Brushless automatic motor soft starter
The brushless self-control motor soft starter directly mounts the starting resistor on the rotating shaft of the motor, and uses the centrifugal force generated when the motor rotates as the power to control the size of the starting resistor to reduce the starting current of the motor, increase the starting torque, and make the winding type Asynchronous motor realizes the device of brushless automatic control operation. It is mainly composed of a casing, a starting fluid, a moving plate, a spring, a binding post, a safety valve, an exhaust valve and the like. The starter has the characteristics of small starting current, large starting torque, automatic adaptation to changes in power supply and load, and protection of the motor. Widely used in metallurgy, machinery, petroleum, chemical, mining, building materials, paper, rubber, water plants, power stations and other industrial fields of ball mills, crushers, fans, pumps, beaters, air compressors, rolling mills, hot mills, Starting of a wound-wound asynchronous motor in a motor drive device such as an oxygen generator. It can replace the slip ring of the winding motor, the carbon brush and its starting device.
product advantages
The starter adopts brushless and non-loop operation, which is easy to operate, easy to install and disassemble, can greatly reduce the maintenance cost, and can automatically change the size of the starting resistor according to the characteristics of the mechanical load, adjust the starting torque and starting current to make the motor in the best. Starting state.
The starting current can be reduced from 7Ie to 1.6Ie while keeping the starting torque of the motor constant, and the motor can be started with maximum torque. It has evolved from a resistor starter with the following innovations:
1. Completely eliminate all kinds of hazards caused by the use of slip rings and carbon brushes. Eliminate traditional, complex starting devices, easy to operate, and reduce maintenance costs.
2. Save installation space and secondary circuit cable, reduce power consumption of the starting device, and save energy.
3. The start control is automatically completed by the starter according to the speed of the motor, which completely avoids the failure of other starter devices to automatically track the start process of the motor and cause damage to the motor or starter according to the size of the load.
4. During the operation of the motor, if there is a stall phenomenon, as the motor speed decreases, the starter will automatically enter the operation to increase the motor torque and reduce the starting current.
5. Overcome the defect that the starting torque of the stator-controlled motor soft starter is proportional to the square of the starting current. When the starting current of the motor is reduced, the starting torque of the motor is increased, and the motor can be started with the maximum torque. Brushless operation, eliminating the traditional, cumbersome, multi-contact components of the starting device, the power loss of the starting device and the starting time of the motor is reduced by more than 10 times than the stator controlled motor soft starter, but the comprehensive price of the starter is not as good. 1/3 of other soft starters.
6. The starting resistor is directly mounted on the rotating shaft of the motor. When the motor rotates, centrifugal force is generated as power, and the size of the resistor is controlled to reduce the starting current of the motor, increase the starting torque, and achieve the purpose of brushless automatic control operation.
7, using anti-rust, anti-deterioration, anti-freeze (ice snack -25 ° C), anti-boiling (boiling point of 120 ° C) four anti-starting liquid to improve the life of the starter.
8. Set the safety exhaust valve to automatically open the exhaust valve after the motor speed reaches the rated speed to ensure the safe and reliable operation of the starter.
