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This paper proposes a new estimation method of the maximum torque ampere (MTPA) current phase at low-speed based on an “Ld model”, which is a mathematical model that is robust to magnetic saturation for interior permanent magnet synchronous motors. In general, sensorless control techniques based on high frequency signal injection methods have been applied at low-speed drive. Those methods can guarantee...
This paper proposes a new identification method for position sensorless control of Interior Permanent Magnet Synchronous Motors (IPMSMs) based on an unknown input observer. In position sensorless control, precise motor parameters are required to accurately estimate the rotor position. Thus, these parameters should be identified prior to the realization of position sensorless vector control. However,...
This paper proposes a novel flux model for position sensorless control of Interior Permanent Magnet Synchronous Motors (IPMSMs), which can approximately estimate maximum torque control frame. The proposed model can directly estimate the maximum torque control (MTC) frame robustly to magnetic saturation. In addition, this paper proposes the decoupling control method on MTC frame based on the proposed...
This paper proposes a new robust position sensorless control of Interior Permanent Magnet Synchronous Motors(IPMSMs) to inductance variation using the un-known input observer. In position sensorless control of IPMSMs, accurate motor parameters are required for position estimation. However, inductance variation due to magnetic saturation is known to heavily deteriorate performance of sensorless control...
This paper proposes a robust-adaptive scheme for position sensorless control of interior permanent magnet synchronous motors (IPMSMs), which can improve robust stability in low-speed operation. It has been pointed out that the performance of position sensorless control system extremely degrades in very low-speed region including standstill, since the back-emf voltage of the motor would be very low,...
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