Danfoss iC7 Motion Series Application Manual page 132

Application Guide | iC7 Series Motion
Table 44: Pole Pairs (p) or Pole Number and Synchronous Motor Speed
Number of pole pairs (p)
Number of poles
50 Hz supply
60 Hz supply
The dependency of the motor's synchronous speed ns in RPM of the frequency f of the power supply in Hz (parameter 1.1.1 Grid
Frequency) and the number of pole pairs in parameter 4.2.1.2 Number of Pole Pairs is provided by the earlier formula.
For example, for a motor with 2 pole pairs (4 poles) and a frequency of the power supply of 50 Hz, the synchronous speed of the motor is:
P 4.2.1.3 AMA Mode
Automatic Motor Adaptation (AMA) is an automated test procedure providing an optimization of the motor parameters for improved
shaft performance. The measurement is performed based on the motor product label data in parameter group 4.2.2 Motor Nameplate
Data. The motor-type-specific parameters in parameter group 4.2.3 Induction Motor or parameter group 4.2.4 Permanent Magnet Motor
are recalculated and used to fine-tune the motor control algorithm. Running the AMA procedure also maximizes the automatic energy
optimization (AEO) feature of the drive. AMA also allows the automatic detection of the motor type based on the product label data.
The AMA must be run on a cold motor. Running the AMA multiple times also increases the motor temperature.
l
The AMA must be conducted with the motor at standstill.
l
Avoid generating external torque during AMA.
l
The AMA cannot run with a sine-wave filter connected.
l
Uncoupling the load from the motor is not needed.
l
The duration of the AMA depends on the power rating of the motor.
l
Changing the product label data in parameter group 4.2.2 Motor Nameplate Data also modifies the data in the parameter group
l
4.2.3 Induction Motor or 4.2.4 Permanent Magnet Motor.
Note:
The parameter automatically switches back to Off after the AMA has been performed.
4.2.1.4 Rs Measurement at Start
Use Rs measurement at start to measure the resistance of the stator (Rs) before motor start, for induction and permanent magnet motors
running FVC+. For induction motors, the rotor resistance (Rr) is also provided.
Accurate motor parameters are important for optimum motor performance, and measuring resistances before starting the motor can
help compensate for variation caused by changes in motor operating temperature.
It is important that the shaft is not rotating when the measurement is made. If it cannot be guaranteed, use DC hold to stop the shaft
before start.
P 4.2.1.5 Motor Cable Length
In some products, depending on the EMC configuration, this parameter may adjust the allowable switching frequency automatically to
achieve optimum performance of the drive system.
Depending on whether metric or imperial units are in use, give the value for the parameter in either meters (m) or feet (ft). The value
range is different with the different units.
130
| © 2023.11
1 2
2 4
3000 1500
3600 1800
3 4
6 8
1000 750
1200 900
AB318753549016en-000301 / 136R0284
6
12
500
600