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

Image Number 11 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
Video processing system and device with encoding and decoding modes and method for use therewith
Color LED display device without color separation
Method and system for providing geohazard information to customers
Systems, methods and apparatus for payment processing
Magnetic resonance imaging apparatus
System and method for distributed security
Optical coherence tomography with multiple sample arms
  Randomly Featured Patents
Power amplifier
Method of identifying a substance by infrared imaging
Electrostatic and vacuum chucking holding apparatus
Method using lignosulfonates for high-temperature plugging
Gravel packing system with fracturing and diversion of fluid
All-tap fractionally spaced, serial rake combiner apparatus and method
Canopy luminaire
Multiprocessor system and control method therefor
Multistage linear amplifier for a wide range of input signal levels
Chest shield