Masters Theses
Abstract
"Current measurement has many applications in power electronics and motor drives. Current measurement is used for control, protection, monitoring, and power management purposes. Parameters such as low cost, accuracy, high current measurement, isolation needs, broad frequency bandwidth, linearity and stability with temperature variations, high immunity to dv/dt, low realization effort, fast response time, and compatibility with integration process are required to ensure high performance of current sensors. Various current sensing techniques based on different physical effects such as Faraday's induction law, Ohm's law, Lorentz force law, magneto-resistance effect, and magnetic saturation are studied in this thesis. Review and examination of these current measurement methods are presented.
The most common current sensing method is to insert a sensing resistor in the path of an unknown current. This method incurs significant power loss in a sense resistor at high output currents. Alternatives for accurate and lossless current measurement are presented in this thesis. Various current sensing techniques with self-tuning and self-calibration for accurate and continuous current measurement are also discussed. Isolation and large bandwidth from dc to several kilo-hertz or mega-hertz are the most difficult, but also most crucial characteristics of current measurement. Electromagnetic-based current sensing techniques, which are used to achieve these characteristics, are analyzed. Many applications require average current information for control purposes. Different average current sensing methods of measuring average current are also reviewed."--Abstract, page iii.
Advisor(s)
Ferdowsi, Mehdi
Committee Member(s)
Chowdhury, Badrul H.
Corzine, Keith, 1968-
Department(s)
Electrical and Computer Engineering
Degree Name
M.S. in Electrical Engineering
Publisher
University of Missouri--Rolla
Publication Date
Fall 2007
Pagination
xi, 110 pages
Note about bibliography
Includes bibliographical references (pages 125-127).
Rights
© 2007 Ashaben Mehul Patel, All rights reserved.
Document Type
Thesis - Open Access
File Type
text
Language
English
Subject Headings
Electric currents -- Measurement
Thesis Number
T 9273
Print OCLC #
235217854
Electronic OCLC #
191820898
Recommended Citation
Patel, Asha, "Current measurement in power electronic and motor drive applications - a comprehensive study" (2007). Masters Theses. 4581.
https://scholarsmine.mst.edu/masters_theses/4581