Recently, we have received a lot of inquiries from customers, mainly to solve the problem of large current in the motor starting process, many customers are asking us whether a good solution, today we will give you an introduction:
As an indispensable driving equipment in modern industrial production, the stability of the starting process directly affects the service life of the equipment, the stability of the power grid and the safety of production. Therefore, the soft starter has become one of the application schemes of motor starting.
Soft starter is a novel motor control device which integrates soft start, soft stop and various kinds of protection. It is mainly composed of three opposite parallel thyristors connected in series between the power supply and the controlled motor and its control circuit. By controlling the conduction Angle of the thyristor, the input voltage of the controlled motor changes according to different requirements, so as to realize the smooth start, stop and operation of the motor.
When the motor is started, due to the gap between the rotor and the stator of the motor, it needs to consume a lot of current to overcome this gap, which will produce impact load on the power grid. According to the relevant data, the current when the motor starts is usually 4-7 times the rated current, such a large current will have a huge impact on the power grid, resulting in power grid voltage fluctuations, and even cause power grid failures. The soft starter can gradually increase the starting current and limit the starting current of the motor within a reasonable range, thus avoiding the problem of instantaneous voltage fluctuations in the power grid.
When high power motor is started, it is easy to cause mechanical damage and failure due to mechanical overload. The soft starters can adjust the start time and speed of the motor, thereby reducing the mechanical pressure of the motor and avoiding damage caused by mechanical overload. According to statistics, the use of soft starter start motor, its mechanical failure rate can be reduced by more than 30%, greatly extending the service life of the equipment.
The motor soft starter has a variety of protection, such as overload, overheating, and lack of equal protection, which can further ensure the safe and reliable operation of the equipment. The use of motor soft starters can not only reduce the fluctuation of grid voltage and current, improve the quality of grid power supply, but also reduce energy consumption and operating costs, saving a lot of energy costs for enterprises.
Post time: Aug-02-2024