The stall phenomenon which happens in loaded motor is unqualification in application. Meanwhile it may measure the maximum property of motor in manufacture. So the phenomenon is analyzed to find a simulation of electrical state to predict the maximum currency and torque which is a necessary method to be proceeded up to now before design. We find that the simulation fits well to the reference. The conditions of t=60s,U=22V result in the biggest stall force according to rotation to change time and voltage. Then it is t=90s,U=17V; t=30s,U=27V and t=120s,U=12V in turns. As for torque it is t=30s,U=27V; t=60s,U=22V;t=90s,U=17V and t=120s,U=12V in truns.