| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a synchronous motor controller which can efficiently perform weakish field control, by deciding the need for weakish field control and suppressing the vibration in velocity of a rotor, in a synchronous motor control which drives a synchronous motor by the vector control of a d-q axis, performing weakish field control. <P>SOLUTION: This synchronous motor controller is equipped with a weakish field deciding unit 8 which outputs a weakish field command signal F<SB>s</SB>, based on the difference signal between a weakish field reference signal r<SB>Vref</SB><SP>*</SP>and a voltage vector amplitude command signal r<SB>V</SB><SP>*</SP>; a voltage vector amplitude limiter 9, which inputs the above voltage vector amplitude command signal r<SB>V</SB><SP>*</SP>and outputs a new voltage vector amplitude command signal r<SB>V1</SB><SP>*</SP>; a d-axis current controller 4 which outputs a d-axis voltage command signal V<SB>d</SB><SP>*</SP>, based on the above weakish field command signal F<SB>s</SB>; and a d-axis voltage compensator 7 which outputs a d-axis voltage compensation signal V<SB>dc</SB>, based on the above weakish field command signal F<SB>s</SB>. <P>COPYRIGHT: (C)2007,JPO&INPIT |
