What Cause AVR of Generator Set Broken

Automatic voltage regulator(AVR) is a sealed electric device, which adjusts the rectifier output power of exciter armature by controlling low power exciter magnetic field, to control the magnetic field current of the main engine and stabilize the output voltage of the brushless generator, having protection device with low frequency and no input signal. In addition, parallel compensation function is provided to meet the customer's demand for expanded capacity. Therefore, it is very important to maintain the voltage regulator (AVR).

So, what cause AVR of generator set broken? Today Starlight Power generator manufacturer answers for you.

1. AVR circuit is composed of rectifier main circuit, voltage detection circuit and comparison control circuit. Excluding the possibility of damage caused by the quality of the original electrical components, in the whole AVR circuit, the working frequency of the main circuit and the comparison control circuit changes most frequently; the rectifier bridge of the main circuit and the transistor in the comparison circuit change more frequently, The damage ratio of AVR is more than 90%.

2. In view of the fact that the AVR on the imported generator belongs to non disassembly and repair parts, if it is damaged, it needs to be replaced. Therefore, we mainly analyze the causes of AVR damage on diesel generator. It is most important to avoid AVR damage as far as possible. As long as it is used properly, the service life of AVR can be improved. The more stable the generator voltage is, the smaller the variation frequency in AVR is; the smaller the switching action of transistor in comparison circuit is, The lower the probability of AVR damage.

3. The output load is relatively stable. The smaller the variable frequency in AVR is, the smaller the switching action of transistors in the comparison circuit is, the smaller the probability of AVR damage is; the more stable the speed of diesel engine is, the smaller the oscillation impact of changing current on AVR; frequent "traveling block" and overload, and the large difference of three-phase load are the main reasons for AVR damage; the generator set with E, F, C fuel system is selected, The use of AVR will be more reliable due to the small frequency variation.

We are a manufacturer of diesel generator set in China, if you have plan to purchase diesel generators, welcome to contact us by email sales@dieselgeneratortech.com. We will guide you to choose the most suitable genset with good quality and competitive price.