Abstract: stepper generator is one of the stepping motor, is widely applied in the electric power industry, is a very common electric power device, it have very good power generation effect in the practical work. It will be very easy to appear in the application of current and voltage is too high. This paper is to introduce stepper motor stepper generator current is too large and the cause of the high voltage. One, the current through the step of step motor generator will be influenced by many factors in the practical application and some problems, and too much electricity is one of common fault, the cause of the failure occurs there are two main types: (1)Too much load; (2)Transmission line and ground fault or short circuit. The solution: to ensure the normal application of the stepper generator, to appear the phenomenon of excessive current given reason, and then go to the corresponding solution, for the above two reasons, solutions are respectively: (1)Reduce the load; (2)After maintenance lines, troubleshooting, you can resume normal. Second, the high voltage of the stepper motor step generator voltage is too high is also one of the common failure, the failure reasons there are two main types, respectively is: (1)Excitation device failure cause excitation; (2)In company with power grid generator power grid voltage is too high. Solution: in view of the above two different reasons caused the phenomenon of high voltage, the corresponding solutions for: (1)Timely maintenance excitation device; (2)Lower tied for the generator voltage. the main products: stepper motor, brushless motor, servo motor, stepping motor drive, brake motor, linear motor and other kinds of models of the stepper motor, welcome to inquire. Telephone: