ECE 3614
FUNDAMENTALS OF ENERGY SYSTEMS
HOMEWORK SET #2
THREE-PHASE POWER
2-1.
A wye-wye balanced three-phase system with a phase voltage of 120 V-rms (positive
phase sequence) has a line impedance of
ECE 3614
FUNDAMENTALS OF ENERGY SYSTEMS
HOMEWORK SET #3
MAGNETIC CIRCUITS
3-1.
Determine the following quantities given the magnetic circuit shown below: (a.) the total
reluctance of the magnetic core
ECE 3614
FUNDAMENTALS OF ENERGY SYSTEMS
HOMEWORK SET #7
INDUCTION MACHINES
7-1.
A three-phase 5 hp, 208 V, 60 Hz induction motor operates at 1737 rpm at rated load.
Determine (a.) the number of poles
ECE 3614
FUNDAMENTALS OF ENERGY SYSTEMS
HOMEWORK SET #6
DC MACHINES
6-1.
Two four-pole 1000 rpm DC machines with rated voltages of 120 V (machine #1) and
240 V (machine #2) are to be designed using th
ECE 3614
FUNDAMENTALS OF ENERGY SYSTEMS
HOMEWORK SET #5
THREE-PHASE TRANSFORMERS / PER-UNIT SYSTEM ANALYSIS
5-1.
A 30 kVA, 460/208 V three-phase transformer is formed using three 10 kVA, 460/120 V
sin
ECE 3614
FUNDAMENTALS OF ENERGY SYSTEMS
HOMEWORK SET #4
TRANSFORMERS
4-1.
An ideal transformer (N1 = 800, N2 = 200) with a primary source of V1 = 2200o V-rms
delivers a complex power of S2 = 230o kVA
ECE 3614
FUNDAMENTALS OF ENERGY SYSTEMS
HOMEWORK SET #1
SINGLE-PHASE POWER
1-1.
The phasor voltage across a load impedance in a 60 Hz single-phase network is 62 30o
V-rms. The phasor current flowing t