US Patent No. 9,907,205

HEAT DISSIPATION SYSTEM AND METHOD FOR STABLIZING THE HEAT DISSIPATION SYSTEM


Patent No. 9,907,205
Issue Date February 27, 2018
Title Heat Dissipation System And Method For Stablizing The Heat Dissipation System
Inventorship Kun-Min Chen, Hsinchu (TW)
Chien-Sheng Wang, Taichung (TW)
Yin-Kai Chen, Hsinchu (TW)
Ching-Feng Lai, Taipei (TW)
Assignee ANPEC ELECTRONICS CORPORATION, Hsinchu (TW)

Claim of US Patent No. 9,907,205

1. A heat dissipation system, receiving a fan control signal from a control module, comprising:
a first fan module, including:
a first fan; and
a first fan driving circuit, generating a fan driving signal to drive the first fan;
wherein when the control module transmits a stopping signal to the first fan module, the first fan driving circuit decreases
a duty cycle of the fan driving signal driving the first fan according to the stopping signal;

wherein when the duty cycle of the fan driving signal driving the first fan is less than or equal to a first predetermined
duty cycle, within a first working time, the first fan driving circuit decreases the duty cycle of the fan driving signal
driving the first fan to zero by subtracting one predetermined duty interval from the duty cycle of the fan driving signal
driving the first fan every predetermined working time interval.