8T motor vehicles have a variety of voltage levels (110V, 132V, 140V), and there are two types of safety and explosion-proof special. 8T 110V and 8T 132V electric locomotive for the first transmission, belong to the first generation of products, it has a simple structure, reliable operation characteristics. 8T 140V electric locomotive is the first generation of 8T locomotive improved products, with large battery capacity, locomotive center of gravity stability, good lookout features. The product has reasonable structure design, high reliability and stable operation. More than 8T locomotive can be derived according to user requirements double headed cab, can use IGBT chopper speed regulation, frequency conversion speed control system. The use of IGBT chopper control our locomotive main circuit, chopper shutdown capability, with the integrated trigger circuit voltage source, timer, combination of components, the circuit has less components, convenient installation, easy debugging and reliable work. The industrial experiment proves that the device has simple circuit, no runaway phenomenon and greatly reduces maintenance workload. Using the device of locomotive start steady, uniform speed, flexible operation, strong overload capacity, saving energy about 30%, prolongs the service life of the battery, welcome by drivers, maintenance personnel and grass-roots management personnel. The utility model has the advantages of convenient installation and operation, as long as all the resistance speed regulating devices of the original locomotive are all dismantled, the lead wire is connected to the corresponding terminal of the device. Can start, speed, parking, reversing function. Three, this product uses the main locomotive for "coal mine safety regulations" (2010 Edition) by place of traction harvesters group, mineral, transportation equipment and personnel. Four, the use of a, altitude of not more than 1200m. B, ambient air high temperature is +40 DEG C, low temperature is -20 C. C, a large wet month average relative humidity is 95% (the same month average low temperature is not more than +25 DEG C).