Brushless the rheostat, brushless rheostatic starter (brushless frequency sensitive rheostat): the starting resistor is directly mounted on the rotating shaft of the motor, using the centrifugal force generated when the motor rotates, as the driving force to control the size of the starting resistance, to reduce the motor starter. current increase starting torque, winding asynchronous motor controlled brushless run the device. It mainly consists of the chassis, starter fluid, moving a plate, spring, terminal, safety valve, exhaust valve. The starter has a small starting current, high starting torque and automatically adapt to changes in the power supply and the load, to protect the motor. Widely used in metallurgy, machinery, petroleum, chemical, mining, building materials, paper, rubber, water plants, power plants and other industrial fields, ball mill, crusher, fans, pumps, beater, air compressors, rolling mill, hot mill, asynchronous motor wound oxygen machine motor drive device. It can replace the winding motor slip ring, carbon brush their starter. Advantages starter brushless acyclic running, simple operation, easy installation and removal, can greatly reduce the maintenance costs. And in accordance with the characteristics of the mechanical load, automatically change the size of the starting resistance, adjust the starting torque and starting current, the motor in the best starter status. In the case of holding the motor starting torque constant, so that the starting current drops from 7Le 1.6le, and the starter motor to the maximum torque. Evolved resistance starter device has the following innovations: 1, brushless fluid resistance vacuum motor starters completely eradicate the use of slip rings, the hazards caused when the carbon brushes. Get rid of the traditional, complex starting device, easy to operate. And can greatly reduce the maintenance costs. 2, saving the cables of the installation space and the secondary circuit to reduce the power consumption of the starting device, and saves energy. The start control according to the torque of the motor starter auto-complete. Completely avoid the other starting device can not be based on the size of the load, the automatic process of tracking motor starter motor or starter damage caused undesirable phenomena. 4, the motor running process, if there stall phenomenon. With the reduction of the motor speed, the starter will be automatically put into operation, to achieve the purpose of increasing the motor torque to reduce the starting current. Overcome proportional to the square of the starting torque and the starting current of the the stator control motor soft starter this defect, at the same time reduce the starting current of the motor to increase motor starting torque and maximum torque starter motor, no- brush run, get rid of the traditional, cumbersome, multi-touch components starting device, the base starting device power loss and the starting time of the motor control than the stator motor soft starter, a decrease of more than 10 times, but the starter price less than 1/3 of the soft starter. 6, the starting resistor is directly mounted on the rotating shaft of the motor, the centrifugal force generated when the motor rotates, as the driving force to control the size of the resistor, to reduce the motor starting current, to increase the starting torque, to achieve the purpose of controlled brushless run. 7, anti-rust, anti-metamorphic antifreeze (freezing point -40 degree heart), four anti starting fluid, anti-boiling (boiling point of 120 degrees) to increase the service life of the starter. 8, set safety vent valve, reach the rated speed of the motor speed,