ABB FDNA-01 - Torque Actual (AC;DC Drive Object)

Communication profiles 87
Vector Mode
When the drive is operating in the vector mode, the drive provides
the adapter module with a speed actual. The ODVA AC/DC drive
profile uses rpm units for the speed actual. The ODVA Speed
Actual is calculated as follows:
where
For example, for a drive speed actual of 900 rpm with a unit of 0.5
rpm, the ODVA Speed Actual is:
Torque Actual (AC/DC drive object)
This attribute indicates the actual torque at which the drive is
operating. The units are scaled by the Torque Scale attribute of the
AC/DC drive object. See Table 5. for details.
The drive provides the adapter module with a torque actual in
percent of the motor nominal torque. The ODVA AC/DC drive
profile uses Newton-meter (N·m) units for the Torque Actual. The
ODVA Torque Actual is calculated as follows:
where
Dsa = Drive speed actual in rpm
Osa = ODVA Speed Actual
Us = ODVA speed unit (see 10 ODVA SPEED SCALE on page 41)
Dta = Drive torque actual in percent of motor nominal torque
Ota = ODVA Torque Actual
Ut = ODVA torque unit
(see 11 ODVA TORQUE SCALE on page 42)
Mt = Motor nominal torque in Nm
Us
Dsa
Osa =
900
rpm0.5
rpm450
Us
Dsa
Osa ===
Ut100
MtDta
Ota
×
×
=