YASKAWA FSDrive-MV1000 - d5: Torque Control

2.4 d: Reference Settings
YASKAWA ELECTRIC TOEP C710687 03B FSDrive-MV1000 Parameter Guide 149
u d5: Torque Control
Torque Control defines a setpoint for the motor torque and is available for CLV (A1-02 = 3).
n
Torque Control Operation
Torque control can be enabled either by setting parameter d5-01 to 1 or by a contact input (H1- = 71). Figure 2.39
illustrates the working principle.
Figure 2.39
Figure 2.39 Torque Control Block Diagram
The externally input torque reference is used as the target value for the motor output torque. If the motor torque reference
and the load torque are not in balance when in Torque Control, the motor accelerates or decelerates. To prevent operation
beyond the speed limit, compensate the external torque reference value if the motor speed reaches the limit. The
compensation value is calculated using the speed limit, speed feedback, and the speed limit bias.
If an external torque compensation value is input, it is added to the speed limit compensated torque reference value. The
value calculated is limited by the L7- settings, and is then used as the internal torque reference, which can be
monitored in U1-09. The L7- settings have highest priority. The motor cannot be operated with a higher torque than
the L7- settings even if the external torque reference value is increased.
Torque Compensation
External Torque Reference
External Speed Limit
Speed Limit set in d5-04
Speed Feedback
Speed Limit Bias d5-05
Soft
Starter
d5-03
1
2
C1- , C2-
Torque Reference Delay
d5-02
Torque
Limits
L7-
Internal Torque
Reference
+
Compensated torque
reference
d5-08
+
U1-09
Speed Limiter
common_TMonly
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