| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a motor controller capable of, even when a power supply voltage is varied, controlling an induced voltage changing depending on a rotating speed so as not to exceed the power supply voltage, thereby accurately preventing a motor from becoming out of control. <P>SOLUTION: A motor controller uses a current command vector A having a restricting current component that acts so as to restrict an induced voltage and changes corresponding to a direction of the vector A, to control the drive of a motor. Induced voltage information is preliminarily determined based on actual measured values, in which information regarding the plurality of current command vectors A<SB POS="POST">1</SB>to A<SB POS="POST">4</SB>which can generate a desired torque T<SB POS="POST">1</SB>under a certain rotating speed N<SB POS="POST">1</SB>are associated with the induced voltages V<SB POS="POST">1</SB>to V<SB POS="POST">4</SB>which have been restricted by the restricting current components corresponding to respective directions of the current command vectors A<SB POS="POST">1</SB>to A<SB POS="POST">4</SB>, for each rotating speed. Of the plurality of current command vectors A<SB POS="POST">1</SB>to A<SB POS="POST">4</SB>associated with the current rotating speed N<SB POS="POST">1</SB>and the instructed torgue T<SB POS="POST">1</SB>in the induced voltage information, the current command vectors A<SB POS="POST">3</SB>and A<SB POS="POST">4</SB>which restrict the induced voltage to below a current power supply voltage V<SB POS="POST">bat</SB>are then obtained. The drive of the motor is controlled by the obtained current command vectors. <P>COPYRIGHT: (C)2012,JPO&INPIT |
