Typical Fan-Use Electronic Speed Governor Circuit

Published:2011/5/19 22:25:00 Author:Robert | Keyword: Fan-Use, Electronic, Speed Governor | From:SeekIC

Most traditional fan speed governors are designedwith the capacitive voltage divider method. This method makes their adjustable gear stages less. By using the electronic control method shown in the picture below, it can get stepless speed regulating results. For the control to inductive fan it must make the bidirectional thyristor in parallel with a rc buffer network to limit the voltage rising rate (dv/dt). The c2 in the picture is used to limit the value beyond bidirectional thyristor's dv/dt value. The r1 is used to limit the c2's impact current when the thyristor is connected, and also it would weaken the damping oscillation between c2 and ll.



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