21st October 2019

gozuk
15

What is the difference between soft starter and drive?

Soft starters and variable frequency drives are two different purpose products. VFD is for AC motor speed control, it's not only change the output voltage but also change the frequency; Soft starter is a regulator actually for motor starting, just changing the output voltage.

Simply so, why we are using soft starters?

A motor soft starter is a device used with AC electrical motors to temporarily reduce the load and torque in the power train and electric current surge of the motor during start-up.

What is the soft start?

A soft starter is a solid-state device that protects AC electric motors from damage caused by sudden influxes of power by limiting the large initial inrush of current associated with motor startup. They provide a gentle ramp up to full speed and are used only at startup (and stop, if equipped).

What is an SCR in a soft start?

SCRs in reduced voltage. soft starters. Application. A typical three-phase soft starter uses six SCRs oriented in an anti-parallel configuration to provide start and run control to industrial motors. The most common mode of SCR failure is the SCR shorting.
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