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This paper concerns performance of a direct torque and flux controlled 14-pole/18-slot fractional-slot concentrated-winding interior permanent magnet synchronous machine (FSCW-IPMSM) in deep flux-weakening region. For the optimum operation of the machine, voltage limit, current limit, MTPA and MTPV trajectories defined on the torque-flux plane are incorporated in the control algorithm. In the experiment,...
The flux weakening control is significant for the interior permanent magnet synchronous motor to obtain a wide constant power range which is required in the electric vehicle application. A representative flux weakening method is to design an outer voltage loop using the voltage reference and the voltage limit. If the characteristic current of the motor is less than the current limit, the deep flux...
This paper concerns the wide-speed-range operation of a 14-pole/18-slot fractional-slot concentrated-winding interior permanent magnet synchronous motor (FSCW-IPMSM), mainly focusing on the deep flux-weakening operating region where maximum torque per voltage (MTPV) control is applied. If the characteristic current is less than the rated current of the machine, MTPV trajectory control can be incorporated...
The magnet flux linkage to ¿-axis inductance is defined as characteristic current, which is a key factor to determine the Constant Power Speed Range (CPSR) and flux weakening performance of Interior Permanent Magnet (IPM) machines. Therefore, it is critical to predict the accurate value of the characteristic current when considered as an objective or constraint in an optimization process of IPM machines...
Recent research suggest many flux weakening control techniques for interior permanent magnet synchronous motors. The most established one is the use of two current controllers to control the direct and quadrature axis current components such that the total flux linkage is reduced. If the characteristic current of the motor is less than the rated current of the system, maximum torque per voltage control...
Direct torque control has been widely accepted as a simple but effective control method for AC motor drives. It is robust to parameter variations since only stator resistance is used in the algorithm. However, to obtain high performance motor drives, the stability and robustness of direct torque control in the field-weakening region must be guaranteed. Some of the existing research proposals are parameter...
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