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One-Chip Microcontroller에 의한 Switched Reluctance Motor의 속도제어에 관한 연구
강욱,김학성,류홍제,원충연 成均館大學校 科學技術硏究所 1993 論文集 Vol.44 No.2
The switched reluctance motor(SRM) drive is becoming an attractive candidate for replacing conventional adjustable speed ac and do drive in many industrial and consumer application like pumps, fans, household appliances and automotive actuator etc. The control method of triggering and conduction angle for variable speed drive is presented in this paper. It also describes new work in the area of electronic control of SRM. The control functions and converter switching signals are processed in low cost microcontroller. Experimental verification is provided for 8/6 pole prototype SRM drive.
Design and Comparison of Capacitor Chargers for Solid-State Pulsed Power Modulator
Hong-Je Ryoo,Suk-Ho Ahn,Ji-Woong Gong,Sung-Roc Jang IEEE 2013 IEEE transactions on plasma science Vol.41 No.10
<P>This paper describes the design, implementation, and comparison of high-voltage capacitor chargers for a solid-state pulsed power modulator (SSPPM). The three different converter topologies are a series resonant converter operating at a discontinuous conduction mode with switching frequency control (SRC_DCM_SFC), a series resonant converter operating at a continuous conduction mode with phase shifted pulse width modulation control (SRC_CCM_PSPWMC), and a series-parallel resonant converter operating at the CCM with SFC (SPRC_CCM_SFC). On the basis of these converter topologies, 10-kWaverage high-voltage capacitor chargers are designed for the three types of SSPPMs, which have the following maximum output specifications: 1) SRC_DCM_SFC: 60 kV, 300 A, 3 kpps, and 50 μs; 2) SRC_CCM_PSPWMC: 10 kV, 50 A, 50 kpps, and 10 μs; and 3) SPRC_CCM_SFC: 40 kV, 150 A, 7 kpps, and 10 μs. Although the pulse output specifications are different, it is worth comparing the resonant inverter topologies and the control methods from the viewpoint of the losses, control characteristics, and merits and demerits of the high-voltage capacitor chargers. From the analysis and investigation of the three resonant inverters, the design procedure, including the determination of the resonant tank parameters, is provided, which considers the design of the high-voltage capacitor charger. PSPICE simulation is used to elucidate the effects of the resonant tank structure and its parameters, and the resonant current waveform and losses of the Insulated Gate Bipolar Transistor are compared. Finally, experiments for each charger are performed under various load conditions, and the comparison results of the three capacitor chargers, including the conduction and switching losses, control characteristics, and overall efficiency, are discussed in this paper.</P>
A New Split Source Type Converter for SRM Drives
Ryoo,Hong-Je,Kim,Won-Ho,Rim,Geun-Hie,Kang,Wook,Park,Ji-Ho,Won,Chung-Yuen 성균관대학교 1998 학술회의지원논문목록집 Vol.1998 No.-
This paper describes a new split source type converter topology for switched reluctance motor drives. The new converter topology consists of 2 DC link capacitors, 6 switches and 6 diodes with 2 switches and 2 diodes adding to a conventional split source converter to drive an 8/6 pole SRM. The main advantage of the proposed converter is fast suppression of the tail current in the phase-winding, hence, resulting in minimization of negative torque using doubly boosted voltage in the demagnetizing mode. The control characteristics of the proposed converter is compared with those of the asymmetric bridge converter that is widely used. Through the laboratory experiments, the proposed converter has shown higher efficiency and more output power than the other counterpart in the heavy load condition and/or in the high-speed operation.
Ryoo Hong-Je,Kim Jong-Soo,Kisck Dragos Ovidiu The Korean Institute of Electrical Engineers 2005 KIEE International Transactions on Electrical Mach Vol.b5 No.4
The ability to provide quality power has become a significant issue in power systems. The main causes of poor power quality are harmonic currents, poor power factor, supply-voltage variations, etc. A technique of achieving both active current distortion compensation, power factor correction and also mitigating the supply-voltage variation (sag or swell) at the load side is presented in this paper. The operation and rating issues of the proposed Single-phase Unified Power Quality Conditioner are also highlighted. To reduce the total cost while simultaneously increasing the performance, the system is fully digitally controlled using the fixed-point TMS320F240 digital signal processor. The performances of the UPQC, which is composed by shunt and series PWM controlled-converters, have been verified on a laboratory prototype.
Hybrid Dual Mode Traction System Design For Korean High-speed Train
Hong-Je Ryoo,Tae-Jin Kim,Yong-Joo Kim,Geun-Hie Rim,Dragos O. Kisck 전력전자학회 2004 ICPE(ISPE)논문집 Vol.- No.-
This paper describes a design of hybrid dual mode traction system (hereafter refer to the HDMTS) combining normal catenary supplied high-speed electrical train with gas turbine generator in order to ensure fault-free operation for Korean High-speed Train. (hereafter refer to KHST) From the experimental train system specification of KHST, design considerations and basic system design is studied to ensure 200km/h speed operation without any supply from the catenary.<br/> For the verification of system performance the downscaled system simulator was developed and basic experiments are performed.<br/> The microturbine generator, which can represent system characteristic of gas turbine generator, will be added to ensure the combined system performance of HDMTS simulator and the experimental results using HDMTS simulator will be used for detail design and realization of real scale dual mode traction system.