The gas generator will inevitably have this or that kind of fault in continuous use. The generator technician will repair the unit and remove the fault before putting it into operation again. For example, when using the gas generator unit, when the unit starts to the rated speed, sometimes the charging current of the generator is too small. For the gas generator technician, This kind of fault is a small problem. It's a piece of cake to solve, but it's more complicated for ordinary operators. So what's the solution? The generator charging current is too small. This fault is generally caused by the disconnection of individual silicon diode leads or poor contact between the brush and the slip ring. The specific reasons are as follows:

1、皮帶打滑。

1. The belt is slipping.

2、調節器電壓偏低。電壓調節器的功能：電壓調節器通過對發電機交流勵磁機勵磁電流的控制，實現對輸出電壓的自動調節。發電機電壓調節器可滿足普通60/50Hz及中頻400Hz單機或并列運行的發電機使用。通過控制勵磁分流電流的大小，從而改變勵磁電流，達到調節發電機電壓的目的。

2. The regulator voltage is low. Function of voltage regulator: the voltage regulator can automatically adjust the output voltage by controlling the excitation current of generator AC exciter. The generator voltage regulator can meet the requirements of ordinary generators with 60 / 50 Hz and 400 Hz intermediate frequency. By controlling the shunt current of excitation, the excitation current can be changed and the generator voltage can be regulated.

3、瓦斯發電機磁場線搭鐵或磁場線圈局部搭鐵短路等。磁場線搭鐵或磁場線圈局部搭鐵短路，則導致發電機不勵磁，就不發電或電流過小。用萬用表測量發電機磁專場接線柱和接地接線柱之間的電阻止值就可知道，若測得的電阻值與規定的電阻值很接近，說明是正常的，如果電阻測不出來，萬用表沒有指示，則說明勵磁回路不通。

3. The magnetic field wire of gas generator is grounded or the magnetic field coil is locally grounded and short circuited. If the magnetic field line is grounded or the magnetic field coil is locally grounded, the generator will not generate electricity or the current will be too small if it is not excited. Use a multimeter to measure the resistance stop value between the generator magnetic field terminal and the grounding terminal. If the measured resistance value is very close to the specified resistance value, it means that it is normal. If the resistance can not be measured and the multimeter does not indicate, it means that the excitation circuit is blocked.

4、發電機硅二極管引線脫焊斷開，使電樞線圈一相或二相斷路。

4. The silicon diode lead of generator is desoldered and disconnected, which makes one or two phases of armature coil open circuit.

5、電刷與滑環接觸不好(滑環上有臟物，碳刷磨損太大，彈簧壓力不足等)，接觸電阻較大，使激磁電流變小。

5. The contact between the brush and the slip ring is not good (there is dirt on the slip ring, the carbon brush is worn too much, the spring pressure is insufficient, etc.), and the contact resistance is large, which makes the excitation current smaller.

發電機充電電流過小的解決方法：

The solution of generator charging current is too small:

1、對瓦斯發電機電刷與滑環接觸情況進行檢查，查看是否發現異常；

1. Check the contact between brush and slip ring of gas generator to see if any abnormality is found;

2、用萬用表直流電壓擋測量調節器輸出電壓，查看輸出電壓是否高或低于正常范圍；

2. Use a multimeter to measure the output voltage of the regulator, and check whether the output voltage is high or lower than the normal range;

3、用萬用表直流電壓擋測量發電機輸出電壓，發現輸出電壓為5V(測量時要斷開調節器與蓄電池的接線)，這證明故障在充電發電機上。

3. The output voltage of the generator is measured with the DC voltage gear of the multimeter. It is found that the output voltage is 5V (the wiring between the regulator and the battery should be disconnected during the measurement), which proves that the fault is in the charging generator.

4、在測量二極管時，發現有4個二極管燒壞。更換二極管，對瓦斯發電機進行裝配，然后起動發電機至1300r/min時，儀表盤上的充電電流表顯示為15A，說明發電機充電正常。

4. When measuring the diodes, four diodes were found to be burnt out. When the diode is replaced, the gas generator is assembled, and then the generator is started to 1300r / min, the charging ammeter on the instrument panel shows 15a, indicating that the generator charging is normal.