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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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The Transactions of the Korean Institute of Power Electronics
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Journal DOI :
The Korean Institute of Power Electronics
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Volume & Issues
Volume 11, Issue 6 - Dec 2006
Volume 11, Issue 5 - Oct 2006
Volume 11, Issue 4 - Aug 2006
Volume 11, Issue 3 - Jun 2006
Volume 11, Issue 2 - Apr 2006
Volume 11, Issue 1 - Feb 2006
Selecting the target year
A 16kw Rotating Anode type Monoblock X-ray Generator
Oh, Jun-Yong ; Kim, Yuen-Chung ; Kim, Hack-Seong ;
The Transactions of the Korean Institute of Power Electronics, volume 11, issue 2, 2006, Pages 97~103
This paper designs mono block type with rotating high power radiography x-ray generator and studies 16kW X-ray generator possible to adapt hospital mobile radiography and industrial X-ray equipment and design. This equipment uses rotating anode type x-ray tube at high voltage generator to generate x-ray and adds rotor operating circuit to operate rotor of x-ray tube. The size of high voltage transformer and high voltage generator is minimized by high voltage high frequency inverter has 100kHz switching frequency. Also this paper shows result of x-ray tube voltage and tube current correspond to variable load.
A Study of Regeneration Breaking Control Algorithm for Wounded-field Synchronous Motor Drive
Ryu, Ho-Seon ; Lee, Joo-Hyun ; Lim, Ik-Hun ; Park, Yo-Jip ; Kang, Youn-Jong ; Kim, Jang-Mok ;
The Transactions of the Korean Institute of Power Electronics, volume 11, issue 2, 2006, Pages 104~112
SFC(Static Frequence Converter)system has come to be used as drive large synchronous machine in many industry applications. Many papers have been presented on the control algorithm of SFC system, not the acceleration and start-up but the rated speed operation with line connection and the braking operation with regeneration which is used in the industry. Among this, this paper presents the regeneration breaking control algorithm for a large synchronous machine using SFC system. The results of experiment show that the proposed algorithm is proper and effective.
A Study on Reduction of Torque Pulsating for BLDCM Using CDTP Control Method
Kang, Byoung-Hee ; Shin, Woo-Seok ;
The Transactions of the Korean Institute of Power Electronics, volume 11, issue 2, 2006, Pages 113~119
This paper studies the torque characteristics of CDTP controlled BLDCM with various back-EMF waveforms. We propose a CDTP method to suppress torque pulsation due to commutation time and point. It is adopted to control the BLDCM with real back-EMF waveforms through the Hague's method for minimizing torque ripple. Real back-EMF waveforms are produced with a magnetic fringing factor and crest width of back-EMF. The performance and characteristics of the proposed control method are analyzed by simulation and verified through experimental results.
A Study on Gate driver with Boot-strap chain to Drive Multi-level PDP Driver Application
Nam, Won-Seok ; Hong, Sung-Soo ; SaKong, Suk-Chin ; Roh, Chung-Wook ;
The Transactions of the Korean Institute of Power Electronics, volume 11, issue 2, 2006, Pages 120~126
A gate driver with Boot-strap chain is proposed to drive Multi-level PDP sustain switches. The proposed gate driver uses only one boot-strap capacitor and one diode per each MOSFETs switch without floating power supply. By adoption of this gate driver circuits, the size, weight and the cost of the driver board can be reduced.
Implementation of Vector Controller for PMSM Using FPGA
Kim, Seok-Hwan ; Lim, Jeong-Gyu ; Seo, Eun-Kyung ; Shin, Hwi-Beom ; Lee, Hyun-Woo ; Chung, Se-Kyo ;
The Transactions of the Korean Institute of Power Electronics, volume 11, issue 2, 2006, Pages 127~134
This paper describes a fully hardware realization of vector controller for the permanent magnet synchronous motor (PMSM) using high density field programmable gate mays (FPGA). In the proposed system, the vector controller including vector transformation , PI regulator, position and speed measurement, current measurement, and space vector PWM blocks is implemented in a FPGA using a VHSIC hardware description language (VHDL). The experimental results using a 1.1kW PMSM are provided to show the validity of the proposed system.
Harmonic Analysis and Output Filter Design of NPC Multi-Level Inverters
Kim, Yoon-Ho ; Bang, Sang-Seok ; Kim, Kwang-Seob ; Kim, Soo-Hong ;
The Transactions of the Korean Institute of Power Electronics, volume 11, issue 2, 2006, Pages 135~141
In this paper, LC output filters are designed to reduce output harmonics and harmonic analysis are peformed. Generally, multilevel inverters are used in high power application and operates with low switching frequency, which, in turn, generates large output harmonics. Output filters we used to reduce output harmonics. The design approach to reduce output harmonics of the 31eve1 multilevel inverter is discussed and DSP(TMS320C31) is used for the digital control of the system. The design example is given. The designed system is verified by simulation and experiment.
A Novel Step-up AC-DC Converter with PFC by Discontinuous Current Control
Kim, Choon-Sam ; Shim, Jae-Sun ; Kim, Chun-Sik ; Lee, Hyun-Woo ; Kwak, Dong-Kurl ;
The Transactions of the Korean Institute of Power Electronics, volume 11, issue 2, 2006, Pages 142~148
In this paper, authors propose a novel step-up AC-DC converter operated with power factor correction (PFC) and with high efficiency. The proposed converter behaves with discontinuous current control (DCC) of input current. The input current waveform in the proposed converter is got to be a discontinuous sinusoid form in proportion to magnitude of at input voltage under the constant duty cycle switching. Therefore, the input power factor is nearly unity and the control method is simple. In the general DCC converters, the switching devices are turned-on with the zero current switching (ZCS). But turn-off of the switching devices is done at the maximum current. To achieve a soft switching at turn-off, the proposed converter uses a new partial resonant circuit, which results in the very low switching loss and the high efficiency of converter.
A New Soft-switched PWM Boost Converter with a Lossless Auxiliary Circuit
Choi, Hyun-Chil ;
The Transactions of the Korean Institute of Power Electronics, volume 11, issue 2, 2006, Pages 149~158
A soft-switching scheme for the PWM boost converter, ZCT (Zero current transition : ZCT) boost converter Is newly proposed to obtain the desirable features of both the conventional BWM boost and resonant converters such as easy of control, reduced switching losses and stresses, an4 low EMI. In order to achieve the soft-switching action, the proposed scheme employs an auxiliary circuit, which is added to the conventional boost converter and used to achieve soft-switching for both the main switch and the output diode while not incurring any additional losses due to auxiliary circuit itself. The basic operations, in this paper, we discussed and design guidelines are presented. Through a 100kHz, 60-W prototype, the usefulness of the proposed scheme is verified.
Mass Estimation of a Permanent Magnet Linear Synchronous Motor by the Least-Squares Algorithm
Lee, Jin-Woo ;
The Transactions of the Korean Institute of Power Electronics, volume 11, issue 2, 2006, Pages 159~163
In order to tune the speed controller in the linear servo applications an accurate information of a mover mass including a load mass is always required. This paper suggests the mass estimation method of a permanent magnet linear synchronous motor(PMLSM) 4y using the parameter estimation method of Least-Squares algorithm. First, the deterministic autoregressive moving average(DARMA) model of the mechanical dynamic system is derived. Then the application of the Least-Squares algorithm shows that the mass can be accurately estimated both in the simulation results and in the experimental results.
Fault Tolerant System for Open Switch Fault of BLDC Motor Drive
Park, Byoung-Gun ; Kim, Tae-Sung ; Ryu, Ji-Su ; Lee, Byoung-Kuk ; Hyun, Dong-Seok ;
The Transactions of the Korean Institute of Power Electronics, volume 11, issue 2, 2006, Pages 164~171
In this paper, the fault tolerant system for BLDC motor has been proposed to maintain control performance under an open switch fault of inverter. The fault identification is proposed to two methods, which are using the difference between reference and actual current, and adding voltage sensors across lower legs of inverter. The reconfiguration scheme is achieved by the four-switch topology connecting a faulty leg to the middle point of DC-link using bidirectional switches. The proposed fault tolerant system quickly recovers control performance by short fault detecting time and reconfiguration of system topology. Therefore, continuous free operation of the BLDC motor drive system after faults is available. The superior performance of the proposed fault tolerant system is proved by simulation.
Instantaneous Power Compensation Theory in Three-phase Four-wire Systems
Kim, Hyo-Sung ;
The Transactions of the Korean Institute of Power Electronics, volume 11, issue 2, 2006, Pages 172~183
This paper analyzes instantaneous power compensation theory through comparing p-q theory and cross-vector theory which were proposed by Akagi and Nabae respectively in three-phase four-wire systems. The two compensation theories are identical when there is no zero-sequence voltage component in three-phase three-wire systems, However, when the zero-sequence voltage and/or current components exist in three-phase four-wire systems, the two compensation theories we different in definition on instantaneous real power and instantaneous imaginary power. Based on the analysis, this paper presents instantaneous power compensation method that can eliminate neutral current completely without using energy storage element when the zero-sequence current and voltage components exist in three-phase four-wire systems.
The Analysis and Adjustment for the Control Parameter of HVDC System
Kim, Chan-Ki ;
The Transactions of the Korean Institute of Power Electronics, volume 11, issue 2, 2006, Pages 184~191
This paper deals with the HVDC system fault analysis and the tuning of the control parameter. This paper is based on the actual cable fault which was caused by the overvoltage due to commutation failure. In order to analyze the fault, the detailed PSCAD/EMTDC model which the sampling time is
, was made. Finally, the control parameter of HVDC system was tuned.