It has the significance of upgrading the traditional electric excitation generator with low head. Its main advantages are as follows:
1. It can work under variable speed condition and make full use of water energy under the condition of water source change;  

2. More than 20% more power than traditional generators;  

3, small size, light weight, save space;  

4, with permanent magnetic steel instead of the excitation winding, the rotor does not heat, can be made of high protection grade, long service life.