| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for vector controlling to drive a synchronous reluctance motor without necessity of a salient-pole position angle detector of an encoder or the like mounted at a rotor to solve various problems of reliability, an increase in a capacity, a wiring and increases in various costs due to the detector of the encoder and to particularly a method for vector controlling the motor capable of accurately or efficiently estimating sine and cosine signals of rotation signals for a vector rotary unit. SOLUTION: A magnetic flux vector estimating unit 12a estimates a stator magnetic flux vector in a split shape into an in-phase magnetic flux vector having a same direction as a current vector and a mirror image magnetic flux vector decided as a difference between the stator magnetic flux vector and the in-phase magnetic flux vector by using voltage and current information of the stator. A cosine/sine generator 12b generates sine and cosine values of an intermediate angel of an angle formed between both the magnetic flux vectors of the estimated in-phase and the mirror phase by using both the magnetic flux vectors of the estimated in-phase and the mirror phase, and outputs the sine and cosine values as rotary signals of the vector rotary unit. Thus, a vector control is consisted. |
