Under normal circumstances, of course, there should be no ignition. The generator slip ring will be pitted to varying degrees due to frequent ignition of the carbon brush. Haha, the bottom line is that it is. The generator slip ring has been rotated to restore its smooth surface.
The surface area of the slip ring is one thing. The most important thing is the carbon brush itself. You can't just look at the wear of the carbon brush. You should also check if the gap is significant. between the brush holder and the carbon brush is suitable, and the circlip. Whether the elasticity of the carbon brushes is appropriate and whether the brushes are discolored. In addition, you can also use a clamp meter to check whether the current distribution of each carbon brush. is uniform. If it is uneven it will cause the individual carbon brushes to spark. The quality of carbon brusheson themselves is also very important, some manufacturers' carbon brushes simply like to waste toner. inevitably catches fire. In short, it depends on the real situation! Hope this can help!