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Let a rotating machine have following:

Frequency (f); Speed of Motor (N); No. of Poles (P)

N= (120*f)/P

From above

Speed N is

directly proportional to frequency f

indirectly proportional to number no. poles P

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How do you control rpm of single phase motor without using variable frequency drive?

By changing the voltage through a potentiometer ( eg fan regulator )


When you rotate the handle of the electric generator faster does it deliver more less or the same voltage?

The speed of a generator only effects the frequency. Most generators operate at 1800 RPM. The output voltage is controlled by varying the field excitation voltage.


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.


Does load affects fuel consumption per hour of a diesel generator?

If the generator is to maintain the same rpm and power output, then a heavier load will increase the diesel consumption. The revolutions per minute the generator runs will increase as the load increases, thereby resulting in an increase in diesel consumption to maintain the high rpm. A Generator has a governor which attempts to maintain frequency at 60 Hz for North America. For the generator to increase the power output at the same frequency, the governor will increase the fuel and air to the engine. The fuel consumption will not be linear because of the curves associated with the particular engine. The fuel to KWH is know as the heat rate curve for the generator.


What method can be used to increase the rate of delivery of a rotary gear type pump?

increase the rpm

Related Questions

How do you control rpm of single phase motor without using variable frequency drive?

By changing the voltage through a potentiometer ( eg fan regulator )


How to control motor rpm?

For AC motor, you can change motor RPM by changing its supply voltage or by changing supply frequency. For DC motor, you can change motor speed by controlling armatyre voltage or field current.


Why do your lights dim when your RPM decreases?

Because the voltage drops. Depending on what is the problem changing the battery or alternator will help.


Relate the frequency of the generated voltage to the speed of the machine and the number of poles?

N=120f/P where N - number of rotations in rpm f - frequency in Hz and P - number of poles


What is the fuel injector solenoid energized by?

Fuel injector is energize by signal composed of pulsed voltage frequency increases as with rpm set by pcm


When you rotate the handle of the electric generator faster does it deliver more less or the same voltage?

The speed of a generator only effects the frequency. Most generators operate at 1800 RPM. The output voltage is controlled by varying the field excitation voltage.


How frequency is controlled in a grid?

The frequency is determined by the operational speed of the generators in the power plant and is very closely related to the RPM of the generators (it might only differ in a constant multiplier).Depending on the load of the grid a proper torque must be applied on the generators to generate voltage with the proper frequency. Once the AC is out in the grid its frequency is much less prone to environmental effects than its voltage.


How gearing down works?

Gearing down works by changing the gear ratio on the transmission, transfer case, or differential. It increases the RPM of the input while reducing the output RPM to increase power.


Why are ac generators loaded after reaching full speed?

If the load was connected as the speed was increasing it would not be operating on its proper frequency. Also as the RPM is increasing so is the output voltage.


Is it feasible to parallel the dissimilar rating generators?

yes,but the two dismaler generators should have the following similarity; 1]same voltage rating 2]same frequency 3]same rpm.


What you need to change in the generator to convert from 50 Hz to 60Hz?

The frequency is based on the RPM (speed) of the generator. If you over ride the governor on bigger generator or move the speed control upwards on smaller units you will be able to reach 60 Hz. Keep in mind though the voltage will increase also.


Relation between voltage and RPM?

voltage depend on current and resistance r.p.m depend on no of pole