Main cause of AVR damage of MTU generator

The AVR circuit of the generator voltage regulator consists of three parts: the main rectifier circuit, the voltage detection circuit and the comparison control circuit. Excluding the possibility of damage caused by the quality of the original electrical components, in the whole AVR circuit, the operating frequency of the main circuit and the comparative control circuit changes the most; The rectifier bridge of the main circuit and the transistor in the comparison circuit change more frequently, and their damage ratio accounts for more than 90% of the damage rate of the whole AVR. Since the AVR on the imported generator is a non-disassembly and repair part, it is necessary to replace it if it is damaged, so we mainly analyze the reasons for the damage of AVR on the generator. It is most important to avoid the damage of AVR as far as possible. As long as it is properly used, the service life of AVR can be improved.

(1) The more stable the generator voltage is, the smaller the variable frequency in AVR is; The smaller the switching action of the transistor in the comparison circuit, the smaller the probability of AVR damage;

(2) The output load is relatively stable, the smaller the variable frequency in the AVR, the smaller the switching action of the transistor in the comparison circuit, the smaller the probability of AVR damage;

(3) The more stable the speed of diesel engine is, the less the oscillatory impact of changing current on AVR is;

(4) Frequent "traveling" and excessive load, three-phase load difference is the most important cause of AVR damage;

(5) Select the generator set with E, F and C fuel systems, because the frequency change is small, the use of AVR will be more reliable.

Jiangsu Meao Power Technology Co., Ltd. focuses on the development and manufacture of diesel generator sets, and has accumulated rich experience in manufacturing and service in this field. As a professional generator manufacturer, MEAOPOWER attaches great importance to product development, innovation and service quality, and maintains close strategic cooperation with famous domestic and international enterprises such as Cummins, Perkins, Doosan, Yuchai, Weichai, Shangchai, Wuxi Wandi, Lillesomer, Stanford, Marathon and so on.