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AVR of the main causes of damage and damage after the emergency measures
Update:2017-02-09 Tags:the

A, the main reasongenerator for the damage of AVR analysis:

AVR by the main loop of the rectifier circuit, voltage detection circuit, compare the control circuit of three parts; Rule out the original electrical components itself quality reasons in terms of the possibility of damage, in the whole piece of AVR circuit, control circuit of main circuit and compare work frequency change; The rectifier bridge and comparison of main loop circuit more frequency transistors in changes, the damage rate accounts for more than 90% of the whole piece of AVR damage rate; Given on imported generator AVR belongs to the repairing and accessories, should change new damaged, so, we analysis the main causes of the generator on the AVR damage, as far as possible to avoid the damage of the AVR is one of the most important, as long as using appropriate, can improve the service life of AVR.

(1) the greater the stability of the generator voltage, frequency, the smaller the change of inside AVR; Comparison circuit of the transistor switch action, the smaller the AVR damage probability is smaller;

(2) the output load relatively stable, AVR inside the smaller changes in frequency, the smaller the comparison circuit of the transistor switch action, AVR damage probability is smaller;

(3) the more stable the rotational speed of diesel engine, the smaller the change current on the oscillation of the AVR;

(4) the frequent traveling block and super load, three-phase load is a huge difference between the main cause of the damage of AVR.

(5) choosing with E, F, C the fuel system of generating set, due to the frequency variation is small, the use of AVR is more reliable.

Second, AVR damage after emergency measures:

AVR although belong to wearing parts, but the abnormal damage due to various reasons, under the condition of the engine and generator parts good, because the AVR damage cannot be quick to electricity generation, we can use temporary emergency measures, solve the urgent need of electricity.

(1) cancel the AVR plate, using only F1, F2 for transient excitation input;

(2) with the aid of generator battery, adding an excitation switch and 5 w, 5 k the rheostat, the running state, let the switch is closed, the engine open the switch after reaching the rated speed, voltage, adjust the rheostat the voltage setting around 420 v; If the generator voltage regulator the whole machine control panel, through change wiring for stable voltage.

(3) not all situations can adopt the method of the power supply, objective existence must meet the following conditions can meet the use requirements: A, the load & le; 70%; B, load & le; 20%;

(4) this method should be wary of the charger to charge whether performance is good, if the charger can't charge, plus a more than 20 a 24 v transformer, and after the whole battery used in parallel, otherwise the battery soon run out of electricity.

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