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MM 440

Created by: sus at: 2/4/2012 7:20 AM (3 Replies)

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2/4/2012 7:20 AM	Rate (0)
sus Experienced Member Joined: 6/12/2009 Last visit: 10/27/2025 Posts: 75 Rating: (0)	Dear Sir, Pls. explain me what's the differnce beet. V/F and vector control mode... Thanks in advance, Susmit.

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2/6/2012 9:38 AM	Rate (0)
JensS Posts: 739 Rating: (55)	Hi,please see parameter list p1300! and operating instruction 3.23 Open-loop/closed-loop control technique the V/f control mode as follows: P1300 = 1 : V/f with FCC (flux current control) - Maintains motor flux current for improved efficiency. - If FCC is chosen, linear V/f is active at low frequencies. P1300 = 2 : V/f with a quadratic characteristic - Suitable for centrifugal fans / pumps P1300 = 3 : V/f with a programmable characteristic - User defined characteristic (see P1320) - For synchronous motors (e.g. SIEMOSYN motors) P1300 = 5,6 : V/f for textil applications - Slip compensation disabled. - Imax controller modifies the output voltage only. - Imax controller does not influence the output frequency. P1300 = 19 : V/f control with independent voltage setpoint the Vector control mode as follows: ------------------------------------------------------------------------------- 20 Sensorless vector control 21 Vector control with sensor 22 Sensorless vector torque-control 23 Vector torque-control with sensor SLVC / VC can provide excellent performance for the following types of application: - Applications which require high torque performance - Applications which require fast respond to shock loading - Applications which require torque holding while passing through 0 Hz - Applications which require very accurate speed holding - Applications which require motor pull out protection SLVC/VC-Restrictions: - SLVC / VC is dependent on the accuracy of the motor model being used and the measurements being performed by the inverter.
JensS Posts: 739 Rating: (55)
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2/8/2012 6:54 AM	Rate (0)
Vithani Platinum Expert Joined: 7/8/2009 Last visit: 6/7/2025 Posts: 1977 Rating: (479)	Also have a look at https://www.automation.siemens.com/tf/WW/en/Posts/17343#top And refer manual too...They are having very nice explanation Regards Devesh Vithani
	I dont Like people driving Fast, thats the reason I overtake them ;)
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2/13/2012 9:00 AM	Rate (0)
sus Experienced Member Joined: 6/12/2009 Last visit: 10/27/2025 Posts: 75 Rating: (0)	Thanks to all....
	Last edited by: sus at: 2/13/2012 9:00 AM
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MM 440

Created by: sus at: 2/4/2012 7:20 AM (3 Replies)

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Last edited by: sus at: 2/13/2012 9:00 AM

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