An effective frequency tracking control and balancing compensation between CW & CCW rotation speed techniques for ultrasonic motor

2005 ◽  
Author(s):  
Zhihua Chen ◽  
Chunsheng Zhao ◽  
Weiqing Huang
Keyword(s):  
Tracking Control ◽  
Rotation Speed ◽  
Ultrasonic Motor ◽  
Effective Frequency ◽  
Frequency Tracking

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.

Frequency tracking control of the WPT system based on fuzzy RBF neural network

2021 ◽  
Author(s):  
Yuanyuan Liu ◽  
Fei Liu ◽  
Hongwei Feng ◽  
Guoxin Zhang ◽  
Lu Wang ◽  
...  
Keyword(s):  
Neural Network ◽  
Tracking Control ◽  
Rbf Neural Network ◽  
Frequency Tracking

The Design and Characteristics of a Novel Ultrasonic Motor

2006 ◽  
Vol 514-516 ◽  
pp. 1457-1461
Author(s):  
Kee Joe Lim ◽  
Oh Deok Kwon ◽  
Cheol Hyun Park ◽  
Jong Sub Lee ◽  
Seong Hwa Kang
Keyword(s):  
Finite Element Method ◽  
Applied Voltage ◽  
Piezoelectric Ceramic ◽  
Rotation Speed ◽  
Ultrasonic Motor ◽  
The Other ◽  
Lens System ◽  
Optical Lens ◽  
Rotation Direction ◽  
Auto Focusing

In this paper, the design and characteristics of a novel ultrasonic motor which is applicable to optical zoom or auto focusing operation of lens system for mobile phone are investigated. Its design and simulation of performances are carried out by FEM (Finite Element Method) commercial software. The shape of the motor is like square without one side, which is able to insert optical lens. Two sheets of piezoelectric ceramic are fixed to both sides of the two legs of an elastic body, respectively. To drive the ultrasonic motor, the voltage is applied to the two sheets of piezoelectric ceramic bonded to one leg. The rotation direction can be easily changed by switching the applied voltage to the piezoelectric sheets bonded to the other legs. The proto type of motor is fabricated and its outer size is 10*10*2 mm3 including the camera lens of which the diameter is 7.5 mm. Its power consumption is about 0.3 W and the rotation speed is adjustable from 10 to 200 rpm according to the applied voltage.

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