• Title, Summary, Keyword: Single Phase Switched Reluctance Motors

Search Result 7, Processing Time 0.03 seconds

Characteristic Analysis and Design of a Single Phase Switched Reluctance Motor for High Speed Application

  • Kim, Youn-Hyun
    • KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
    • /
    • v.4B no.3
    • /
    • pp.114-121
    • /
    • 2004
  • Switched reluctance motors have received much attention as a driving means for various industrial applications because they have simple construction, low cost and high efficiency. Nevertheless, the requirements of drive converters make it difficult to lower the overall system cost as compared with the DC motor application. Single phase switched reluctance motors (SPSRMs) provide a solution to the high cost problem since the number of switching power devices can be reduced and consequently the trials for application are increased. However, research involving SPSRMs, especially in the area of design work, is insufficient. This paper introduces a novel design methodology of single phase SRM. The design work for SPSRM comprises the determination of many variables such as stator and rotor pole arc as well as on, off and so on. Managing all variable combinations leads to lengthy computation time and a fault in the design process. For that reason, a reliable technique and brief procedure term are required in SPSRM design.

Sensorless Control of a Single-Phase Switched Reluctance Motor Using Residual Flux

  • Yang, Hyong-Yeol;Shin, Duck-Shick;Lim, Young-Cheol
    • Journal of Power Electronics
    • /
    • v.9 no.6
    • /
    • pp.911-918
    • /
    • 2009
  • This paper presents a new sensorless control method for single-phase switched reluctance motors using induced electromotive force (EMF) due to the residual flux both on the stator and the rotor during phase commutation. The induced EMF falls to zero when the rotor pole moves away from the overlap with the stator pole. By detecting this instant, the speed and position of the rotor can be simply estimated. This method is very simple to implement and it is insensitive to variations in the system parameters as it does not require any stored magnetic data or offline inductance measurements but requires only measurements of the terminal voltage and a simple analog circuit. The proposed method is implemented on a 6/6 single-phase switched reluctance motor. However, it can also be implemented on a multiphase SRM regardless of the size, operation speed and switching mode of the motor hence making the proposed method viable to many applications. Simulation and experimental verification is provided to demonstrate the feasibility of the proposed method.

Drive of Single-phase Switched Reluctance Motors Using Search Coils (서치코일을 이용한 단상 SRM의 구동)

  • Shin, D.S.;Yang, H.Y.;Lim, Y.C.
    • Proceedings of the KIPE Conference
    • /
    • /
    • pp.750-753
    • /
    • 2005
  • This paper presents a method of detecting rotor position for single phase Switched Reluctance Motors(SRMs) using searchs coil. In the single phase SRM, mainly Hall effect sensors or photo interrupters have been used to detect the rotor position. But these sensors cause high cost and increase the volume of the motor, Furthermore when the motor is used in very hostile environment like high temperature or pressure, its reliability goes down. In this paper, low cost and robust characteristics of rotor position detection method are focused in order to compensate for disadvantage of existing sensors. Search coils wound around the stator pole are used for detection of the rotor position in single phase SRM. Rotor position detection is achieved through electromotive force patterns induced by time-varying flux linkage in the search coil. The validity of the method is verified by experimental results.

  • PDF

Steady State and Transient Analysis of Switched Reluctance Motor Drive Fed from a Controlled AC-DC Rectifier

  • Moussa, Mona Fouad
    • Journal of Electrical Engineering and Technology
    • /
    • v.12 no.4
    • /
    • pp.1495-1502
    • /
    • 2017
  • The Theory of operation of switched reluctance motors (SRM) depends on the reluctance torque, where energy is transferred to stator winding only. Although its construction is simple, the electrical design is complex, due to the switching configuration needed to deliver power to stator coils. However, because of the nonlinearly of magnetic circuit, SRM has torque ripple. This paper proposes a new strategy to drive SRM from a single-phase AC supply. Each stator winding is connected to AC-DC or AC-AC converters, which is called branch. All branches are connected in parallel to a single-phase AC supply. A shaft encoder allows current production in stator winding during the positive torque production region and terminates it during the negative torque production region. A magnetic flux is produced between stator poles when current is supplied from AC supply to stator coil and repeats many cycles as long as the rate of change of stator inductance is positive. Different possibilities for the configurations of AC-AC or AC-DC converters are introduced to drive SRM from the single-phase AC supply. A case study is presented for a SRM fed from AC supply through semi-controlled AC-DC converter is presented. A simulation model is introduced and verified by experimental rig for two-phase SRM.

Harmonic Intensity Reduction Technique for Single Phase Switched Reluctance Motor Drives Using a New Random PWM Scheme

  • Nguyen, Minh-Khai;Jung, Young-Gook;Yang, Hyong-Yeol;Lim, Young-Cheol
    • Journal of Power Electronics
    • /
    • v.10 no.1
    • /
    • pp.51-57
    • /
    • 2010
  • This paper proposes a new random switching strategy using a DSP TMS320F2812 to reduce the harmonics spectra of single phase switched reluctance motors. The proposed method combines the random turn-on/off angle technique and the random pulse width modulation technique. A harmonic spread factor (HSF) is used to evaluate the random modulation scheme. In order to confirm the effectiveness of the proposed method an experiment was conducted. The experimental results show that the harmonic intensity of the output voltage for the proposed method is better than that for conventional methods.

Rotor Position Detection and Drive of a Single Phase Switched Reluctance Motor Using a Search Coil (서치코일을 이용한 단상 스위치드 릴럭턴스 모터의 회전자 위치검출 및 구동)

  • Yang Hyong-Yeol;Lim Young-Cheol;Kim Kwang-Heon;Cha Deuk-Keun;Shin Duck-Shick
    • The Transactions of the Korean Institute of Power Electronics
    • /
    • v.10 no.5
    • /
    • pp.488-493
    • /
    • 2005
  • This paper presents a method of detecting rotor position for single phase Switched Reluctance Motors(SRMs) using a search coil. In the single phase SRM, mainly Hall effect sensors or photo interrupters have been used to detect the rotor position. But these sensors have many disadvantages. In this paper, low cost and robust characteristics of rotor position detection method are focused in order to compensate for disadvantage of existing sensors. Search coils wound around the stator pole are used for detection of the rotor position in single phase SRM. Rotor position detection is achieved through electromotive force patterns induced by time-varying flux linkage in the search coil. The simulation and experimental results are presented to verify the performance of the proposed method in this paper.

Single Phase Switched Reluctance Motor for Vacuum Cleaner (진공청소기용 단상 스위치드 리럭턴스 모터)

  • Lim, Jun-Young;Jung, Yun-Chul;Kim, Sang-Young;Choi, Yong-Won;Kim, Jungn-Chul
    • Proceedings of the KIPE Conference
    • /
    • /
    • pp.247-251
    • /
    • 2001
  • Universal motors are mainly used for vacuum cleaner application. There are a lot of researches on SRM that applys home appliance throughout the world. The manufacturing cost of SRM drive makes it hard to expand its application to home appliance. This paper presents Single Phase SRM for the vacuum cleaner that has advantge in cost and performance over conventional universal motor. This paper proposes new power device driving scheme by using SRM switching characteristic. The driving scheme is very simple and inexpensive. Dwell Time Control method is used for the minimum switching loss of power device. The switching frequency of power device is less than 4.5kHz at 45,000rpm. By use of this scheme, power device based on very small switching losses can be used on SRM drive. Also, the biggest problem in single phase SRM is starting, this paper shows a new starting algorithm with two hall sensors, accelerating and running sensors, respectively. Finally, the proposed Single Phase SRM achieves higher efficiency and long life time compared to universal motor. Its life time is more than 1500 hours. Its life time is extended 4 times than that of conventional motor and its suction power is increased $20\%$ at the same volume of conventional universal motor.

  • PDF