IF08CZ10 April, 2019
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CIRCUIT OPERATION (cont’d)
Vector Control IQ Limit (Torque current limit)
The IQ limit has a flat characteristic from 0 to base speed and tapers from base to top speed. The
following settings are used to adjust the limits.
LMT_IQ_BAS: Base speed torque current limit. Set 110%, 115%, etc. according to OL
specification of the drive.
LMT_IQ_TOP: Top speed torque current limit. Set as required by the application or set the same
as the base limit when field weakening is not used.
LMT_IQ_INV: Regeneration torque current limit. Set to 1 or 2%. This Drive cannot regenerate.
LMT_SP_BASE: The upper speed of the drive at which LMT_IQ_BASE is used. Set 125% for
applications that do not use field weakening. Otherwise set as required by the
application.
LMT_TRQ:
Torque reference motoring absolute limit. The maximum motoring torque reference
allowed regardless of speed. Set to the base speed torque current limit.
LMT_TRQ_INV: Torque reference regeneration absolute limit. The maximum regeneration torque
reference allowed regardless of speed. Set to 2%.
IQ limit
IQMAX4
Speed
IQ limit
Normal rotation
acceleration
Normal rotation
deceleration
Inverse rotation
deceleration
Inverse rotation
acceleration
Magnetic
flux reference
FL_R
IQ limit calculation
LMT_IQ_BAS
LMT_IQ_TOP
LMT_IQ_INV
LMT_SP_BASE
Speed feedback
LMT_IQ_TOP
LMT_IQ_INV
LMT_SP_BASE
LMT_IQ_BAS
100%
LMT_TRQ
X
Torque
limit
IQ limit
IQ Limit
Содержание T300MTX
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