PWM AC Chopper Control of Single-Phase Induction Motor for Variable-Speed Fan Application

Yıldırım D. , Bilgic M.

34th Annual Conference of the IEEE-Industrial-Electronics-Society, Florida, United States Of America, 10 - 13 November 2008, pp.1284-1289 identifier

  • Publication Type: Conference Paper / Full Text
  • City: Florida
  • Country: United States Of America
  • Page Numbers: pp.1284-1289


This work presents a variable speed control method for fan applications. A pulse-width-modulated (PWM) AC chopper changes the effective value of the supply voltage applied to a single-phase induction motor. This variable supply voltage gives the ability to control the speed of the motor. Harmonics generated by the speed control unit are Itered by an input Iter according to EN 61000-3-2 limits for harmonic current emissions standards. Experimental results on a 230V, 210W in-line centrifugal fan for exhaust ventilation application shows that PWM AC chopper is simple and cost effective control method compared to other methods in terms of simplicity and input harmonic content.