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Powerdrive F300 User Guide 125
Issue Number: 2
1 then Stator Base Temperature (05.048) is made equal to Stator
Temperature (05.046). The Stator Resistance (05.017) and the Ld
(05.024) are then used to set up Current controller Kp Gain (04.013)
and Current Controller Ki Gain (04.014). To perform a Stationary
autotune, set Pr 00.040 to 1, and provide the drive with both an
enable signal (on terminal 29) and a run signal (on terminal 24).
• In sensorless mode, if Rotating autotune is selected (Pr 00.040 = 2),
then a stationary autotune is performed.
Following the completion of an autotune test the drive will go into the
inhibit state. The drive must be placed into a controlled disable condition
before the drive can be made to run at the required reference. The drive
can be put in to a controlled disable condition by removing the Safe
Torque Off signal from terminal 29, setting the drive Enable Parameter
(06.015) to OFF (0) or disabling the drive via the control word (Pr 06.042
& Pr 06.043).
This parameter defines the required switching frequency. The drive may
automatically reduce the actual switching frequency (without changing
this parameter) if the power stage becomes too hot. A thermal model of
the IGBT junction temperature is used based on the heatsink
temperature and an instantaneous temperature drop using the drive
output current and switching frequency. The estimated IGBT junction
temperature is displayed in Pr 07.034. If the temperature exceeds
145 °C the switching frequency is reduced if this is possible (i.e >3 kHz).
Reducing the switching frequency reduces the drive losses and the
junction temperature displayed in Pr 07.034 also reduces. If the load
condition persists the junction temperature may continue to rise again
above 145 °C and the drive cannot reduce the switching frequency
further the drive will initiate an ‘OHt Inverter’ trip. Every second the drive
will attempt to restore the switching frequency to the level set in
Pr 00.041.
The full range of switching frequencies are not available on all ratings of
the Powerdrive F300. See section 8.3 Switching frequency on page 160
for the maximum available switching frequency for each drive rating.
6.3.7 Motor parameters
Open-loop
This parameter is used in the calculation of motor speed, and in applying
the correct slip compensation. When Automatic (0) is selected, the
number of motor poles is automatically calculated from the Rated
Frequency (00.047) and the Rated Speed rpm (00.045). The number of
poles = 120 * rated frequency / rpm rounded to the nearest even
number.
RFC-A
This parameter must be set correctly for the vector control algorithms to
operate correctly. When Automatic (0) is selected, the number of motor
poles is automatically calculated from the Rated Frequency (00.047) and
the Rated Speed rpm (00.045) rpm. The number of poles = 120 * rated
frequency / rpm rounded to the nearest even number.
RFC-S
This parameter must be set correctly for the vector control algorithms to
operate correctly. When auto is selected the number of poles is set to 6.
The power factor is the true power factor of the motor, i.e. the angle
between the motor voltage and current.
Open-loop
The power factor is used in conjunction with the motor rated current
(Pr 00.046) to calculate the rated active current and magnetizing current
of the motor. The rated active current is used extensively to control the
drive, and the magnetizing current is used in vector mode Rs
compensation. It is important that this parameter is set up correctly.
This parameter is obtained by the drive during a rotational autotune. If a
stationary autotune is carried out, then the nameplate value should be
entered in Pr 00.043.
RFC-A
If the stator inductance (Pr 05.025) contains a non-zero value, the power
factor used by the drive is continuously calculated and used in the vector
control algorithms (this will not update Pr 00.043).
If the stator inductance is set to zero (Pr 05.025) then the power factor
written in Pr 00.043 is used in conjunction with the motor rated current
and other motor parameters to calculate the rated active and
magnetizing currents which are used in the vector control algorithm.
This parameter is obtained by the drive during a rotational autotune. If a
stationary autotune is carried out, then the nameplate value should be
entered in Pr 00.043.
Open-loop and RFC-A
Enter the value from the rating plate of the motor.
Open-loop
This is the speed at which the motor would rotate when supplied with its
base frequency at rated voltage, under rated load conditions (=
synchronous speed - slip speed). Entering the correct value into this
parameter allows the drive to increase the output frequency as a
function of load in order to compensate for this speed drop.
Slip compensation is disabled if Pr 00.045 is set to 0 or to synchronous
speed, or if Pr 05.027 is set to 0.
00.041
{05.018}
Maximum Switching Frequency
RW Num NC
OL
Ú
2 kHz (0), 3 kHz (1),
4 kHz (2), 6 kHz (3),
8 kHz (4), 12 kHz (5),
16 kHz (6)
Ö
3 kHz (1)RFC-A
RFC-S
00.042 {05.011} Number Of Motor Poles
RW Num US
OL
Ú
Automatic (0) to
480 Poles (240)
Ö
Automatic (0)
RFC-A
RFC-S
Ö
6 Poles (3)
00.043 {05.010} Rated Power Factor
RW Num US
OL
Ú
0.000 to 1.000
Ö
0.850
RFC-A
Ú
0.000 to 1.000
Ö
0.850
RFC-S
Ú Ö
00.044 {05.009} Rated Voltage
RW Num RA US
OL
Ú
±VM_AC_VOLTAGE_
SET
Ö
200 V drive: 230 V
50Hz default 400 V drive: 400 V
60Hz default 400 V drive: 460 V
575 V drive: 575 V
690 V drive: 690 V
RFC-A
RFC-S
00.045 {05.008} Rated Speed
RW Num ND US
OL
Ú
0 to 33000 rpm
Ö
50 Hz default: 1500 rpm
60 Hz default: 1800 rpm
RFC-A
Ú
0.00 to 33000.00 rpm
Ö
50 Hz default: 1450 rpm
60 Hz default: 1750 rpm
RFC-S
Ú
0.00 to 33000.00 rpm
Ö
3000.00 rpm
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