86 Powerdrive F300 Getting Started Guide
Issue Number: 5
Pr 00.043 {05.010} Rated Power Factor
Defines the angle between the motor voltage and
current
The power factor is the true power factor of the motor, i.e. the angle between the motor voltage and current. The
power factor is used in conjunction with the Rated Current (00.046), to calculate the rated active current and
magnetising current of the motor. The rated active current is used extensively to control the drive, and the
magnetising current is used in vector mode stator resistance compensation. It is important that this parameter is
set up correctly. The drive can measure the motor rated power factor by performing a rotating autotune (see
Autotune (Pr 00.040), below).
Pr 0.40 {5.12} Autotune
There are two autotune tests available in open loop mode, a stationary and a rotating test. A rotating autotune
should be used whenever possible so the measured value of power factor of the motor is used by the drive.
• A stationary autotune can be used when the motor is loaded and it is not possible to remove the load from
the motor shaft. The stationary test measures the Stator Resistance (05.017), Transient Inductance (05.024),
Maximum Deadtime Compensation (05.059) and Current At Maximum Deadtime Compensation (05.060)
which are required for good performance in vector control modes (see Open Loop Control Mode (00.007),
later in this table). If Enable Stator Compensation (05.049) = 1, then Stator Base Temperature (05.048) is
made equal to Stator Temperature (05.046). The stationary autotune does not measure the power factor of
the motor so the value on the motor nameplate must be entered into Pr 00.043. 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).
• A rotating autotune should only be used if the motor is unloaded. A rotating autotune first performs a
stationary autotune, as above, then a rotating test is performed in which the motor is accelerated with
currently selected ramps up to a frequency of Rated Frequency (05.006) x
2
/
3
, and the frequency is
maintained at that level for 4 seconds. Stator Inductance (05.025) is measured and this value is used in
conjunction with other motor parameters to calculate Rated Power Factor (05.010). To perform a Rotating
autotune, set Pr 00.040 to 2, and provide the drive with both an enable signal (on terminal 29) and a run
signal (on terminal 24).
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
(06.015) to OFF (0) or disabling the drive via the Control Word (06.042) and Control Word Enable (06.043).
Powerdrive F300 Getting Started Guide English Iss2.book Page 86 Tuesday, July 28, 2015 3:23 PM
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