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| 6/3/2010 6:24 PM | |
Joined: 9/27/2006 Last visit: 9/15/2025 Posts: 12408 Rating:
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Hello Berg; Hereis some basic information on Micromaster FCC and SVC, from different Siemens manuals (you will find the links in the following): FCC (Flux Current Control):Micromaster operating instructions:http://support.automation.siemens.com/WW/view/en/24523400 3.21.1.2 V/f open-loop control with flux current control (FCC) Parameter range: P1300, P1333 Warnings -Faults -Function chart number: An improved current measurement function has been developed for our MICROMASTER drive inverters. This permits the output current to be precisely determined referred to the motor voltage. This measurement guarantees that the output current is sub-divided into a load component and a flux component. Using this sub-division, the motor flux can be controlled and can be appropriately adapted and optimized in-line with the prevailing conditions. FCC operation is only activated after the FCC starting frequency P1333 has been exceeded. The FCC starting frequency P1333 is entered as a percentage to the rated motor frequency P0310. For a rated motor frequency of 50 Hz and a factory setting of P1333 = 10 %, this results in an FCC starting frequency of 5 Hz. The FCC starting frequency may not be selected too low as this has a negative impact on the control characteristics and can result in oscillation and system instability. The "V/f with FCC" control type (P1300 = 1) has proven itself in many applications. It has the following advantages with respect to the standard V/f control:
SVC (Sensorless Vector Control)
Daniel Chartier |
Last edited by: dchartier at: 6/3/2010 6:27 PM |
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