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Abstract The AC electromagnetic valve is always used in air-conditioning system and refrigerating system, it's compact structure, small volume and totally closed. This paper designs an intelligent control module for the AC electromagnetic valve, and this module uses off-line switched- mode power supply chip as a core. The chip can dynamic self-supply with a few discrete components, and can realize intelligent control of the electromagnetic valve. With the module control, the AC electromagnetic valve can have the functions as follows: AC or DC general use, wide range input voltage, working silent and saving energy, perfect protection performance, etc. The AC electromagnetic valve can start and keep with closed-loop in DC mode without any auxiliary power supply. This paper analyzes the principle of the closed-loop starting. The experimental results verify the validity of the control module. The small module can make the AC electromagnetic valve more robust and improve the service life at a low cost.
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Received: 13 March 2013
Published: 05 November 2014
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2014, Vol. 29 
