A high accuracy and high bandwidth current sense circuit for digitally controlled DC-DC buck converters

2016 ◽  
Author(s):  
David Stack ◽  
Anthony Kelly ◽  
Thomas Conway
Keyword(s):  
High Accuracy ◽  
Buck Converters ◽  
Digitally Controlled ◽  
High Bandwidth

A Torque-Sensorless Viscometer for Food Processing Applications

2019 ◽  
Vol 888 ◽  
pp. 66-71
Author(s):  
Y. Jiang ◽  
S. Hashimoto ◽  
Y. Yamakoshi ◽  
Takashi Otomo
Keyword(s):  
Nursing Care ◽  
Food Processing ◽  
Low Cost ◽  
Estimation Method ◽  
High Accuracy ◽  
Estimation Accuracy ◽  
Rotational Viscometer ◽  
Food Management ◽  
Digitally Controlled ◽  
Torque Transducer

Our study aims to develop a small handy low-cost viscometer for nursing care food management. There are many methods to measure the viscosity of a fluid. In this research, the rotational viscometer employing the observer-based method instead of the actual torque transducer has been developed. The digitally controlled motor has been used to estimate the viscosity in real time with high accuracy. In order to verify the effectiveness of the developed viscosity estimation method, a prototype viscometer has been constructed and tested the viscosity estimation accuracy with standard liquids. As a result, the viscosity accuracy is equivalent to that of the conventional torque transducer-equipped viscometer.

FPGA-Based Expert PID Controller for Buck DC-DC Converter

2013 ◽  
Vol 431 ◽  
pp. 215-220 ◽  
Author(s):  
Yao Chen ◽  
Chang Yuan Chang ◽  
Yan Yan
Keyword(s):  
Pid Controller ◽  
Stable Steady State ◽  
Buck Converters ◽  
Steady State Response ◽  
Control Laws ◽  
State Response ◽  
Digitally Controlled ◽  
Expert Theory ◽  
Expert Pid ◽  
Better Than

In this paper, an expert PID controller used for digitally controlled DC-DC buck converters is proposed. It is designed bycombing expert theory with traditional PID theory, basing on the controlled objects and the knowledge of control laws. The controller uses the expert experiences to regulate the PID parameters online according to the dynamic characteristics of the system. The simulation and practical results indicated that, comparing with conventional PID controller, the expert PID controller which has faster startup transient response, smaller overshoot and more stable steady-state response, is better than conventional PID controller. It is well fit for the demand of control system.

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