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You can't step down 220 volts by using two live wires - that voltage is between phase and neutral and the voltage between phases will be 380 volts, so no cheap 220 volts is there. Note that besides different voltages there's 50 Hz versus 60 Hz issue - your country likely has 50 Hz mains and if you use an ordinary (not switching power supply) transformer it ...


Don't do it. Plugging the fan into 220V will draw twice the current and result in 4 times the power delivered to the motor, so it will spin like crazy. There is risk of overheating, fire, fan blades dislodging and bearings overheating. In some cases the motor can be rewired for a different voltage but it takes a fair bit of experience and knowledge to do ...

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