| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric motor control device with high protection reliability, which makes an electric power converter compact at a low cost, by stabilizing the potential of its DC neutral point to the ground, in the electric motor control device, in which a plurality sets of inverters are connected to a common converter. SOLUTION: The electric motor control device, which converts AC power to DC power, is constituted of the common converter 11 which has the DC neutral point as the DC middle circuit; the plurality of sets of inverters 14, which invert DC power converted by the 11 to AC power, and respectively have the DC neutral points as the respective middle circuits; and the respective DC neutral points of the 11 and the 14 are grounded via a serial-parallel circuit of a fuse 19, an impedance element 17 and impedance element 20. |
