| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique for efficiently removing a pulsation component by correcting a detection value of a voltage sensor which detects a voltage between both ends of a smoothing capacitor.SOLUTION: In a motor control system 1, a step-up converter 10 is connected to a power supply 21. An inverter 20 is connected to the step-up converter 10 via a smoothing capacitor 23. A voltage sensor 25 detects a voltage value between both ends of the smoothing capacitor 23. A current sensor 26 detects a current value flowing through the smoothing capacitor 23. A ripple correcting unit 60 corrects the voltage value detected by the voltage sensor 25 on the basis of the current value detected by the current sensor 26 and the capacity of the smoothing capacitor 23 when the frequency of a carrier signal used for motor control is less than or equal to a prescribed value.SELECTED DRAWING: Figure 1 |
