| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress vibrations and noise of a synchronous machine by reducing both torque fluctuation and a nodal point force in the radial direction of the synchronous machine. <P>SOLUTION: A correction coefficient K which corrects a basic current (a primary frequency current) of each phase of a three-phase synchronous motor is given by a formula of K=[1+qcos(pωt)+rsin(pωt)]. As the coefficients q, r of the correction coefficient K, first coefficients q1, r1 for reducing the torque fluctuation and the second coefficients q2, r2 for reducing the nodal point force in the radial direction can be selectable. In the range where the reduction of the torque fluctuation is emphasized, the first coefficients q1, r1 are selected to set the correction coefficient K. In the range where the nodal point force in the radial direction is emphasized, the second coefficients q2, r2 are selected to set the correction coefficient K. <P>COPYRIGHT: (C)2007,JPO&INPIT |
