Nord Drivesystems BU 0500, User Manual

Page: 105 / 212

5 Parameters
BU 0500 EN-1516 105
P220 Para. identification
(Parameter identification)
P
0 … 2
{ 0 }
With devices with output of 7.5 kW, the motor data is determined automatically by the device via
these parameters. In many cases, better drive behaviour is achieved with the measured motor
data.
The identification of all parameters takes some time. Do not switch off the mains voltage during
this time. If unfavourable operating behaviour takes place after identification, select a suitable
motor in P200 or set parameters P201 … P208 manually.
0 = No identification
1 = Identification R
S
:
The stator resistance (display in P208) is determined by multiple measurements.
2 = Motor identification :
This function can only be used with devices up to 7.5 kW (230 V to 4.0 kW).
ASM : all motor parameters (P202, P203, P206, P208, P209) are determined.
PMSM : the stator resistance (P208) and the inductance (P241) are determined
NB: Motor identification should only be carried out on a cold motor (15 … 25°C) Warming up of the
motor during operation is taken into account.
The FI must be in “Ready for operation” condition. For BUS operation, the BUS must be operating
without error.
The motor power may only be one power level greater or 3 power levels lower than the nominal
power of the FI.
A maximum motor cable length of 20m must be adhered to for reliable identification.
Before starting motor identification, the motor data must be preset in accordance with the rating
plate or P200. At least the nominal frequency (P201), the nominal speed (P202), the voltage
(P204), the power (P205) and the motor circuit (P207) must be known.
Care must be taken that the connection to the motor is not interrupted during the entire measuring
process.
If the identification cannot be concluded successfully, the error message E019 is generated.
After identification of parameters, P220 is again = 0.
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P240 EMF voltage PMSM
(EMF voltage PMSM)
S P
0 … 800 V
{ 0 }
The EMF constant describes the self induction voltage of the motor. The value to be set can be
found on the data sheet for the motor or on the type plate and is scaled to 1000 rpm. As the rated
speed of the motor is not usually 1000 rpm, these details must be converted accordingly:
Example:
E (EMF - constant, type plate): 89 V
Nn (rated speed of motor): 2100 rpm
Value in P240 P240 = E * Nn/1000
P240 = 89 V * 2100 rpm / 1000 rpm
P240 = 187 V
0 = ASM is used,
"Asynchronous machine is used"
: No compensation
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