soft starer

Starting of Induction Motor ,[object Object],[object Object],[object Object],[object Object],[object Object]

Un-Necessary Mechanical Effects ,[object Object],[object Object],[object Object],[object Object],[object Object]

Un-Necessary Electrical Effects ,[object Object],[object Object]

Problems Arises by these Effects ,[object Object],[object Object],[object Object],[object Object]

Solution of the problems….. ,[object Object],[object Object]

Block Diagram I M THYRs Protective Devices Firing Pulse Generator µ- Controller Control Signal Power Signal Soft Starter 3- ø Supply

[object Object],[object Object],[object Object],[object Object],Fig.1 Fig.2 Starting Principle of Soft Starter

Characteristics of soft starter Current/speed curve with Soft start DOL Soft start Torque/speed curve with Soft start DOL Soft start Load Torque

Features of soft starter ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Soft starting feature ,[object Object],[object Object],Current/speed curve with soft starter Soft start DOL

Kick starting feature ,[object Object],[object Object],[object Object],DOL Kick Start 400%

Soft stopping feature ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Working: During ramp-down the controller will gradually reduce the voltage to the motor thus reducing the torque and current. As a consequence the motor speed will fade off. Soft Stopping Ramp

Current limiting feature Current Limiting This mode of soft starting is used when it becomes necessary to limit the maximum starting current due to long start times or to protect the motor. ,[object Object],[object Object],[object Object],Current Limiting Curve

Comparison of soft starter with DOL and Y/ Δ starter ,[object Object],[object Object],[object Object],Voltage/Time Characteristic Soft

Comparison of soft starter with DOL and Y/ Δ starter 6-700% 100% Soft Starter Soft start Current/Time Characteristic Torque/Speed Characteristic

Low voltage soft starter (208-575V,9-900A) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Classification of soft starter Medium voltage starter(1.0-13.8 kv) ,[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Advantages ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Advantages(cont…..) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Disadvantages ,[object Object],[object Object],[object Object],[object Object]

Some applications ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],All these and many other applications have been obtained by soft starter.

soft starer

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