• Title/Summary/Keyword: 3-Phase DC to AC inverter

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Development of the Boost Type Auxiliary Coach Converter (객차용 BOOST형 보조전원장치에 관한 연구)

  • 김태완;박건태;정기찬;이성목;김두식
    • Proceedings of the KSR Conference
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    • 2000.11a
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    • pp.727-732
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    • 2000
  • This paper is on the development of a auxiliary power supply for the coach of Indian Railways. The auxiliary power supply system supplies the power for air-conditioners, air-compressors, lighting equipments, controllers, etc. It converts the input voltage, DC 110V which is supplied from battery, to AC 3${\Phi}$ 415V of 30kVA capacity. This is a low voltage-high current type converter system and largely consists of boost chopper and 3 phase inverter. Adopting a optimal control algorithm and simple power circuit, we realized the more reliable and competitive system for satisfaction of Indian Railway's strict requirement for vibration, temperature and dust. We completed the design, the manufacture and the field test of the system successfully and proved the system performance and reliability as a result of those tests.

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A Study on the Implementation of Inverter Systems for Regenerated Power Control (회생전력 제어용 인버터 시스템의 구현에 관한 연구)

  • 金 敬 源;徐 永 泯;洪 淳 瓚
    • The Transactions of the Korean Institute of Power Electronics
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    • v.7 no.2
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    • pp.205-213
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    • 2002
  • This paper deals with the implementation of three-phase VSI systems which can control the power regenerated from DC bus line to AC supply. The overall system consists of the line-to-line voltage and line current sensors, an actual power calculator using d-q transformation method, a complex power controller with PI control scheme, a gating signal generator for modified q-conduction mode, a DPLL for frequency followup, and Power circuits. Control board is constructed by using a 32-bit DSP TMS32C32, two EFLDs , six ADCs, and a DAC. To verify the performance of the proposed system, we designed and constructed the propotype with the power rating of 5kVA at AC 220V. Experimental results show that the regenerated active power is well controlled to its command vague and the regenerated reactive power still remained at nearly zero through all operating modes.

On the Calculation of Energy Requirement for Freight Train Reefer Container and Methods of Supplying the Power

  • Kim, Joouk;Hwang, Sunwoo;Lee, Jae-Bum;Kim, Youngmin
    • International Journal of Internet, Broadcasting and Communication
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    • v.14 no.2
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    • pp.79-88
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    • 2022
  • Recently, securing stable supply of fresh food is deemed as one of the important tasks. Accordingly, now the presence of cold chain along with the needs of a comfortable and healthy life is growing as the online market expands and the contactless industry grows, however, cold chain is being studied only in the aspect of ground and sea transportation. And, due to global warming and strengthening global environmental regulations, we believe that it is necessary to convert the existing road-centered logistics system into a railway-centered logistics system, a low-carbon transportation means. Therefore, in this paper we calculated the maximum energy required by the reefer container as a basic research necessary for constructing the low temperature distribution and cold chain based on the reefer container railway, and conducted a study on methods of supplying the reefer container power utilizing 1. tramline, 2. battery, 3. generator. The results of this paper can be utilized as a foundational study for building a cold chain based on a reefer container dedicated to freight trains in the future.

Wireless Power Transfer for Electric Vehicles Charging Based on Hybrid Topology Switching With a Single Inverter

  • Chen, Yafei;Zhang, Hailong;Kim, Dong-Hee;Park, Sung-Jun;Park, Seong-Mi
    • Journal of the Korean Society of Industry Convergence
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    • v.23 no.2_1
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    • pp.115-124
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    • 2020
  • In wireless power transfer (WPT) system, the conventional compensation topologies only can provide a constant current (CC) or constant voltage (CV) output under their resonant conditions. It is difficult to meet the CC and CV hybrid charging requirements without any other schemes. In this study, a switching hybrid topology (SHT) is proposed for CC and CV electric vehicle (EV) battery charging. By utilizing an additional capacitor and two AC switches (ACSs), a double-side LCC (DS-LCC) and an inductor and double capacitors-series (LCC-S) topologies are combined. According to the specified CC and CV charging profile, the CC and CV charging modes can be flexibly converted by the two additional ACSs. In addition, zero phase angle (ZPA) also can be achieved in both charging modes. In this method, because the operating frequency is fixed, without using PWM control, and only a small number of devices are added, it has the benefits of low-cost, easy-controllability and high efficiency. A 3.3-kW experimental prototype is configured to verify the proposed switching hybrid charger. The maximum DC efficiencies (at 3.3-kW) of the proposed SHT is 92.58%.