voltage limiting circuits. Each output level corresponds to a range of the parameter values of the high pressure output line, whereby the voltage limiting circuits limit the input voltage in discrete increments in relation to the parameter values in said high pressure output line. The monitored parameter in the case of a gas/fluid compressor may be a pressure or a temperature in the high pressure output line. The control circuit controls the timing for transitions between discrete voltage levels.








 
 
  Recently Added Patents
Wound dressing with a discontinuous contact layer surface
Wire guide
Washing machine
Playlist search device, playlist search method and program
Carbon dioxide capture system and methods of capturing carbon dioxide
Searchlight
Organic electroluminescent element
  Randomly Featured Patents
Apparatus and method for testing and repairing in a cased borehole
Fractal memory and computational methods and systems based on nanotechnology
Programmable sewing machine operable in a plurality of modes
Valve construction
Method for breaking a chain during anionic polymerisation
Circuit for generating control signals
Target nucleic acid amplification/detection systems and methods for the use thereof
Wavelength tuning of photo-induced gratings
Classification scheme for nanoobjects
Method and apparatus for separating substances of different atomic weights using a plasma centrifuge