Different the amount of current with the stationary exciter field coils differs The three-stage output from the exciter. This output is rectified by a rotating rectifier assembly mounted to the rotor, as well as the resultant DC materials the rotating area of the principle alternator and that's why alternator output. https://hejian-nuojin-auto-parts79023.slypage.com/36102383/details-fiction-and-hejian-nuojin-auto-parts-co