• Title, Summary, Keyword: commutation action

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Vibration and Acoustic Noise characteristic on SRM with compensating winding that two stage commutation is used at commutation action (2단계 소호전압방식을 적용한 보상권선형 SRM의 진동.소음특성)

  • Lee, Jong-Gun;Jung, Tae-Uk;An, Young-Joo;Hwang, Young-Moon
    • Proceedings of the KIEE Conference
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    • pp.55-57
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    • 1999
  • SRM Drives generate large vibration and acoustic noise because it is rotated by step pulse mmf and switching commutation mechanism. The main vibration source of SRM Drive is generated by rapidly variation of radial force when phase winding current is extinguished for commutation action. So the rapidly variation of radial force is repressed firstly to reduce vibrating force of SRM Drive. This paper suggests the vibration reduction method that SRM Drive with unidirect-short compensation winding is excited by a two stage commutation method at commutation period. This reduction effect of vibration is verified with the result obtained in the test of prototype machine.

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Vibration and Acoustic Noise characteristic on SRM with compensating winding by two stage commutation (2단계 소호전압방식을 적용한 보상권선형 SRM의 진동.소음특성)

  • 오석규;이종근;최태완
    • The Transactions of the Korean Institute of Power Electronics
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    • v.6 no.3
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    • pp.250-257
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    • 2001
  • SRM drives generate large vibration and acoustic noise because it is rotated by step pulse mmf and switching commutation mechanism. The main vibration source of SRM drive is generated by rapidly variation of radial force when phase winding current is extinguished for commutation action. So the rapidly variation of radial force is repressed firstly to reduce vibrating force of SRM drive. This paper suggests an SRM excitation scheme using unidirect-short compensation winding to reduce vibration of the motor. The motor is excited by a two stage commutation method during commutation period. This paper suggests an SRM excitation scheme using unidirect-short compensation winding to reduce vibration of the motor. The motor is excited by a tow stage commutation method during commutation period. This reduction effect of vibration is verified with the result obtained in the test of prototype machine.

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Reduction Characteristics of Vibration and Acoustic Noise of SRM Using Hybrid Excitation Method (하이브리드 여자방식을 이용한 SRM의 진동 소음 저감 특성)

  • Kim, Chang-Seop;O, Seok-Gyu;An, Jin-U
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.50 no.9
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    • pp.438-444
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    • 2001
  • The simple motor construction and low cost, fault tolerant power electronic drive has made the switched reluctance drive a strong contender for many applications. But the switched reluctance drive does exhibit higher levels of vibration and acoustic noise than that of most competing drives. The main source of vibration in the switched reluctance drive is generated by rapid change of radial force when phase current is extinguished during commutation action. In this paper, a hybrid excitation method is proposed to reduce vibration and acoustic noise of the switched reluctance drive. The hybrid excitation has 2-phase excitation by long dwell angle as well as conventional 1-phase excitation. The vibration and acoustic noise are reduced because the scheme reduces abrupt change of excitation level by distributed and balanced excitation.

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A Thyristor Chopper Using Reverse Commutation (역전압 Commutation을 이용한 Thyristor Chopper 에 관한 연구)

  • Park, Sang-Gil;Hong, Bong-Gi;Jang, Ji-Won
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.19 no.1
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    • pp.46-50
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    • 1983
  • A reverse voltage commutating thyristor chopper was described. The chopper consists of commutating capacitor charging circuit and commutating thyristor. By superimposing the charged voltage on capacitor to load voltage. Powerful reverse voltage could be induced on main thyristor cathode. And in that wise the chopping action was performed without all the reactors of the proposed circuit. An energy recovery circuit was employed in the chopper circuit for recovering the energy that was consumed in main thyristor commutation. The operating principles of the chopper circuit was analyzed and experimental results were as following. I) All reactors were eliminated. ii) By applying energy recovery circuit to the chopper, 67% of the consumed energy was recovered to source. iii) Turn off time of the proposed chopper was derived as T=RC ln2.

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Drive Characteristics of 2-Stage Commutated SRM with Auxiliary Winding

  • Lee, Dong-Hee;Ahn, Jin-Woo;Oh, Seok-Gyu;Park, Sung-Jun
    • KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
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    • v.11B no.4
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    • pp.175-179
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    • 2001
  • The switched reluctance drive exhibits higher levels of vibration and acoustic noise than that of most competing drives. The main source of vibration in the switched reluctance drive is generated by rapid change of radial force when phase current is extinguished by commutation action. A new excitation strategy for a Switched Reluctance Motor with Auxiliary Winding (SRMAW) is described and tested. This scheme has auxiliary winding with one diode which is sound to all th poles in one winding. In this scheme, auxiliary winding is used to reduce magnetic stress during commutations. The abrupt change of a phase excitation produces mechanical stresses and it results in vibration and noise. The acoustic noise is reduced remarkably through 2-stage commutation. The operational principle and a characteristic comparison to that of the conventional SRM show that this scheme has some advantages including noise reduction as well as high efficiency drive.

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Universal power converter using High-Speed Switching (고속 스위칭에 의한 만능 전려변화기 구성)

  • Isnanto, Isnanto;Budhi, Prayoga;Choi, Woo-seok;Park, Sung-jun
    • Proceedings of the KIPE Conference
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    • pp.337-338
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    • 2013
  • Combination the several type of single phase power conversion utilized simply topology are proposed in this paper. Totally four kind of converter are investigated, they are Boost AC/AC Converter, Buck AC/AC Converter, Boost AC/DC Converter, and Buck DC/AC Converter. Two types action mode are presented to determine the functional of circuit. First is AC chopper action mode, representation of the AC/AC converter. AC chopper action mode offered the sinusoidal current waveform, better power factor, faster dynamics, and smaller input/output filter. They present high robustness, offer safe commutation and have high efficiency. The second is full bridge action mode, determined the transformation AC to DC power and otherwise. Four switching devices and one magnetic contactor will establish the mode operation of circuit and manage the flow of power proceed in proper. The correction and advance of the kind of converter are verified by simulation.

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Analysis of the Encoder Composite Signal for a Absolute Position Detection of the Synchronous Motor (동기 전동기의 절대 위치 검출을 위한 엔코더 복합 신호의 분석)

  • Joo, Jae-Hun;Kim, Dong-Hyun;Choi, Jung-Keyng
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.15 no.5
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    • pp.1018-1024
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    • 2011
  • For the driving of the sinusoidal type permanent magnet synchronous motor with a maximum continuous torque, the 1200 delayed three phase sinusoidal current inputs which matched with the absolute rotor position are needed at the stator coil. Therefore, the detection of a absolute rotor position is required inevitably. And the right angle relationship between stator magnetic field and rotor magnetic field has to be preserved at a stator by this commutation action. The detection of a absolute position for the commutation can be made generally by the output signal analysis of the encoder attached at a motor shaft. The purposes of this study are to design signal processing logic circuits which could detect the absolute position of motor with a modern encoder system and generate the three reference wave for making sinusoidal current input at a stator coil.

Vibration and Noise Characteristics of SRM with Hybrid Excitation (하이브리드 여자방식 SRM의 진동.소음 저감 특성)

  • Kim, C.S.;Moon, J.W.;Oh, S.G.;Ahn, J.W.;Hwang, Y.M.
    • Proceedings of the KIEE Conference
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    • pp.638-640
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    • 2000
  • The main source of vibration in SRM drive is generated by rapid change of radial force when phase current is extinguished by commutation action. In this paper a hybrid excitation method is proposed to reduce vibration and acoustic noise of SRM. The hybrid excitation has 2-phase excitation by long dwell angle as well as conventional 1-phase excitation. The vibration and acoustic noise are reduced because the scheme reduces abrupt change of excitation level by distributed and balanced excitation.

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Hybrid Excitation Control of SRM Drive for Reduction of Vibration and Acoustic Noise

  • Lee, Dong-Hee;Lee, Sang-Hun;Ahn, Jin-Woo;Park, Sung-Jun
    • KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
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    • v.11B no.4
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    • pp.151-155
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    • 2001
  • The simple motor construction and low cost, fault tolerant power electronic drive has made the switched reluctance drive a strong contender for many applications. But the switched reluctance drive does exhibit higher levels of vibration and acoustic noise than that of most competing drives. The main source of vibration in the switched reluctance drive is generated by rapid change of radial magnetic force when phase current is extinguished during commutation action. In this paper, a hybrid excitation method is proposed to reduce vibration and acoustic noise of the switched reluctance drive. The hybrid excitation has 2-phase excitation by long dwell angle as well as conventional 1-phase excitation. The vibration and acoustic noise are reduced because the scheme reduces abrupt change of excitation level by distributed and balanced excitation.

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Low Noise Characteristics of SRM Drive with Hybrid Excitation (하이브리드 여자방식 SRM의 저소음 구동특성)

  • Kim, C.S.;Oh, S.G.;Ahn, J.W.;Kim, C.W.
    • Proceedings of the KIEE Conference
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    • pp.53-56
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    • 2001
  • The simple construction and low cost, fault tolerant power electronic drive has made the switched reluctance drive a strong contender for many applications. But the switched reluctance drive does exhibit higher levels of vibration and acoustic noise than most competing drives. The main source of vibration in the switched reluctance drive is generated by rapid change of radial force when phase current is extinguished by commutation action. In this paper, a hybrid excitation method is proposed to reduce vibration and acoustic noise of the switched reluctance drive. The hybrid excitation has 2-phase excitation by long dwell angle as well as conventional 1-phase excitation. The vibration and acoustic noise are reduced because the scheme reduces abrupt change of excitation level by distributed and balanced excitation.

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