AC fan motor driving circuit having detecting current wave...

Details AC fan motor driving circuit having detecting current wave... AC fan motor driving circuit having detecting current wave...

2007-10-16

2007-10-16

Masih, Karen (Department: 2837)

Electricity: motive power systems

Induction motor systems

Primary circuit control

C318S434000, C318S254100, C318S132000, C318S434000, C318S461000, C388S806000, C388S815000

Reexamination Certificate

active

11311274

ABSTRACT:
A driving circuit of an AC fan motor has an AC to DC converter, a current detecting unit, a step-down divider, a motor driving unit, two windings each having many coils and a harmonic wave elimination unit. The AC to DC converter converts AC power to high voltage DC power. The motor driving unit is connected to the step-down divider to obtain low voltage DC power to operate. The two windings are directly connected to the AC to DC converter through the current wave detect unit to obtain the high voltage DC power. Therefore, the current wave detecting unit can response current changes of windings and then an operator can simulate present current wave of the windings to determine the present operating status of the AC fan motor.

REFERENCES:
patent: 2005/0017665 (2005-01-01), Horng et al.

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