The dc motor controller could stimulate the motor to operate with 100% efficiency. The controllers have the Locked-motor protection and under voltage protection, also have the soft-start function. The controllers could protect the motor and the whole efficiently, so the controllers are more safe to use. We can provide you the special controller according with your requirements. 

Technical specification:

Rating Input Voltage:60-72V DC                      

Rating Input Current:Max.70A

Return's speed:40%

Locked-motor protection,Temperature protection