| 摘要 |
PROBLEM TO BE SOLVED: To change easily the current resolution to a power converter device and a motor without equipping any particular device additionally. SOLUTION: A current command value signal is calculated in conformity to an external select signal X, and the result is emitted as one vector signal 24a. Different signal current sensing signals 8a and 8b are amplified and three- phase current vector signals 25a, 25b... are emitted to a current selector 26, and one of the signals 25a, 25b... selected on the basis of the select signal is emitted as an analog current sensing signal 26a to an A/D converter 27, converted into a digital signal 27a, and emitted to a 3-phase/2-phase coordinates convertive calculation part 28. Digital signals of various phases are coordinate converted into two-axis signal 28a using a rotational angle signal 32a given from a position sensing calculation part 32. The signals 24a and 28a are fed to a current control calculation part 29 so that a voltage command signal 29a fed to a 2-phase/3-phase coordinates convertive calculation part 30 is coordinate converted into a three-phase voltage command signal 30a using the rotational angle signal 32a, and the result is emitted to a PWM control calculation part 31. |
