A driving device of a synchronous motor and a blowing device using the same

The invention provides a driving device of a synchronous motor and a blowing device using the same. The driving device is capable of executing synchronism loss detection and preventing synchronism loss under the circumstance of not depending on the precision of a presumption method of a rotor phase. The driving device for driving the synchronous motor comprises an inverter for converting DC power of a DC power supply into AC power, an inverter control unit for controlling the inverter, and an active power detecting unit for detecting the active power of the inverter. By using a power reference value determined by the characteristic value of the synchronous motor and the set value of the inverter control unit, the inverter control unit stops the inverter when the active power detected by the active power detecting unit is over the power reference value.