Resources Contact Us Home
Power conversion apparatus and method and automobile

Image Number 13 for United States Patent #7659689.

An apparatus and method for supplying a polyphase (AC) alternating current motor with driving voltages. A conversion unit is coupled to phases of the polyphase AC motor and includes a plurality of switching devices and includes, in at least one phase, a first switching device between a bus of an AC power supply and an output terminal, a second switching device between a bus of a direct current (DC) power supply and the output terminal, and a third switching device between a common bus for the AC power supply and the DC power supply and the output terminal. Driving voltages for the polyphase AC motor are generated by selecting a voltage from among voltages having potential values corresponding to the AC power supply and the DC power supply, and the selected voltage is used to operate a switch of the plurality of switching devices.

  Recently Added Patents
Systems and methods for generating a user profile based customized media guide with user-generated content and non-user-generated content
Light transformation particle and photobioreactor
System and method for improving text input in a shorthand-on-keyboard interface
Catalysts and process for producing aldehydes
Interferer region identification using image processing
Controlling ring-back tone output prior to a communication connection in mobile terminal
Light-reflective anisotropic conductive paste and light-emitting device
  Randomly Featured Patents
NMR Spectroscopy
Method and apparatus for improving accuracy in ultrasonic echo ranging systems
Propulsion system for scuba diver
Digital filter system with anomaly detection and indication
Ultrasonic motor and electronic apparatus having ultrasonic motor
Distributed cache between servers of a network
Pre-treatment of low-k dielectric for prevention of photoresist poisoning
Process for conditioning the copper or copper-alloy external surface of an element of a mold for the continuous casting of metals, of the type including a nickel plating step and a nickel remo
Extrusion laminating substrate with adhesive of olefin polymer and polyepoxide
Display device