A. Hirota, S. Nagai, M. Al, M. Rukonuzzaman, M. Nakaoka
With great advance of power semiconductor switching devices and their related control circuits, high frequency switching power converters can be implemented for power electronic appliances. In these converters, a pulse width modulation (PWM) technique is widely used. On the other hand, to improve power factor in utility AC side of converter a variety of power factor correction (PFC) converters are effectively introduced. For these converters, hysteresis current control method is developed and applying. Usually, this control scheme uses reference sinusoidal wave and upper limit signal which is determined by added constant value to reference signal, as well as lower limit signal which is determined by subtracted constant value from the reference signal. Using these signals, hysteresis current control method for PFC converter regulates its input current within the range that is determined by the upper and lower limit. In this paper the authors propose a simple configuration hysteresis controlled PFC converter which can effectively reduce current ratings of switching power device. The proposed PFC converter controls input line current keeps within the constant upper limit, specified by the switching power semiconductor device rating, as well as lower limit determined by reference sinusoidal wave. From FFT analytical results, the proposed circuit can lower the current rating of switching power device than fundamental component of input line current.
{"title":"A novel hysteresis current control scheme for single switch type single phase PFC converter","authors":"A. Hirota, S. Nagai, M. Al, M. Rukonuzzaman, M. Nakaoka","doi":"10.1109/PCC.2002.998147","DOIUrl":"https://doi.org/10.1109/PCC.2002.998147","url":null,"abstract":"With great advance of power semiconductor switching devices and their related control circuits, high frequency switching power converters can be implemented for power electronic appliances. In these converters, a pulse width modulation (PWM) technique is widely used. On the other hand, to improve power factor in utility AC side of converter a variety of power factor correction (PFC) converters are effectively introduced. For these converters, hysteresis current control method is developed and applying. Usually, this control scheme uses reference sinusoidal wave and upper limit signal which is determined by added constant value to reference signal, as well as lower limit signal which is determined by subtracted constant value from the reference signal. Using these signals, hysteresis current control method for PFC converter regulates its input current within the range that is determined by the upper and lower limit. In this paper the authors propose a simple configuration hysteresis controlled PFC converter which can effectively reduce current ratings of switching power device. The proposed PFC converter controls input line current keeps within the constant upper limit, specified by the switching power semiconductor device rating, as well as lower limit determined by reference sinusoidal wave. From FFT analytical results, the proposed circuit can lower the current rating of switching power device than fundamental component of input line current.","PeriodicalId":320424,"journal":{"name":"Proceedings of the Power Conversion Conference-Osaka 2002 (Cat. No.02TH8579)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133788986","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}
The three optimized and two carrier-based PWM strategies of the overmodulation region of inverter-fed AC drives are suggested and investigated from the point of view of motor harmonic losses, torque ripples and voltage gain of the control system. The 1/sup st/ optimized solution produces the lowest value of motor harmonic losses if the skin effect in the rotor bar is not significant while the 2/sup nd/ one gives the lowest value of these losses for the strong skin effect. It is shown that the harmonic losses of the optimized and the commonly used carrier based three-phase and two-phase overmodulation strategies ensure acceptable values of harmonic losses even if the skin effect is taken into account but only up to 96% of the maximal possible voltage region. In this case for the presently used switching frequencies the motor harmonic losses rarely exceed the maximal losses of the normal voltage region. The near constant voltage gain can be ensured for the overmodulation region too. The torque ripples of different overmodulation strategies have about the same values.
{"title":"Overmodulation strategies of inverter-fed AC drives","authors":"S. Halász, I. Varjasi, A. Zacharov","doi":"10.1109/PCC.2002.998169","DOIUrl":"https://doi.org/10.1109/PCC.2002.998169","url":null,"abstract":"The three optimized and two carrier-based PWM strategies of the overmodulation region of inverter-fed AC drives are suggested and investigated from the point of view of motor harmonic losses, torque ripples and voltage gain of the control system. The 1/sup st/ optimized solution produces the lowest value of motor harmonic losses if the skin effect in the rotor bar is not significant while the 2/sup nd/ one gives the lowest value of these losses for the strong skin effect. It is shown that the harmonic losses of the optimized and the commonly used carrier based three-phase and two-phase overmodulation strategies ensure acceptable values of harmonic losses even if the skin effect is taken into account but only up to 96% of the maximal possible voltage region. In this case for the presently used switching frequencies the motor harmonic losses rarely exceed the maximal losses of the normal voltage region. The near constant voltage gain can be ensured for the overmodulation region too. The torque ripples of different overmodulation strategies have about the same values.","PeriodicalId":320424,"journal":{"name":"Proceedings of the Power Conversion Conference-Osaka 2002 (Cat. No.02TH8579)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115764898","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}
T. Miyamoto, T. Ishida, K. Matsuse, K. Sasagawa, L. Huang
This paper describes a control strategy for a five-level double converter that consists of the five-level rectifier, the DC link, and the five-level inverter. The purposes of the proposed control strategy are to correct voltage imbalance of the DC link capacitors, to keep the input power factor at near unity, and to achieve adjustable-speed drive. The five-level rectifier is controlled by the instantaneous-value-compared current control method using multi-band hysteresis comparators. On the other hand, the five-level inverter is controlled by the space vector pulse-width modulation method. The validity of the control strategy is verified by experiments using a 3.7 kW induction motor.
{"title":"Control strategy of a three-phase five-level double converter with adjustable DC voltage for induction motor drives","authors":"T. Miyamoto, T. Ishida, K. Matsuse, K. Sasagawa, L. Huang","doi":"10.1109/PCC.2002.997548","DOIUrl":"https://doi.org/10.1109/PCC.2002.997548","url":null,"abstract":"This paper describes a control strategy for a five-level double converter that consists of the five-level rectifier, the DC link, and the five-level inverter. The purposes of the proposed control strategy are to correct voltage imbalance of the DC link capacitors, to keep the input power factor at near unity, and to achieve adjustable-speed drive. The five-level rectifier is controlled by the instantaneous-value-compared current control method using multi-band hysteresis comparators. On the other hand, the five-level inverter is controlled by the space vector pulse-width modulation method. The validity of the control strategy is verified by experiments using a 3.7 kW induction motor.","PeriodicalId":320424,"journal":{"name":"Proceedings of the Power Conversion Conference-Osaka 2002 (Cat. No.02TH8579)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115891061","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}
An electronic gear is designed for short-arc xenon lamps. The electronic gear is composed of an ignitor for generating a high ignition voltage and a DC power supply for providing a DC arc current with low ripple at steady-state. The ignitor employs two stages of step-up circuits with two small sized transformers. To achieve a high power factor, a high-frequency DC-link resonant inverter with a unified resonant energy-tank followed by a rectifier is used as the DC power supply. The electronic gear designed for a short-arc xenon lamp of 350W is discussed as an illustrative example.
{"title":"An electronic gear for short-arc xenon lamps","authors":"T.F. Lin, C. Moo, Y. Hsieh","doi":"10.1109/PCC.2002.998190","DOIUrl":"https://doi.org/10.1109/PCC.2002.998190","url":null,"abstract":"An electronic gear is designed for short-arc xenon lamps. The electronic gear is composed of an ignitor for generating a high ignition voltage and a DC power supply for providing a DC arc current with low ripple at steady-state. The ignitor employs two stages of step-up circuits with two small sized transformers. To achieve a high power factor, a high-frequency DC-link resonant inverter with a unified resonant energy-tank followed by a rectifier is used as the DC power supply. The electronic gear designed for a short-arc xenon lamp of 350W is discussed as an illustrative example.","PeriodicalId":320424,"journal":{"name":"Proceedings of the Power Conversion Conference-Osaka 2002 (Cat. No.02TH8579)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115711659","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}
Xiangning He, Yan Deng, J. Kong, Lei Hu, Zhongqing Yang
This paper presents research and development of the new, composite soft switching techniques for power converters and inverters, where active switches turn on and turn off by different soft switching techniques. The composite soft switching techniques combine snubber functions and resonant zero current switching. Characteristics and applications of the techniques are discussed.
{"title":"Development of the composite soft switching technique for power converters and inverters","authors":"Xiangning He, Yan Deng, J. Kong, Lei Hu, Zhongqing Yang","doi":"10.1109/PCC.2002.998144","DOIUrl":"https://doi.org/10.1109/PCC.2002.998144","url":null,"abstract":"This paper presents research and development of the new, composite soft switching techniques for power converters and inverters, where active switches turn on and turn off by different soft switching techniques. The composite soft switching techniques combine snubber functions and resonant zero current switching. Characteristics and applications of the techniques are discussed.","PeriodicalId":320424,"journal":{"name":"Proceedings of the Power Conversion Conference-Osaka 2002 (Cat. No.02TH8579)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115284805","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}
S. Hase, T. Konishi, A. Okui, Y. Mochinaga, K. Murata, S. Kawai, M. Sonetaka, H. Sakai, T. Kanai, Y. Tagami, M. Ono, K. Baba
A new type DC electric railway system is under development for high speed and mass transportation in Japan. This system needs large power conversion stations consisting of PWM converters on the ground. The PWM converter is required to supply power stably according to the running conditions of the electric rolling stock. In this system, the PWM converter is required to control the DC feeding voltage of 1,500 V at the error rate of 0.5% or less to suppress magnetic disturbance. Moreover the PWM converter has to suppress the oscillating current occurring between the PWM converter and electric rolling stock This paper describes the PWM converter for the DC electric railway system, with emphasis placed on its control methods, characteristics and experimental results.
{"title":"Control methods and characteristics of power converter with large capacity for electric railway system","authors":"S. Hase, T. Konishi, A. Okui, Y. Mochinaga, K. Murata, S. Kawai, M. Sonetaka, H. Sakai, T. Kanai, Y. Tagami, M. Ono, K. Baba","doi":"10.1109/PCC.2002.998115","DOIUrl":"https://doi.org/10.1109/PCC.2002.998115","url":null,"abstract":"A new type DC electric railway system is under development for high speed and mass transportation in Japan. This system needs large power conversion stations consisting of PWM converters on the ground. The PWM converter is required to supply power stably according to the running conditions of the electric rolling stock. In this system, the PWM converter is required to control the DC feeding voltage of 1,500 V at the error rate of 0.5% or less to suppress magnetic disturbance. Moreover the PWM converter has to suppress the oscillating current occurring between the PWM converter and electric rolling stock This paper describes the PWM converter for the DC electric railway system, with emphasis placed on its control methods, characteristics and experimental results.","PeriodicalId":320424,"journal":{"name":"Proceedings of the Power Conversion Conference-Osaka 2002 (Cat. No.02TH8579)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123162347","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}
H. Iyomori, H. Muraoka, A. Okuno, E. Hiraki, M. Nakaoka
This paper presents an innovative prototype of a new electromagnetic induction eddy-current heated type far infrared rays radiant heating appliance using the voltage-fed edge-resonant ZVS-PWM high frequency inverter using IGBTs for food cooking and processing. This soft switching inverter can operate under a constant frequency variable power regulation scheme in order to heat the spiral planar induction heater made of the stainless steel plate. This power electronic appliance with soft switching high frequency inverter using IGBTs has attracted special interest from some advantageous viewpoints of safety, cleanliness, compactness and rapid temperature response, which is more suitable for consumer power electronics applications.
{"title":"Electromagnetic induction eddy current-based far infrared rays radiant heater using soft switching PWM inverter with duty cycle control scheme","authors":"H. Iyomori, H. Muraoka, A. Okuno, E. Hiraki, M. Nakaoka","doi":"10.1109/PCC.2002.998198","DOIUrl":"https://doi.org/10.1109/PCC.2002.998198","url":null,"abstract":"This paper presents an innovative prototype of a new electromagnetic induction eddy-current heated type far infrared rays radiant heating appliance using the voltage-fed edge-resonant ZVS-PWM high frequency inverter using IGBTs for food cooking and processing. This soft switching inverter can operate under a constant frequency variable power regulation scheme in order to heat the spiral planar induction heater made of the stainless steel plate. This power electronic appliance with soft switching high frequency inverter using IGBTs has attracted special interest from some advantageous viewpoints of safety, cleanliness, compactness and rapid temperature response, which is more suitable for consumer power electronics applications.","PeriodicalId":320424,"journal":{"name":"Proceedings of the Power Conversion Conference-Osaka 2002 (Cat. No.02TH8579)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123716047","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}
This paper proposes a new switching pattern generating algorithm based on SVM (space vector modulation) technique for a high-frequency link soft-switching converter. Because of its totally soft-switched operation, isolated output stage and bidirectional power flow, the proposed converter system is suited for interfacing a new energy system, such as a PV (photovoltaic) system having a battery, with AC system line. The restriction of output vector transition in applying SVM technique is discussed first. Then, a suitable pattern which satisfies soft-switching operation is proposed. The validity of the proposed scheme has been proved with simulation study using PSIM and experimental results with DSP based prototype system.
{"title":"New space vector modulation scheme based high-frequency link soft-switching converter for AC system line interface","authors":"M. Matsui, T. Kitano, S. Ohba, D. Xu","doi":"10.1109/PCC.2002.997565","DOIUrl":"https://doi.org/10.1109/PCC.2002.997565","url":null,"abstract":"This paper proposes a new switching pattern generating algorithm based on SVM (space vector modulation) technique for a high-frequency link soft-switching converter. Because of its totally soft-switched operation, isolated output stage and bidirectional power flow, the proposed converter system is suited for interfacing a new energy system, such as a PV (photovoltaic) system having a battery, with AC system line. The restriction of output vector transition in applying SVM technique is discussed first. Then, a suitable pattern which satisfies soft-switching operation is proposed. The validity of the proposed scheme has been proved with simulation study using PSIM and experimental results with DSP based prototype system.","PeriodicalId":320424,"journal":{"name":"Proceedings of the Power Conversion Conference-Osaka 2002 (Cat. No.02TH8579)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125341232","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}
Hyung-Min Ryu, Sung-Jun Kim, S. Sul, T. Kwon, Ki-Su Kim, Young-Seok Shim, Ki-Riong Seok
This paper describes the load simulator for a high-speed elevator, which can emulate a 3-mass system as well as the equivalent 1-mass system. In order to implement the equivalent inertia of the entire elevator system, the conventional simulators have generally utilized mechanical inertia (flywheel) with large radius, which makes the entire system large and heavy. In addition, the mechanical inertia should be replaced each time in order to test another elevator system. In this paper, the dynamic load simulation methods using electrical inertia are presented so that the volume and weight of the simulator system are greatly reduced and the adjustment of inertia value can be achieved easily by software. Experimental results show the feasibility of this simulator system.
{"title":"Dynamic load simulator for high-speed elevator system","authors":"Hyung-Min Ryu, Sung-Jun Kim, S. Sul, T. Kwon, Ki-Su Kim, Young-Seok Shim, Ki-Riong Seok","doi":"10.1109/PCC.2002.997638","DOIUrl":"https://doi.org/10.1109/PCC.2002.997638","url":null,"abstract":"This paper describes the load simulator for a high-speed elevator, which can emulate a 3-mass system as well as the equivalent 1-mass system. In order to implement the equivalent inertia of the entire elevator system, the conventional simulators have generally utilized mechanical inertia (flywheel) with large radius, which makes the entire system large and heavy. In addition, the mechanical inertia should be replaced each time in order to test another elevator system. In this paper, the dynamic load simulation methods using electrical inertia are presented so that the volume and weight of the simulator system are greatly reduced and the adjustment of inertia value can be achieved easily by software. Experimental results show the feasibility of this simulator system.","PeriodicalId":320424,"journal":{"name":"Proceedings of the Power Conversion Conference-Osaka 2002 (Cat. No.02TH8579)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130100375","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}
This paper is aimed at studying a high frequency model for a low voltage random-wound induction motor. In the simulation techniques, a time domain model is proposed based on Foster's reactance from the network synthesis theory so that the frequency dependent impedance of the motor can be obtained. The AC resistance of the winding is modelled to achieve the skin effect at high frequencies. Frequency responses of the impedance of the motor winding are shown. It is shown that the computer model gives highly satisfactory results compared with those from measurements.
{"title":"A frequency dependent model for induction motor using network synthesis theory","authors":"A. Kunakorn","doi":"10.1109/PCC.2002.998109","DOIUrl":"https://doi.org/10.1109/PCC.2002.998109","url":null,"abstract":"This paper is aimed at studying a high frequency model for a low voltage random-wound induction motor. In the simulation techniques, a time domain model is proposed based on Foster's reactance from the network synthesis theory so that the frequency dependent impedance of the motor can be obtained. The AC resistance of the winding is modelled to achieve the skin effect at high frequencies. Frequency responses of the impedance of the motor winding are shown. It is shown that the computer model gives highly satisfactory results compared with those from measurements.","PeriodicalId":320424,"journal":{"name":"Proceedings of the Power Conversion Conference-Osaka 2002 (Cat. No.02TH8579)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124588637","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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