Soft Starter<\/strong> is starting device, used for the acceleration, deceleration, and protection of the three phase electrical induction motors through the controlling applied voltage to 3 phase motor.Induction motor<\/a><\/strong> is the most frequently used motor for industrial as well as domestic applications.<\/p>\n\n\n\n
Due to its numerous applications, the induction motor needs some starting arrangements to start softly and safely. Various starting methods<\/strong> are used to start induction motors<\/strong> like star delta starter<\/a><\/strong>, DOL starter<\/strong>, auto transformer starter<\/strong>, and VFD. ( full form variable frequency drive).<\/p>\n\n\n\n
\nSoft Starter does not change frequency as VFD. Instead it Ramp up voltage level applied to motor from initial value to full voltage.<\/p>\n<\/blockquote>\n\n\n\n
This is the main difference between a Soft Starter and a VFD (variable frequency drive). Initially, the applied voltage is low which is only to overcome gear wheels or stretching driving belts etc. to avoid sudden jerks during the start. Gradually voltage increase, the torque also increases and the motor start to accelerate.<\/p>\n\n\n\n
The advantage o<\/strong>f this starting methods is the possibility to adjust torque as per exact need.<\/p>\n\n\n\n