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The direct-flux field oriented control of Interior Permanent Magnet motor drives is evaluated, with particular attention to very high speed operation in the maximum torque per voltage region. A new control technique is proposed to overcome the stability problem of direct flux control based on flux and quadrature current control. The proposed control is easy to be implemented, it is independent of...
The paper deals with a novel approach for the real-time tracking of the maximum-torque-per-ampere (MTPA) trajectory of an IPM motor drive. The proposed approach is based on the injection of proper tests signals and allows the MTPA trajectory to be learned and updated in the drive during steady-state conditions. The analytical development of the estimation algorithm, supported by a complete validation...
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