Resources Contact Us Home
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
Performance apparatus and electronic musical instrument
Integrated multi-sat LNB and frequency translation module
Light-emitting diode package and method for manufacturing the same
Non-aqueous solution process for the preparation of cross-linked polymers
Control system of substrate processing apparatus, collecting unit, substrate processing apparatus and control method of the substrate processing apparatus
Fuel-based injection control
Spalling utilizing stressor layer portions
  Randomly Featured Patents
Mechanical interlock mechanism for a vacuum contactor
Shuttling throw member for lockset
Expandable speaker enclosure
Developing apparatus, cartridge and image forming apparatus
Electrostatographic method for the production of transfer images
Dispersion compensation method and apparatus
Dispensing bottle
Lightweight bandwidth-management scheme for elastic traffic
Motion-compensated prediction of inter-layer residuals
Tire pressure monitor system tool with vehicle entry system