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In a generator there should be residual magnetism to start the voltage production . However maintaining the voltage level is a little more complicated because of drift when loads are applied to the unit. to overcome some of the problems an exciter coil section produces a voltage at a know level. that level used as a reference to increase or lower the output of the main generator. Onan YD units have an output of approximately 24volts if the voltage lags the current by 10% it raises the exciter voltage to offset the lagging voltage. Most generators has an AVR (automatic voltage regulator) that will more closely hold frequency (a function of rpm) voltage and current at an even load. without some excitation the generation process would wonder up and down seeking a midpoint but fluctuating wildly with every output request.
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What rhymes with ovation?
Nation, automation, celebration, excitation, deliberation, excitation, penetrationcelebration, excitation, deliberation, excitation, penetration
What is meant by a second generation star?
a second generation star is a star that has died a from that become a new star
What is meant by pole slipping?
A pole slip occurs when a motor or generator cannot maintain synchronicity. This occurs because the field excitation is too low.
What are the Applications of excitation transfer theory?
Excitation theory is a misattribution of arousal.
Excitation-transfer theory by zillmann?
Zillman's Excitation Transfer Effect http://doctordigger.blogspot.com/2005/07/zillmans-excitation-transfer-effect.html
What is the difference between generator over excitation versus under excitation when attached to the grid?
Over Excitation is a condition when the Excitation System is providing too much field current and as a result, the rotor of the generator will over heat. The Excitation System is equipped with an Over Excitation Limiter. This limiter acts to reduce the Excitation Current if this condition exists Underexcitation is a condition when the generator is not getting enough Excitation Current. If the generator does not get enough Excitation Current, it can be un-synchronized with the grid. We call this slipping a pole. If this occurs, the generator can be severely damaged. Kelly Thompson Engineering Lead Siemens Energy Alpharetta GA
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Heart excitation originates in the sino-atrial node.
Which excitation synchronous motor drawn reactive power?
Hi, Under excitation - inductive reactive power Over excitation - Capacitive reactive power.
What is meant by forth generation system?
http://en.wikipedia.org/wiki/4G
What causes Parametric Excitation in Frequency Resonators?
Google: "Parametric Excitation in Frequency Resonators".
An atom that undergoes excitation and de-excitation emits?
A quanta of light (one photon).
How atomic excitation lead to concept of laser?
How atomic excitation lead to concept of laser?
