Q:Can u plz help me to solve following problems:1.After an AC generator has been paralleled explain how the following are achieved for the incoming generator(i)Correct kW load sharing(ii)Correct load current when the generator has a different power factor to the other generators2. the cumulative damage that may be caused when the alternators are incorrectly synchronized3.For alternators operating in parallel the consequences of:(i)reduced torque from the prime mover of one machine(ii)reduced excitation on one machine

1. (i). Each engine should carry the SAME LOAD PERCENTAGE-wise, eg. 80%, to minimize the load change burden on the rest. (Smaller engines may run at full load, since their contribution may go unnoticed.) Since the overall kW bus load is constant, each generator will pickup a percentage of it, by controlling the torque on each prime mover. If it is a steam turbine, by throttling steam flow. If it is a diesel engine, by throttling fuel, and so. (ii). Each alternator should be adjusted to carry the SAME POWER FACTOR, by adjusting excitation accordingly, eg, .85, to avoid stability issues. Running alternators at leading power factors may turn the system unstable and force loss of synchronism 2. Considerable mechanical damage will be caused by incorrect synchronization to windings, shaft and keyways. 3. (i) reducing torque on one a prime mover is done when preparing to take it out of service. This has to be done gradually, so that other machines can pickup the load slowly. When close to unloaded, the generator can be taken off the grid. Power should never be reduced to the point of allowing the generator to be motored, i.e., reverse power flow, which can cause unpredictable damage to the turbine and system instability. (ii) reduced excitation is a very dangerous condition which will cause the power factor to turn leading, i.e., capacitive, weakening the synchronizing torque with possible loss of synchronism and forcing the bus voltage up. .

Q:I want to build an electric generator from an electric motor, how do I do this?I need planes on how to build a generator from an electric motor. I am wanted to use a 16 HP Power Diesel tractor motor. Can any one help? I am useing Diesel power because diesel fuel last longer than gas when in storage. Is this correct?I want a AC Generator.

Very simple. You need an electric motor of the same wattage as you need to generate. You will need to spin the motor a little faster than the rated RPM of the motor. (pick your pulleys carefully) Hook a small load up to the motor, spin it, hit it with a jolt of voltage. (try your 12 volt battery)It should start to generate and you can hook up a bigger load to it. Too simple? Try it.

Q:I planned that the factory be fully mechanised. Public power supply is very poor. I wanted to purchase diesel generators but i have been advised by a friend that solar generators are more cost effective. Is solar a good source of energy to power such a factory?

Yes, it can be fully solar. Very power comsuming factories are autonomous. If you dont find how to, if you want e-mail me and i will put you in touch with some companies. For your info, some companies not only are autonomous, they resell power while they dont use it.

Q:What are the materials used in diesel generators

In order to make the cylinder strength wear resistance, heat resistance and high cylinder, the general use of cast iron, alloy cast iron, cast iron or high phosphorus boron cast iron, a high speed and high load diesel engine using alloy steel cylinder.

Q:if the answer is a regular car, how can hybrids possibly be more efficient than a regular car, since some of the power from the gas engine goes to the generator for the electric motor.

Generator okorder

Q:I live on an island and we only have one power company they have taken our power away from us and because we were stealing power from them and would have to pay a hefty fee which we decided not to pay. we are running on a diesel generator right now but i was wondering if natural gas or propane generators are cheaper and or more efficient. ive checked the gas suppliers website for prices but it wasnt very helpfull.I would need a generator that is about 15 kW

If you have a natural gas pipeline then that's what I would use. Nat gas burns the cleanest, no soot, no mess, no fuel filters to clean, the motor oil lasts longer, no tanks to get water and gunk in. no fuel stabilizers needed, no fuel spills and no tank certifications, etc. With a pipeline you won't have to go shag and store fuel and you won't run out. Even in a wide spread power failure the nat gas is usually not affected. If you have to lease or rent a nat gas tank THEY have to certify it against leaks.

Q:How many gallons of diesel would br required to run this generator for 24 hours??

Consumption of fuel is actually dependent on the model used so it can vary, your best resource is to get the figures from a manufacturer, take for example the Generac II Emergency Power Systems provide a Diesel Model EPS-8D see link below for full specs: So if we based on this model which consumes 0.88 gallons per hour, running for 24 hours would eat up 21.12 gallons of diesel per generator. As to the amount of current you wish to get that would depend on other set up and implements that you hook to the generator. You may need more than 1 generator to get the total amperage that you are looking for. See the equipment specs.

Q:I have to wonder. WHY don't we have a car right now in 2010 that gets 100+ mpg?Ok we have the Honda Insight and Toyota Prius that get 50MPG+ WELL why not DOUBLE or TRIPLE or QUADRUPLE the Batteries and get 100MPG??? Seriously WHY NOT PACK Enough Lithium Ion batteries in there to get 300MPG?? You mean to tell me that with all the technology we have today in 2010 that we can't come up with a Hybrid that gets 100MPG??? PURE NonsenseSomeone somewhere is keeping the 100MPG car from being produced. Simple as that. You mean to tell me that you can't pack enough Lithium Ion batteries into a CAR to get 100MPG??? Yea right. You know it could be done. BIG OIL and other political forces DON'T WANT the 100MPG car. Why did gas prices go to $4.50 per gallon??? TO get the $$$ While the Getting was good. Now the gig is up and they know it.

Lithium ion batteries are a good source of energy storage, but they have some very serious drawbacks: If they are shorted they can go into melt-down and start a fire, and that's the small ones the size of a quarter. Think what could happen after a car wreck - You could start a block leveling fire. There will have to be a better battery design before the electric car becomes viable.

Q:How does a throttle actuator/control for a generator know to increase decrease throttle based on electrical current demand?I’m thinking of building a DC generator using a diesel engine and a PMAC motor but am confused as to how I will vary the engine speed automatically to meet the varying current demand. Thanks!

eir if you sense the current load by a line resistance of perhaps 0.1 ohm, you can increase or decrease the RPM of the generator as the current rises and falls

Q:How many Panels would I need to make sure that I cover my 1600 kwH? I actually want to try and generate about 3000 so I can sell back to the grid.

1600 kwH would be about 50 kwh per day (1600/32) so if the sun shined very nicely you would need about 150 kw capacity for an 8 hours of sun day or 200 kw for a 6 hour day. (24 hours in day / 6 of sun * 50 kwh per day) Your supply source or the weather bureau should be able to supply the number of sun hours at various times of the year and the capacity of various panels.