Resources Contact Us Home
Control device for electric rotating machine and method of controlling the machine

Image Number 13 for United States Patent #8193743.

A control device has a unit for preparing a pattern having first and second periods by comparing a triangular wave and a sine wave having an amplitude ratio set at each value of a modulation factor, and selecting one pattern corresponding to an instructed modulation factor, and a unit for applying a controlled voltage, set at low and high levels in response to first and second periods of the selected pattern, to a generator. The triangular wave has a cycle duration obtained by dividing the cycle duration of the generator by product of 3 and odd number, a crest having a level higher than the sine wave at a timing of each first period, and a trough having a level lower than the sine wave at a timing of each second period.

  Recently Added Patents
Portable, single member housing cord protector
Providing policy-based operating system services in an operating system on a computing system
Fuel cell module
Laser marking of a card
Portable computer display structures
Method and laser receiver for acoustically indicating a laser beam
Enediyne compounds, conjugates thereof, and uses and methods therefor
  Randomly Featured Patents
Method for reducing heart loads in mammals
Method and apparatus for purifying exhaust gases
Consumer electronics equipment combination consisting of a television receiver and of a video recording and/or reproducing apparatus
Mechanical pencil
Vehicle with load handling apparatus
Winding tool for forming wire coils in a stator stack including radially movable forming members
Estimating vehicle height using homographic projections
Panty or bikini bottom
Hose pump using angularly staggered eccentric disks with projecting stub shafts
Method for forming a product having waved surface by bending a composite material sheet