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In drive systems the most used control structure is the cascade control with an inner torque, i.e. current and an outer speed control loop. The fairly small converter switching frequency in high power applications, e.g. wind turbines lead to modest speed control performance. An improvement bring the use of a current controller which takes into account the discrete states of the inverter, e.g. DTC...
Speed control of salient pole permanent magnet synchronous motor (PMSM) is studied based on energy-shaping and port-controlled Hamiltonian (PCH) system theory. Firstly, the PCH speed control model of PMSM is established. Secondly, the desired equilibrium point of the system is obtained based on maximum torque per ampere (MTPA) control principle. Then the speed controllers are designed when the load...
This paper presents a novel fuzzy logic controller (FLC) based high speed operation of an interior permanent magnet synchronous motor (IPMSM) for high performance industrial drive applications. In the proposed control scheme for high speed operations above the rated speed, the operating limits of IPMSM are expanded by incorporating the maximum torque per ampere (MTPA) operation in constant torque...
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