| 摘要 |
PURPOSE: To accelerate the starting time of a cleaner by starting a brushless DC motor to a low-speed region after the power voltage is established, and driving it to the high-speed region in response to an operation instruction. CONSTITUTION: When an electric outlet plug is inserted and the power voltage of a control circuit is established, a current for reference positioning flows, a low-speed synchronous start begins after 1sec elapses, and the brushless operation is started after 2sec elapse. A motor 6 is started to the number of revolutions of N1 to wait for an operation instruction. When the operation instruction is given, the motor 6 is driven to the number of revolutions of N2 in a high-speed region. The motor 6 can be driven to the high-speed region in a short time of 1-2sec, and an unpleasant feeling that the starting time is long is not given to a user. |
