The utility model provides a synchronous traction generator is used to articulated formula tipper, belongs to the generator field. The technical essential is: the frame by outer set gradually the frame outer wall in to, trade hot air duct, water jacket urceolus, water course, water jacket inner tube, the frame is inside to set gradually stator core, stator winding, rotor winding, rotor core and pivot, stator winding one side be non - shaft extension side stator winding, opposite side for the shaft extension stator winding that inclines, a non - shaft extension side stator winding side -mounting centrifugal fan, shaft extension side stator winding one side is the rotatory fairing of installation, AC exciter in proper order, the end cover is arranged in shaft extension side stator winding is connected with the frame one side, terminal box base with the frame is connected, junction box cover arranges in on the terminal box base, beneficial effect is: effectively improve the protection level of generator, increased the interval of maintaining of generator complete machine, reduce maintenance time and cost, can adapt to abominable underground environment and operate and have the more long -life.