Current control device and method

Electricity: motive power systems – Limitation of motor load – current – torque or force

Reexamination Certificate

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Details

C318S432000, C318S400220

Reexamination Certificate

active

07598691

ABSTRACT:
A current control device for a fan motor includes a current sampling module, a signal generating module, a current detecting module and a current controlling module. The current sampling module samples an operating current of the fan motor to generate a sampled current signal. The operating current is controlled according to a driving signal. The signal generating module generates a threshold current signal. The current detecting module receives the sampled current signal and the threshold current signal and generates a motor protecting signal according to the sampled current signal and the threshold current signal. The current controlling module receives the motor protecting signal and stops generating or decreases the driving signal according to the motor protecting signal.

REFERENCES:
patent: 6650075 (2003-11-01), Otsuka et al.
patent: 6747432 (2004-06-01), Yoshimura

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