Nord Drivesystems NORDAC LINK SK250E-FDS, Руководство пользователя

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4 Commissioning
BU 0250 en-3021 65
Pos: 172 /Anleitungen/Elektronik/FU und Starter/4. Inbetriebnahme/Inbetriebnahme Betriebsarten Motorregler (P300) [SK 1x0E, SK 2xxE, SK 5xxE]/Erläuterung der Betriebsarten (P300)_02 [SK 2xxE, SK 5xxE, SK 2xxE-FDS] @ 8\mod_1441288715508_388.docx @ 239772 @ @ 1
2. CFC closed-loop mode (P300, setting "1")
In contrast to the "0" setting "VFC open-loop mode" this is a form of control with current controlled
flux orientation (Current Flux Control). For this operating mode, which for ASMs is functionally
identical to the previously used designation "servo control", use of an encoder is essential. The
precise speed behaviour of the motor is detected and included in the calculation for control of the
motor. Determination of the position of the rotor is also possible through the use of the encoder,
whereby the initial value of the rotor position must also be determined for the operation of a PMSM.
This enables even more precise and rapid control of the drive unit.
This operating mode provides the best possible results for the control behaviour of both ASMs and
PMSMs and is especially suitable for lifting equipment applications or applications with
requirements for the highest possible dynamic behaviour (ramp times ≥
0,05 sec). The greatest
advantage of this operating mode is gained in combination with an IE4 motor (energy efficiency,
dynamics, precision).
Pos: 173 /Anleitungen/Elektronik/FU und Starter/4. Inbetriebnahme/Inbetriebnahme Betriebsarten Motorregler (P300) [SK 1x0E, SK 2xxE, SK 5xxE]/Erläuterung der Betriebsarten (P300)_03 [SK 2xxE, SK 5xxE, SK 2xxE-FDS] @ 8\mod_1441288721267_388.docx @ 239804 @ @ 1
3. CFC open-loop –mode (P300, setting "2")
CFC mode is also possible with the open-loop method, i.e. in operation without an encoder. Here,
the speed and position detection are determined by "observation" of measurements and setting
values. Precise setting of the current and speed controller is also essential for this operating mode.
This mode is especially suitable for applications with higher demands for dynamics in comparison
with VFC control (
ramp times ≥
0.25 s) and e.g. also for pump applications with high starting
torques).
Pos: 174 /Allgemein/Allgemeingültige Module/---------Seitenumbruch kompakt --------- @ 13\mod_1476369695906_0.docx @ 2265495 @ @ 1