The Experts below are selected from a list of 26937 Experts worldwide ranked by ideXlab platform
Akira Chiba - One of the best experts on this subject based on the ideXlab platform.
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Current Waveform for Noise Reduction of a Switched Reluctance Motor Under Magnetically Saturated Condition
IEEE Transactions on Industry Applications, 2018Co-Authors: Jihad Furqani, Masachika Kawa, Kyohei Kiyota, Akira ChibaAbstract:A novel method is proposed to derive the Current Waveform to reduce noise and vibration of a switched reluctance motor in a magnetically saturated region. Principle of noise and vibration reduction is based on reducing the variation of the radial force sum. To realize the minimum variation in the sum of the radial forces, radial force expression has been derived. In a magnetically saturated region, radial force expression is approximated with Fourier series with parameters as a function of Current. With the proper approximation of radial force, the Current Waveform is derived to minimize the variation of the radial force sum. The proposed Current Waveform consists of dc, fundamental, second, and third harmonic components. Finite-element analysis and experiment result are included to show the validity of the proposed method.
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noise reduction of switched reluctance motor with high number of poles by novel simplified Current Waveform at low speed and low torque region
IEEE Transactions on Industry Applications, 2016Co-Authors: Noboru Kurihara, Jacob Bayless, Hiroya Sugimoto, Akira ChibaAbstract:In this paper, the theoretical strategy and experimental results for noise reduction of a switched reluctance motor with a high number of poles are presented using a novel simplified Current profile at low speed and low torque region. The noise reduction is carried out by the principle of reducing the variation of the sum of radial forces. The variation of the sum of three-phase radial forces of the A-phase tooth, the B-phase tooth, and the C-phase tooth is a cause of vibration and acoustic noise. Thus, the variation of the sum of these forces is aimed to be minimized by Current profiling. In this paper, a simple Current Waveform with reduced harmonic order is proposed. This has advantages of low rate of change of the Current, easy Current regulation, low root mean square (rms) and peak Currents, low torque ripple, and higher efficiency. An improved Current regulation method is also implemented. In experiment, it has been found that significant noise and vibration reductions can be achieved with the proposed Current Waveform.
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Current Waveform for noise reduction of switched reluctance motor in magnetically saturated condition
2016 IEEE Energy Conversion Congress and Exposition (ECCE), 2016Co-Authors: Jihad Furqani, Masachika Kawa, Kyohei Kiyota, Akira ChibaAbstract:A novel method is proposed to derive the Current Waveform reduce noise and vibration of a switched reluctance motor in magnetically saturated region. Principle of noise and vibration reduction is based on reducing the variation of the radial force sum. To realize the minimum variation in the sum of radial forces, radial force expression for each phase should be derived. Radial force expression is approximated with Fourier series. With the proper approximation of radial force, the Current Waveform is derived to minimize the variation of the radial force sum. The proposed Current Waveform is consist of DC, fundamental, second, and third harmonic components. Finite element analysis and experiment result are included to show the validity of the proposed method.
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Noise and vibration reduction of switched reluctance motor with novel simplified Current Waveform to reduce force sum variation
2015 IEEE International Electric Machines & Drives Conference (IEMDC), 2015Co-Authors: Noboru Kurihara, Jacob Bayless, Akira ChibaAbstract:In this paper, theoretical strategy and experimental results of a noise and vibration reduction of a switched reluctance motor are presented. The noise and vibration reduction is carried out with a principle to reduce the variation of the sum of radial forces. The variation of a sum of three-phase radial forces of A-phase tooth, B-phase tooth and C-phase tooth is a cause of vibration and acoustic noise. Thus, the variation of the sum of these forces is aimed to be minimized by Current profiling. A simple Current reference is proposed. In experiment, an improved Current regulation method with better response is also introduced. It has been found that significant noise and vibration reductions can be achieved with the proposed Current Waveform.
E. Masada - One of the best experts on this subject based on the ideXlab platform.
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The P,Q controllable domain of a single phase PWM converter to preserve sinusoidal AC Current Waveform
IEEE Transactions on Power Electronics, 2000Co-Authors: M. Ohshima, E. MasadaAbstract:The P,Q controllable domain for any single phase utility-interactive voltage-source pulse width modulation (PWM) converter to preserve the AC Current Waveform sinusoidally, is derived mathematically to form an ellipse determined by its mains circuit parameters, independently of the PWM types. The elliptical domain was examined by and verified from both digital simulation and experiment.
Toshihiko Noguchi - One of the best experts on this subject based on the ideXlab platform.
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multilevel Current Waveform generation using inductor cells and h bridge Current source inverter
IEEE Transactions on Power Electronics, 2012Co-Authors: Suroso Suroso, Toshihiko NoguchiAbstract:This paper presents a new circuit configuration of single-phase multilevel Current-source inverter (CSI). In this new topology, a basic H-bridge CSI working as a main inverter generates a multilevel Current Waveform in cooperation with inductor cells connected in parallel as auxiliary circuits. Each inductor cell is composed by four unidirectional power switches with an inductor across the cell circuit. The inductor cells work by generating the intermediate level of the multilevel Current Waveform with no additional external dc-power sources. A simple proportional-integral controller is applied to control the intermediate-level Currents of the multilevel output Waveform. A five-level and a nine-level pulsewidth-modulation inverter configuration, with chopper-based dc-Current sources, are verified through computer simulations. Furthermore, an experimental prototype of a five-level CSI is set up and is tested. The results show that the test circuit works properly to generate the multilevel output-Current Waveform with low output harmonics by using small size of inductors without any additional external dc-power sources, which proves feasibility of the proposed strategy.
Baoyun Wang - One of the best experts on this subject based on the ideXlab platform.
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study of wireless power and information transmission technology based on the triangular Current Waveform
IEEE Transactions on Power Electronics, 2018Co-Authors: Zhou Yan, Zhu Xiang, Baoyun WangAbstract:Wireless power and information transmission (WPIT) technology can realize simultaneous wireless transmission of power and information. In this paper, the fundamental component of the triangular Current Waveform is employed to transfer power, and its third-order harmonic component is selected to transfer information. The Fourier decomposition method is conducted to analyze the triangular Current Waveform; two equivalent circuit models of the proposed WPIT system are established based on the relationship between the fundamental component and the third-order harmonic component. Harmonic components have an enlargement effect on the deviation of the fundamental frequency; this feature is used to realize the weakly coupled control between the information transmission and the efficiency of wireless power transfer. Based on the proposed harmonic communication method, the transient process and the maximum communication speed of the circuit are discussed. To achieve the high signal-to-noise ratio (SNR) communication, different space positions of the signal receiving winding are compared. Experimental results show that the proposed method provides a new solution for designing the WPIT system.
M. Ohshima - One of the best experts on this subject based on the ideXlab platform.
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The P,Q controllable domain of a single phase PWM converter to preserve sinusoidal AC Current Waveform
IEEE Transactions on Power Electronics, 2000Co-Authors: M. Ohshima, E. MasadaAbstract:The P,Q controllable domain for any single phase utility-interactive voltage-source pulse width modulation (PWM) converter to preserve the AC Current Waveform sinusoidally, is derived mathematically to form an ellipse determined by its mains circuit parameters, independently of the PWM types. The elliptical domain was examined by and verified from both digital simulation and experiment.
