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Advantages of Variable Speed Motors
Danfoss AKD Variable Speed Drives
Overview
Most motors are designed to operate at a constant speed and provid
Capacitors in parallel: Like resistors in series
Capacitors in series : Act like resistors in parallel
Inductors in parallel: add like resistors in parallel
Inductors in series: add like resistors in series.
General notes:
Capacitor Voltage Vc(t)= Vc(t0)+
1.
In causal LTI systems, the condition of 'initial rest' specifies that the output must be zero up till
the time the input becomes non-zero.
Answer
True
False
1 points
Question 2
1.
The number of auxiliary conditions required to determine the 'N' coeffic
Schematic 1 (Original Circuit)
Schematic 2 (Current Contribution (I0) from Voltage Source)
Schematic 3 (Current Contribution (I0) from Current Source 1)
Schematic 4 (Current Contribution (I0) from Current Source 2)
1. The Fourier series is a representation for_ .
Answer
a. periodic continuous-time signals
b. periodic discrete-time signals
c. aperiodic continuous-time signals
d. aperiodic discrete-time signals
2. The Fourier series _ equation tells us how to build x(
1.
Convolution can be performed in both continuous- and discrete time.
Answer
True
False
1 points
Question 2
1.
The output y(t) = x(t) * h(t) in continuous-time represents the convolution sum.
Answer
True
False
1 points
Question 3
1.
Discrete-time signals
1.
A system output (either continuous- or discrete-time) is defined by y = x*(h*h i). This system is
invertible when hi is equal to:
Answer
a. h
b. h-1
c. h2
d. Neither a. b. c.
1 points
Question 2
1.
Convolution (in both continuous- and discrete-time) ha
1.
A band limited, continuous-time signal x(t) has equally spaced samples x(nT), for n = 0, 1, 2,.,
where T denotes the sampling period. s is the sampling frequency and M is the highest
frequency. The original signal x(t) is uniquely recoverable from its
The Fast Fourier Transform (FFT)
and MATLAB Examples
Learning Objectives
Discrete Fourier transforms (DFTs) and their relationship
to the Fourier transforms
Implementation issues with the DFT via the FFT
sampling issues (Nyquist criterion)
resolution in t
FastFourierTransformand
MATLABImplementation
by
WanjunHuang
for
Dr.DuncanL.MacFarlane
1
Signals
In the fields of communications, signal processing, and in electrical engineering
more generally, a signal is any timevarying or spatialvarying quantity
This v
Magnetic Resonance Imaging:
Basic Principles and Biomedical Applications
Mon. Fri. Rm. NE2.M115
10:00 A -11:30 AM
Lecture# Date
Topic
Instructor
1
Tuesday,8th January
Introduction, Freq. selecting and Freq shaping filters
Dr. Vikram Kodibagkar
2
Tuesday,
Learning the Meaning of Neural Spikes Through
Sensory-Invariance Driven Action
Yoonsuck Choe and S. Kumar Bhamidipati
Department of Computer Science
Texas A&M University
College Station, TX 77843-3112
cfw_choe,[email protected]
Abstract
What does a spike o
Assignment #3
This assignment is due on September 18th (Tuesday) at 7:30PM. You can hand me the hard
copy of the assignment before the start of class on this day. You are also expected to upload
an electronic versi
Assignment # 3
This assignment is worth 10 points and has to be submitted in hardcopy and also uploaded on
BlackBoard by 7:30 pm Nov 20 (Tuesday)
1) An aircraft is powered by a solid propellant. The burning rate of
Original Circuit:
Question 1: In order to find the VOC for the circuit, we needed to set the resistance to a
very high value in order to simulate an open circuit. Therefore, the circuit and respective
voltage looks like and we can see that the VOC voltage
In conscious movements, reflex systems
are:
Answer
S
e utilized
l
e
c
t
e
d
A
n
s
w
e
r
:
Question 2
10 out of 10 points
With the muscle
spindle reflex,
spindle stretch
generally leads
to:
Answer
Selected Answer:
Question 3
10 out of 10 points
Postural re
electrical-engineering-portal.com
http:/electrical-engineering-portal.com/assemblies-of-switchgearand-control-panels-part-1
Assemblies of switchgear and control
panels (part 1)
Assemblies of switchgear and control panels (on photo SKEMA LV Switchgears)
Wh
electrical-engineering-portal.com
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Assemblies of switchgear and control
panels (part 2)
Assemblies of switchgear and control panels (part 2) - on photo SKEMA Switchge
electrical-engineering-portal.com
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Assemblies of switchgear and control
panels (part 3)
Assemblies of switchgear and control panels
Continued from 2nd part of article
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Definition of Harmonics and Their Origin
Definition of harmonics and their origin
Distortion of a sinusoidal signal
The Fourier theorem state
electrical-engineering-portal.com
http:/electrical-engineering-portal.com/functions-performed-byelectrical-switchgear
Functions Performed by Electrical
Switchgear
Functions Performed by Electrical Switchgear (on photo Blokset switchboard withdrawable
unit
electrical-engineering-portal.com
http:/electrical-engineering-portal.com/en61800-3-iec1800-3adjustable-speed-electrical-power-drive-systems
EN61800-3 (IEC1800-3) Adjustable speed
electrical power drive systems
EMC product standard including specific test
electrical-engineering-portal.com
http:/electrical-engineering-portal.com/lt-medium-ht-vfd-part-1
LT / Medium / HT VFD Used In the Industry
(part 1)
LT / Medium / HT Variable Frequency Drives (VFD) In the Industry
Introduction
In modern plants, there are
electrical-engineering-portal.com
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LT / Medium / HT VFD Used In the Industry
(part 2)
The addition of variable frequency drives will provide the pump station with efficient operation,
which wi
electrical-engineering-portal.com
http:/electrical-engineering-portal.com/an-overview-of-smartpower-grid
An Overview Of Smart Power Grid
An Overview Of Smart Power Grid
Abstract
The present electric grids use the technology of 1970s.
The present electric
electrical-engineering-portal.com
http:/electrical-engineering-portal.com/switchboard-constructionsiemens-basics
Switchboard Construction Siemens Basics
Power
Siemens - Sivacon Low Voltage Switchgear
distribution systems are used in every residential, com
electrical-engineering-portal.com
http:/electrical-engineering-portal.com/the-best-applications-forvfds
The Best Applications For VFDs
The most commonly used motor in building
HVAC applications is the three-phase,
induction motor, although some smaller
ap