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an alternator is essentially a generator that converts the kinetic energy from the combustion engine in your car into electrical energy to recharge your battery. To answer your question about connecting a generator to another generator to create limitless energy there is always a loss of energy during the conversion process usually due to friction. In theory it is possible but there is no pure conversion of one form of energy to another in real world application. There will always be a loss of energy in some form.

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How do you work out va for a transformer?

To calculate the volt-amperes (VA) for a transformer, you multiply the primary voltage (V) by the primary current (A) or the secondary voltage (V) by the secondary current (A), depending on which side of the transformer you are analyzing. This gives you the apparent power in volt-amperes (VA). Typically, the formula is VA = V × I, where V is the voltage and I is the current for either the primary or secondary side, ensuring that you account for the correct phase angle if applicable.


How do you work out the secondary voltage in a transformer?

The voltage ratio is the same as the turns ratio for an ideal transformer, and most transformers are close to being ideal. So use the following equation:Vs/Vp = Ns/Np


How should I calculate this. A single phase transformer is rated at 99kVA The primary voltage is 6.6kV and the secondary voltage is 220V Assume no losses and calculate The full load primary current?

First find the ratio of the transformer. 6600/220 volts. Second find the secondary current, I = W/E, 99000/220. Third divide the secondary current by the transformer ratio. The answer will be the primary current. To check your answer (W (or VA) = V x A) multiply the primary current times the primary voltage and the secondary current times the secondary voltage and they should both equal the transformer's kVA.


Why is the transformer rated in KVA?

Because a transformer is only in use when it is under load. An actual power factor requires a load and it is neccessary if you are going to calculate for kilowatt.The Power equation isP = V I cos #Where cos # is power factorso its depend on load butVA or Volt-Amperes is the unit that is used to rate how much apparent power the transformer can produce before saturating. transformers can all come in different shapes and sizes and all vary from VA rating. a 1KVA transformer is the equivalent of a 1000VA transformer(very big). the 'K' in front of any unit means 1000 i.e 1k resistor is the same as a 1000Ω resistor.You might think it should be rated in kilowatts instead. KVA sound like they are algebraically identical to kilowatts.Not all electrical loads will have voltage multiplied by current, equal the power consumed by the load. That is only the case for simple resistive loads.Some electrical loads have the ability to store energy over the cycle, and cause the current and voltage to be "delayed" from one another. The total power, is therefore less than the product of the voltage and current that are supplied to the load.A transformer must be sized, so that each of its windings can handle a given operating voltage, and a maximum current, and still supply the intended loads. Due to a loads delaying of current and voltage, the current might be much greater than the value of real power divided by voltage. We need to size wire windings according to what the current will be. I.e. the kVA rating divided by voltage.A perfect transformer would have the same operating kVA on both sides of it, just with voltage traded for current differing between the windings.


What is the role of magnetizing current in transformer?

connect 3 - phase supply to transformer primary winding.....keep transformer secondary winding open..... apply 3-phase voltage i.e.400v ac, and measure the amount of current flowing in each phase of the transformer primary winding...this current is the transformer magnetising current..... we can keep multimeters in series with the source....so we can measure directly the current readings.....(keep multimeters in current mode, and generally magnetising current will come in terms of milli amps for 400 v )

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