7.2 PM (Permanent-Magnet) Motors
Sensorless vector control is an operation that carries out vector control without speed feedback
from the motor but, instead, with an estimation of the motor rotation speed calculated by the
inverter.
240V, 30 HP ~ 125 HP, 480V, 150 HP ~ 800 HP, and all 575V inverters do not include SVC
control of PM motors.
• For high-performance operation, the parameter values of the motor connected to the inverter output
must be estimated. Configure the motor-related function group parameters (MOT Group) by entering
the motor specification values from the name plate.
• Then, perform auto tuning by setting MOT-11 (Auto Tuning) to 4 [All (PM)] to automatically measure
other parameters before operating a PM synchronous motor in sensorless vector control mode.
• For high-performance PM sensorless vector control, the inverter and the motor must have the same
capacity. The inverter control may be inaccurate if the motor capacity and the inverter capacity do not
match.
• In sensorless vector control mode, do not connect multiple motors to the inverter output.
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