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
Pre-sealing unit for wire-cut electric discharge machine
System and method for evaluating equipment rack cooling performance
Para-xylylene based microfilm elution devices
Method for conformal plasma immersed ion implantation assisted by atomic layer deposition
Method and system of a sensor interface having dynamic automatic gain control
Device and method for unified codes
Device and method for generating soft tissue contrast images
  Randomly Featured Patents
Microwave preamplifier
Movable body control system for vehicle
High and low pressure fluidblock assembly
System and method for communications and process management in a distributed telecommunications switch
Confined vortex cooling tower
Sealing device
Multiple format video compression
Method of manufacturing microholes in a cathode substrate of a field emission display using anodic oxidation
Laser cutting nozzle, cutting head comprising said nozzle and laser cutting method using said elements
Polymeric light stabilizers for plastics