2 General conditions of operation
2.1 Supported permanent magnet motor designs
Supported designs:
• Surface mounted permanent magnet motors SMPM (preferred)
• Internal permanent magnet motors IPM
• Line started permanent magnet motors LSPM
(see Appendix 1 for instructions on commissioning this type of motor)
Not supported designs:
• Brushless DC motors BLDC
• Permanent magnet assisted synchronous reluctance motors PMASynRM
2.2 Application restrictions
• G120X only supports Encoderless operation with PMSM (p1300 = 20). It is required to
set Application class p96 = 2: Dynamic Drive Control.
• Deragging function is currently not supported with PMSM.
• High-dynamic applications are not suitable for PMSM operated from G120X.
• Flying start is not possible with PMSM. Motor must be standstill before each start.
• Regenerative applications are not released with PMSM.
• DC braking in not effective and must not be activated.
• PMSM rated voltage should be ideally ≤ 0.9 x inverter supply voltage.
Note: Some motor manufactures provide rated power grid voltage instead of the real
motor rated voltage at nominal speed and load.
If the motor nameplate shows nominal mains voltage values like 380V, 400V, 480V etc.
then see the Commissioning chapter on how to calculate motor rated voltage in such a
case.
• PMSM Multimotor applications are not allowed
• All applications requiring continues operation below 15% of motor nominal speed are
not allowed
• Operation is only allowed in range up to motor nominal speed – no operation in the field
weakening range is allowed
• Long cable + sinus wave filter systems are not generally supported (exceptions require
a customer specific test to be done)
• Maximum operating frequency is 200Hz (exceptionally up to 240Hz)
• The load inertia should not be less than 20% of the motor inertia. See p341 and p342
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