Energy-saving principle of motor soft starter

Motor soft start is throughUsing step-down, compensation or frequency conversionand other technical means to realize the smooth starting of the motor and mechanical load, reduce the influence of the starting current on the power grid, and protect the power grid and mechanical system.

One is to make the motorOutput torqueMeet the requirements of the mechanical system for starting torque, ensure smooth acceleration, smooth transition, and avoid destructive torque impact;

Two is to makeThe starting current meets the bearing capacity of the motor.To avoid insulation damage or burning caused by motor starting heat;

Three is to make the starting current meet the power gridQuality related standard requirements, reduce the voltage transient drop, reduce the high harmonic content, etc.

Fourth, soft starter and frequency converter are two completely different products.

Frequency converter is used in the need of speed regulation, by changing the output frequency to achieve the motor speed adjustment, frequency converter is generally long-term working system; frequency converter has all the soft starter function.

The soft starter is used for motor starting, the starting process ends, and the soft starter exits

Energy-saving principle

The motor soft starter itself is not energy-saving. First, it is not an electrical equipment, but a simple functional product to realize the soft start of the motor. Second, it works for a short time and exits after starting.

However, the application of motor soft start technology can achieve energy saving of drag system:

1, reduce the motor starting requirements of the power system, power transformer selection can ensure that always run in the economic operation zone, reduce the power transformer operation loss, so as to save energy.

2. The motor starting problem is solved by the soft starting device to avoid the phenomenon of large horse-drawn trolley.