| 摘要 |
PURPOSE:To shorten the time required for adjustment by changing the speed of an induction motor in a ramplike pattern, and adjusting a secondary resistor R or secondary time constant so that the torque current command or waveform of a real torque current during that may be steplike. CONSTITUTION:A speed controller 50 outputs torque command value TM* so that real motor speed omegar may follow up a speed command omegar*, based on the deviation between the speed command omegar* and the, motor speed omegar obtained by a comparator 54. The waveform of torque current command value iee is stored in a waveform analyzer 51, characteristic quantities such as overshoot, settling time, rise time, etc., are calculated. Then, the characteristic quantities computed by the waveform analyzer 51 are sent to a parameter adjuster 52. And, the parameter adjuster 52 computes the correcting direction (increase or decrease) of a parameter (secondary resistor R2) and its quantity, and corrects the set value of the secondary resistor R2 set in coefficient multipliers 12, 12'. |
