| 摘要 |
<p>PURPOSE: An electric damper is provided to open a cover by driving a motor when power is supplied and simultaneously charge a super condenser at a low speed so that the cover is closed through driving the motor by using the charged power in case of a blackout. CONSTITUTION: An electric damper comprises a trance(T1), a rectifier(D1), a motor, a super condenser, and a oscillator(U3). AC power is supplied to the trance from outside so that the voltage is dropped. The rectifier commutates the AC power in which the voltage is dropped in the trance, thereby outputting DC power. The AC power is supplied to motor through a forward direction terminal and reverse direction terminal, thereby rotating toward the forward or reverse directions. The super condensor charges the DC power output through the rectifier. The oscillator converts the DC power charged in the super condenser into the AC power.</p> |
