| 摘要 |
<P>PROBLEM TO BE SOLVED: To make it possible to reduce a switching loss even when a phase difference between a voltage command and a current command relating to a three-phase inverter circuit is large. <P>SOLUTION: A motor control device 11 includes: a three-phase inverter circuit 17 of a two-phase modulation system connected to a DC power supply 13; and a vector control part 19 for performing vector control of a three-phase synchronous motor 15 using the three-phase inverter circuit 17. The vector control part 19 has a first control mode, in which a section of a stationary phase relating to two-phase modulation is determined using a phase of a voltage vector on a d-axis and a q-axis, and a second control mode, in which the section of the stationary phase relating to the two-phase modulation is determined using a phase difference between a current vector and the voltage vector on the d-axis and the q-axis, and performs vector control of the three-phase synchronous motor 15 while performing switching between the first control mode and the second control mode. <P>COPYRIGHT: (C)2013,JPO&INPIT |
