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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...
This paper analyses the performance of a modified boost topology derived from a classic boost converter with higher gain for applications in motor drive operation. The bidirectional power management of the boost converter is enhanced by connecting the dc link capacitor across the boost inductor, rather than across the DC-link. The voltage regulation of the output capacitor and the average current...
In this paper, a low power delay locked-loop with modified voltage-controlled delay cell (VCDC) is proposed. This modified VCDC is designed by using Mentor Graphic CEDEC design kit and Silterra 0.13μm process technology. Thus, the DLL with proposed VCDC able to obtained low power dissipation which is 921.57μW and occupied very smaller area which is 0.03mm2.
This paper reviews the existing structures for converter stages in renewable energy and motor drive systems that offer high voltage gain at the input of an inverter. The inverter may also connect the DC supply to the utility grid. For traction motor drives in vehicle and rail transport and in high-frequency transformer connected grids, bi-directional power flow capability is also required. Cascaded...
This paper concerns the sensorless direct torque and flux control (DTFC) of a 14-pole/18-slot, fractional-slot concentrated winding interior permanent-magnet synchronous machine (IPMSM). The dynamic performance of the prototype machine at or near base speed was found to be comparable to a distributed wound IPMSM. However, the lowest operating speed of the machine under sensorless control scheme was...
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...
The quasi-Z-source inverter (qZSI) which originated from the Z-source inverter (ZSI) topology provides an alternative for the conventional two stages DC-DC/DC-AC PV based inverter system with less component number, simpler topology and overcomes some of the limitations and problem associated with the conventional inverter topology. In the application of grid-connected PV inverter system, power storage...
This paper proposes a new sensorless direct torque and flux controlled interior permanent magnet synchronous machine drive fed by a matrix converter. Closed-loop control of both torque and stator flux is achieved by using two PI controllers. The input power factor and output voltage vector are regulated with the indirect space vector modulation. An adaptive observer is used for joint stator flux and...
This paper investigates the modulation and control of a new bidirectional converter for 42V ISA system. The modulation for both rectifier and inverter is derived from the indirect space vector modulation algorithm for AC/AC matrix converter. The proposed bidirectional AC/DC power converter combines the advantages of matrix converter and Z-source inverter. The closed-loop control of input displacement...
The main aim of this paper is to explore the various dynamic controllers for regulating the reactive power requirements of grid connected wind farms. A wind farm of total capacity 7.5 MW is considered for the study. The turbines are of fixed-speed type that are equipped with squirrel-cage induction generators. The emerging devices suggested for the control of the reactive power requirement of wind...
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