There are many reasons why the generator can't produce voltage, and many reasons need to be analyzed in different excitation systems. Taking the self-excited generator as an example, several basic reasons why the generator can not produce voltage are analyzed.

　　建压物理过程的速度发电机原动机到额定转速,转子磁场绕组L剩磁切割定子绕组,定子绕组电动势的一个小残余磁性,有一个非常低的剩磁电压发生器出口端,输入在调节系统中,一个小残余磁性当前u整流器后,加入磁场绕组,转子磁场增强,定子电动势,励磁电流增加,所以循环，通过提高发电机的额定电压。

　　The speed of the physical process of voltage build-up is from the prime mover of generator to the rated speed. The residual magnetism of rotor field winding L cuts the stator winding. There is a small residual magnetism of stator winding electromotive force. There is a very low residual magnetism voltage generator outlet end, which is input into the regulation system. After a small residual magnetism current U rectifier is added, the field winding is added, the rotor field is enhanced, the stator electromotive force and the excitation current are increased, So cycle by increasing the rated voltage of the generator.

　　1. 交流发电机电压构成的必要条件

　　1. Necessary conditions for voltage composition of alternator

　　(1)转子励磁绕组必须有剩磁，剩磁必须足够强，否则定子绕组不能产生足够的剩磁或电压过低，剩磁电流近似为0。

　　(1) The excitation winding of the rotor must have remanence, and the remanence must be strong enough, otherwise the stator winding cannot produce enough remanence or the voltage is too low, and the remanence current is approximately 0.

　　(2)转速应足够高(接近额定转速)，使剩余磁场能高速切断定子绕组，感应剩余电动势足够大。

　　(2) The speed shall be high enough (close to the rated speed) so that the residual magnetic field can cut off the stator winding at high speed and the induced residual electromotive force is large enough.

　　(3)极性要正确，即通过各器件的剩余电压转换成励磁电流所产生的磁场要加强剩余磁场，否则会相互抵消。

　　(3) The polarity shall be correct, that is to say, the magnetic field generated by converting the residual voltage of each device into the excitation current shall be strengthened, otherwise it will cancel each other.

　　2. 发电机不能建成的原因及处理方法

　　2. Reasons for the failure of the generator to be built and Solutions

　　(1)剩磁方向与激发电流方向相反，即极性相反。你可以把励磁线圈的两端调换一下，试一试就能找到。

　　(1) The remanence direction is opposite to the excitation current direction, i.e. the polarity is opposite. You can change the two ends of the excitation coil and try to find out.

　　(2)剩磁丧失或剩磁过弱。工作或长期未使用的发电机应注意检查残余磁性,检查的方法是测量发电机端电压速度接近额定转速时,如果它能达到IOV,这意味着残余磁性是正常的,否则,6 ~ 12 v直流可以直接连接到正负两极的励磁绕组。

　　(2) Loss of or over weakening of remanence. For the first working or long-term unused generator, pay attention to check the residual magnetism. When the voltage speed at the generator end is close to the rated speed, if it can reach IOV, it means that the residual magnetism is normal. Otherwise, 6-12V DC can be directly connected to the excitation winding at the positive and negative poles.

　　(3)速度过低，此时只能根据原动机的转速表或具体测量。

　　(3) The speed is too low. At this time, it can only be measured according to the tachometer or specific measurement of the prime mover.

　　(4)有时发电机的电压是正常的，但因为电压表没有指示，很容易造成错觉。应注意检查电压表及其接线是否正确，保险丝是否熔断。

　　(4) Sometimes the voltage of the generator is normal, but because the voltmeter has no indication, it is easy to cause illusion. Pay attention to check whether the voltmeter and its wiring are correct and whether the fuse is blown.

　　以上是焦化发电机组厂家为大家介绍的相关内容，想要了解更多内容，欢迎访问网站：//www.gz-yanye.com

　　The above is the relevant content introduced by the coking generator set manufacturer. For more information, please visit the website: //www.gz-yanye.com