Automatic Frequency-Tracking Control for Ultrasound Welding System

Kao Feng Yarn; King Kung Wu; Kai Hsing Ma; Wen Chung Chang

doi:10.4028/www.scientific.net/AMR.204-210.2041

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 204-210Automatic Frequency-Tracking Control for...

Automatic Frequency-Tracking Control for Ultrasound Welding System

Abstract:

A new frequency-tracking control method to catch the optimal working frequency for the high power ultrasonic welding system is proposed. In a high power ultrasonic resonant system, the induced high temperature will change the working frequency. Therefore, the proposed control method to track the optimal working frequency becomes very attractive and important. This control method is practically implemented by a FPGA chip which basically includes two logic circuits. One logic circuit is to find the optimal working frequency automatically and the other one is to adjust the working frequency by detecting the working current simultaneously. Experimental results exhibit the new method can effectively control and track frequency for high power ultrasonic welding system.

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Periodical:

Advanced Materials Research (Volumes 204-210)

Pages:

2041-2044

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.204-210.2041

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Online since:

February 2011

Authors:

Kao Feng Yarn, King Kung Wu, Kai Hsing Ma, Wen Chung Chang

Keywords:

Field-Programmable Gate Array (FPGA), Frequency-Tracking, Ultrasound Welding, Working Frequency

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