• Title, Summary, Keyword: LSPM

Search Result 39, Processing Time 0.029 seconds

The Design of Rotor Bars of Single-Phase Line-Start Permanent Magnet Motor for Improving Starting Characteristics (단상 유도동기전동기의 기동 특성 개선을 위한 회전자 바 형상 설계)

  • Lee Chul-kyu;Kwon Soon-hyo;Yang Byung-yull;Kwon Byung-il
    • The Transactions of the Korean Institute of Electrical Engineers B
    • /
    • v.54 no.8
    • /
    • pp.370-376
    • /
    • 2005
  • The single-phase induction motor is simple and durable, but the efficiency is low. Therefore, electric motors like HLDC and LSPM(line-start permanent magnet motor) that use the permanent magnet have been studied. The most advantages of single-phase LSPM is having the same stator as the stator of the single-phase induction motor and permanent magnets are just inserted in the squirrel cage rotor of the single-phase induction motor. But the characteristics of single-phase LSPM synchronous motor has very complex characteristics until the synchronization and if the design is not suitable, the single-phase LSPM synchronous motor cannot be synchronized. We designed a single-phase LSPM using the same stator and winding as the conventional single-phase induction motor, but newly designed the permanent magnets considering air gap magnetic flux density. The transient characteristics of the single-phase LSPM is not good because of a magnetic breaking torque, however, it can be improved by redesigning the rotor bars. We are proposed the design method of rotor bar for the single-phase LSPM to start softly and to make synchronization easily.

Design of Single-Phase Line-Start Permanent Magnet Motor Using Equivalent Circuit Method

  • Kwon, Sun-Hyo;Lee, Chul-Kyu;Kwon, Byung-Il
    • Journal of Electrical Engineering and Technology
    • /
    • v.1 no.4
    • /
    • pp.490-495
    • /
    • 2006
  • In this research, the design procedure and the design method of a single-phase line-start permanent magnet motor (LSPM) are proposed. In the design procedure, the permanent magnet is designed first and the windings and capacitors are designed later. As well, the points of design of each design parameter are explained. In the design of the single-phase LSPM, the equivalent circuit method is combined with the finite element method (FEM) because it has a shorter analysis time than FEM. The 400 watts single-phase LSPM is designed and manufactured. The characteristics of the manufactured single-phase LSPM are analyzed and experimented. From the analysis result and the experiment result, it is verified that the design procedure and the design method of the single-phase LSPM is valid.

Thermal modeling and analysis of single phase LSPM (단상 LSPM의 열해석 모델링 및 특성 해석)

  • Ham, Sang-Hwan
    • The Transactions of The Korean Institute of Electrical Engineers
    • /
    • v.64 no.3
    • /
    • pp.411-416
    • /
    • 2015
  • This paper presents the thermal modeling and analysis of Line power Start Permanent magnet Motor (LSPM). Thermal analysis of electrical machines is important because temperatures that are consistently too high will reduce the life time of machines and may lead to serious failure. Coefficients of convection are calculated according to the types of operating conditions. And computational fluid dynamics (CFD) technique is performed in order to predict thermal characteristic. The results are compared to the test results.

A study on the Barrier Design Considering Start performance and Efficiency in Single-phase Line-start Permanent Magnet Motor (기동과 효율을 고려한 단상 LSPM의 베리어 설계에 관한 연구)

  • Kim, Won-Ho;Lee, Ju
    • Proceedings of the KIEE Conference
    • /
    • /
    • pp.19-21
    • /
    • 2008
  • 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, magnet is operated by breaking torque in starting region and alignment torque in driving region. Therefore, we need the design process considering the trade-off relationship. In this paper, we propose the design process of a single-phase LSPM for a high starting torque and efficiency with equivalent circuit and FEM. And we use Taguchi Method for considering tolerance in manufacture. Finally, we compared the LSPM that is designed in this paper and conventional induction motor.

  • PDF

A Study on the Design of Single Phase LSPM Considering the Irreversible Demagnetization of Permanent Magnet (불가역 감자를 고려한 단상 LSPM 설계에 관한 연구)

  • Jung, Dae-Sung;Go, Sung-Chul;Park, Hyun-June;Kwon, Sam-Young;Lee, Hyung-Woo;Lee, Ju
    • The Transactions of The Korean Institute of Electrical Engineers
    • /
    • v.57 no.12
    • /
    • pp.2186-2193
    • /
    • 2008
  • The growth on consideration of energy savings and motor efficiency has caused the LSPM(Line Start Permanent Magnet Motor) to be focused as a substitute for conventional induction motors. A Line start permanent magnet motor able to be driven at synchronous speed is designed based on a single phase induction motor in this paper. The single phase LSPM is identical to the induction motor except a permanent magnet is installed in the rotor. As the permanent magnet influences the characteristics of both transient state and steady state, a design considering both starting and synchronization conditions was used. In this paper, by adopting DOE, a single phase motor has been designed showing high power and smooth start. Also, optimal model is selected by weighting function. And the characteristics demagnetization are analyzed according to the variation of magnet shape. Finally, to verify the design results, a prototype was measured.

Dynamic Characteristic Analysis of a Single-phase Line Start Permanent Magnet Synchronous Motor Considering Non-linear Effects (단상 LSPM 동기전동기의 비선형 효과를 고려한 동특성해석)

  • Yu, Byoung-Hun;Kim, Byung-Taek
    • Proceedings of the KIEE Conference
    • /
    • /
    • pp.67-69
    • /
    • 2009
  • 본 논문에서는 자성재료의 비선형성을 고려한 단상 직입 영구자석형(LSPM) 동기전동기의 기동특성해석을 다룬다. 전동기의 운전상태에 따른 자성재료의 비선형특성을 고려하기 위해 정자장 유한요소법을 이용하여 d축과 q축에 대해 전류변화에 따른 인덕턴스를 추출하였다. 계산된 인덕턴스를 LSPM의 등가회로에 적용하였으며 Runge-Kutta 법을 이용하여 시간차분해석을 수행하였다. 제시된 해석방법으로 계산된 기동특성과 유한요소해석결과를 비교함으로써 비선형의 영향을 고찰 하였다.

  • PDF

Steady-State Analysis of Single Phase LSPM Motor using the Laplace's Transform (Laplace 변환을 이용한 단상 LSPM전동기의 정상상태 기동특성 해석)

  • Choi, Myoung-Hyun;Kim, Byung-Taek
    • Proceedings of the KIEE Conference
    • /
    • /
    • pp.820-821
    • /
    • 2011
  • 본 논문은 단상 line-start permanent- magnet (LSPM) 전동기가 가지는 비동기 운전영역에서 나타나는 다양한 토크성분을 해석적 방법으로 분석한다. 비 동기속도에서의 정상상태 전류를 DQ 등가회로를 이용하여 유도하였으며, 이를 이용하여 유도전류와 제동전류의 주파수를 확인하였다. 마지막으로 시간차분 해석을 이용하여 비동기 운전영역의 특정 속도에 대한 토크와 전류를 분석하였으며, 주파수 변환을 이용하여 각 전류의 주파수 성분을 확인하였다.

  • PDF

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
    • /
    • /
    • pp.300-302
    • /
    • 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.

  • PDF

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
    • /
    • /
    • pp.126-128
    • /
    • 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.

  • PDF

Starting Characteristic Analysis of 2.8kW Single-phase LSPM Motor (단상 2.8kW급 LSPM 모터의 기동특성 해석)

  • Lee, Jeong-Jong;Rhyu, Se-Hyun;Kim, Young-Kyoun;Jung, In-Soung
    • Proceedings of the KIEE Conference
    • /
    • /
    • pp.1067-1068
    • /
    • 2011
  • This paper deals with the method of starting characteristic analysis of a single-phase line-start permanent magnet (LSPM)motor. The starting characteristic such as current, torque and is important in LSPM because of demagnetizing of the permanent magnet. In this paper, the characteristic analysis is performed using finite element method.

  • PDF