• Title, Summary, Keyword: Single Phase Induction Motor

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A Study on Stabilization of Multi-Excited Induction Motor (다중여자 유도전동기의 안정도에 관한 연구)

  • 강만원;김한성
    • The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.9 no.4
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    • pp.78-85
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    • 1995
  • This paper covers stability and stabilization of Multi-Excited Induction Motor used in numberous electric equipment system of industrial field. The induction motor with multi-excitation has tow sets of three-phase system : One is connected to the AC source to supply most power required at the load, and the other is to the inverter for variable frequency and/or magnitude of voltage. The conventional induction motor is operated under single excitation mode only, that is called induction mode. But in multi-excited induction motor both the induction mode and the synchronous mode are possible, and the proposed multi-excited induction motor can be driven as a synchronous motor by the extra three-phase input. At the synchronous mode the efficiency is improved so higher than that at induction mode or conventional induction motor. The rating of the inverter used for speed control of numberous electric equipment system can be reduced upto one-tenth of that for conventional induction motor. Also the cost and maintenance fee of multi-excited induction motor can be reduced compared to any other motor.

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

  • Kim, Gyu-Heon;Jung, Tae-Uk
    • Journal of the Korean Society of Industry Convergence
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    • v.23 no.3
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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.

A Study on the Characteristic Analysis of Winding Method and Slot Structure for Single Phase Induction Motor (단상유도기의 권선법 및 슬롯 구조에 따른 특성 해석 연구)

  • Hwang, Yo-Han;Kim, Ki-Chan;Won, Sung-Hong;Jung, Dae-Sung;Lee, Ju
    • Proceedings of the KIEE Conference
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    • pp.203-205
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    • 2006
  • This paper presents a study on the winding method and structure of core of single phase induction motor in order to design the high efficiency motor. In case of single phase induction motor, winding fill factor and the number of turns in each slot are not uniform in general. Moreover, these can be the critical parameters for high efficiency design in case the size of motor should be restricted within certain volume. Therefore, we should analyze the effects of these parameters related to efficiency parameter. The characteristic analysis was performed by using FEM.

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Study on Analysis of Single Phase Induction Motor Considering Saturation Factor (포화계수를 고려한 단상 유도전동기의 해석에 관한 연구)

  • Cho, Su-Yeon;Kim, Kwang-Soo;Im, Jong-Bin;Ryu, Gwang-Hyeon;Oh, Se-Young;Ahn, Han-Woong;Lee, Ju
    • Proceedings of the KIEE Conference
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    • pp.846-847
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    • 2011
  • This paper presents the study on analysis of single phase induction motor characteristics by equivalent circuit. For high efficiency of single phase induction motor, the motor parameters used for equivalent circuit analysis is important. The accuracy of equivalent circuit analysis of motor depends on the circuit parameters like saturation factor. Therefore this paper proposed the analysis method considering saturation factor. The saturation factor was calculated by iteration routine and numerical method. this proposed method was verified by FEM analysis results and dynamo test results of the prototype model.

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A Characteristics of Input Parameters for Detecting of Speed-Load of SPIM (단상유도전동기의 속도-부하의 검출을 위한 입력파라미터 특성)

  • Park, Su-Kang;Lim, Yang-Su;Kim, Pyung-Ho;Kim, Dae-Gon;Cho, Geum-Bae;Baek, Hyung-Lae
    • Proceedings of the KIEE Conference
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    • pp.964-966
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    • 2003
  • The three-phase induction motor is rugged, reliable, long-lived, self-starting, smooth-running. But it is relatively inexpensive and three-phase power in not available everywhere, so if possible we need single-phase motor with the same characteristics. In fact, single-phase induction motors have excellent characteristics and outnumber the three-phase variety. Most of the small electric motors used in home, farm, or office are single-phase induction motors of one type or another. This electric motors application field need most energy saving type drive according to enlargement of electronic goods and to tend high class. The paper is proposed a various phase control methods for energy saving of single- phase induction motor. The controllers that are embodied by each method can use by various usage according to each performance and it is considered that application may help in the electrical energy saving because is possible to other electrical appliances.

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Loss Analysis of Three Phase Induction Motor Connected to Single Phase Source (단상전원에 접속된 3상 유도전동기의 손실분석)

  • Kim, Do-Jin;Jwa, Chong-Keun
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.57 no.2
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    • pp.121-126
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    • 2008
  • This paper analyzes the losses of a Steinmetz connection three-phase induction motor which is supplied by a single-phase source. The T-type equivalent circuit which is taken no-load losses into account is used to determine phase converter capacitive reactances at starting and rated speed by using the condition of the minimum voltage unbalance. The starting and the operating capacitor are replaced at the slip of the same voltage unbalance factor points which are depicted using two capacitive reactances. The operation characteristics are investigated by comparing with those of three-phase balanced operation to find the feasibility of single-phase operation. To analyze the losses of this motor, the output power decrease factor(OPDF), the loss ratio(LR), the no load loss ratio(NLLR), the copper loss ratio(CLR), the stator copper loss ratio(SCLR), and the rotor copper loss ratio(RCLR) are defined and simulated in the whole slip range. The simulated results show that OPDF is maintained almost uniformly, LR is low at low speed and high at high speed, CLR is higher !ban NLLR, but CLR varies concavely and NLLR varies convexly at high speed, SCLR is low at low speed and high at high speed, but SCLR varies convexly at high speed, and RCLR is nearly opposite to SCLR.

A Study on the Design and the Characteristics in Single-phase Line-start Permanent Magnet Motor (단상 유도형 동기 전동기의 설계 및 파라미터 고찰)

  • Lee, Jin-Hun;Jung, Dae-Sung;Oh, Se-Young;Go, Sung-Chul;Bae, Jae-Nam;Lee, Ju
    • Proceedings of the KIEE Conference
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    • pp.126-128
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    • 2007
  • The purpose of This paper is the optimal design of a single-phase LSPM(Line-Start Permanent magnet Motor). A single-phase LSPM has a permanent magnet in the rotor that is same as induction motor. For that reason, the transient characteristics are very different from an induction motor Therefore, we need the PM design to consider a transient and steady- state characteristics. In this paper, we designed a single-phase LSPM that has a high power and a good starting characteristics, and analyzed the performance of designed LSPM by varying each parameters. Finally, we examined and compared the simulation results and the prototype motor's characteristics.

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A study on the running characteristics of the single phase induction motor by S.C.R. (S.C.R.에 의한 단상유도전동기의 운전특성에 관해서)

  • Jong Swoo Won
    • 전기의세계
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    • v.17 no.4
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    • pp.7-12
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    • 1968
  • In recent years the development of the SCR has made possible the control of the power system. It is one example that the speed control of the induction motor can be done by changing the frequency with the S.C.R. This paper is devoted primarily to a study of the running characteristics of the single phase induction motor through the experimental and theoretical methods when the speed of the motor is controlled by varying the conduction period in current with S.C.R. under the constant frequency. We conclude from the experiments that the adjustment of the phase angle in current is equivalent to the change of the supply voltage to the motor. Therefore, the speed control of the motor such as a fan duty motor is possibly by this methods.

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

  • Kim, Kang-Won;Ahn, Hyun-Jin;Choi, Jun-Ho;Han, Jae-Hyun;Kim, Eui-Sun;Lim, Young-Cheol
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.29 no.8
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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.

Design of Controller for Reducing In-Rush Current of Single-Phase Induction Motor (단상유도전동기의 돌입전류저감을 위한 제어기 설계)

  • Park, Su-Kang;Baek, Hyung-Lae;Lee, Sang-Il
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.50 no.5
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    • pp.238-245
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    • 2001
  • During an AC motor's start-up accelerating period, a large amount of current is required to reach to the rating speed. This is called in-rush current. This peak in-rush current can be more than about several times the operating or steady-state current in the full load rating of the motor. In-rush current is present in both and electronic ballasts. The main area of concern is the tripping of circuit breaker and fuses which can affect electrical system components From this, we can see that the electrical power controllers will be rather concerned, since they have to supply the actual current necessary to start the motor. This paper presents a new method to reducing in-rush current and energy saving of the single-phase induction motor used in air-conditioner. It can be obtained that proposed system is low cost and small size as compared with other controller. Experiments are focused on a capacitor starting single-phase induction motor. The optimal power saving and in-rush current limiting by phase angle control are verified by experimental results. Also, auxiliary winding was controlled by electronic starting switch.

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