| 摘要 |
PROBLEM TO BE SOLVED: To obtain a motor driver employing an inverter in which the conduction noise is suppressed effectively through high frequency switching of inverter for canceling the high frequency current flowing to the earth through the stray capacities of inverter and motor. SOLUTION: A potential variation generator 12 receives the difference between the common mode potential at the AC output terminals u, v, w of inverter section 6 and the output potential (bus n) on the negative side of a rectifier circuit 4 to generate a potential variation varying in reverse phase to the common mode potential. Output from the potential variation generator 12 is connected through a capacitor 13 with an inverter chassis 7 having the output connected through a capacitor 14 with a motor frame 9. |
