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The emerging 650 V large current rating, Enhancement-mode (E-mode) Gallium Nitride High-Electron-Mobility Transistor (GaN HEMT) is a promising device for low to medium power, high power density converters (e.g., motor drives, battery chargers), which require high robustness levels. Thus, a comprehensive study of the short circuit behavior of high power E-mode GaN HEMT is the subject of this paper...
Synchronous Reluctance motor has recently gained popularity in applications where induction motors are normally employed. Additionally, when permanent magnets are buried in the rotor, they become an alternative for high performance applications. Some of its drawbacks such as high torque ripple and low power factor need to be overcome. The design of Synchronous Reluctance motors with asymmetric flux...
The low voltage ride through(LVRT) requirements are usually defined by the grid codes at the point of common coupling(PCC). The voltage dip types experienced at the doubly-fed induction generator(DFIG) terminals are different from the conditions at the PCC due to the characteristics and limitations of the network. This paper first analyzes the fault characteristics experienced at the terminal of the...
This paper focuses on a novel modeling method for Interior Permanent Magnet (IPM) synchronous machines. This modeling method is based on a flux table which is obtained from experimental testing. As indicated by the comparison between computer simulation and dyno testing, this modeling approach can model the nonlinear behavior of Interior Permanent Magnet synchronous machines with high fidelity without...
This paper presents a detailed calculation of the characteristics of five different topologies of permanent magnet (PM) machines for high performance traction including hybrid electric vehicles using the Finite Element Analysis (FEA) method. These machines include V-shape single layer interior PM, W-shape single-layer interior PM, Segment interior PM and Surface PM on the rotor with distributed winding...
This paper presents a novel control strategy of three-phase, boost-type and, three-Wire, single-phase AC/DC Power Converters AC/DC power converters. The proposed control algorithm is based on Sliding Mode Control methodology. The basic idea is to apply a feedback implementation of pulse-width modulation (PWM). The method exhibits low sensitivity to disturbances and fast dynamic performance in addition...
This paper analyzes and studies the methods of reducing torque pulsation in interior permanent magnet (IPM) machines with fractional-slot concentrated-winding (FSCW) for hybrid electric vehicles. Several methods are proposed to reduce the cogging torque and ripple torque for the IPM machine. Two finite element analysis (FEA) models of the IPM machine, including FSCW and integer-slot distributed windings,...
This paper presents a novel control strategy of AC/DC power converters. The proposed control algorithm is based on Sliding Mode Control methodology. The basic idea is to apply feedback implementation of pulse-width modulation (PWM). The method exhibits low sensitivity to disturbances and fast dynamic performance in addition to the main converter properties. The proposed sliding mode control method...
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