Permanent Magnet Motor (Menu Index 4.2.4) - Danfoss iC2 Application Manual

Application Guide | iC2-Micro Frequency Converters
Enter the value from the motor nameplate data. This parameter is available only when P 4.2.1.1 Motor Type is set to [1] PM, Non-salient
PM.
Note: Changing this parameter affects the settings of other parameters.
Default value:
Size Related
Parameter
126
number:
Data type:
uint32

Permanent Magnet Motor (Menu Index 4.2.4)

7.5.2.4
P 4.2.4.1 Back EMF
Set the nominal back EMF for the motor when running at 1000 RPM. Back EMF is the voltage generated by a PM motor when no
frequency converter is connected, and the shaft is turned externally.
Back EMF is normally specified for nominal motor speed or for 1000 RPM measured between 2 lines.
If the value is not available for a motor speed of 1000 RPM, calculate the correct value as follows. If back EMF is, for example, 320 V at
1800 RPM, it can be calculated as 1000 RPM: Back EMF = (Voltage/RPM)*1000 = (320/1800)*1000 = 178.
This parameter is only active when P 4.2.1.1 Motor Construction is set to options that enable PM (Permanent Magnet) motors.
Default value:
Size Related
Parameter
140
number:
Data type:
uint16
When using PM motors, it is recommended to use brake resistors.
P 4.2.4.3 d-axis Inductance Ld
Enter the value of the d-axis inductance. Obtain the value from the permanent magnet motor datasheet or perform an AMA on a cold
motor.
Default value:
Size Related
Parameter
137
number:
Data type:
int32
P 4.2.4.4 d-axis Inductance LdSat
This parameter corresponds to the inductance saturation of Ld. Ideally, this parameter has the same value as P 4.2.2.3 Nominal Current.
However, if motor supplier provides an inductance curve, the inductance value at 100% of P 4.2.2.3 Nominal Current should be entered
here.
Default value:
Size Related
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Parameter type:
Unit:
Access type:
Parameter type:
Unit:
Access type:
NOTICE
Parameter type:
Unit:
Access type:
Parameter type:
Range (0.1–10000.0)
Nm
Read/Write
Range (Size Related)
V
Read/Write
Range (Size Related)
mH
Read/Write
Range (Size Related)
AB413939445838en-000301 / 130R1254 |
127