• Title/Summary/Keyword: Induction Motor

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Analysis of the Characteristic in the Synchronous Induction Motor (영구자석매입형 유도 동기전동기 특성 해석)

  • Yang, B.Y.;Lee, C.G.;Kwon, B.I.;Han, M.K.
    • Proceedings of the KIEE Conference
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    • 2000.11b
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    • pp.300-302
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    • 2000
  • There are two kinds of the synchronous motor, one is an induction type motor started without a driving system, the other is the one started with an external driving system. but, both are complicated. Nowadays, in order to devoid for the synchronous motor being complicated in design, line start permanent magnet(LSPM) motors are being developed. The LSPM motor is composed of the rotor that has interior permanent magnet and aluminum bar instead of general rotor. In this paper, we analyzed the characteristics of the LSPM motor which has both characteristics of an induction motor and a synchronous motor, and we compared the the LSPM motor characteristics with the induction motor.

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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
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    • v.7 no.4
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    • pp.812-818
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    • 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.

Soft Start System of Induction Motor using Emergency Generator (비상 발전기를 이용한 유도전동기의 소프트 기동 시스템)

  • Hwangbo, Chan;Ko, Jae-Ha;Lee, Jung-Hwan;Park, Seong-Mi;Park, Sung-Jun
    • Journal of the Korean Society of Industry Convergence
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    • v.25 no.3
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    • pp.433-441
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    • 2022
  • In general, in an emergency generator system for an electric facility including an induction motor load, an emergency power generation facility larger than the facility load capacity is built due to the initial starting current of the induction motor. In order to reduce this economic burden, various methods to reduce the inrush current of induction motors are applied to suppress the additional expansion of generators due to the reduction of power generation facilities and the increase in electrical facilities. Among these methods, when a system with a built-in soft start function of an induction motor using an inverter is built, it is the best way to reduce the inrush current of the induction motor to less than the rated current. However, in this case, the installation cost of the inverter to drive the induction motor increases. This paper proposes a soft start method of an induction motor by expanding the frequency and voltage control operation area of an emergency generator. In addition, proposed a speed calculation method based on power factor information, which is essential information for stable soft start of an induction motor, and a method for generating a speed command value of the governor for starting with maximum torque.

Speed control of induction motor for electric vehicles using PLL and fuzzy logic (PLL과 fuzzy논리를 이용한 전기자동차 구도용 유도전동기의 속도제어)

  • 양형렬;위석오;임영철;박종건
    • 제어로봇시스템학회:학술대회논문집
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    • 1997.10a
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    • pp.640-643
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    • 1997
  • This paper describes speed controller of a induction motor for electric vehicles using PLL and Fuzzy logic. The proposed system is combined precise speed control of PLL and robust, fast speed control of Fuzzy logic. The motor speed is adaptively incremented or decremented toward the PLL locking range by the Fuzzy logic using information of sampled speed errors and then is maintained accurately by PLL. The results of experiment show excellence of proposed system and that the proposed system is appropriates to control the speed of induction motor for electric vehicles.

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Study On The Travelling Magnetic Field In The Linear Induction Motor With Its End Effect Taken Into Consideration (유도형 Linear Motor의 단부효과를 고려한 이동자계에 관한 연구)

  • Dal Ho Im
    • 전기의세계
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    • v.21 no.4
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    • pp.7-14
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    • 1972
  • The author has established a general equation for the travelling magnetic field in air gap with the end effect taken into consideration, which constitutes the basics for the analysis of characteristics of linear induction motor. This equation is verified by comparison of the experimental values with the theoretically calculated values. The properties of the travelling wave with attenuation, which is contained in the travelling magnetic field of linear induction motor, have been verified, and consequently the practicable equation is established with these effects taken into consideration. This provides the solid foundation for the theoretical analysis of the characteristics of the linear induction motor.

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

  • Kim, Woo-Hyun
    • Journal of the Korean Society of Industry Convergence
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    • v.6 no.1
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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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Constructed Sound Field of an Induction Motor Using Cylindrical Acoustic Holography (원통형 음향 홀로그래피를 이용하여 구성한 유도전동기의 방사 음장)

  • 김시문;김양한
    • Journal of KSNVE
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    • v.7 no.6
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    • pp.919-929
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    • 1997
  • Induction motors are used in many areas to transform electrical energy to mechanical energy. In the design of an induction motor, not only energy efficiency but also noise becomes an important factor. To effectively address the noise problem, it will be convenient if one can see where and how noise is generated and propagated. In this study sound radiation by an induction motor is visualized using cylindrical acoustic holography. To minimize the bias error by window effect Minimum Error Window(MEW) is used. Its performance is verified by numerical simulations. Based on these theoretical understanding, sound pressure measurement with an induction motor are performed. Not only sound radiation are visualized but sound pressure level and sound power level are also estimated. Results show that the main source is located at nearly bottom part of the motor and the total sound pressure level is 49dB, which satisfies the guideline value suggested by the KS C 4202.

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Hybrid Induction Motor Control Using a Genetically Optimized Pseudo-on-line Method

  • Lee, Jong-seok;Jang, Kyung-won;J. F. Peters;Ahn, Tae-chon
    • Journal of Power Electronics
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    • v.4 no.3
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    • pp.127-137
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    • 2004
  • This paper introduces a hybrid induction motor control using a genetically optimized pseudo-on-line method. Optimization results from the use of a look-up table based on genetic algorithms to find the global optimum of an unconstrained optimization problem. The approach to induction motor control includes a pseudo-on-line procedure that optimally estimates parameters of a fuzzy PID (FPID) controller. The proposed hybrid genetic fuzzy PID (GFPID) controller is applied to speed control of a 3-phase induction motor and its computer simulation is carried out. Simulation results show that the proposed controller performs better than conventional FPID and PID controllers. The contribution of this paper is the introduction of a high performance hybrid form of induction motor control that makes on-line and real-time control of the drive system possible.

Sensorless Speed Control of Induction Motor by Direct Torque Control with Numerical Model (수식모델의 직접토크제어에 의한 유도전동기의 센서리스 속도제어)

  • Yoon, Kyoung-Kuk;Kim, Sung-Hwan
    • Journal of Advanced Marine Engineering and Technology
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    • v.36 no.6
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    • pp.830-836
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    • 2012
  • Various control algorithms have been proposed for the speed-sensorless control for an induction motor. These control schemes are mainly based on the speed feedback with the flux and speed estimations. This paper proposes another method for the speed-sensorless control for an induction motor. The proposed scheme is based on the torque and flux compensation without speed estimations, in which the same controlled stator voltage is applied to both the induction motor and the numerical model so that the differences between torques and fluxes of the model and the induction motor may be compelled to give access to zero. The results of experiment show the effectiveness of the scheme.

Standardization Specification Research for Linear Induction Motor Type Light Rail Vehicle (선형유도모터형 경량전철 표준사양 연구)

  • Hong, Jai-Sung;Ryu, Sang-Whan;Lee, Ahn-Ho;Hwang, Hyeon-Chyeol
    • Proceedings of the KSR Conference
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    • 2007.05a
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    • pp.40-44
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    • 2007
  • Light rail vehicle is optimized vehicle system for complex urban circumstance. LRT systems have many merits such as improve accuracy, speediness and safety. There are many LRT systems such as monorail, tram, automated guideway transit, linear induction motor propulsion and so on. These systems have operated in Japan and other advanced countries. In Korea, local government has many projects to apply the advanced LRT system. But there are no standardized specification, performance test specification, construction specification for monorail system, linear induction motor propulsion system, tram in Korea up to now. So, we need to establish of standardized to economical construction and safety. The linear induction motor system has been usually applied in Japan subway and ART(Advanced Rapid Transit) of Canada. In Korea, the linear induction motor system has been adopted for Yongin LRT and currently under construction. This paper covers the contents and technical base for main items of rolling stock, performance standard, carbody structure, bogie, electronic unit and brake equipment in order to implement linear induction motor LRT system according to local conditions.

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