| 摘要 |
PROBLEM TO BE SOLVED: To properly obtain a control apparatus which controls a servo motor with precise detection. SOLUTION: The control apparatus for the servomotor is provided with an electrically driven motor 1. The control apparatus is provided with detection means 4, 32, 33 which detect its driving or operating. The control apparatus is provided with control means 12 to 14 which generate drive commands Vns on the basis of their detection results Ff, If, Vf and control commands Fc, Vc. The control apparatus is provided with a pulse-width modulation means 150, which performs pulse-width modulation on the basis of the drive commands Vns and which generates a plurality of pulse signals Up, Vp, Wp. The control apparatus is provided with a power conversion circuit 30, which generates the drive current of the electrically driven motor 1, on the basis of the pulse signals. By the pulse-width modulation means 150, the pulse signals are made a free so that the the drive current does not flow at least once at each cycle, and the detection results are sampled in the free state. Thereby, the detection results are always sampled surely in a state that a switching noise does not exist. |
