How is The Engine Speed Related to The Frequency of AC Generator?

First, check if your engine speed is normal? Can you hear the engine speed decrease?

If you think the frequency is changing but the engine speed is decreasing, or if you think the engine speed is constant, please continue reading. You will be able to hear what the diesel engine speed is doing, so please check and determine what is happening in your situation.

The base frequency is always proportional to the speed of the engine. If you find that the frequency is very low while the engine speed remains constant, the effect is caused by harmonic distortion. Harmonic current is caused by nonlinear loads connected to the distribution system. When the current drawn by the current does not have the same waveform as the power supply voltage, it is said that the load is nonlinear. Through the flow of system impedance, harmonic currents generate voltage harmonics, causing distortion of the power supply voltage.

You may want to know how the engine speed is related to the frequency of the AC generator? Why did it happen? It didn't happen on the power supply!

Compared to the largest generator, the power supply is a behemoth - you don't have the same protection on the power supply as on the generator. Harmonic distortion can be offset, but there are three main methods:

Compared to the largest generator, the power supply is a behemoth - your protective measures on the power supply are the same as those on the generator. Harmonic distortion can be refuted, but there are three key methods:

You should note that harmonics cause additional current to flow through the windings of the AC generator, resulting in additional heating. Therefore, if possible, you should primarily deal with harmonics to reduce them to an acceptable level. If there are a large number of harmonics in your system, a super large size is required to ensure that you operate within the limits.

1) Over sized generators

Ultra large generators (especially AC generators, not engines) will reduce harmonics as a percentage compared to the overall power generated by AC generators, The NTAGE is relatively small.

2) Add some more resistive loads

The resistive load acts as a "break" in harmonics, addressing the effects of the system in the system and thus adding additional static loads can address the harmonic issues in the generator system (assuming you have sufficient capacity to add these loads).

3) From the perspective of speed monitoring, if you have another way to monitor engine speed, it is not frequency

Since the speed is always proportional to the base frequency, if the engine speed does not decrease, your base frequency will not be very low. Most standard designed generators do not use CANBUS to calculate the speed frequency of the AC generator based on the speed calculated between the engine and the engine. In this case, adding a magnetic pickup to the system will allow monitoring of engine speed.

Dingbo Power was founded in 1974 and is one of the earliest manufacturers of generators and diesel generator sets in China. If you want get more information, please feel free to send email to sales@dieselgeneratortech.com we will pay highly attention on your question.