| 摘要 |
PURPOSE:To make it possible to secure the same driving efficiency as in low- speed driving even in high-speed driving. CONSTITUTION:When a motor is driven by using a power converter, which supplies the power into the winding of each phase of the motor 4, a means 20 which inputs a control signal to be fed to a main circuit 3 of a power converter and generates the control signal of a phase leading the input phase, is provided. When the motor is operated at the high speed, the main circuit 3 of the power converter is controlled using the control signal outputted from the above described means. |
