• Title/Summary/Keyword: 농형유도전동기

Search Result 92, Processing Time 0.035 seconds

Calculation of the Parameter according to the Slip in Squirrel-Cage Induction Motor (Slip에 따른 농형유도전동기의 회로정수 산정)

  • Lee, Su-Jin;Lee, Jeong-Jong;Kim, Sung-Il;Hong, Jung-Pyo
    • Proceedings of the KIEE Conference
    • /
    • 2009.07a
    • /
    • pp.738_739
    • /
    • 2009
  • This paper describes the calculation of the equivalent circuit parameters according to the slip in squirrel-cage induction motor. Recently, the induction motor is demanded of the various operation condition. In order to acquire the accurate characteristic for the operation condition of the motor, equivalent circuit parameters have to be calculated accurately. So the equivalent circuit parameters are computed by using the finite element method, the reliable characteristic analysis is carried out by application of the parameter to the equivalent circuit analysis. From the analysis result using this combined equivalent circuit and finite element method is compared with the experimental results by a detailed equivalent circuit, the validity of the method is proved.

  • PDF

Thermal, Centrifugal and Electromagnetic Effect on the Rotor Bar of the Cage Induction Motor (농형유도전동기의 회전자바에 미치는 열응력, 원심력 및 전자의의 영향 연구)

  • Lee, Y.;Lee, H.Y.;Hahn, S.Y.;Kim, K.W.;Yoon, J.H.;Lee, J.I.;Kwon, J.L.
    • Proceedings of the KIEE Conference
    • /
    • 1999.11b
    • /
    • pp.3-5
    • /
    • 1999
  • This paper deals with the effect on the stress and deformation of the rotor bar of a cage induction motor by the thermal stress, centrifugal force and electromagnetic force. We use both the thermal network method(TNM) and the finite element method(FEM) to analyze the temperature and stress of the rotor.

  • PDF

Analysis of temperature rises of three phase squirrel cage induction motor considering the nonuniform distribution of thermal sources (축방향으로의 열원분포 불균일을 고려한 3상 농형유도전동기의 온도상승 해석)

  • Jun, C.S.;Kim, B.K.;Kwon, B.I.;Park, S.C.
    • Proceedings of the KIEE Conference
    • /
    • 1997.07a
    • /
    • pp.34-37
    • /
    • 1997
  • The nonuniform thermal sources of a squirrel cage induction motor are obtained from the losses calculated by the nonlinear complex finite element analysis considering skew effects. Then, temperature rises of the motor are calculated using thermal equivalent network analysis and compared with some experimental values.

  • PDF

Electromagnetic and Thermal Analysis of Squirrel Gage Canned Induction Motor for SMART Main Coolant Pump (SMART용 냉각재순환펌프에 장착되는 농형유도전동기의 전자기 및 열해석)

  • Huh, Hyung;Koo, Dae-Hyun;Kang, Do-Hyun
    • Proceedings of the KIEE Conference
    • /
    • 1999.07a
    • /
    • pp.308-311
    • /
    • 1999
  • A squirrel cage canned induction motor for the main coolant pump of the integral reactor, SMART was designed, manufactured and tested. The motor was first designed using the equivalent circuit theory to determine major dimensions and then finalized through finite element analyses for electromagnetic and thermal characteristics. In order to verify the design methodology, a reduced scale canned induction motor was manufactured and tested. The experimental results have shown a good agreement with the analysis results.

  • PDF

Calculation of Equivalent d-q Model Parameters of A Squirrel Cage Induction Motor Using Finite Element Method (유한요소법에 의한 농형유도전동기 d-q 등가모델의 회로정수 산출)

  • Choi, Chong-Sun;Koo, Tae-Man
    • Proceedings of the KIEE Conference
    • /
    • 1999.07a
    • /
    • pp.315-317
    • /
    • 1999
  • This paper presents a method for determining of the equivalent d-q model parameters of three-phase squirrel cage induction motors. The method is based on the use of a finite-element field calculation which enables the precise slot geometry to be modelled accurately, and includes the effects of magnetic saturation of iron core. The proposed method can reduce computational costs compared with the method that needs the iterative field analysis to obtain the impedance. It is verified that the circuit inductances are shown as functions of the current.

  • PDF

The analysis on magnetic flux by the rotor slot of Squirrel-cage induction motor (농형유도전동기(籠型誘導電動機)의 회전자(回轉子) 슬롯 형상(形狀)에 따른 자속밀도(磁束密度) 해석(解析))

  • Oh, Young-Soo;Lee, Eun-Woong;Lee, Dong-Ju;Moon, Jae-Yun
    • Proceedings of the KIEE Conference
    • /
    • 1998.07a
    • /
    • pp.299-301
    • /
    • 1998
  • The torque characteristic of an induction motor is affected greatly by the slot shape at which the conductors of the rotor are located. In this paper, the three analysis model; general type, deep slot type, double squirrel-cage type, of which the slot shapes are different, were analyzed by FEM at no load, at rated load, and at standstill respectively. The flux distribution and air-gap flux density were also obtained. From the above result, it was confirmed that the analysis models of deep slot and double squirrel-cage had more desirable characteristics than those of general squirrel-cage.

  • PDF

Performance of the Squirrel Cage Induction Motor with High Temperature Superconducting Rotor Bars at Stable Operating Region (고온초전도단락봉을 사용한 농형유도전동기의 안정영역 특성)

  • 심정욱;차귀수;이지광
    • The Transactions of the Korean Institute of Electrical Engineers B
    • /
    • v.52 no.9
    • /
    • pp.442-447
    • /
    • 2003
  • Motors with HTS wires or bulks have been developing recently. Those are large synchronous motor with HTS wires at the field winding in the rotor, hysteresis and reluctance motors with HTS bulk in the rotor. This paper presents the fabrication and test results of an HTS induction motor. Conventional end rings and short bars were replaced with HTS wires in the motor. Stator of the conventional induction motor was used as the stator of the HTS motor. Rated capacity and rpm at full rotor of the conventional motor were 0.75[kW] and 1,710[rpm]. Two, HTS wires are used in parallel to make the end rings and bars. The critical current of the BSCCO-2223 HTS wire which was used in the bars and end rings were 115[A]. Electrodynamometer was coupled directly to the shaft of the rotor with HTS wires.

Detection of broken rotor bars in a squirrel-cage induction motor (회전자 바 손상에 따른 농형유도전동기의 이상 신호 검출)

  • Kim, Byong-Kuk;Kim, Mi-Jung;Cho, Yun-Hyun;Hwang, Don-Ha;Kang, Dong-Sik
    • Proceedings of the KIEE Conference
    • /
    • 2007.07a
    • /
    • pp.1041-1042
    • /
    • 2007
  • This paper proposes a new method for detecting broken rotor bars in a squirrel-cage induction motor. The air-gap flux variation analysis was done using search coils inserted in stator slots when broken rotor bar occurs. An accurate modeling and analysis of air-gap flux variation in the induction motor are developed using finite-element (FE) software packages, and measurement of the flux are made using search coils. The simulation was done for the induction motor with 380 [V], 7.5 [kW], 4 Poles, 1,760 [rpm] ratings using the commercial FE analysis tool. The simulation and experiment results can be useful for detecting the broken rotor bar of an induction motor.

  • PDF

Calculation of Resistance of Cage Rotor End Ring using 3-D Finite Element Method (3차원 유한요소법을 이용한 농형유도전동기 단락환의 저항계산)

  • Bak, Min-Woo;Lee, Bok-Yong;Jung, Hae-Duk;Lee, Ki-Sik
    • Proceedings of the KIEE Conference
    • /
    • 1995.07a
    • /
    • pp.92-94
    • /
    • 1995
  • This paper is to describe a method for calculating resistance of cage rotor end-ring, based on 3-D finite element method using magnetic vector potential $\vec{A}$ and electric scalar potential ${\phi}$. The induced current of a cage rotor flows through the bars of a cage rotor. The current completes their closed paths by passing around the end-ring. The end-ring may contribute a significant influence to the performance of machine. The resistance under consideration of skin effect is calculate by using Joule's loss equation.

  • PDF

A Study on the Outside Rotor Type Induction Motor (외측회전형 유도전동기에 관한 연구)

  • 김현수;배철오;김종수
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.7 no.4
    • /
    • pp.812-818
    • /
    • 2003
  • This paper presents a developed outside rotor type induction motor for the fan. Nearly all of the induction motors consist of two parts, rotor and stator, and the position of rotor is generally inside of stator. However, the rotor of the developed induction motor is located outside of stator. It is believed that the outside rotor type induction motor is suitable for the fan due to its large inertia, that is, it is considered that the change of air flow rate resulting from input power or load fluctuation is reduced. In this paper, the two tests which are suitable to obtain the electrical parameters of the outside rotor type induction motor were described, then various parameters of outside rotor type induction motor were measured. These are the locked rotor test and no load test. By using these tests, it was possible to determine the parameters which are presented in the steady-state equivalent-circuit of the outside rotor type induction motor. Load test of induction motor was carried out using a dynamometer and the torque-speed curve was obtained. It is believed that the results of this paper can be used for the development of the outside rotor type induction motor.