A new tracking method with FPGA chip for ultrasonic welding system

2009 ◽  
Author(s):  
Kai-Hsing Ma ◽  
Wen-Chung Chang ◽  
Yung-Chun Lee
Keyword(s):  
Ultrasonic Welding ◽  
Tracking Method ◽  
Fpga Chip ◽  
Welding System

Automatic Frequency-Tracking Control for Ultrasound Welding System

2011 ◽  
Vol 204-210 ◽  
pp. 2041-2044
Author(s):  
Kao Feng Yarn ◽  
King Kung Wu ◽  
Kai Hsing Ma ◽  
Wen Chung Chang
Keyword(s):  
High Power ◽  
Tracking Control ◽  
Control Method ◽  
Ultrasonic Welding ◽  
Automatic Frequency ◽  
Frequency Tracking ◽  
Power Ultrasonic ◽  
Fpga Chip ◽  
Working Frequency ◽  
Welding System

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.

Ultrasonic Welding Driver with Class-E Inverter Design

2011 ◽  
Vol 204-210 ◽  
pp. 2071-2074
Author(s):  
Kao Feng Yarn ◽  
King Kung Wu ◽  
Kai Hsing Ma ◽  
Wen Chung Chang
Keyword(s):  
Circuit Design ◽  
Output Voltage ◽  
Ultrasonic Welding ◽  
The Self ◽  
Zero Voltage Switching ◽  
Inverter Circuit ◽  
Zero Voltage ◽  
Welding System ◽  
Voltage Switching ◽  
Class E

A robust circuit design using matching technology to design the ultrasonic welding transducer driver with zero voltage switching is proposed. The feedback output voltage is used to control the oscillator frequency to achieve the self-tracking function. Experimental results exhibit that the Class-E inverter circuit can be effectively and stably applied on the high power ultrasonic welding system.

Sign in / Sign up

Export Citation Format

Share Document