| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress generation of torque pulsations, while preventing control processing from becoming complex. <P>SOLUTION: A phase corrector 18 corrects detection errors in a magnetic-pole position detector 6 and calculates the magnetic-pole correction angle θofs=atan(Vdc/Vqc), on the basis of a d-axis voltage command value Vdc and a q-axis voltage command value Vqc output from a voltage command generator 15, when it is determines as being in a zero-current state (a state which keeps the rotational angular velocity ω of a motor 3 almost constant), and set up a correction magnetic-pole rotational angle θc (=θact-θofs). The phase corrector 18 refers to the angle displacement map, previously established on the basis of data of torque waveforms for each of a plurality of phase current advance angles for the processing of angle displacement, displaces the correction magnetic-pole rotational angle θc to a magnetic-pole rotational angle θ, and outputs it to a current coordinate converter 12 and to a voltage coordinate converter 16. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
