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Topic: Phasors


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In the News (Mon 28 Dec 09)

  
  Phasors
The phasor representation of the sum of sinusoidal functions is the sum of phasors representing individual sinusoidals.
V is the phasor representing the derivative of the sinusoidal function.
The phasor representation of the derivative of a sinusoidal is j
www.ele.uri.edu /~daly/342/phasors/phasors.html   (196 words)

  
 Phasors and Waves
A phasor is a line on a complex plane that represents a wave at the location x = 0.
The initial angle of the phasor is the phase constant.
The phasor rotates clockwise with the frequency of the wave.
www.rit.edu /~uphysics/Physlets/phasors.html   (167 words)

  
 Circuit Analysis
Phasors in linear circuits are related if all of the signals in the circuit are at the same frequency.
The sum voltage - represented as a phasor - is equal to the sum of the other two voltages - represented as phasors.
Phasors are used extensively in AC circuit analysis.
www.facstaff.bucknell.edu /mastascu/eLessonsHTML/Freq/Phasors.htm   (796 words)

  
 Harmonic Phasors and Fourier Series   (Site not responding. Last check: 2007-10-22)
For graphical representation, projection on the real (horizontal) axis is inconvenient, and therefore we rotate phasors by p/2 radians and project on the vertical axis.
Two periods of the corresponding phasor and cosine waveform will be shown with a convenient frequency w.
Of course in practice the infinite sum is truncated to a finite number of terms.
www.jhu.edu /~signals/phasorlecture2/indexphasorlect2.htm   (943 words)

  
 Visualizing Phasors   (Site not responding. Last check: 2007-10-22)
Phasors are a very useful technique for conceptualizing sinusoidally oscillating electrical quantities.
A phasor is simply a vector in the complex plane usually defined by its magnitude and phase.
To show the current and voltage phasors in action, hit one of the three "Calculate" buttons at the bottom of the page, for now it doesn't matter which one.
www.swarthmore.edu /NatSci/echeeve1/Ref/phasors/phasors.html   (332 words)

  
 [No title]   (Site not responding. Last check: 2007-10-22)
All modulators are time based meaning that the underlying phasors modulate at the same rate regardless of the CPU speed of the host.
Transitions between rotation speeds are orchestrated by slowly changing the rotation speed of the phasor from the old speed to the new using a sinusoidal-based scale factor based on a time input parameter (nice smooth tranistions).
Each phasor in the model essentially contains two additional phasors of unity amplitude that are used to indepently modulate the X and Y phase components of the containing phasor.
orbital.encapsule.com /~cdr/wtl/spiross_dell_24_readme.txt   (406 words)

  
 phasors   (Site not responding. Last check: 2007-10-22)
The phasors are rotating anticlockwise as indicated by the arrowed circle.
The length of the phasors is determined by the amplitude of the voltages A and B. Since the voltages are of the same value then their phasors are of the same length.
If voltage A was half the voltage of B then its phasor would be half the length of B. All this has nothing to do with "set your phasors on stun".
ourworld.compuserve.com /homepages/g_knott/elect273.htm   (329 words)

  
 8-Phase PSK modulator - Patent 4168397
fifth means combining the first and second pairs of constant amplitude vector signals for producing a resultant vector signal which individually generates phasors of the 8-phase signal set as the control signals and thus the phases of the first and second pairs of vector signals assume different values.
Apparatus according to claim 2 wherein said fourth means comprises sixth means for shifting the phase of the first carrier signal by x45.degree., where x is odd, to produce a second carrier signal for causing the first and second 4-phase signal sets to operate x45.degree.
In such systems, a number of phasors or vector signals of the same frequency and amplitude and of different prescribed phases are required.
www.freepatentsonline.com /4168397.html   (3252 words)

  
 INFORMATION ON PHASORS SOFTWARE
  (Site not responding. Last check: 2007-10-22)
Interactive simulation of phasors rotating in the complex plane, projected into voltage vs. time graph.
PHASORS was written by Professor Richard Sanford, ECE Dept., Clarkson University, Potsdam, NY 13676.
The real parts of these phasors generate sinusoidal waves, which are shown to the right of the rotating phasors.
uhaweb.hartford.edu /eetsw/phasors.html   (224 words)

  
 Phasor - Wikipedia, the free encyclopedia
In physics a Phasor describes the phase of a particle in a simple harmonic motion or a wave motion.
In electronics a Phasor is a quantity with magnitude and phase (which is measured with respect to a fixed reference) usually represented as a complex number.
This is a disambiguation page, a list of pages that otherwise might share the same title.
en.wikipedia.org /wiki/Phasor   (128 words)

  
 Phasors and ATUs
The purpose of the phasor is to provide an RF voltage of the correct phase and magnitude to each antenna in an array to produce the desired radiation pattern.
The phasor is not the frightening cabinet of horrors that some engineers consider it to be.
If its operation is understood, all dial readings are logged, users remember that a change to one phasor control usually results in at least a minor change in the other towers and the reference tower phasor controls are rarely moved, the phasor can usually be tamed.
beradio.com /transmission/radio_phasors_atus/index.html   (1467 words)

  
 AC circuits, AC electricity   (Site not responding. Last check: 2007-10-22)
The animation and phasor diagram here are simple, but they will become more useful when we consider components with different phases and with frequency dependent behaviour.
The voltage phasors (brown for resistor, blue for capacitor in the convention we've been using) add according to vector or phasor addition, to give the series voltage (the red arrow).
Because the phasors for reactances are 90° out of phase with the current, the series impedance of a resistor R and a reactance X are given by Pythagoras' law:
www.phys.unsw.edu.au /~jw/AC.html   (3882 words)

  
 AC Circuits   (Site not responding. Last check: 2007-10-22)
KEY TERMS: alternating current, ac source, voltage amplitude, current amplitude, phasors, phasor diagram, phase angle, inductive reactance, capacitance reactance, root-mean-square (rms) current, power factor, resonance, resonant angular frequency, transformer.
The phasors are rotating at an angular speed of:
Phasor diagrams are easier to draw than the sinusoidal curves, and are easier to use to calcite phase angles.
www.physics.sjsu.edu /facstaff/becker/physics51/ac_circuits.htm   (272 words)

  
 Harmonic Phasors and Fourier Series   (Site not responding. Last check: 2007-10-22)
phasor is a complex exponential signal (function of time) of the form
In graphical terms, the phasor sum can be constructed by placing the vectors  “head-to-tail” in the complex plane and the real part can be viewed as a projection of the sum on the real axis.
Also you can enter a phasor  sum directly on the complex plane by simply clicking on a sequence of points to define the vector harmonic components in sequence.
www.jhu.edu /~signals/phasorapplet/phasorappletindex.htm   (291 words)

  
 Phasors and Impedances
The only difference is that all voltages and currents are now phasors and all resistances, capacitances and inductances are replaced with their complex impedances Z
Circuit analysis in the complex domain is the same as for purely resistive circuits but we must deal with phasors and impedances.
The voltage phasor is V = 100 V. The impedance is
www.ece.arizona.edu /~szilagyi/impedance.html   (752 words)

  
 Introduction to AC Circuits   (Site not responding. Last check: 2007-10-22)
The basic purpose of phasors is to show the rms value (or the magnitude in some cases) and phase angle between two or multiple quantities, such as voltage and current.
The reactance is a function of ω in L and C loads, and for an inductive load, X is positive, whereas for a capacitive load, X is negative (Fig.
Equivalent circuits of an impedance and impedance phasor in the complex plane.
www.informit.com /articles/article.asp?p=101617&seqNum=7   (1720 words)

  
 Schrödinger picture -- Facts, Info, and Encyclopedia article   (Site not responding. Last check: 2007-10-22)
Therefore a state function is a linear combination of basis vectors, each one multiplied by a complex coefficient which has a magnitude and a direction in the complex plane.
In the Schrödinger picture, these phasor coefficients are constantly rotating in a circle through time.
The propagator effects a simultaneous rotation of all the phasor coefficients of all the (infinite) basis vectors which form the state function.
www.absoluteastronomy.com /encyclopedia/s/sc/schr%f6dinger_picture.htm   (440 words)

  
 Rotating Phasors Demo   (Site not responding. Last check: 2007-10-22)
Notice that the phasor is white and it's projection on the real axis is red.
The lengths of the two red phasors are always the same.
Here are two more phasors at different frequency, but this time they differ by only a few hertz.
www.ewh.ieee.org /soc/es/Aug1996/011/cd/Demos/Phasors   (122 words)

  
 Phasors and Sinusoids   (Site not responding. Last check: 2007-10-22)
The sinusoid is said to be represented by f(t) in the Time Domain and by F in the Frequency Domain.
This figure shows a phasor, F, in the Frequency Domain and corresponding sinusoid, f(t), in the Time Domain.
Reverse the direction without changing the length of the phasor.
people.clarkson.edu /~svoboda/eta/phasors/Phasor10.html   (134 words)

  
 EGGN 484 Lecture 3   (Site not responding. Last check: 2007-10-22)
Calculate apparent, average, and reactive power in the phasor domain, and plot them in a power triangle.
A phasor is a representation of a sinusoidal voltage or current as a vector rotating about the origin of the complex plane.
We then shorten the notation, assuming that all phasors that will be used in a system are at the same frequency, the (e
egweb.mines.edu /eggn484/Lecture03.html   (278 words)

  
 Gearing Phasors - RC Groups
The key seems to be keeping the Phasor RPM's under control (not exceeding 20,000 RPM I believe).
I run my 15/4 Phasor direct drive, as part of the point, for me, is the simplicity of not having to deal with a GB.
I guess there's a couple of points of interest to me. Namely the Mega is comparable to the Phasor and both are about 2/3 the price of my guess of an equivalent Hacker once they are geared.
www.rcgroups.com /forums/showthread.php?t=42115   (1767 words)

  
 Phasors
When all field quantities are written as phasors, Maxwell's equations assume the form (1.25-1.30) and are thus indistinguishable from the equations in the frequency domain.
Basically, phasor quantities and frequency-domain quantities lead to the same analytical derivations.
Then Maxwell's equations and the continuity equations in the phasor domain are:
www.uic.edu /classes/eecs/eecs520/textbook/node5.html   (130 words)

  
 Review of Phasors   (Site not responding. Last check: 2007-10-22)
Once we start multiplying and dividing, the trig turns into a big mess, and gets in the way of our understanding of what is going on.
The way we deal with this, as every good 242 student knows, is to introduce phasors.
Note that this is the same thing as plotting the phasor on the complex plane, and then observing the projection of the phasor on the real axis, as the phasor rotates around at a rate ωt figure 3.
cnx.rice.edu /content/m1051/latest   (457 words)

  
 [No title]
function varargout = Phasors(varargin) % PHASORS M-file for Phasors.fig % PHASORS, by itself, creates a new PHASORS or raises the existing % singleton*.
% % H = PHASORS returns the handle to a new PHASORS or the handle to % the existing singleton*.
1)), warndlg('Frequency of phasor must be between 0.1 and 1.
www.swarthmore.edu /NatSci/echeeve1/Ref/phasors/phasors.m   (1050 words)

  
 NIME documentary, 'Phasors Built My Hot Rod" Fall 2003
NIME documentary, 'Phasors Built My Hot Rod" Fall 2003
There is a new version of the "Phasors Built my Hot Rod" DVD out, with a new version of the title documentary and bonus performance footage!
"Phasors Built My Hot Rod" is a documentary exploring current issues involved with designing, building and performing new musical instruments.
www.lowfrequency.org /itp/NIMEdocumentary   (279 words)

  
 [No title]   (Site not responding. Last check: 2007-10-22)
Relationship between phasors, complex exponentials, and sinusoids 5.
Phasor relationships for circuit elements (Section 8.4) 5a.
Complex exponentials provide the link between time functions and phasors.
ceaspub.eas.asu.edu /ece201/Lecture/Lecture19.ppt   (210 words)

  
 Information Bridge: DOE Scientific and Technical Information   (Site not responding. Last check: 2007-10-22)
The instantaneous power factor can be clearly understood from the instantaneous phasors.
The unique property of instantaneous phasors is that at any instant the instantaneous three-phase currents and voltages can be represented by a set of balanced phasors.
The instantaneous power factor resembles the familiar format of power factor derived from the conventional phasors.
www.osti.gov /bridge/product.biblio.jsp?osti_id=672143   (172 words)

  
 The educational encyclopedia, electronic java applications   (Site not responding. Last check: 2007-10-22)
AC circuits power the instantaneous electric power in an AC circuit, resistor, capacitor, coil, mixed
Phasor diagrams and complex numbers for AC circuits analysis enter magnitude, phase then press draw button
Phasors and sinusoids, Adding phasors, Matching phasors to sinusoids
users.telenet.be /educypedia/electronics/javabasic.htm   (395 words)

  
 The educational encyclopedia, automatization and control systems   (Site not responding. Last check: 2007-10-22)
Sense and sensitivities illustrates the utility of the sensitivity and complementary sensitivity functions for linear control system design,
Signals systems control discrete-time signals on the screen, Fourier series, continuous-time phasors, rotating vectors, discrete - time Fourier series, signal sampling at various sampling frequencies, and signal reconstruction from samples using various low-pass filter cutoff frequencies,
Temperature control simulation to design a feedback controller in order to control the temperature
users.pandora.be /educypedia/electronics/control-systems.htm   (542 words)

  
 ELECTRONIC ENGINEERING TECHNOLOGY SOFTWARE SITE<br>
PHASORS Rotating phasors become V vs. time graphs (comes Zipped)
RFC12 Smith Chart Analysis/Design, VERY good teaching/learning tool (comes Zipped)
TRANALV2 Transmission Line Analysis Program - shows phasors of V and I, with ANY load impedance
uhaweb.hartford.edu /eetsw   (301 words)

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