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Sinamics S120 questions

6/12/2013 12:41 AM	Rate (0)
monir Regular Member Joined: 7/16/2012 Last visit: 6/21/2024 Posts: 37 Rating: (0)	2 questions regarding sinamics s120 drive with sensorless vector control for ac induction motor 1) If i increase inertia of the motor, does speed acceleration will increase ? How can i find out what relation between motor inertia to speed acceleration ? 2) If i put proportioanl value for speed controller or current controllervery inappropriate could it cause motor damage ? Thank you

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6/12/2013 4:14 PM	Rate (0)
Technology Team Platinum Expert Joined: 10/11/2006 Last visit: 9/15/2025 Posts: 6040 Rating: (828)	Dear Monir, regarding your questions: 1) If i increase inertia of the motor, does speed acceleration will increase ? How can i find out what relation between motor inertia to speed acceleration ? The parameter J_load"load moment of inertia (p1498)" is affecting torque pre-control.As long as M = a * J_total with J_total =J_mot + J_load accelerating torque will be affected with above menioned relation. 2) If i put proportioanl value for speed controller or current controllervery inappropriate could it cause motor damage ? In general motor damage due to an inappropriate controller setting is not possible because inverter output currentis limited according to motor current. Even there are more security functions like temp.sensor or I²t-estimation which are protecting the motor. You can find further information in the Function manual for S120: (FH1), 01/2012, 6SL3097-4AB00-0AP2
	With best regards, Technology Team Application consulting and pre sales support for SINAMICS, SIMATIC Technology, SIMOTION, SIMOTICS and MOTION CONNECT
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6/13/2013 5:29 AM	Rate (0)
monir Regular Member Joined: 7/16/2012 Last visit: 6/21/2024 Posts: 37 Rating: (0)	Dear Tech Team, Thank you for your reply. If acceleration increase with inertia then does decoration rate too increase ?

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6/14/2013 11:13 AM	Rate (0)
Technology Team Platinum Expert Joined: 10/11/2006 Last visit: 9/15/2025 Posts: 6040 Rating: (828)	Dear monir, deceleration value increases simultaneously with acceleration value. Except of friction which is helping you to decelerate the load and is acting against the movementduring acceleration.
	With best regards, Technology Team Application consulting and pre sales support for SINAMICS, SIMATIC Technology, SIMOTION, SIMOTICS and MOTION CONNECT
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