| 摘要 |
The present invention relates to a fan driving circuit having a positive output-to-load characteristic, and more particularly, to a driving circuit exhibiting a positive output characteristic with respect to load in a fan. The fan driving circuit having a positive output-to-load characteristic according to the present invention comprises a 3-phase induction motor (20) for driving a fan (10), a power unit (30) for applying electric power to the 3-phase induction motor (20), a capacitor C2 (40) which is connected with the 3-phase induction motor (20) to produce a phase difference between two phases, and an impedance unit (50) which is connected in series with the 3-phase induction motor to allow a constant discharge volume of air to be produced even though load imposed on the fan (10) is changed. |
