Difference between soft starter and inverter

The main difference between a soft starter and an inverter lies in their functionality and purpose:

1. Functionality:

   • Soft Starter: A soft starter is primarily used to control the voltage supplied to an electric motor during startup, gradually ramping up the voltage to reduce inrush current and mechanical stress on the motor.
   • Inverter: An inverter converts direct current (DC) to alternating current (AC) and can control the frequency, voltage, and waveform characteristics of the output AC power. It is used for speed control, torque control, and energy efficiency in motor drives and various AC-powered systems.

2. Application:

   • Soft Starter: Soft starters are commonly used in applications where the main goal is to reduce the inrush current and mechanical stress during motor startup, such as in conveyor belts, pumps, and fans.
   • Inverter: Inverters are used in applications where precise control over motor speed, torque, or power output is required, such as in variable speed drives for motors, renewable energy systems (like solar inverters), and UPS systems.

3. Control:

   • Soft Starter: Soft starters control the voltage supplied to the motor during startup but do not change the frequency of the AC power.
   • Inverter: Inverters not only control the voltage but also allow for precise control over the frequency and waveform of the AC power, enabling variable speed operation and other advanced control features.

In summary, while both soft starters and inverters control the operation of electric motors, they serve different purposes and offer different levels of control over the motor's operation. Soft starters are focused on reducing inrush current and mechanical stress during startup, while inverters provide more comprehensive control over motor speed, torque, and power output.