Electricity: motive power systems – Limitation of motor load – current – torque or force
Reexamination Certificate
2006-07-12
2009-10-06
Duda, Rina I (Department: 2837)
Electricity: motive power systems
Limitation of motor load, current, torque or force
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
Huang Wen-Shi
Kuo Po-Tsun
Ma Wen-Chuan
Tsai Ming-Shi
Birch & Stewart Kolasch & Birch, LLP
Delta Electronics , Inc.
Duda Rina I
Glass Erick
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