| 摘要 |
PURPOSE:To suppress a starting current and a vibration at the time of starting a motor and to smoothly start by initializing the position of a magnet rotor and to then applying a suitable start signal. CONSTITUTION:The position of a magnet rotor 5 is initialized by applying an exciting signal only to the specific phase of an armature winding 4 for a predetermined period after a start command means 10 generates a command and simultaneously increasing a duty ratio as time goes. After the predetermined period is elapsed, a change-over means 7 is converted to drive a motor 3 based on the output signal of a position detection means 6. |
