? The brushless WSZK fluid resistance of the vacuum motor starter, I developed itself in the dawn of the new century, high-tech products with independent intellectual property (patent number: 03112809.2). It is the starting resistor is mounted directly on the motor shaft for synchronous operation, the centrifugal force generated by the rotation of the motor when the direct control of the size of the resistor, and the motor speed reaches about 90% of the rated speed, the resistance drops to zero. The starter starting current, starting torque, high starting power factor, long life and other features. Widely used in metallurgy, machinery, petroleum, chemical, mining, building materials, paper, rubber, water plants, power plants and other industrial areas, ball mill, crusher, fan, water pump, beater, air compressors, rolling mill, hot mill, oxygen machines and other motor Transmission Equipment wound rotor induction motor starting. Where the original resistance starter, reactors, frequency sensitive rheostat, the liquid rheostat starter starting the wound rotor three-phase AC low-voltage induction motors (except variable speed, fitted into the camera, can be used after demolition into the camera the product) can be selected to replacement. ? (B) Description of the starter with brushless loop operation, simple operation, easy installation and removal, can greatly reduce maintenance costs, according to the characteristics of the mechanical load, automatically change the size of the starting resistance, adjust the starting torque and starting current state of optimum start the motor. The starter keep the motor starting torque constant, the starting current from 7Ie to below 3Ie, and maximum torque starter motor. It is operated by resistance device evolved as innovation points: 1, the complete eradication of the use of slip rings, the carbon brushes caused by a variety of hazards. Remove the traditional, complex starting device, easy to operate, and reduce maintenance costs. 2, save installation space and the secondary circuit of the cable, to reduce the power consumption of the starting device, and energy savings. 3, the start control by the starter motor speed automatically completed, the other starting device can not completely avoid the size of the load, automatic tracking motor was caused by damage to the motor or starter and other undesirable phenomena. 4, the motor during operation, such as stall, with the reduction of the motor speed, the starter will automatically put into operation, increasing the motor torque is reached, the purpose of reducing the current. To overcome the stator control motor soft starter starting torque and starting current is proportional to the square of this defect, at the same time reduce the motor starting current, increasing the motor starting torque and maximum torque starter motor, brushless operation, remove the traditional, cumbersome, multi-contact components of the starting device, the starting time of the power loss of the starting device and motor stator to control the motor soft starter is reduced by more than 10 times, but the price is less than the starter other soft starter 1/3. 6, the starting resistor is mounted directly on the motor shaft, the use of motor rotation when the centrifugal force generated as the driving force to control the size of the resistor, and to reduce motor starting current, to increase the starting torque to achieve brushless Controls the purpose of running. ? 7, rust, prevent deterioration, frost (freezing point -30 ° C), anti-boiling (boiling point 120 ° C)