3.5 PM Motor Set-up in VVC
plus
This section is only relevant when using a PM motor.
Set up the basic motor parameters:
•
1-10 Motor Construction
•
1-14 Damping Gain
•
1-15 Low Speed Filter Time Const.
•
1-16 High Speed Filter Time Const.
•
1-17 Voltage filter time const.
•
1-24 Motor Current
•
1-25 Motor Nominal Speed
•
1-26 Motor Cont. Rated Torque
•
1-30 Stator Resistance (Rs)
•
1-37 d-axis Inductance (Ld)
•
1-39 Motor Poles
•
1-40 Back EMF at 1000 RPM
•
1-66 Min. Current at Low Speed
•
4-13 Motor Speed High Limit [RPM]
•
4-19 Max Output Frequency
Note concerning advanced motor data:
Stator resistance and d-axis inductance values are often
described differently in technical specifications. For
programming resistance and d-axis inductance values in
adjustable frequency drives, always use line to common
(starpoint) values. This is valid for both asynchronous and
PM motors.
Par.
1-30
Stator
Resistance
(Line to
common)
This parameter gives stator winding
resistance (Rs) similar to asynchronous
motor stator resistance. When line-line
data (where stator resistance is
measured between any two lines) are
available, you need to divide it with 2.
Par.
1-37
d-axis
Inductance
(Line to
common)
This parameter gives direct axis
inductance of the PM motor. When line-
line data are available, you need to
divide it with 2.
Par.
1-40
Back EMF at
1,000 RPM
RMS (Line to
Line Value)
This parameter gives back EMF across
stator terminal of PM Motor at 1,000
RPM mechanical speed specifically. It is
defined between line to line and
expressed in RMS Value. In case the PM
Motor specifications provides this value
related to another motor speed, the
voltage must be recalculated for 1,000
RPM.
Table 3.2
Note concerning back EMF:
Back EMF is the voltage generated by a PM motor when
no drive is connected and the shaft is turned externally.
Technical specifications usually notes this voltage related
to nominal motor speed or to 1,000 RPM measured
between two lines.
3.6 Automatic Motor Adaptation
Automatic motor adaptation (AMA) is a test procedure that
measures the electrical characteristics of the motor to
optimize compatibility between the adjustable frequency
drive and the motor.
•
The adjustable frequency drive builds a
mathematical model of the motor for regulating
output motor current. The procedure also tests
the input phase balance of electrical power. It
compares the motor characteristics with the data
entered in parameters
1-20 Motor Power [kW]
to
1-25 Motor Nominal Speed
.
•
It does not cause the motor to run or harm to
the motor
•
Some motors may be unable to run the complete
version of the test. In that case, select
Enable
reduced AMA
•
If an output filter is connected to the motor,
select
Enable reduced AMA
•
If warnings or alarms occur, see
Start-up and Functional Tes...
VLT
®
AutomationDrive Instruction
Manual
MG33AM22 - VLT
®
is a registered Danfoss trademark
3-5
3
3
Содержание FC 300
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Страница 8: ...Contents VLT AutomationDrive Instruction Manual MG33AM22 VLT is a registered Danfoss trademark ...
Страница 14: ...Introduction VLT AutomationDrive Instruction Manual 1 6 MG33AM22 VLT is a registered Danfoss trademark 1 1 ...
Страница 62: ...Status Messages VLT AutomationDrive Instruction Manual 7 4 MG33AM22 VLT is a registered Danfoss trademark 7 7 ...
Страница 109: ...Index VLT AutomationDrive Instruction Manual MG33AM22 VLT is a registered Danfoss trademark 12 5 ...
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