| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor controller that allows efficiently driving and controlling a motor by preventing the drop of a voltage.SOLUTION: A motor controller (1) includes an inverter circuit (6), capacitors (8u, 8v, 8w), and bypass circuits (9u, 9v, 9w). The capacitors (8u, 8v, 8w) are respectively connected in series to three-phase AC voltage lines (U, V, W) drawn from the inverter circuit (6), and these lines are connected to a motor (2). The capacitors (8u, 8v, 8w) are respectively equipped with bypass circuits (9u, 9v, 9w) bypassing the capacitors, and switches (10u, 10v, 10w) are interposed in the bypass circuits (9u, 9v, 9w). When the motor (2) is rotated at low speed, the switches (10u, 10v, 10w) are turned ON, and when the motor (2) is rotated at high speed, the switches (10u, 10v, 10w) are turned OFF. |
