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This paper focuses on the control of three-phase brushless asynchronous excitation system (TBAES) of the aircraft wound-field synchronous starter-generator system. Since the closed-loop control of the field current of synchronous starter-generator is hard to achieve, generally, the TBAES is powered by the onboard three-phase power system during the low speed region and cut off one phase of the onboard...
This paper proposes a sensorless control method for Wound-Rotor Synchronous Starter/Generator (WSSG) in starting process. It is necessary to identify the initial rotor position when uses sensorless control method to start-up AC machines. However, during the process of initial orientation the excitation current of the main generator contains severe pulsating components, which leads to the ineffectiveness...
In this paper the effect of the voltage vector on the amplitude of stator flux, torque angle and torque of the permanent magnet synchronous motor (PMSM) direct torque control (DTC) drive is studied. A simplified voltage vector selection strategy based on the technology of space vector modulation (SVM) is proposed. Simulation and experimental results show this control strategy can decrease stator current...
This paper discusses the control of stator flux and torque in the surface permanent magnet synchronous motor (SPMSM) direct torque control (DTC) system. The study shows the angle between stator flux vector and the applying voltage vector determines the dynamic behavior of stator flux and the angle between rotor flux vector and the applying voltage vector determines the dynamic behavior of torque....
In this paper the theory of direct torque control (DTC) in permanent magnet synchronous motor (PMSM) is investigated. The effect of zero voltage vectors on the performances of the PMSM DTC drives is analyzed. Different from the conventional switching table eliminating zero voltage vectors, a novel switching table using zero voltage vectors is proposed. Simulation results show that the PMSM DTC drives...
In this paper, a novel model for surface-mount PM (SPM), which takes the iron losses and machine parameters variation into account is presented. If the voltage of the copper resistance is ignored in the electric drive running at a high speed, the traditional equivalent circuit with a serial and parallel circuit could be transformed into a simple parallel circuit. The phasors diagram and two-axis equivalent...
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