| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a motor controller making highly reliable control without causing cost rise. <P>SOLUTION: The motor controller 100 is provided with: a frequency conversion section 6 for converting DC voltage into AC voltage, aiming at a motor 7 as a control target; a PWM control section 5 for controlling a switching element of the frequency conversion section 6 by PWM control; a coil resistance calculating section 10 for calculating a resistance value of a coil equipped on any one of a stator of the motor 7 and a rotor by PWM control based on a voltage command value to be applied to the coil and a coil current flowing when the voltage corresponding to the voltage command value is applied to the coil; and a coil temperature estimating section 11 for calculating a temperature estimation value of the coil based on the resistance value of the coil. <P>COPYRIGHT: (C)2010,JPO&INPIT |
