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
Induction cooking heater and method for the control thereof
Laser processing machine having expanded work space
Mobile phone for authenticating SIM card and method thereof
Reinforced composite structures for aircrafts and methods for making the same
Remote control
High integrity protective coatings
Split termination of secure communication sessions with mutual certificate-based authentication
  Randomly Featured Patents
Integrated circuit comprising a photodiode of the floating substrate type and corresponding fabrication process
Omnidirectional and forward-looking imaging device
Image formats for video capture, processing and display
Hall effect weight transducer
Oil heater
Acylated decasaccharides and their use as antithrombotic agents
Luminescence device and display apparatus
Variable face width gearing
Three dimensional multilayer circuit
Container for shoe care products