Invertek Drives OPTIDRIVE E3 User Manual page 34

The autotune will begin IMMEDIATELY following the setting of this parameter!
o The drive output will be enabled, and the motor shaft may move. It is important to ensure this is safe before carrying out the
autotune.
o For IM motors, the autotune takes only a few seconds, and measures only the motor stator resistance. Parameter P-55 will be
updated with the new value.
 A djust the Low Frequency Torque Boost
o IM motors require some additional voltage at low frequency to improve the low speed operation and torque.
o By adjusting P-1 1, it is possible to optimise the low speed operation.
o If P-1 1 is increased too far, excessive motor heating or over current trips may result.
 S peed regulation and response to load changes may be improved by adjusting P-1 1 Vector Gain to suit the motor and connected
load.
o Higher values will provide a more dynamic behaviour at the risk of instability.
Synchronous Permanent Magnet AC Motors (PM), BLDC Motors and LSPM Motors
Suitable Motors
Optidrive E3 provides open loop control of permanent magnet AC motors including BLDC and LSPM type, intended to allow the use
of high efficiency motors in simple applications. Both interior and exterior magnets type motors are supported.
Operation is permitted with motors meeting the following criteria:
 T he motor Back EMF is >=1 V / Hz.
o NOTE Operation of motors with <1V/Hz Back EMF ratio may be possible with reduced speed range.
 M aximum motor frequency 360Hz.
 R MS Back EMF must not exceed the AC supply voltage during motor operation.
o Warning! If the peak Back EMF exceeds 800V, the drive may be permanently damaged!
Commissioning Procedure
When operating with permanent magnet motors, the commissioning steps are as follows:
 E nter the motor Back EMF at Rated Frequency / Speed in parameter P-07.
o This parameter must not be set to the rated motor voltage, but the actual Back EMF imposed by the motor magnets at the drive
output terminals.
o It is sometimes necessary to derive this information from a voltage constant and the rated operating speed, e.g.
 I f a motor has rated speed 2500RPM, back EMF constant 80V / 1000 RPM, P-07 = (2500 * 80) / 1000 = 200V.
 A lternatively, obtain the value from the motor supplier, or by direct measurement using an oscilloscope.
 E nter the Motor Rated Current in P-08.
o It is possible that excessive current levels may permanently damage the motor, therefore this parameter must be set correctly to
ensure this cannot occur.
o Additionally, this current level is used by the autotune to determine the correct inductance values.
 E nter the motor rated frequency in P-09.
 O ptionally enter the motor rated speed in P-10.
 E nabled Advanced Parameter Access by setting P-14 = P-37 + 100 (Default : 201).
 S elect the appropriate motor type in P-51
6
o For PM motor control P-51 = 2
o For BLDC motor control P-51 = 3
o For LSPM motor control P-51 = 5
 C arry out an Autotune.
o An Autotune MUST be carried out.
o This is achieved by setting P-52 = 1.
o The autotune will begin IMMEDIATELY following the setting of this parameter! The drive output will be enabled, and the motor
shaft may move. It is important to ensure this is safe before carrying out the autotune.
o For PM motors, the autotune measures the motor stator resistance and both Q and D axis inductance values. Parameters P-55,
P-56 and P-57 will be updated following the measurements.
 I t should now be possible to operate the motor.
34 | Optidrive ODE-3 IP66 Outdoor Rated User Guide | Version 1.00 www.invertekdrives.com