• 제목/요약/키워드: Torque characteristic

검색결과 519건 처리시간 0.037초

비대칭축콘덴서 전동기의 진동토오크 특성의 해석 (Analysis on the alternating torque characteristics of capacitor motor with windings not in quadrature)

  • 오경열
    • 전기의세계
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    • 제26권4호
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    • pp.41-53
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    • 1977
  • With the equivalent series circuit analyzed aby revolving field theory and drawn by using the equivalent circuit constant ratios in capacitor motor with windings not in quadrature having space harmonics in its magnetic field (the above ratios are the equivalent circuit constants for the fundamental flux to the magnetizing reactance of the circuit), the equation for the alternating torque with twice line freequency in the motor is directly derived, and the alternating torque is measured with the self-made stator vibration angle amplitude measuring apparatus that is composed of a pickup, filter, photoelectric pickoff etc. The measured values satisfactorily compared with computed values. The properties of the alternating torque characteristics for respective harmonic fluxes and the r5esultant alternating torque characteristic, the effects of the alternating torque characteristics for respective harmonic fluxes on the resultant alternating torque characteristic, the effects of the variation in the motor constants and the equivalent circuit constant ratios for the fundamental flux on the alternating torque characteristics for respective harmonic fluxes and the resultant alternating torque characteristic, are made clear, applying the equation. There exist the optimum values of the motor constants and the equivalent circuit constant ratios for the fundamental flux for decreasing the alternating torque, and the value could be determined in design by the method presented in this paper.

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SRM의 회전자 구조에 따른 토크특성 고찰 (A Study on the Torque Characteristic of SRM Drive with Rotor Geometry)

  • 백원식;최경호;김민희;김동희
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2001년도 전력전자학술대회 논문집
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    • pp.5-8
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    • 2001
  • The low cost, ruggedness, and reliability of switched reluctance motor(SRM) drive makes them potentially suitable for many industrial applications. But the generation of a high-level torque ripple and the acoustic noise restricts the practical application range. This paper analyzes the torque characteristic of SRM according to rotor pole arc and the effect of turn-on and turn-off angles to reduce the torque ripple. The simulation result shows the different torque characteristic of each cases.

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배리어 길이에 따른 매입형 영구자석 동기전동기의 Ld, Lq 특성 파라미터에 관한 연구 (Study on the Ld, Lq Characteristic Parameter of Interior Permanent Magnet Synchronous Motor in different barrier width)

  • 장익상;진창성;정대성;김승주;박재영;이주
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2008년도 제39회 하계학술대회
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    • pp.709-710
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    • 2008
  • In this paper, we calculated permanent magnetic linkage flux ${\psi}_{\alpha}$ and Ld, Lq parameters of IPMSM and compared two model which has different barrier width. IPMSM has two kinds of torque that reluctance torque and magnetic torque. In constant torque region, using the Maxwell stress tensor method, we calculated the torque and current phase angle ${\beta}$ which has appeared maximum torque. In weakening flux region, we calculated the current phase angle ${\beta}$ which flux ${\psi}_o$ lower than limited flux ${\psi}_{omax}$. From the current phase angle ${\beta}$, we calculated torque by torque equation and compared two model characteristic.

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토크모터의 정특성과 동특성 해석 (An Analysis of Static and Dynamic Characteristics of Torque Motor)

  • 허준영;박창순
    • 드라이브 ㆍ 컨트롤
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    • 제12권1호
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    • pp.9-14
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    • 2015
  • In the early of 1950, the high response magnetic torque motor was developed for driving electro-hydraulic servo valves. Since then it has been broadly used for industrial application and the research of development or improvement of the torque motor is still being conducted. The purpose of this study is to present useful design criteria for the torque motor design. For this, torque motor is modelled and linearized. The static characteristics of the torque motor are investigated by direct computation of the derived linearlized equations. The dynamic characteristics of the torque motor are investigated with the derived transfer function by using Matlab and compared with the results of the linearlized analysis by using AMESim simulation with actual values of the physical parameters. Finally, the design criteria obtained from the analysis are reviewed.

Analysis of Torque Characteristics for the Single-phase Induction Motor Considering Space Harmonics

  • Kim Byung-Taek;Lee Sung-Ho;Kwon Byung-Il
    • Journal of Electrical Engineering and Technology
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    • 제1권3호
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    • pp.327-331
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    • 2006
  • This paper presents the analysis method for the torque characteristic of the 1-phase induction motor considering space harmonics in the air gap. The equivalent circuit method is used, where the circuit constants are obtained by classic theory. In addition, the space harmonic components in air gap magneto motive force are analyzed and added to the equivalent circuit to obtain accurate torque characteristics in low speed regions. Each torque component due to the harmonics is calculated and the total torque characteristic is obtained and compared with the measurement result.

기어 래틀 저감을 위한 시스템 파라미터 연구 (A Study on the System Parameters to Reduce the Idle Gear Rattle)

  • 안병민;장일도;최은오;홍동표;정태진
    • 한국자동차공학회논문집
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    • 제6권3호
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    • pp.88-96
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    • 1998
  • The rattle noise is the most significant in many kinds of manual gearbox nioses, which is generated at the idle stage of the engine operation. The main torsional vibrat- ion source of the driveline is the fluctuation of the engine torque. The gear rattle is impacts generating in the backlash of the free gear due to this torsional vibration. Many researchers reported the clutch torsional characteristic optimization method to reduce the idle gear rattle but only few of them give sufficient consideration to the system parameters like gear backlash, drag torque, system inertia, inertia distribution, engine torque fluctuation, idle engine rotation speed, and accessory load. In this paper, influence rate of system parameters on the gear rattle is presented and counterplans like backlash reduction, drag torque increase, inertia addition, inertia distribution modification and engine torque characteristic control are suggested.

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HEV용 매입형 영구자석 동기전동기의 회전자 극수에 따른 운전영역 및 특성 파라미터 분석 (Study on the Operation Region and Characteristic parameters in Magnetic Pole of IPMSM for HEV)

  • 장익상;김원호;진창성;이주
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2010년도 춘계학술대회 논문집
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    • pp.1402-1408
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    • 2010
  • Interior Permanent Magnet Synchronous Motor(IPMSM) produces two kind of torque that Magnetic and Reluctance torque. The permanent magnet linkage flux Ψa and d-axis and q-axis inductance have an important influence on the torque characteristic of IPMSM. Thus their accurate prediction is essential for predicting performance aspect such as the torque and flux-weakening capabilities. In this paper, we compared the characteristic parameters and operation region of two type IPMSM which has different pole numbers.

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Comparisons of Linear Characteristic for Shape of Stator Teeth of Hall Effect Torque Sensor

  • Lee, Boram;Kim, Young Sun;Park, Il Han
    • Journal of Magnetics
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    • 제17권4호
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    • pp.285-290
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    • 2012
  • Electric Power Steering (EPS) system is superior to conventional Hydraulic Power Steering (HPS) system in aspect of fuel economy and environmental concerns. The EPS system consists of torque sensor, electric motor, ECU (Electric Control Unit), gears and etc. Among the elements, the torque sensor is one of the core technologies of which output signal is used for main input of EPS controller. Usually, the torque sensor has used torsion bar to transform torsion angle into torque and needs linear characteristic in terms of flux variation with respect to rotation angle of permanent magnet. The torsion angle of both ends of a torsion bar is measured by a contact variable resistor. In this paper, the sensor is accurately analyzed using 3D finite element method and its characteristics with respect to four different shapes of the stator teeth are compared. The four shapes are rectangular, triangular, trapezoidal and circular type.

레이저빔프린터용 폴리곤 미러 스캐너 모터의 특성개선 (Performance Improvement of a Polygon Mirror Scanner Motor for Laser Beam Printer)

  • 유용민
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2015년도 제46회 하계학술대회
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    • pp.854-855
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    • 2015
  • Electric machines for office automation device such as printer and scanner have been required the low noise and vibration performance. Many researches about the low noise and vibration of polygon mirror scanner motor have been also progressed. The noise and vibration of polygon mirror scanner motor can be classified by aerodynamic, structural and electromagnetic. Electromagnetic noise and vibration can be occurred by high cogging torque and nonsinusoidal back EMF. To improve the cogging torque and back EMF characteristic, we apply unequal air-gap. To analyse characteristic of a polygon mirror scanner motor, two dimensional finite element method is used. To minimize the cogging torque of a polygon mirror motor, Kriging based on latin hypercube sampling (LHS) is utilized. As a result, the cogging torque and torque ripple improved while maintaining the back EMF and average torque.

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비례제어밸브를 이용한 유압모터 부하계의 마찰토크 해석 (Friction Torque Analysis of a Hydraulic Motor-Load System using Proportional Control Valve)

  • 유환신;박형배
    • 한국항행학회논문지
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    • 제14권5호
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    • pp.760-766
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    • 2010
  • 본 논문에서는 유압 비례 제어 밸브로 구동되는 유압모터 부하계에 존재하는 정지마찰토크와 점성마찰토크를 해석하였다. 이에 기초 실험으로 유압시스템의 에너지인 압력과 유량에 대한 특성실험을 수행하였고, 공압브레이크 시스템을 이용하여 브레이크 압력의 변화를 인가하여 마찰토크의 변화를 실험하였다. 비선형마찰과 선형마찰에 대한 해석은 유압 시스템의 마찰특성에 대하여 수행하였다.