Print this page Computing Nonlinear Power
Joseph E. Fleckenstein, P.E.
Course Outline
While the currents and voltages in nonlinear circuits cannot readily be described by mathematical expressions, there are recognized methods whereby these variables may be quantified. In this course a graphical method is used to determine the power of a circuit that has nonlinear currents. The method used is called midpoint approximation. The method uses a number of narrow rectangles to approximate the area under the plot of instantaneous power. It is demonstrated that this approach yields accuracies that are more than sufficient for most engineering purposes.
This course includes a multiple-choice quiz at the end, which is designed to enhance the understanding of the course materials.
Learning Objective
At the conclusion of this course a student will:
- Know the difference between a linear and a nonlinear circuit;
- Know how to calculate the root mean square of various functions;
- Understand the significance and limitations of the root mean square of a variable;
- Learn a graphical method that may be used to determining the power of a nonlinear circuit; and
- Know the difference between the power factor of a linear and a nonlinear circuit.
Intended Audience
This course is intended primarily for electrical engineers who at times become involved in the installation, troubleshooting or analysis of electrical systems.
Benefit for Attendee
Attendees will learn a method of calculating the power of a nonlinear circuit.
Course Introduction
Very often nonlinearities in an electrical circuit are benign and of no consequence. On the other hand significant nonlinearities can cause problems of various types. So, there exists a need to calculate the power of notices nonlinearities. Those equations which are applicable to linear voltages and currents are inapplicable to nonlinear variables. This course teaches an easily-understood method of determining the power of a nonlinear circuit.
Course Content
The course content is contained in the following PDF file:
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Course Summary
This course treats a method of determining the power of a nonlinear circuit. The course uses the graphical method of midpoint approximation to calculate the power of a nonlinear plot of any shape.
Quiz
Once you finish studying the above course content, you need to take a quiz to obtain the PDH credits.
DISCLAIMER: The materials contained in the online course are not intended as a representation or warranty on the part of PDH Center or any other person/organization named herein. The materials are for general information only. They are not a substitute for competent professional advice. Application of this information to a specific project should be reviewed by a registered architect and/or professional engineer/surveyor. Anyone making use of the information set forth herein does so at their own risk and assumes any and all resulting liability arising therefrom.
