| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve control reliability and control accuracy by making it possible to simply calculate a d-axis current command value Id<SP>*</SP>close to a theoretical value in a synchronous motor controller. <P>SOLUTION: As a current command value converter, which calculates a q-axis current command value Iq<SP>*</SP>and a d-axis current command value Id<SP>*</SP>from a torque command value T<SP>*</SP>, it is configured to calculate the q-axis current command value Iq<SP>*</SP>by multiplying the torque command value T<SP>*</SP>by a proportional constant K<SB>TI</SB>, compare this with a reference q-axis current value Iq<SB>base</SB>, calculate the d-axis current value Id<SP>*</SP>as a first linear function of the q-axis current command value Iq<SP>*</SP>, when the q-axis current command value Iq<SP>*</SP>is equal to or lower than the reference q-axis current value Iq<SB>base</SB>. When the q-axis current command value Iq<SP>*</SP>exceeds the reference q-axis current value Iq<SB>base</SB>as a result of the comparison, the converter calculates the d-axis current command value Id<SP>*</SP>as a second linear function of the q-axis current command value Iq<SP>*</SP>. <P>COPYRIGHT: (C)2008,JPO&INPIT |
