Electric fan natural wind control circuit diagram

Published:2011/9/26 1:11:00 Author:Rebekka | Keyword: Electric fan, natural wind control | From:SeekIC

The nucleus of electric fan natural wind control circuit is an indirect feedback astable multivibrator. The circuir is composed of time-base integrated circuit and PTC thermistor, NTC thermistor. Indirest feedback type astable multivibrator circuit. 2.5.2 The main device choice. The fan natural wind autoregulate circuit uses RT1 NTC thermistor with B value in 5600K. Room temperature resistor is 51KΩ; RT2's room temperature is20~30℃, temperature coefficient is 12%/℃, room temperature resistance is 470KΩ. C should choose good insulation and small leakage current Tantalum electrolytic capacitor. CD6, VD7 choose small reverse current switch diode. The choice of VS is decided by the power of the electric fan. It is available for the 60W below fan.



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