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11 results on '"Gandomkar, Ali"'

3. Deadbeat Direct Active and Reactive Power Control of Three-phase PWM AC/DC Converters.

Author

Gandomkar, Ali and Jul-Ki Seok

Subjects
*REACTIVE power control, *THREE-phase alternating currents, *AC DC transformers, *PULSE width modulation transformers, *SIMULATION methods & models
Abstract

This study focuses on a high-performance direct active and reactive power controller design that is successfully applicable to three-phase pulse width modulation (PWM) AC/DC converters used in renewable distributed energy generation systems. The proposed controller can overcome the sluggish transient dynamic response of conventional controllers to rapid power command changes. Desired active and reactive powers can be thoroughly obtained at the end of each PWM period through a deadbeat solution. The proposed controller achieves an exact nonlinear cross-coupling decoupling of system power without using a predefined switching table or bang/bang hysteresis control. A graphical and analytical analysis that naturally leads to a control voltage vector selection is provided to confirm the finding. The proposed control strategy is evaluated on a 3 kW PWM AC/DC converter in the simulation and experiment. [ABSTRACT FROM AUTHOR]

Published
2018
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10. Design optimization and analysis of AFPM synchronous motor considering electrical and thermal parameters

Author

Solmaz Kahourzade, Amin Mahmoudi, Hew Wooi Ping, Ali Gandomkar, 2013 1st International Future Energy Electronics Conference (IFEEC) Tainan, Taiwan 03-06 November 2013, Mahmoudi, Amin, Kahourzade, Solmaz, Ping, Hew Wooi, and Gandomkar, Ali

Subjects
electromagnetic fields, Electric motor, Engineering, business.industry, algorithms, AC motor, Sizing, Finite element method, genetic algorithms, Quantitative Biology::Subcellular Processes, Control theory, Electronic engineering, Waveform, Synchronous motor, business, Induction motor, Power density
Abstract

This paper presents an inside-out axial-flux permanent-magnet synchronous motor optimized by genetic algorithm based sizing equation, finite element analysis and finite volume analysis. The preliminary design is a 2-pole-pair slotted TORUS AFPM motor. The designed motor comprises sinusoidal back-EMF waveform, maximum power density and the best heat removal. The GA attained the dimensions of the motors with the highest power density. Electromagnetic field analysis of the candidate motors from GA with various dimensions was then put through FEA in order to obtain the motor's characteristics. Based on the results from GA and FEA, new candidates were introduced and then put through FVA for thermal behavior evaluation of the motor designs. Simulation results show that the designed 1kW motor satisfies the desired technical specifications while its highest temperature reaches to 87 degrees Celsius at the rated speed and the full load condition. Refereed/Peer-reviewed

Published
2013

11. Design optimization and analysis of AFPM synchronous machine incorporating power density, thermal analysis, and back-EMF THD

Author

Ali Gandomkar, Mohammad Nasir Uddin, Nasrudin Abd Rahim, Amin Mahmoudi, Solmaz Kahourzade, Wooi Ping Hew, Kahourzade, Solmaz, Gandomkar, Ali, Mahmoudi, Amin, Abd Rahim, Nasrudin, Hew, Wooi Ping, and Uddin, Mohammad N

Subjects
Total harmonic distortion, Radiation, Computer science, Cogging torque, permanent magnets, electric machinery, Condensed Matter Physics, axial flux, Sizing, Finite element method, Control theory, Magnet, Waveform, Electrical and Electronic Engineering, Synchronous motor, Power density
Abstract

This paper presents the design and analysis of an inside-out axial-flux permanent-magnet (AFPM) synchronous machine optimized by genetic algorithm (GA) based sizing equation, finite element analysis (FEA) and finite volume analysis (FVA). The preliminary design is a 2-pole-pair slotted TORUS AFPM machine. The designed motor comprises sinusoidal back-EMF waveforms, maximum power density and the best heat removal. The GA is used to optimize the dimensions of the machine in order to achieve the highest power density. Electromagnetic field analysis of the candidate machines from GA with various dimensions is then put through FEA in order to obtain various motor characteristics. Based on the results from GA and FEA, new candidates are introduced and then put through FVA for thermal behavior evaluation of the designed motors. Techniques like modifying the winding configuration and skewing the permanent magnets are also investigated to attain the most sinusoidal back-EMF waveform and reduced cogging torque. The performance of the designed 1 kW, 3-phase, 50 Hz, 4-pole AFPM synchronous machine is tested in simulation using FEA software. It is found that the simulation results fully agree with the designed technical specifications. It is also found from FVA results that the motor temperature reaches at highest temperature to 87 degrees C at the rated speed and full load under steady state condition. Refereed/Peer-reviewed

Published
2013

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