• Title/Summary/Keyword: Parallel Power Operation Circuit

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Development of Micro-stepping Drive Circuit of Step Motor and Parallel Operation Controller (스텝 모터의 미세각 제어 구동 회로 및 병렬 운전 제어기 개발)

  • 이광운;장운식;유지윤
    • Proceedings of the KIPE Conference
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    • 1996.06a
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    • pp.56-59
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    • 1996
  • In this paper, we developed a micro-stepping drive circuit of step motor and proposed software algorithm for parallel operation of step motors drived by micro-stepping circuit. Also, we implemented a parallel operation controller with a 16-bit micro-controller.

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Circuit Design of Parallel Power Operation Equipment for Peak Power Reduction (상전원의 피크치 전력 감소를 위한 전력병합장치 회로설계)

  • Yang, Jaesoo;Kim, Donghan;Kim, ManDo
    • KIPS Transactions on Computer and Communication Systems
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    • v.3 no.9
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    • pp.273-278
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    • 2014
  • Recent use of electricity during peak hours electricity supply-demand imbalance is inevitable that limit power use force. Therefore, in this paper, a circuit of parallel power operation equipment for peak power reduction which saves the power to electricity storage device during the non-peak power time and supply from the storage power during the expected power shortages time is designed Through this circuitry, the peak power of the commercial power supply with the parallel operation and connection of the commercial power supply and the power supply of the inverter from electricity storage that is a key feature of PRS(Peak power Reduction System) can be controlled. In addition, in order to increase the efficiency, a Transless Power Circuit DC-AC inverter is developed. Moreover, a variable impedance control is applied to the storage of electric power of an Uninterruptible Power Supply associated with a commercial power source.

Power Factor Correction Circuit For Inverter Air-Conditioner Using A Parallel Drive Method (병렬구동 방식을 이용한 인버터 에어컨용 역률제어회로)

  • 정용채;정윤철;권경안
    • Proceedings of the KIPE Conference
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    • 1998.11a
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    • pp.9-12
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    • 1998
  • In this paper, the power factor correction circuit using a parallel drive method is proposed so that the high power inverter air-conditioner with 3[ph] compressor motor may obtain the cost down and the improved performance. The adequate design procedures are presented to reduce the material costs by eliminating the power factor improving LC filter and derating output capacitor and inverter switches. Using the determined components, the prototype circuit with 6[kW] power consumption is built and tested to verify the operation of the proposed circuit.

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Parallel Driven Power Supply with Low Cost Hot Swap Controller for Server (저가형 Hot Swap Controller를 가지는 병렬 구동 서버용 전원 장치)

  • Yi, KangHyun
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.67 no.6
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    • pp.738-744
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    • 2018
  • This paper proposes a low cost hot swap operation circuit of a parallel operation power supply for servers. Hot swap function for server power system is essential in 24 hour operation system such as internet data center, server, factory and etc. Server power supplies used in internet data centers have two or more parallel operations with the hot swap operation. However, the cost of the power supply is high because the controller IC for hot swap operation is very expensive. Therefore, this paper proposes a parallel-operated power supply with a low-cost hot swap controller for servers. The proposed system can operate hot swap function by using discrete devices and reduce the cost by more than 50%. A 1.2kW prototype system is implemented to verify the proposed low cost hot swap controller.

Power Factor Correction Circuit For Inverter Air-Conditioner With A Parallel Configuration To Reduce The Material Cost (재료비 절감을 위한 병렬구조를 갖는 인버터 에어컨용 역률제어회로)

  • 정용채;정윤철;권경안
    • The Transactions of the Korean Institute of Power Electronics
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    • v.4 no.2
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    • pp.122-127
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    • 1999
  • In this paper, the power factor correction circuit using a parallel drive method is proposed so that the high power inverter air-conditioner with 3[hp] compressor motor may obtain the cost down and the improved performance. The adequate design porcedures are presented to reduce the material costs by eliminating the power factor imprving LC filter and derating output capacitor and inverter switches. Using the determined components. the proto-type circuit with 6[kW] power consumption is built and tested to verify the operation of the proposed circuit.

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The Study on Parallel operation of IGBT for the Medium SE the Large capacity Inverter ($\cdot$ 대용량 인버터용 IGBT 병렬 운전 연구)

  • Park G.T.;Yoon J.H.;Jung M.K.;Kim D.S.
    • Proceedings of the KIPE Conference
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    • 2003.07a
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    • pp.430-433
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    • 2003
  • IGBTS are widely used for the industrial inverters in the mid power range at low voltage (440V$\~$660V) application. Advantageous features of the device are simple gate drive and high speed switching capability. Due to these advantages the application of IGBTS is enlarging into the high power application. However, to increase the power handling capacity at lower input voltage level, the current rating in each bridge arm must be enlarged. Therefore the parallel operation of IGBT devices is essentially needed. This paper describes the feasible parallel structures of the power circuit for the mid & the high power inverters and introduces the important design condition for the parallel operation of IGBT devices. To verify feasibility of the IGBT parallel operation, the feature of several IGBT devices (EUPEC, SEMIKRON's IGBT) are investigated and the power stacks are implemented and tested with these devices. The experimental results show the good characteristics for the parallel operation of IGBTS.

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A Study on Composition of A Novel Single Phase 3 Level Inverter Circuit (새로운 단상 3전위 인버터회로의 구성에 관한 연구)

  • 이종수;백종현
    • The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.9 no.5
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    • pp.51-56
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    • 1995
  • The transistors of single phase 3 level PWM Inverter compose output power transistors and neutral point clamping transistors, which are NPN transistors. Waveforms of driving signals for this are PWM waves for power transistors and period operating waves for neutral point clamping transistors, which signals made W-type modulation from rectangular and sine wave. The output power transistors operate at ON-time complementary and neutral point clamping transistors operate at OFF-time complementary respectively. Therefore, each transistors operate in half period at parallel. Characteristics of this inverter circuit is parallel switching method about series switching method of general inverter. As modulation of 3 level drive signals made from full-wave rectifier of sine wave and rectangular wave, which are level wave about 3 level of complementary transistor inverter. So, this circuit composed complementary operation inverter of NPN transistors only compare with PNP-NPN complementary inverter, which have high power 3 level inverter of complementary operation.

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A Study on the Application of SFCL on 22.9 kV Bus Tie for Parallel Operation of Power Main Transformers in a Power Distribution System (배전계통에 전력용 변압기 병렬운전시 22.9 kV SFCL Bus Tie 적용방안에 관한 연구)

  • On, Min-Gwi;Kim, Myoung-Hoo;Kim, Jin-Seok;You, Il-Kyoung;Lim, Sung-Hun;Kim, Jae-Chul
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.60 no.1
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    • pp.20-25
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    • 2011
  • This paper analyzed the application of Superconducting Fault Current Limiter (SFCL) on 22.9 [kV] bus tie in a power distribution system. Commonly, the parallel operations of power main transformers offer a lot of merits. However, when a fault occurs in the parallel operation of power main transformer, the fault currents might exceed the interruption capacity of existing protective devices. To resolve this problem, thus, the SFCL has been studied as the fascinating device. In case that, Particularly, the SFCL could be installed to parallel operation of various power main transformers in power distribution system of the Korea Electric Power Corporation (KEPCO) on 22.9 [kV] bus tie, the effect of the resistance of SFCL could reduce the increased fault currents and meet the interruption capacity of existing protective devices by them. Therefore, we analyzed the effect of application and proposed the proper impedance of the R-type SFCL on 22.9 [kV] bus tie in a power distribution system using PSCAD/EMTDC.

Analog Parallel Processing-based Viterbi Decoder using Average circuit (Average 출력회로를 이용한 아날로그 병렬처리 기반 비터비 디코더)

  • Kim, Hyung-Jung;Kim, In-Cheol;Kim, Hyong-Suk
    • Proceedings of the KIEE Conference
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    • 2006.10c
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    • pp.375-377
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    • 2006
  • A Analog parallel processing-based Viterbi decoder which decodes PRML signal of DVD has been designed by CMOS circuit. The analog processing-based Viterbi decoder implements are functions of the conventional digital Viterbi decoder utilizing the analog parallel processing circuit technology. The Analog parallel processing-based Viterbi decoding technology is applied for the PR(1,2,2,1) signal decoding of DVD. The benefits are low power consumption and less silicon consumption. In this paper, the comparison of the Analog parallel processing-based Viterbi Decoder which has a function of the error correction between Max operation and Average operation is discussed.

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The Comparison of PWM Converter's Topology in Electric Train (철도차량용 PWM 컨버터방식 비교)

  • 이현원;김남해
    • Proceedings of the KIPE Conference
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    • 1999.07a
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    • pp.97-100
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    • 1999
  • AC to DC single phase PWM converter for traction application requires rated high power and voltage. Therefor, series or parallel operation converters are necessary with considering the limitation of the power device specification. This paper compares the characteristic between two parallel operation of conventional PWM converter and Single phase three level converter about comparison of power circuit, cooling system control method and harmonic current by computer simulation.

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