| 摘要 |
The device has a control unit (2) connected to a power stage (1) that is connected to windings (B1, B2) of a motor (M). A switch mode power supply (3) supplies power to the unit. The stage has electromechanical relays (R1, R2) for assuring a connection between a phase (P) of mains supply and an up conductor or down conductor (D) connected to the windings according to signals emitted by the unit. The supply is connected between the phase and a neutral (N) or one of the conductors. A selection unit is provided in upstream of the supply to select the neutral or one of the conductors. |
