Prof. Frank Merat, P.E.
This Web site is used for distribution of the notes for my EIT (Fundamentals) and PE (Principles)
CWRU contact information: Frank Merat, [email protected], Glennan 518,VOIC
Complex power, power factor, power factor correction . 1
Ideal Transformers. 5
Complex power, power factor, power factor correction
For sinusoidal signals the power factor is defined by
where q is the phase a
What is the binary (base-2) representation of (135)10?
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Guidelines for the Lab Notebook
Each student is required to maintain a laboratory notebook (e.g. "Lab Notebook" from Nation
Brand or a similar bound notebook) which is used to take notes during the lab session, record,
data, circuit analyses, calculations
EGR235 SPRING 2014 EQUATION SHEET
Voltage, Current, Resistance
Ohms Law and Power
KVL & KCL
VDR & CDR
V = IR [V] I =
P = IV = I 2 R =
= out 100%
VDR: series resistors
KVL (Closed Loop)
V = 0 or E RISE = V DRO
Parallel AC Circuits
Compute the total impedance for AC parallel
Apply Kirchhoffs Current Law and the
current divider rule to AC parallel circuits.
Graph impedance, voltages and current as
function of phase.
Thevenins Theorem and Max Power Transfer
A Practical Exercise
1. Review the concept of Thevenins Theorem for determining the Thevenin equivalence of a
DC series/parallel circuit for the standpoint of a two terminal load.
2. Review how t
A Practical Exercise
1. Review how to operate the oscilloscope.
2. Review how to measure a DC voltage signal with the oscilloscope.
3. Introduce how to capture and display an electrical signal with
POWER FACTOR CORRECTION LAB
Background: Power factor correction involves adding a component in parallel with the network
to create a power factor closer to unity. Nearly all power systems operate at a lagging power
factor since ubiquitous AC induction m
AC Series Lab
Equipment: Function Generator, Digital Oscilloscope, Resistor, Inductor,
misc. wires, scope probes.
Impedance of Inductor (L1)
Total impedance (ZT)
Inductor voltage (VL)
Actual Inductance (L1)