Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Motor speed control device










Image Number 12 for United States Patent #6031966.

The motor speed control device of the present invention is provided with an FG sensor and a waveform shaping circuit for obtaining N pulse signals (N.gtoreq.1 where N is an integer) in one rotation of a motor so as to control the rotation speed of the motor in accordance with period information of the FG pulse signal outputted from the waveform shaping circuit. The motor speed control device is further provided with an FG nonuniformity correcting circuit for correcting, by using respective period information of a rising edge-falling edge period and a falling edge-rising edge period, periodic nonuniformity of each period. The motor speed control device controls the motor in response to an actual speed error signal whose nonuniformity such as a duty error and a phase error has been corrected by the FG nonuniformity correcting circuit. The described arrangement permits to provide a motor speed control device having a wide control band and a large servo gain capable of accurately controlling the rotation speed of the motor.








 
 
  Recently Added Patents
Apparatus and method for operating valid bit in a wireless communication system
Light-emitting device and illumination apparatus
End ring assembly and method of forming same
Combination light and base
Anti-CEA antibodies
Fluid control system for steerable agricultural implement
Semiconductor transistor device and method for manufacturing same
  Randomly Featured Patents
System for printing information on a mailing medium
Baseball helmet bell
Method of using a distinct flow of computational control as a reusable abstract data object
Method of using 4-(2-(P-((E)-2-(5,6,7,8-tetrahydro-5,5,8,8-tetramethyl-2-naphthyl) propenyl)phenoxy)ethyl)morpholine with cytostatics
Mint plant `Kushal` for late transplanting
Stabilized electroless plating solutions
Containing markers in interleaved relationship
Tool and accessory container with inner grid system
Herbicidal picolinamide derivatives
Support bracket for deep basin