Pub Date : 2002-12-10DOI: 10.1109/IAS.2002.1042670
A. van den Bossche, V. Valchev, T. Filchev
The purpose of this paper is to propose new analytical approximations for fringing flux calculations around the air gaps of inductor cores, including multiple gap cases and different symmetrical cases. Existing 3D techniques using finite element analysis are accurate but require a prohibitive amount of simulation time and special software. We propose an improved analytical approximation for fringing permeance calculation for the most usual field patterns. The approach is extended form 2D to 3D giving analytical solutions for corner effects, thus providing a better accuracy of the approximation. The derived fringing coefficients are used to present all symmetrical cases and cases with multiple air gaps. The accuracy of the proposed equations is sufficient for a normal engineering design. The advantages of analytical approximations are the possibility of generating diagrams, of solving the reverse problems and optimizing more complex problems.
{"title":"Improved approximation for fringing permeances in gapped inductors","authors":"A. van den Bossche, V. Valchev, T. Filchev","doi":"10.1109/IAS.2002.1042670","DOIUrl":"https://doi.org/10.1109/IAS.2002.1042670","url":null,"abstract":"The purpose of this paper is to propose new analytical approximations for fringing flux calculations around the air gaps of inductor cores, including multiple gap cases and different symmetrical cases. Existing 3D techniques using finite element analysis are accurate but require a prohibitive amount of simulation time and special software. We propose an improved analytical approximation for fringing permeance calculation for the most usual field patterns. The approach is extended form 2D to 3D giving analytical solutions for corner effects, thus providing a better accuracy of the approximation. The derived fringing coefficients are used to present all symmetrical cases and cases with multiple air gaps. The accuracy of the proposed equations is sufficient for a normal engineering design. The advantages of analytical approximations are the possibility of generating diagrams, of solving the reverse problems and optimizing more complex problems.","PeriodicalId":202482,"journal":{"name":"Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130192004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-12-10DOI: 10.1109/IAS.2002.1043743
L. Mihalache
This paper presents a fully digital control method that can be used for inverters used in 400 Hz aircraft ground power units. The method presents an ideal tracking controller that incorporates the computational delay as well as the quantization effects. It uses an observer for the output current third, fifth and seventh harmonics in order to achieve decoupling between the voltage and current loops thus leading to a low THD content in presence of non-linear loads The implementation of the observer is reduced to IIR filters with normal architecture that have minimum round off errors. The control method is implemented on a 16-bit single chip DSP-based controller from Analog Devices (ADMC401) and tested on a single-phase 10 kVA IGBT-based inverter prototype showing almost complete elimination of the third, fifth and seventh harmonics from the output voltage.
{"title":"DSP control of 400 Hz inverters for aircraft applications","authors":"L. Mihalache","doi":"10.1109/IAS.2002.1043743","DOIUrl":"https://doi.org/10.1109/IAS.2002.1043743","url":null,"abstract":"This paper presents a fully digital control method that can be used for inverters used in 400 Hz aircraft ground power units. The method presents an ideal tracking controller that incorporates the computational delay as well as the quantization effects. It uses an observer for the output current third, fifth and seventh harmonics in order to achieve decoupling between the voltage and current loops thus leading to a low THD content in presence of non-linear loads The implementation of the observer is reduced to IIR filters with normal architecture that have minimum round off errors. The control method is implemented on a 16-bit single chip DSP-based controller from Analog Devices (ADMC401) and tested on a single-phase 10 kVA IGBT-based inverter prototype showing almost complete elimination of the third, fifth and seventh harmonics from the output voltage.","PeriodicalId":202482,"journal":{"name":"Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128250236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-12-10DOI: 10.1109/IAS.2002.1042700
Rong Zheng, Jinliang He, Jun Hu, G. Lu, B. Luo
In China, the grounding system is made of steel. When the steel corrodes, it is a potential problem and very dangerous to the power system, since it is buried under ground. How to obtain the status of the corrosion easily is very important for the safety of the operation. A novel method is proposed, by which corrosion status of grounding system can be diagnosed from measured port resistances among the touchable down-lead conductors connected to the grounding grid. First, the mathematical relationship between the corrosion status of the grounding grid's all grounding conductors and the measured port resistances is deduced in detail based on circuit model and theory. Then, an appropriate mathematical model is discussed for practicable computation. The completed corrosion diagnosis system, including hardware device of data measurement, diagnosis and analysis software, is also introduced concisely. Finally, the field test report is provided to validate the method.
{"title":"The theory and implementation of corrosion diagnosis for grounding system","authors":"Rong Zheng, Jinliang He, Jun Hu, G. Lu, B. Luo","doi":"10.1109/IAS.2002.1042700","DOIUrl":"https://doi.org/10.1109/IAS.2002.1042700","url":null,"abstract":"In China, the grounding system is made of steel. When the steel corrodes, it is a potential problem and very dangerous to the power system, since it is buried under ground. How to obtain the status of the corrosion easily is very important for the safety of the operation. A novel method is proposed, by which corrosion status of grounding system can be diagnosed from measured port resistances among the touchable down-lead conductors connected to the grounding grid. First, the mathematical relationship between the corrosion status of the grounding grid's all grounding conductors and the measured port resistances is deduced in detail based on circuit model and theory. Then, an appropriate mathematical model is discussed for practicable computation. The completed corrosion diagnosis system, including hardware device of data measurement, diagnosis and analysis software, is also introduced concisely. Finally, the field test report is provided to validate the method.","PeriodicalId":202482,"journal":{"name":"Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128713144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-12-10DOI: 10.1109/IAS.2002.1044105
S. Ahmed, M. Haji, H. Toliyat
With the increased use of digital instrumentation in industrial applications, it becomes highly essential for the engineer to become more familiar and aware of the possible sources of measurement error related to the instruments being used and their internal construction. This paper aims to provide a common terminology, and error quantification in such systems. The discussion is aimed at both the user and the manufacturer of such instruments. The main body presents many performance features of modern digital measurement systems and the sources of error. Simple MATLAB/SIMULINK models attempt to simulate digital measurement system components in an intuitive manner. Developing such an understanding will aid in the determination of the required tests and the interpretation of their results. The work is aimed at a better understanding of the nonsinusoidal situation and the measuring problems due to nonsinusoidal conditions. The main part of this work is the development of a solid background using modern simulation tools of one of the main components of the measurement system, namely the data converter, and its requirements and errors. Sample data converter specifications are illustrated based on a sample nonlinear inverter waveform analysis. A new simple low cost topology for a data converter suitable for such an application is also presented and its performance is assessed using simulation. Finally, a comparison between this method and the existing one in TI DSP TMS2407 is made.
{"title":"A system level solution for power electronic measurements","authors":"S. Ahmed, M. Haji, H. Toliyat","doi":"10.1109/IAS.2002.1044105","DOIUrl":"https://doi.org/10.1109/IAS.2002.1044105","url":null,"abstract":"With the increased use of digital instrumentation in industrial applications, it becomes highly essential for the engineer to become more familiar and aware of the possible sources of measurement error related to the instruments being used and their internal construction. This paper aims to provide a common terminology, and error quantification in such systems. The discussion is aimed at both the user and the manufacturer of such instruments. The main body presents many performance features of modern digital measurement systems and the sources of error. Simple MATLAB/SIMULINK models attempt to simulate digital measurement system components in an intuitive manner. Developing such an understanding will aid in the determination of the required tests and the interpretation of their results. The work is aimed at a better understanding of the nonsinusoidal situation and the measuring problems due to nonsinusoidal conditions. The main part of this work is the development of a solid background using modern simulation tools of one of the main components of the measurement system, namely the data converter, and its requirements and errors. Sample data converter specifications are illustrated based on a sample nonlinear inverter waveform analysis. A new simple low cost topology for a data converter suitable for such an application is also presented and its performance is assessed using simulation. Finally, a comparison between this method and the existing one in TI DSP TMS2407 is made.","PeriodicalId":202482,"journal":{"name":"Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128420211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-12-10DOI: 10.1109/IAS.2002.1044103
K. Haeiwa, T. Yamashita, Y. Takeuchi, Y. Toba, S. Torihata, M. Onizawa
An evolutional optical RF-TV signal sensing and transmitting facilities were constructed and employed for a new type of TV relaying station. A LiNbO/sub 3/ optical modulator of Mach-Zehnder type at 1.3 /spl mu/m, which was used to modulate a light beam at 1.3 /spl mu/m with digital terrestrial television (OFDM) signals at a 470 MHz through 770 MHz band with a power level of 36 dB /spl mu/V obtained from a UHF-TV receiving antenna in the receiving facilities, was newly used to send these RF-TV signals to the transmitting facilities located up to 6 km apart from the receiving point. The system operation was satisfactory.
{"title":"Optical RF-TV signal sensing and transmission for terrestrial TV relaying stations","authors":"K. Haeiwa, T. Yamashita, Y. Takeuchi, Y. Toba, S. Torihata, M. Onizawa","doi":"10.1109/IAS.2002.1044103","DOIUrl":"https://doi.org/10.1109/IAS.2002.1044103","url":null,"abstract":"An evolutional optical RF-TV signal sensing and transmitting facilities were constructed and employed for a new type of TV relaying station. A LiNbO/sub 3/ optical modulator of Mach-Zehnder type at 1.3 /spl mu/m, which was used to modulate a light beam at 1.3 /spl mu/m with digital terrestrial television (OFDM) signals at a 470 MHz through 770 MHz band with a power level of 36 dB /spl mu/V obtained from a UHF-TV receiving antenna in the receiving facilities, was newly used to send these RF-TV signals to the transmitting facilities located up to 6 km apart from the receiving point. The system operation was satisfactory.","PeriodicalId":202482,"journal":{"name":"Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344)","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127250439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-12-10DOI: 10.1109/IAS.2002.1043789
Jinghai Zhou, F. Tao, F. Lee, N. Onishi, M. Okawa
A high power density electronic ballast circuit for high intensity discharge (HID) lamp is proposed. Approaches to achieve high power density are studied. Topologically, the zero-voltage-switching quasi-square-wave concept is adopted when developing the high frequency high efficiency DC/DC front-end converter for the ballast based on the semiconductor loss analysis. On the other hand, a PCB level packaging method is proposed to deal with the thermal related issues, which further improves the power density of the system. A prototype is developed, with a maximum efficiency of 93.3% and the power density of 38.7 W/inch/sup 3/.
{"title":"High power density electronic ballast for HID lamps","authors":"Jinghai Zhou, F. Tao, F. Lee, N. Onishi, M. Okawa","doi":"10.1109/IAS.2002.1043789","DOIUrl":"https://doi.org/10.1109/IAS.2002.1043789","url":null,"abstract":"A high power density electronic ballast circuit for high intensity discharge (HID) lamp is proposed. Approaches to achieve high power density are studied. Topologically, the zero-voltage-switching quasi-square-wave concept is adopted when developing the high frequency high efficiency DC/DC front-end converter for the ballast based on the semiconductor loss analysis. On the other hand, a PCB level packaging method is proposed to deal with the thermal related issues, which further improves the power density of the system. A prototype is developed, with a maximum efficiency of 93.3% and the power density of 38.7 W/inch/sup 3/.","PeriodicalId":202482,"journal":{"name":"Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127558604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-12-10DOI: 10.1109/IAS.2002.1042780
Fengxiang Wang, Chengwu Lin, J. Zhu, Longya Xu
A doubly-fed machine adjustable speed system normally needs a bi-directional converter. Not only the control technique is complicated but also the system cost is rather high. In this paper, a chopping and doubly-fed adjusting speed control strategy is proposed based on the variable speed principle of the doubly-fed machine. The circuit topology, fulfilling combined functions of a rectifier, chopper and inverter, is described. The control algorithms in chopping and doubly-fed modes for adjustable speed operation based on the Intel 8XC196MC single-chip-computer are derived. The Experimental results show the feasibility of the proposed scheme. Advantages of using the proposed system include a relatively inexpensive multi-functional converter, soft-starting, adjustable speed operation through chopping and doubly-fed adjustable speed modes below or above synchronous speed with reactive power regulation.
{"title":"A chopping and doubly-fed adjustable speed system without bi-directional converter","authors":"Fengxiang Wang, Chengwu Lin, J. Zhu, Longya Xu","doi":"10.1109/IAS.2002.1042780","DOIUrl":"https://doi.org/10.1109/IAS.2002.1042780","url":null,"abstract":"A doubly-fed machine adjustable speed system normally needs a bi-directional converter. Not only the control technique is complicated but also the system cost is rather high. In this paper, a chopping and doubly-fed adjusting speed control strategy is proposed based on the variable speed principle of the doubly-fed machine. The circuit topology, fulfilling combined functions of a rectifier, chopper and inverter, is described. The control algorithms in chopping and doubly-fed modes for adjustable speed operation based on the Intel 8XC196MC single-chip-computer are derived. The Experimental results show the feasibility of the proposed scheme. Advantages of using the proposed system include a relatively inexpensive multi-functional converter, soft-starting, adjustable speed operation through chopping and doubly-fed adjustable speed modes below or above synchronous speed with reactive power regulation.","PeriodicalId":202482,"journal":{"name":"Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127451764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-12-10DOI: 10.1109/IAS.2002.1043777
K. Shimizu, S. Saeki, G. Yamada, T. Oda
Emission spectrometry in the atmospheric pressure discharge was carried out to understand reaction mechanisms of active species, as the discharge plasma processing is significantly influenced by the gas components. The N/sub 2/ second positive band (SPB), the N/sub 2/ first negative band (FNB) and the NO-/spl gamma/ band were investigated using a digital controlled spectrometer and an ICCD camera. When dielectric pellets were placed between a needle-plate type electrode, these emissions decreased along with the electrode axis. In the positive streamer discharges of needle-plate electrodes, high-energy electrons were mainly produced around the tip of the needle electrode leading to the N/sub 2/ first negative band. When the discharge energy exceeded a certain value, the intensity of the N/sub 2/ first negative band increased, compared to other bands. This is due to the presence of high-energy electrons below the needle electrode and on the dielectric plate. The emission spectrum observation with time resolution allowed us to conclude that the N/sub 2/ second positive band emission and that of N/sub 2/ first negative band emission were extinguished within 200 ns, while that of NO-/spl gamma/ band continued for more than 3 /spl mu/s. This could be due to a difference in the mechanisms of light emission. N/sub 2/ second positive band and N/sub 2/ first negative band were excited by electron collisions, while NO-/spl gamma/ band was energized by collisions of N/sub 2/(A)-state molecules. Distribution of NO molecules in the corona discharge or the barrier discharge was obtained from a decay constant of NO-/spl gamma/ band emission. NO could be decomposed by a reducing reaction at the tip of the needle in the corona discharge. On the contrary, NO could be decomposed by a reducing reaction around the plate electrode in the barrier discharge.
{"title":"Emission spectrometry of NO or activated nitrogen species in non-thermal plasma","authors":"K. Shimizu, S. Saeki, G. Yamada, T. Oda","doi":"10.1109/IAS.2002.1043777","DOIUrl":"https://doi.org/10.1109/IAS.2002.1043777","url":null,"abstract":"Emission spectrometry in the atmospheric pressure discharge was carried out to understand reaction mechanisms of active species, as the discharge plasma processing is significantly influenced by the gas components. The N/sub 2/ second positive band (SPB), the N/sub 2/ first negative band (FNB) and the NO-/spl gamma/ band were investigated using a digital controlled spectrometer and an ICCD camera. When dielectric pellets were placed between a needle-plate type electrode, these emissions decreased along with the electrode axis. In the positive streamer discharges of needle-plate electrodes, high-energy electrons were mainly produced around the tip of the needle electrode leading to the N/sub 2/ first negative band. When the discharge energy exceeded a certain value, the intensity of the N/sub 2/ first negative band increased, compared to other bands. This is due to the presence of high-energy electrons below the needle electrode and on the dielectric plate. The emission spectrum observation with time resolution allowed us to conclude that the N/sub 2/ second positive band emission and that of N/sub 2/ first negative band emission were extinguished within 200 ns, while that of NO-/spl gamma/ band continued for more than 3 /spl mu/s. This could be due to a difference in the mechanisms of light emission. N/sub 2/ second positive band and N/sub 2/ first negative band were excited by electron collisions, while NO-/spl gamma/ band was energized by collisions of N/sub 2/(A)-state molecules. Distribution of NO molecules in the corona discharge or the barrier discharge was obtained from a decay constant of NO-/spl gamma/ band emission. NO could be decomposed by a reducing reaction at the tip of the needle in the corona discharge. On the contrary, NO could be decomposed by a reducing reaction around the plate electrode in the barrier discharge.","PeriodicalId":202482,"journal":{"name":"Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114305430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-12-10DOI: 10.1109/IAS.2002.1043804
S. Halász, A. Zakharov
In the region of high voltage and power, a high quality inverter-fed AC drive is more easily obtained by the use of multi-level inverters. In the first case three-level inverters should be taken into consideration. One of the important quality indexes of the PWM technique is the inverter-fed motor harmonic losses. They can be characterized by the generalized loss-factor. It is shown that for three-level inverters three different PWM regions can be introduced where different PWM strategies should be applied. The paper deals with computations of the generalized loss-factor of three-level inverters in the case of space vector modulation and the comparison of the different PWM methods on the basis of this factor. It is shown that the generalized loss-factors of three-level inverters are 4-35 times lower than those are for two-level inverters.
{"title":"PWM strategies of three-level inverter-fed AC drives","authors":"S. Halász, A. Zakharov","doi":"10.1109/IAS.2002.1043804","DOIUrl":"https://doi.org/10.1109/IAS.2002.1043804","url":null,"abstract":"In the region of high voltage and power, a high quality inverter-fed AC drive is more easily obtained by the use of multi-level inverters. In the first case three-level inverters should be taken into consideration. One of the important quality indexes of the PWM technique is the inverter-fed motor harmonic losses. They can be characterized by the generalized loss-factor. It is shown that for three-level inverters three different PWM regions can be introduced where different PWM strategies should be applied. The paper deals with computations of the generalized loss-factor of three-level inverters in the case of space vector modulation and the comparison of the different PWM methods on the basis of this factor. It is shown that the generalized loss-factors of three-level inverters are 4-35 times lower than those are for two-level inverters.","PeriodicalId":202482,"journal":{"name":"Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114486862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2002-12-10DOI: 10.1109/IAS.2002.1043812
A. Lelkes, J. Krotsch, R. D. De Doncker
An important market for brushless DC (BLDC) motors is fan applications, where low acoustic noise is of increasing importance. External rotor motors are especially advantageous for space-saving fan-motor-units. The acoustic noise of the motor can be influenced considerably through commutation strategy. The commutating process has been analyzed using space vectors. Motor noise has been reduced significantly using new modulation strategies.
{"title":"Low-noise external rotor BLDC motor for fan applications","authors":"A. Lelkes, J. Krotsch, R. D. De Doncker","doi":"10.1109/IAS.2002.1043812","DOIUrl":"https://doi.org/10.1109/IAS.2002.1043812","url":null,"abstract":"An important market for brushless DC (BLDC) motors is fan applications, where low acoustic noise is of increasing importance. External rotor motors are especially advantageous for space-saving fan-motor-units. The acoustic noise of the motor can be influenced considerably through commutation strategy. The commutating process has been analyzed using space vectors. Motor noise has been reduced significantly using new modulation strategies.","PeriodicalId":202482,"journal":{"name":"Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122832438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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