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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...
The power control of a novel fractional slot concentrated wound interior permanent magnet synchronous generator, directly driven by non-pitchable wind turbine emulator above base wind speeds is presented in this paper. The small scale fractional slot concentrated wound interior permanent magnet synchronous generator utilized has good flux weakening properties due to the interior permanent magnet rotor...
Traditionally, current vector controlled interior permanent magnet synchronous motors use two independent current regulators for flux-weakening operation. A novel flux-weakening control scheme which uses a single current regulator has been proposed recently. This paper compares the flux-weakening performance of an interior permanent magnet synchronous motor while running with the control schemes based...
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...
This paper introduces a novel method to improve the reliability of a reconfigurable FPGA based elevator controller, which can be used for an elevator with any number of floors, with specified inputs and outputs. It was clear that by simply changing a variable in the HDL code the controller can be generated for an elevator with required number of floors. Thus in this paper the primary implementation...
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