The generator speed and frequency are proportional generators that can adjust the engine speed.
One of the essential parameters that determines a generator’s rating is its output frequency. To fit the output of a regular electrical grid or the frequency rating of your appliances, the generator’s electrical output must be maintained at a fixed frequency, 50 Hz or 60 Hz.
In the Singapore, the frequency is typically 50 Hz, while in USA, it is 60 Hz. It’s also possible to come across isolated parts of the same grid that operate at different frequencies. It then becomes essential to vary the output frequency of the generator to match that of the appliances to be powered or of the grid to which your generator is connected.
To generate electricity, modern generators use an engine that is directly connected to an alternator. Changing the engine’s rotation speed is one of the most common ways to adjust a generator’s output frequency.
The two variables are linked using the following formula: Number of magnetic poles (P) / 120 = Generator Frequency (f) = Number of engine revolutions per minute (N) * Number of magnetic poles (P) P = 120*f/N, on the other hand,
A 2-pole generator with a 60 Hz output frequency has an engine speed of 3,600 rpm, according to the formula above. The engine speed must be reduced to 3,000 rpm to adjust the output frequency to 50 Hz for the same generator configuration. Similarly, a 4-pole generator with a 1,800 rpm engine generates 60 Hz output. A 50 Hz output is obtained by reducing the engine speed to 1,500 rpm.You can change the engine rpm settings on small or residential generators by making a few adjustments to the control panel. To change the frequency of your generator from 60 Hz to 50 Hz, follow the steps below:
1.Start your generator and adjust your control panel’s frequency meter to 50 Hz.
2.Check the voltage output of the generator with an AC voltmeter or a potentiometer, as the case may be. As the frequency is reduced, the output voltage decreases and can fall below the desired value.
3.Adjust your control panel’s AC voltmeter or potentiometer until you get the perfect output voltage at 50 Hz. You will achieve the same results by making similar changes to the control panel.
4.You can raise the frequency from 50 Hz to 60 Hz by making similar changes to the control panel.
5.If the frequency is not shown on the control panel, you must first attach a computer to calculate the frequency while the generator is running, and then adjust the engine rpm.
6.Generator controller units track and power your generator in real time. In the event of excessive engine rpm or a very low output frequency, built-in safety functions automatically shut down your generator.