• 제목/요약/키워드: Induction capability

검색결과 137건 처리시간 0.031초

교류-교류 행렬변환기를 이용한 유도전동기의 벡터제어 구현 (Implementation of Vector control for induction motor using the AC-AC matrix converter)

  • 김우현
    • 한국산업융합학회 논문집
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    • 제6권1호
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    • pp.3-10
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    • 2003
  • Application of matrix converter to vector control of induction motor using simplified Venturini algorithm which is capable of achieving the maximum output voltage is developed. This algorithm simplifies the control algorithm and therefor reduces the digital implementation time. Matrix converter is used as voltage-referenced voltage fed vector controlled induction motor drive. This paper describes the performance of vector controlled induction motor with four quadrant capability employing a matrix converter power circuit. The advantage of this system over the conventional rectifier-inverter arrangement are capability for regeneration into the utility, sinusoidal supply currents and minimum passive components. The steady-state and transient performance of the induction motor drive under the vector control technique is demonstrate with simulation and experiment results.

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산업체 전력다소비 설비의 수요관리 기여도 및 효율향상 보급에 대한 경제성 평가분석 (Contributions of Large-Industrial Enterprise to Demand-Side Management and Economic Analysis on Diffusion of Energy Efficiency Measures)

  • 김성철;박종진
    • 조명전기설비학회논문지
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    • 제26권2호
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    • pp.18-26
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    • 2012
  • Though electricity consumption amount in industry has been increased gradually, corresponding power supply show symptoms of marginal point. Importance of demand-side management from large-industries has also been raised. This paper deals with induction motor, which is one of representative examples of heavy electricity consumption utilities, to analyze potential technical capability, economic feasibility from consumers' viewpoint and demand-side management feasibility from nation-wide perspective. Nation-wide economic feasibility analysis was done through California test, which has been used as demand-side management evaluation model. This paper also describes limitation of existing high efficiency induction motor in terms of contribution to demand-side management and utilizes premium motor to calculate demand-side management contribution level and economic feasibility evaluation. Likewise, this paper emphasizes the efficiency improvement of induction motor and analyzes how much premium motor related technologies can contribute to demand-side management.

약계자 영역에서 유도 전동기의 고정자 자속 기준 최대 토크 운전을 위한 전압 제어 기법 (Voltage Control Strategy for Maximum Torque Operation of Stator-Flux-Oriented Induction Machine Drive in the Field-Weakening Region)

  • 김홍주;유재성;원충연;김은집;조현규;김상훈
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2005년도 전력전자학술대회 논문집
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    • pp.30-32
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    • 2005
  • In this paper, voltage control strategy for maximum torque operation of stator flux-oriented induction machine drive in the field-weakening region is proposed. In a conventional stator flux-oriented (SFO) induction machine drive system of the maximum torque capability cannot be obtained. The field-weakening method is used to vary the stator-flux reference in proportion to the inverse of the rotor speed. The proposed algorithm, based on the voltage control strategy, ensures the maximum torque operation over the field-weakening region. The proposed algorithm, voltage control strategy for maximum torque operation of capability, which is insensitive to the variation of machine parameters In the field-weakening region. The proposed algorithm is verified by simulation.

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약계자영역에서 유도전동기의 고정자자속 기준 제어를 위한 최적 기준자속 선정방법 (Selection of Optimal Stator Flux Reference of Stator Flux-Oriented Induction Machine Drive in Field Weakening Region)

  • 신명호;현동석;조순봉
    • 대한전기학회논문지:전기기기및에너지변환시스템부문B
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    • 제49권7호
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    • pp.494-499
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    • 2000
  • In a conventional stator flux-oriented(SFO) induction machine drive system, the field weakening method is to vary flux reference in proportion to the inverse of the rotor speed. This paper investigates that maximum torque capability cannot be obtained in the conventional system and proposes a new selection method of flux reference to obtain maximum torque capability over the field weakening region by considering voltage, torque, and current limits.

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능력가변을 위한 단상유도전동기의 극수변환 방법에 관한 연구 (A Study of the Pole Change Method of the Single-Phase Induction Motor for Capability Variation)

  • 김규헌;정태욱
    • 한국산업융합학회 논문집
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    • 제23권3호
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    • pp.499-505
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    • 2020
  • Capacitor-run single-phase induction motor is cheaper than motors that use permanent magnets and is widely used in home appliances and industries based on relatively high durability and productivity. It can also be operated by line. However speed cannot be controlled because the line frequency is free. In this paper we dealt pole change method one of the method controlling speed of capacitor-run single-phase induction motor. The conventional pole change method is difficult to improve the power and efficiency of the motor because the composition of the pole change device is complex and do not have enough area of the windings because of windings not used according to the driving conditions. In this paper, we proposed the pole change method that is used main windings and auxiliary windings at 4 poles operation and used auxiliary windings as compensation windings at 2 poles operation. The proposed method was verified through finite element analysis.

1/4 마력급 압축기의 성능 개선을 위한 SPIM 회전자의 충진율에 관한 연구 (Fill Factor of Rotor of Single Phase Induction Motor for the Capability Improvement of 1/4 HP Compressor)

  • 김강원;안현진;최준호;한재현;김의선;임영철
    • 조명전기설비학회논문지
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    • 제29권8호
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    • pp.90-97
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    • 2015
  • This paper discusses to the capability improvement of the 1/4 HP compressor. And, for efficiency improvement of the single phase induction motor, this paper has proposed a casting method to improving the fill factor of the rotor of the single phase induction motor. First, by using FEM, it was analyzed the magnetic flux distribution and the fill factor to the SPIM rotor by the conventional method and the proposed method. And, based on the FEM analysis results, SPIMs are manufactured by the each casting process. Through experiments using dynamometer, they were compared and measured to their efficiencies. In addition, through experiments using Calorimeter, we have analyzed the refrigerating capacity of the compressor of which they were applied. Based on the results of the previous two experiments, they are to verify the validity of the proposed method.

Chilled Beam 공조시스템의 유인성능 해석 (Study on Induction Capability of Chilled Beam HVAC System)

  • 김정엽;신현준;김지석;주상현
    • 설비공학논문집
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    • 제25권5호
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    • pp.255-260
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    • 2013
  • Since a chilled beam system can reduce the conveyance energy for air conditioning and has many advantages in terms of constructability and indoor environment, its supply has been rapidly expanding mainly in Europe. For this chilled beam system to be effectively available in Korea, a product suitable for the domestic climatic environment and HVAC system operating conditions needs to be developed. Also, domestic products need to have an edge in cost competitiveness compared to overseas products. In this study, the induction structure of a chilled beam is deduced and an analysis on the induction performance is carried out while the chilled beam system that meets domestic situations is in the process of development.

고주파 유도가열을 적용한 사출성형품의 웰드라인 개선 (Improvement of Weldlines of an Injection Molded Part with the Aid of High-Frequency Induction Heating)

  • 서영수;손동휘;박근
    • 한국소성가공학회:학술대회논문집
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    • 한국소성가공학회 2009년도 추계학술대회 논문집
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    • pp.437-440
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    • 2009
  • High-frequency induction is an efficient way to heat mold surface by electromagnetic induction in a non-contact manner. Thanks to its capability of rapid heating and cooling of mold surface, it has been recently applied to the injection molding. The present study applies the high-frequency induction heating for elimination of weldlines in an injection-molded plastic part. To eliminate weldlines, the mold temperature of the corresponding weld locations should be maintained higher than the glass transition temperature of the resin material. Through experiments, the maximum temperature of $143^{\circ}C$ is obtained on the mold surface around the elliptic coil, while the temperature of the mold plate is lower than $60^{\circ}C$. An injection molding experiment is then performed with the aid of induction heating, and the effect of induction heating conditions on the surface appearance of the weldline is investigated.

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FLC-FNN 제어기에 의한 유도전동기의 ANN 센서리스 제어 (ANN Sensorless Control of Induction Motor with FLC-FNN Controller)

  • 최정식;고재섭;정동화
    • 전기학회논문지P
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    • 제55권3호
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    • pp.117-122
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    • 2006
  • The paper is proposed artificial neural network(ANN) sensorless control of induction motor drive with fuzzy learning control-fuzzy neural network(FLC-FNN) controller. The hybrid combination of neural network and fuzzy control will produce a powerful representation flexibility and numerical processing capability. Also this paper is proposed. speed control of induction motor using FLC-FNN and estimation of speed using ANN controller. The back Propagation neural network technique is used to provide a real time adaptive estimation of the motor speed. The error between the desired state variable and the actual one is back-propagated to adjust the rotor speed so that the actual state variable will coincide with the desired one. The proposed control algorithm is applied to induction motor drive system controlled FLC-FNN and ANN controller, Also, this paper is proposed the analysis results to verify the effectiveness of the FLC-FNN and ANN controller.

유도가열기용 직.병렬 공진 고주파 인버터의 설계 (Design of High Frequency Inverter with Series-parallel Load-Resonant for Induction Heating application)

  • 홍순일;손의식
    • 조명전기설비학회논문지
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    • 제14권6호
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    • pp.12-17
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    • 2000
  • IN induction heating system the high frequency operation allows a rapid response to current fluctuation in the inverter and result in improved welding quality. To work induction heating of nonferrous metals, a welding power supply is need high working frequency and high power. This paper is shown design technique for increasing working frequency in induction heating for welding coppers. A series-parallel resonate inverter consists of H-type bridges, each of whose arms is composed of a combination of two parallel IGBTs. Inverter operating with the fixed frequency is controlled by pulse width modulation (PWM). As switching adapted the Zero-Voltage Switching technique to reduce switching losses the system is high efficiency. The propose inverter has feature which is high efficiency for very wide load variations with a narrow range of duty cycle ratio control and load short circuit capability. Detailed experimental results obtained from a 48[V] output, 500[W] experimental inverter are presented to verify the concept.

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