Motor Autotuning; Operating In Sensorless Vector Speed Control Mode; Sensorless Vector Torque Control Mode; Operation Of Three Phase Drives On Single Phase Supplies - Invertek Drives Optidrive Plus 3GV User Manual

5.7. Motor Autotuning
Optidrive Plus uses a sophisticated Voltage Vector Control Method as a factory default setting to ensure best possible motor operation. This
control method requires the Optidrive to carry out an autotune to measure certain motor parameters prior to operation, to ensure this function
operates correctly, and reduce the risk of nuisance tripping.
Whilst the autotune procedure does not drive or spin the motor, the motor shaft may still turn. It is not normally necessary to
uncouple the load from the motor; however the user should ensure that no risk arises from the possible movement of the motor
shaft.
Autotune after Factory Reset or from Factory Set Parameters
Following a factory reset (See section 5.4), the correct data from the motor nameplate should be entered in P1‐07 (Motor Rated Voltage), P1‐08
(Motor Rated Current) and P1‐09 (Motor Rated Frequency). Providing that P1‐08 is adjusted from the factory default setting, the Optidrive will
automatically carry out an autotune on the motor the first time it is enabled. During the autotune, the display will show
procedure may take several minutes to complete depending on the motor. Once the autotune is completed, the drive will operate as normal, and
no further autotuning will be required unless the motor or drive control mode is changed (P4‐01).
User Selected Autotune
The user can program the drive to carry out an autotune if required, as follows:‐
Ensure the motor nameplate values are correctly entered as described above.
Set P1‐14 = 101 to allow access to Parameter Groups 2, 3 and 4
Set P4‐02 = 1 and press the
The autotune will begin immediately when P4‐02 is set to 1, and no external enable signal is required. During the autotune
procedure, the motor shaft may turn. It is not normally necessary to uncouple the load from the motor; however the user should
ensure that no risk arises from the possible movement of the motor shaft.
5.8. Operating in Sensorless Vector Speed Control Mode
Optidrive Plus can be programmed by the user to operate in Sensorless Vector mode, which provides enhanced low speed torque, optimum motor
speed regulation regardless of load and accurate control of the motor torque. In most applications, the default Voltage Vector control mode will
provide adequate performance, however if Sensorless Vector operation is required, the following procedure should be followed:‐
Ensure the motor nameplate values are correctly entered in P1‐07 (Motor Rated Voltage), P1‐08 (Motor Rated Current) and P1‐09 (Motor Rated
Frequency)
Set P1‐14 = 101 to allow access to parameter groups 2, 3 and 4
The Motor Rated Power Factor from the motor nameplate MUST be entered in P4‐05. If this data is not available, consult the motor manufacturer
for guidance.
Set P4‐01 = 0 to select Sensorless Vector Speed Control
Set P4‐02 = 1 to carry out an motor autotune
Parameters P4‐03 and P4‐04 have a significant effect on the behaviour of the motor when operating in vector mode, see section 6.4 for further
details, or the Optidrive Advanced User Guide.
The autotune will begin immediately when P4‐02 is set to 1, and no external enable signal is required. During the autotune
procedure, the motor shaft may turn. It is not normally necessary to uncouple the load from the motor; however the user should
ensure that no risk arises from the possible movement of the motor shaft.
5.9. Sensorless Vector Torque Control Mode
For applications which require the drive to control motor torque as opposed to motor speed, the Optidrive Plus can be programmed to operate in
Torque Control mode. When operating this way, the drive internal ramp times (P1‐03 and P1‐04) are disabled except during starting and stopping.
Please refer to the Optidrive Plus Advanced User Guide for further information on this.
5.10. Operation of Three Phase drives on Single Phase Supplies
Applies to: ‐ Optidrive Plus, 230 Volt Supply versions, Size 3 and above
Optidrive Plus, 400 Volt Supply versions, Size 2 and above
It is possible to operate the above drive units from a single phase supply of the same rated voltage. When used in this way, the maximum output
current capacity is reduced by 50%. In order to operate on a single phase supply, the supply MUST be connected to the L1 and L2 terminals of the
drive. The user must then press
settings. Press the button to acknowledge and reset the drive. The maximum motor rated current setting in P1‐08 will now be limited to 50%
of its original value, and the Phase Loss and Phase Imbalance Protection features will be disabled.
GV
Optidrive Plus 3 User Guide
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button.
+ + for >2s. The display will show
ìP-dEF
, and all parameters will be reset to factory default
Auto-t
. The test
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