| 摘要 |
<P>PROBLEM TO BE SOLVED: To compute the estimate of the output torque of a motor by making the profile of the current waveform for one cycle in electric angle, and using not only an instantaneous current value but also the profile of this current waveform. <P>SOLUTION: This system detects a current flowing to the winding of the motor with a current sensor 60, and samples the output of the current sensor 60 covering one cycle in electric angle. At sampling, this performs the sampling while judging the angle of a rotor at sampling, and gets the sampling values for one cycle in electric angle and the angle θ of a rotor at sampling without excess and deficiency for one cycle in electric angle. The sampling value for one cycle in electric angle and the angle of the rotor at sampling show the profile of the waveform of a current flowing to the winding of the motor. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
