| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress vibration and noise of a synchronous machine, by reducing the variations in the torque or radial node force of the synchronous machine. <P>SOLUTION: Basic current (primary frequency current) in each phase of a three-phase synchronous motor is multiplied by a correction coefficient K=[1+qcos(pωt)+rsin(pωt)] and corrected, and drive control of the synchronous motor is carried out by using the correction current. The coefficient q in the correction coefficient K has a value, obtained by reversing the sign of the ratio of real part of p-order component in the result of Fourier transformation of the radial node force waveform, when the basic current is applied to the total sum of difference between average radial node force, when three-phases are applied simultaneously and when two-phases are applied simultaneously. The coefficient r has a value, obtained by reversing the sign of the ratio of imaginary part of p-order component, in the result of Fourier transformation of a radial node force waveform, when basic current is applied to the total sum of the difference between average radial node force, when three-phases are applied simultaneously and when two-phases are applied simultaneously. <P>COPYRIGHT: (C)2007,JPO&INPIT |
