0
What are the factors causing a permanent magnet generator not to generate emf?
Wiki User
∙ 13y ago
A magnetic field will not generate an EMF if there is no motion, so the primary factor causing a permanent magnet generator to not generate EMF is if it is not turning.
Wiki User
∙ 13y ago
Add your answer:
Earn +20 pts
Which factors affect performance of magneto?
A magneto is an electric generator that is powered by magnets. Some factors that will affect its performance include their power source as well as the reliability.
What is the RPM for ac generator to get 240 volt?
'Speed' is only one of the factors that determine the output voltage of an a.c. generator, so your question cannot be answered. In practise, speed is more important establishing frequency rather than voltage.
How do you synchronizing panel works?
Paralleling generatorsThe following is for three phase manual paralleling of two generators. Today's control systems will sense and do this operation automatically but the general process is the same. There are a couple of factors that have to be met when paralleling generators. The process of paralleling generators is called synchronization. What this means is that both generators have to be in phase with each other and running at the same speed. The generator that is running is called the lead generator and the one that you are trying to parallel is called the lag generator. There are two types of instrumentation used in synchronising, one is a light bank and the other a bit more sophisticated is a synchroscope meter. The synchroscope indicates whether the lag generator is faster, slower or in phase with the bus. The lag generator is brought up to speed just under the RPM of the lead generator. The synchroscope will be revolving very slowly in a clockwise rotation at this point. When the hand on the synchroscope reaches the 11 o'clock position the switch is thrown to bring the generator on to the bus tying the two generators together.
Which is better for generator testing resistive or inductive loads?
resistive loads are best for testing ..they dont introduce phase changes you may test ac devices almost the same as dc inductive loads bring in lots of other factors that give confusing results
What to consider before synchronising two generators?
You adjust the voltage and RPM on the second generator to be slightly higher than the first. How much higher depends on the system and generator design.While monitoring a synchrometer, you pick a relative phase position (again, depending on design) and close the second generator to the first at the selected moment in phase/time.You immediately monitor and adjust power and vars to make sure the second generator is not too over or under loaded.Paralleling generatorsThe following is for three phase manual paralleling of two generators. Today's control systems will sense and do this operation automatically but the general process is the same. There are a couple of factors that have to be met when paralleling generators. The process of paralleling generators is called synchronization. What this means is that both generators have to be in phase with each other and running at the same speed. The generator that is running is called the lead generator and the one that you are trying to parallel is called the lag generator. There are two types of instrumentation used in synchronising, one is a light bank and the other a bit more sophisticated is a synchroscope meter. The synchroscope indicates whether the lag generator is faster, slower or in phase with the bus. The lag generator is brought up to speed just under the RPM of the lead generator. The synchroscope will be revolving very slowly in a clockwise rotation at this point. When the hand on the synchroscope reaches the 11 o'clock position the switch is thrown to bring the generator on to the bus tying the two generators together.The light system of paralleling generators has lamps hooked in series and connected between the hot lead of the lead generator and the hot lead of the lag generator. When one generator is running faster than the other one, the lights will blink off and on as the generators come in and out of phase with each other. Adjusting the throttle of the lag generator and bringing it closer to synchronise speed will cause the lights will start to pulsate slower and slower until they go off for a period of seconds and then on for a period of seconds. At this point the two generators are electrically paralleled. Count the time between on off on of the lights. At half the off time (zero voltage) throw the switch and the generators will lock together, the two generators will be running in parallel with each other. Manually to keep them paralleled requires a bit of work, as the faster generator will try and take the load and motor the other one. This is where a governor is a great asset. If the generators are tied together out of phase two things could happen. The least problematic would be the generators breaker will trip. The second and most dangerous is if the lag generator is just a little bit out of phase when the switch is thrown, then the generator will be jerked into phase lock as momentary heavy current flows between the two generators. The sudden loading of the generator has been known to break crankshafts of the engine driving it.
What are Factors that causes a permanent magnet generator not to generate emf?
Either the break in the circuit or loss magnetic strength of the magnet - can result into no generation
What factors that cause permanent magnet not to generate?
Break in the circuit or loss of magnetic strength of the magnet can result in to no generation
What are the factors that determine the size and direction of the emf generated by the permanent magnet generator.?
number of conductors speed magnitude of the magnetic flux
What are the aggregate factors causing flood?
what are the aggregate factors causing flood?
How much electricity is produced by 350 RPM?
That's a much more complicated question than you would first think. A generator that operates at 350 RPM would be very rare. To better answer the question, a short overview of how generators work is needed. To generate electricity, wires are moved through a magnetic field. The stronger the magnetic field, or the faster the wires are moved, the tougher it would be to move those wires, and the more electricity is generated. A typical generator (especially what you would find in a power plant), uses electromagnets to generate the magnetic field. Due to many different engineering concerns, the speed of the turbine remains constant (3600 RPM is a common speed, though lower speeds are not uncommon). If more electricity is needed, the electromagnet's power is increased, which generates a stronger magnetic field. Then, it is up to whatever is turning the generator (usually some sort of a turbine) to provide more power to the generator to keep the RPM the same. There will be some sort of a limit on the generator, where applying more power could overload the electromagnets, or damage the generator shaft. The important thing to notice is that whether that generator is providing 2 megawatts or 55 megawatts, it is turning exactly the same RPM. So, this whole answer boils down to this: it varies. It will depend on the generator, on what's turning the generator, and what load is on the generator. Those three factors often have to be balanced against each other. If the generator has permanent magnets, then you can predict how much electricity it will generate at 350 RPM. That will depend on the strength of the magnets, and how many coils of wire are used. However, if the load on the generator doesn't match generation, the RPMs at the generator will increase.
How many hours will a propane generator run after the power goes out?
The factors that determine how long a propane generator can run are the size of the propane tank, the size of the generator, the brand of generator, and what is being used under the generator's power.
What are the factor affecting voltage build up of dc generator?
List the factors that affect the voltage building in D.C generator.
What are the 3 factors that are causing a collision between your civilization and the earth?
There are three factors that are causing this collision.Population, scientific and technological revolution.
What are the factors causing earthquake?
f.u.e.l
What are the most important factors causing land pollution?
factors causing land polluton are oilspills dumping of garbage greenhouse gases
What factors are causing Dolphins to be endangered?
im not sure
What is an all power generator?
Allpower Generator are a specific company that manufacture a variety of generators, including diesel and gas powered engines. There are many factors to consider when buying a generator, for example, how long you might need the generator to be used (a few hours or several days), the voltage (depending on the country you live in), how much you will want to poser from the generator. I have included several links below that provide advice on which factors to consider when purchasing a generator. http://www.justgenerators.co.uk/pages/FAQ.htm http://www.essortment.com/advice-reviews-choosing-new-home-electricity-generator-25393.html http://www.diybanter.com/home-repair/197355-home-standby-generator-advice.html
