ABB ACS880 Firmware Manual page 31

2 – Supply voltage and motor data settings
99.07 Motor nominal voltage
The allowable range is 1/6 × U N ... 2 × U N of the drive.
With permanent magnet motors, the nominal voltage is the BackEMF voltage at nom-
inal speed. If the voltage is given in volt/rpm (eg. 60 V per 1000 rpm), the voltage at a
nominal speed of 3000 rpm is 3 × 60 V = 180 V. Note that nominal voltage is not the
same as equivalent DC motor voltage (EDCM) given by some manufacturers. The
nominal voltage can be calculated by dividing the EDCM voltage by 1.7 (or square root
of 3).
Note: For applications with sine filter and step-up transformer in use, the nominal
voltage setting in the drive is calculated for the primary side of the transformer with
consideration for the resistive and inductive losses along the circuit, i.e. 99.07 Motor
nominal voltage = (Motor plate nominal voltage / Transformer ratio) + circuit voltage
losses (typically ~10%).
99.08 Motor nominal frequency
With permanent magnet motors, if the nominal frequency is not shown on the name-
plate, it can be calculated using the following formula:
f = n × p / 60
where n = nominal motor speed, p = number of pole pairs.
99.09 Motor nominal speed
99.10 Motor nominal power
99.11 Motor nominal cosfii
99.12 Motor nominal torque
These values are not required, but can be entered to improve control accuracy. If not
known, leave at 0.
99.13 Identification run request
This parameter selects the mode of the identification run (DTC motor control mode
only).
WARNING!
The identification run modes marked thus * will run the motor in the forward
direction (see below for details). Make sure it is safe to run the motor before
choosing any of these modes.
*Normal mode should be selected whenever possible. The driven machinery must be
decoupled from the motor if
• the load torque is higher than 20%, or
• the machinery is not able to withstand the nominal torque transient during the
identification run.
*Reduced mode should be selected if the mechanical losses are higher than 20%, ie.
the load cannot be de-coupled, or full flux is required to keep the motor brake open
(eg. with conical motors).
The Standstill mode should be selected if neither the *Normal or *Reduced mode can
be used.
Note:
• This mode cannot be used with a permanent magnet motor if the load torque is
higher than 20% of nominal.
• Mechanical brake is not opened by the logic for the identification run.
Quick start-up guide 31