KMITL

Permanent URI for this communityhttps://dspace.kmitl.ac.th/handle/123456789/1

Browse

Settings

Subject: search.filters.subject.AC motor drive

Search Results

Now showing 1 - 5 of 5
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Item,
    Modeling and optimizing a passive EMI filter to attenuate common-mode currents at high frequency in a three-phase adjustable-speed AC motor drive
    (2012-10-01)
    Jettanasen, Chaiyan
    This paper proposes a novel optimization approach of a passive electromagnetic interference (EMI) filter using two-port network technique to reduce or minimize common-mode (CM) conducted noise emissions in a three-phase adjustable-speed AC motor drive. This parasitic current is generally generated by a Pulse Width Modulation (PWM) inverter, an essential part in adjustable-speed AC motor drive systems widely used in many industrial and/or avionic applications, and causes severe EMI problems, in particular at high frequencies (HF); this restricts power electronic drive's evolution. The proposed EMI filter is designed by optimizing its elements values by taking into account real impedances of each part of the considered system,. This approach is contrary to commercial EMI filters typically designed by considering internal impedance of disturbance source and load, equal to 50 Ω/50 Ω, 0.1 Ω/100 Ω or 100 Ω/0.1 Ω. These do not represent the real impedances of the system; thus employing the latter EMI filter would make EMI minimization less effective. The efficiency of the proposed optimization method will be confirmed by comparing the minimized CM current spectra, in frequency domain, to an applied normative level such as EN55011 or DO-160D standards. © ICIC International 2012.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Item,
    Optimization of EMI filter located at the PWM inverter output to reduce parasitic high-frequency currents in AC motor windings
    (2011-04-01)
    Jettanasen, Chaiyan
    Parasitic high-frequency currents in inverter-fed electrical machines are mainly caused by the common-mode voltage with high frequency (HF) and high dv/dt. This will cause severe electromagnetic interference (EMI) problems. Several techniques can be used to reduce these problems. A classical technique is insertion of a passive EMI filter in the system. The design of this filter is usually a "mismatch" type by considering internal impedance of disturbance source and load, equal to 50?; this does not correspond to real impedances of a considered system. The EMI reduction would be less effective. This paper proposes therefore an approach to optimize a low-pass EMI filter adapted to the considered system by using two-port network approach, which is based on real parasitic impedances of the system. This EMI filter optimization is principally dedicated to diminish common mode (CM) high-frequency currents in AC motor windings due to their dominant effects. The efficiency of the proposed optimization approach is deduced by comparing the minimized CM current spectra to an applied normative level such as DO-160D (standard used in aeronautics). ICIC International © 2011 ISSN 1881-803X.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Item,
    Reduction of common-mode conducted noise emissions in PWM inverter-fed AC motor drive systems using optimized passive EMI filter
    (2010-12-13)
    Jettanasen, C.
    ;
    Ngaopitakkul, A.
    Conducted electromagnetic interference (EMI) generated by PWM inverter-fed induction motor drive systems, which are currently widely used in many industrial and/or avionic applications, causes severe parasitic current problems, especially at high frequencies (HF). These restrict power electronic drive's evolution. In order to reduce or minimize these EMI problems, several techniques can be applied. In this paper, insertion of an optimized passive EMI filter is proposed. This filter is optimized by taking into account real impedances of each part of a considered AC motor drive system contrarily to commercial EMI filters designed by considering internal impedance of disturbance source and load, equal to 50Ω. Employing the latter EMI filter would make EMI minimization less effective. The proposed EMI filter optimization is mainly dedicated to minimize common mode (CM) currents due to its most dominant effects in this kind of system. The efficiency of the proposed optimization method using two-port network approach is deduced by comparing the minimized CM current spectra to an applied normative level (ex. DO-160D in aeronautics). © 2010 American Institute of Physics.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Item,
    Passive common-mode EMI filter adapted to an adjustable-speed AC motor drive
    (2010-12-01)
    Jettanasen, Chaiyan
    Electromagnetic interference (EMI) is an unavoidable phenomenon occurred in electrical/electronic systems. A PWM inverter; an essential element in adjustable-speed AC motor drive systems, which are widely used in many industrial and/or avionic applications, is a main source to generate conducted noise emissions, especially the common mode (CM). This causes severe parasitic current problems, especially at high frequencies (HF). These restrict power electronic drive's evolution. To minimize or eliminate this kind of problems, many techniques have been studied and applied. In this paper, insertion of a passive common-mode EMI filter is proposed. This filter is designed by optimizing its elements values by taking into account real impedances of each part of a considered AC motor drive system. This technique is contrarily to commercial EMI filters generally designed by considering internal impedance of disturbance source and load, equal to 50Ω/50Ω, 0.1Ω/100Ω or 100Ω/0.1Ω. These do not represent the real impedances of the considered system, thus employing the latter EMI filter would make EMI minimization less effective. The proposed EMI filter will be optimized to mainly reduce CM currents owing to its most dominant effects in this kind of system. The efficiency of the proposed optimization method using two-port network approach will be deduced by comparing the minimized CM current spectra, in frequency domain, to an applied normative level such as EN55011, DO-160D. ©2010 IEEE.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Item,
    Minimization of common-mode conducted noise in PWM inverter-fed AC motor drive systems using optimized passive EMI filter
    (2010-12-01)
    Jettanasen, C.
    ;
    Ngaopitakkul, A.
    Conducted electromagnetic interference (EMI) generated by PWM inverter-fed induction motor drive systems, which are currently widely used in many industrial and/or avionic applications, causes severe parasitic current problems, especially at high frequencies (HF). These restrict power electronic drive's evolution. In order to reduce or minimize these problems, several techniques can be applied. In this paper, insertion of an optimized passive EMI filter is proposed. This filter is optimized by taking into account real impedances of each part of a considered AC motor drive system contrarily to commercial EMI filters designed by considering internal impedance of disturbance source and load, equal to 50Ω. Employing the latter EMI filter would make EMI minimization less effective. The proposed EMI filter optimization is mainly dedicated to minimize common mode (CM) currents due to its most dominant effects in this kind of system. The efficiency of the proposed optimization method using two-port network approach is deduced by comparing the minimized CM current spectra to an applied normative level (ex. DO-160D in aeronautics).