Torque Tolerance of a FOC VFD
Torque Tolerance of a FOC VFD
(OP)
Hello,
we try to optimize the parameter set of a 2.2 MW Drive with field oriented control. We try to get the best result between reference torque of the control and actual torque measured at the motor shaft. We have tolerances depending of motor speed and amplitude of the torque of around +/- 10%.
Has anybody a idee or a document how high are the standard tolerance between Actual Torque and Reference Torque of VFD's?
Thanks in advance
we try to optimize the parameter set of a 2.2 MW Drive with field oriented control. We try to get the best result between reference torque of the control and actual torque measured at the motor shaft. We have tolerances depending of motor speed and amplitude of the torque of around +/- 10%.
Has anybody a idee or a document how high are the standard tolerance between Actual Torque and Reference Torque of VFD's?
Thanks in advance





RE: Torque Tolerance of a FOC VFD
RE: Torque Tolerance of a FOC VFD
Most participants in this forum go way out of their way to avoid providing irresponsible or simply erroneous answers so, if no one has responded, I would conclude that we can't offer you a good solid trustworthy answer.
Sorry.
RE: Torque Tolerance of a FOC VFD
Who are you considering? I would be talking to Siemens, ABB, maybe GE if you are in the US, Toshiba if not (same product).
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RE: Torque Tolerance of a FOC VFD
RE: Torque Tolerance of a FOC VFD
Anybody aware of a reasonably well-written white paper making these comparisons?
RE: Torque Tolerance of a FOC VFD
I talked to another developer and he had measured a Danfoss VFD. He compared actual Power at the shaft with the active Power value of the Inverter and in the nominal point of the machine it was 5% acurate, but on other points it was up to 20% wrong. That was 35kW Inverter