In the field of mining processing, large ball mills are commonly used grinding equipment.But did you know?The starting method of the ball mill has a great impact on its performance and energy efficiency.The start-up methods of large ball mills include direct start, soft start and frequency conversion start. The characteristics of each start-up method are described below.

1. Traditional direct start method

The traditional direct start method is to directly power up the motor and let it start working.This method is simple and crude, and it starts quickly, but the disadvantages are also obvious.Due to the great current at the moment of start-up, it not only causes a greater impact on the motor itself and is easy to damage, but also has a very large impact on the power grid, which may cause voltage fluctuations in the power grid and affect the normal operation of other equipment.Although the cost is low, it has become somewhat outdated in the context of the pursuit of high efficiency and energy saving in modern society.

2. Soft starter start method

In order to solve the problem of direct startup, people invented a soft starter.The soft starter gradually increases the voltage to make the motor start smoothly, reduces the start-up current, protects the motor and the power grid, and extends the life of the equipment.This method is more advanced than direct startup, but there are still certain limitations.Although the starting current is reduced, the energy efficiency ratio is not high due to the lack of speed control accuracy, which cannot meet the needs in certain situations.

3. the inverter start method

With the development of technology, the start-up method of frequency converter has come into being.By adjusting the power supply frequency, the inverter can start the motor smoothly, with high control accuracy and good energy efficiency.The start-up of the inverter not only reduces the start-up current, protects the equipment, but also improves work efficiency, has a significant energy-saving effect, and has less impact on the power grid.In modern society, INVERTER start-up has become the mainstream.