| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a motor control device capable of avoiding thermal demagnetization of permanent magnets of a permanent magnet synchronous motor caused by overheating. <P>SOLUTION: A q-axis current and d-axis current detection unit 11 detects a q-axis current I<SB POS="POST">q</SB>and a d-axis current I<SB POS="POST">d</SB>on the basis of a U-phase current I<SB POS="POST">U</SB>, a V-phase current I<SB POS="POST">V</SB>, a W-phase current I<SB POS="POST">W</SB>and a rotation angle θ of a rotor 52. A q-axis current command value generation unit 12 generates a q-axis current command value I<SB POS="POST">qcom</SB>on the basis of a speed command value ω<SB POS="POST">com</SB>. A d-axis current command value generation unit 13 generates a d-axis current command value I<SB POS="POST">dcom</SB>, at which the amount of rise in the temperature of permanent magnets 54a, 54b, 54c, 54d in a steady state of a permanent magnet synchronous motor 5 is minimized, on the basis of a rotation speed ω of the rotor 52. <P>COPYRIGHT: (C)2013,JPO&INPIT |
