Pub Date : 1996-06-23DOI: 10.1109/PESC.1996.548668
S. Buso
This paper proposes the structured singular value (/spl mu/) approach to the problem of designing an output voltage regulator for a buck-boost power converter with current mode control. This approach allows a quantitative description of the effects of reactive component tolerances and operating point variations, which strongly affect the power converter dynamics. At first, a suitable linear power converter model is derived, whose parameter variations are described in terms of perturbations of the linear fractional transformation (LFT) class. Then, /spl mu/-analysis is used to evaluate the robustness of a conventional PI voltage regulator with respect to the modeled perturbations. Finally, the approximated /spl mu/-synthesis procedure, known as D-K iteration, is used to design a regulator ensuring robust performance. Simulated results are presented, describing the small and large signal behaviour of a reduced-order approximation of the /spl mu/-synthesised controller.
{"title":"/spl mu/-synthesis of a robust voltage controller for a Buck-Boost converter","authors":"S. Buso","doi":"10.1109/PESC.1996.548668","DOIUrl":"https://doi.org/10.1109/PESC.1996.548668","url":null,"abstract":"This paper proposes the structured singular value (/spl mu/) approach to the problem of designing an output voltage regulator for a buck-boost power converter with current mode control. This approach allows a quantitative description of the effects of reactive component tolerances and operating point variations, which strongly affect the power converter dynamics. At first, a suitable linear power converter model is derived, whose parameter variations are described in terms of perturbations of the linear fractional transformation (LFT) class. Then, /spl mu/-analysis is used to evaluate the robustness of a conventional PI voltage regulator with respect to the modeled perturbations. Finally, the approximated /spl mu/-synthesis procedure, known as D-K iteration, is used to design a regulator ensuring robust performance. Simulated results are presented, describing the small and large signal behaviour of a reduced-order approximation of the /spl mu/-synthesised controller.","PeriodicalId":19979,"journal":{"name":"PESC Record. 27th Annual IEEE Power Electronics Specialists Conference","volume":"78 1","pages":"766-772 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1996-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75525573","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 : 1996-06-23DOI: 10.1109/PESC.1996.548758
N. Femia
A new method for finding the topology entered by switching power converters after forced commutation is presented in this paper. Using the compensation theorem, a master-slave connection matrix is defined, whose entries give the current variations caused in each switch by the forced commutation of any switch in the circuit. The method permits capture of the switch states which is consistent with any network state imposed by sources and reactive elements. Some applications to the analysis of power electronic circuits are proposed to outline the effectiveness of this method.
{"title":"A fast method to find the state of switches after forced commutations in switching converters","authors":"N. Femia","doi":"10.1109/PESC.1996.548758","DOIUrl":"https://doi.org/10.1109/PESC.1996.548758","url":null,"abstract":"A new method for finding the topology entered by switching power converters after forced commutation is presented in this paper. Using the compensation theorem, a master-slave connection matrix is defined, whose entries give the current variations caused in each switch by the forced commutation of any switch in the circuit. The method permits capture of the switch states which is consistent with any network state imposed by sources and reactive elements. Some applications to the analysis of power electronic circuits are proposed to outline the effectiveness of this method.","PeriodicalId":19979,"journal":{"name":"PESC Record. 27th Annual IEEE Power Electronics Specialists Conference","volume":"117 1","pages":"1356-1362 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1996-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75689431","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 : 1996-06-23DOI: 10.1109/PESC.1996.548833
A. Khan, P. Kornetzky, K. Kayyali, K. Siri, I. Batarseh
In this paper, the authors present a simplified steady state analysis and design for a DC-to-AC inverter with zero-voltage-switching (ZVS) and output isolation. It is a current-fed power converter having variable frequency control to obtain a symmetrical regulated AC output. Two switches operating in complementary fashion to control the operation of the converter and provide transformer core resetting. The resonance between the parasitic capacitances, transformer magnetizing inductance, and output side inductor allow ZVS for both switches, hence, reducing switching losses. The output has an LCC resonant tank circuit which controls the output power flow, and sets the frequency of the output AC voltage. Using simplified steady-state analysis, input and output characteristic curves are derived for different transformer ratios. Based on these curves, a design procedure with a specific example supported by simulation results is presented.
{"title":"Analysis and design of a zero voltage switching DC-to-AC inverter","authors":"A. Khan, P. Kornetzky, K. Kayyali, K. Siri, I. Batarseh","doi":"10.1109/PESC.1996.548833","DOIUrl":"https://doi.org/10.1109/PESC.1996.548833","url":null,"abstract":"In this paper, the authors present a simplified steady state analysis and design for a DC-to-AC inverter with zero-voltage-switching (ZVS) and output isolation. It is a current-fed power converter having variable frequency control to obtain a symmetrical regulated AC output. Two switches operating in complementary fashion to control the operation of the converter and provide transformer core resetting. The resonance between the parasitic capacitances, transformer magnetizing inductance, and output side inductor allow ZVS for both switches, hence, reducing switching losses. The output has an LCC resonant tank circuit which controls the output power flow, and sets the frequency of the output AC voltage. Using simplified steady-state analysis, input and output characteristic curves are derived for different transformer ratios. Based on these curves, a design procedure with a specific example supported by simulation results is presented.","PeriodicalId":19979,"journal":{"name":"PESC Record. 27th Annual IEEE Power Electronics Specialists Conference","volume":"78 1","pages":"1850-1858 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1996-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75745564","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 : 1996-06-23DOI: 10.1109/PESC.1996.548847
R. Watson, F. Lee
A new full-bridge, active-clamp boost converter is proposed for single-phase high power PFC applications and applications requiring transformer isolation. The active-clamp network serves to limit bridge switch turn-off voltage overshoot and enable the energy stored in the transformer leakage inductance to be used for zero-voltage switching. PWM phase-shift control of the bridge switches is utilized to obtain zero-current switching for two of the four bridge switches. Simulation results are presented which verify the principle of operation.
{"title":"A soft-switched, full-bridge boost converter employing an active-clamp circuit","authors":"R. Watson, F. Lee","doi":"10.1109/PESC.1996.548847","DOIUrl":"https://doi.org/10.1109/PESC.1996.548847","url":null,"abstract":"A new full-bridge, active-clamp boost converter is proposed for single-phase high power PFC applications and applications requiring transformer isolation. The active-clamp network serves to limit bridge switch turn-off voltage overshoot and enable the energy stored in the transformer leakage inductance to be used for zero-voltage switching. PWM phase-shift control of the bridge switches is utilized to obtain zero-current switching for two of the four bridge switches. Simulation results are presented which verify the principle of operation.","PeriodicalId":19979,"journal":{"name":"PESC Record. 27th Annual IEEE Power Electronics Specialists Conference","volume":"8 1","pages":"1948-1954 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1996-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72796361","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 : 1996-06-23DOI: 10.1109/PESC.1996.548836
V. Blasko
Classical space vector PWM with equal duration of application of zero state vectors V0 and V7 was modified. The time of application of vector V7 (and V0) was made changeable from 0 to 100% over the time T/sub 0/ for their combined application. The ratio of the duration of application of vector V0 vs. V7 can be kept constant or changed on a sample by sample basis with a significant impact on the characteristics of the PWM. Correlation between modified space vector and triangle comparison methods was established. It was proved in the paper that modified space vector PWM (with a classical space vector PWM as a special case) can be implemented as a triangle comparison method with added zero sequence. A new algorithm suitable for implementation of modified space vector method on digital or analog hardware for triangle comparison PWM was proposed. Because the algorithm combines the theory of space vector PWM with ease of implementation of a triangle comparison PWM it was named "hybrid" PWM (HPWM).
{"title":"A hybrid PWM strategy combining modified space vector and triangle comparison methods","authors":"V. Blasko","doi":"10.1109/PESC.1996.548836","DOIUrl":"https://doi.org/10.1109/PESC.1996.548836","url":null,"abstract":"Classical space vector PWM with equal duration of application of zero state vectors V0 and V7 was modified. The time of application of vector V7 (and V0) was made changeable from 0 to 100% over the time T/sub 0/ for their combined application. The ratio of the duration of application of vector V0 vs. V7 can be kept constant or changed on a sample by sample basis with a significant impact on the characteristics of the PWM. Correlation between modified space vector and triangle comparison methods was established. It was proved in the paper that modified space vector PWM (with a classical space vector PWM as a special case) can be implemented as a triangle comparison method with added zero sequence. A new algorithm suitable for implementation of modified space vector method on digital or analog hardware for triangle comparison PWM was proposed. Because the algorithm combines the theory of space vector PWM with ease of implementation of a triangle comparison PWM it was named \"hybrid\" PWM (HPWM).","PeriodicalId":19979,"journal":{"name":"PESC Record. 27th Annual IEEE Power Electronics Specialists Conference","volume":"193 1","pages":"1872-1878 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1996-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74614332","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 : 1996-06-23DOI: 10.1109/PESC.1996.550111
F. Klotz, J. Petzoldt, H. Volker
Power switches with high dv/dt and di/dt rates like IGBTs are the source of EMI. The paper presents investigations of conducted EMI on IGBTs in different test circuits. Moreover, results are explained from a special developed model for prediction of common and differential mode interferences, that is suitable to determine solutions for a better EMC through other design around the semiconductor chip. Results and further possibilities are discussed.
{"title":"Experimental and simulative investigations of conducted EMI performance of IGBTs for 5-10 kVA converters","authors":"F. Klotz, J. Petzoldt, H. Volker","doi":"10.1109/PESC.1996.550111","DOIUrl":"https://doi.org/10.1109/PESC.1996.550111","url":null,"abstract":"Power switches with high dv/dt and di/dt rates like IGBTs are the source of EMI. The paper presents investigations of conducted EMI on IGBTs in different test circuits. Moreover, results are explained from a special developed model for prediction of common and differential mode interferences, that is suitable to determine solutions for a better EMC through other design around the semiconductor chip. Results and further possibilities are discussed.","PeriodicalId":19979,"journal":{"name":"PESC Record. 27th Annual IEEE Power Electronics Specialists Conference","volume":"2010 335","pages":"1986-1991 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1996-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72582914","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 : 1996-06-23DOI: 10.1109/PESC.1996.548689
P. Chevrel, L. Sicot, S. Siala
That paper presents a methodic approach based on switched quadratic regulators for designing an efficient DC-motor speed controller. This alternative control strategy is compared with two cascade control design methods in terms of performances, robustness and complexity. Experimental results are given for each controller.
{"title":"Switched LQ controllers for DC motor speed and current control: a comparison with cascade control","authors":"P. Chevrel, L. Sicot, S. Siala","doi":"10.1109/PESC.1996.548689","DOIUrl":"https://doi.org/10.1109/PESC.1996.548689","url":null,"abstract":"That paper presents a methodic approach based on switched quadratic regulators for designing an efficient DC-motor speed controller. This alternative control strategy is compared with two cascade control design methods in terms of performances, robustness and complexity. Experimental results are given for each controller.","PeriodicalId":19979,"journal":{"name":"PESC Record. 27th Annual IEEE Power Electronics Specialists Conference","volume":"44 1","pages":"906-912 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1996-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73861536","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 : 1996-06-23DOI: 10.1109/PESC.1996.548799
J. Antenor Pomilio, C. Pagan
A high-voltage power supply suitable to feed a pulsed laser is developed. The power circuit is a series resonant converter parallel loaded, working at the resonant frequency. The voltage source inverter that feeds the resonant circuit is soft-commutated. The switching frequency is limited to a few kHz by the response of the high-voltage rectifiers. Experimental results on a 1 kV/250 W prototype are presented in order to verify the converter behavior. Design procedure, simulation and results are presented.
{"title":"Resonant high-voltage source working at resonance for pulsed laser","authors":"J. Antenor Pomilio, C. Pagan","doi":"10.1109/PESC.1996.548799","DOIUrl":"https://doi.org/10.1109/PESC.1996.548799","url":null,"abstract":"A high-voltage power supply suitable to feed a pulsed laser is developed. The power circuit is a series resonant converter parallel loaded, working at the resonant frequency. The voltage source inverter that feeds the resonant circuit is soft-commutated. The switching frequency is limited to a few kHz by the response of the high-voltage rectifiers. Experimental results on a 1 kV/250 W prototype are presented in order to verify the converter behavior. Design procedure, simulation and results are presented.","PeriodicalId":19979,"journal":{"name":"PESC Record. 27th Annual IEEE Power Electronics Specialists Conference","volume":"77 1","pages":"1627-1632 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1996-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74020007","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 : 1996-06-23DOI: 10.1109/PESC.1996.548765
P. Steimer, H. Gruning, J. Werninger, D. Schroder
The 100 MVA intertie described is mainly characterised by the following innovations: a hard driven GTO (HD-GTO) with a new housing; series connection of hard driven GTOs; low-inductive high power HD-GTO inverter valves, and fuseless high power HD-GTO inverters. The presented HD-GTO technology allows the robust, reliable and cost-efficient series connection of GTOs. The concept of the 100 MVA intertie, which is based on the HD-GTO technology, is reviewed. The development of the high power HD-GTO inverter module according to a state-of-the-art development process is presented. With the use of a circuit simulator with accurate physical models of the power semiconductors, especially the concept phase, the development phase and the verification phase have been supported.
{"title":"State-of-the-art verification of the hard driven GTO inverter development for a 100 MVA intertie","authors":"P. Steimer, H. Gruning, J. Werninger, D. Schroder","doi":"10.1109/PESC.1996.548765","DOIUrl":"https://doi.org/10.1109/PESC.1996.548765","url":null,"abstract":"The 100 MVA intertie described is mainly characterised by the following innovations: a hard driven GTO (HD-GTO) with a new housing; series connection of hard driven GTOs; low-inductive high power HD-GTO inverter valves, and fuseless high power HD-GTO inverters. The presented HD-GTO technology allows the robust, reliable and cost-efficient series connection of GTOs. The concept of the 100 MVA intertie, which is based on the HD-GTO technology, is reviewed. The development of the high power HD-GTO inverter module according to a state-of-the-art development process is presented. With the use of a circuit simulator with accurate physical models of the power semiconductors, especially the concept phase, the development phase and the verification phase have been supported.","PeriodicalId":19979,"journal":{"name":"PESC Record. 27th Annual IEEE Power Electronics Specialists Conference","volume":"33 1","pages":"1401-1407 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1996-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82169677","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 : 1996-06-23DOI: 10.1109/PESC.1996.548730
Jing Wang, W. Dunford, K. Mauch
A fixed frequency, fixed duty cycle boost converter with continuous input inductor current for unity power factor operation is introduced in this paper. The proposed boost converter has the same "voltage follower" (unity power factor) property as the conventional boost converter operating with discontinuous inductor current mode, but with continuous input inductor current. Thus, the proposed topology has much lower input harmonics and much better EMI performance than the conventional boost converter. By using the coupled inductor technique, the input inductor current ripple can be even dumped into another winding. Ripple free input inductor current is thus achieved. Therefore, the high frequency harmonic distortion can be avoided. The low frequency input current waveform distortion is analyzed. Simulation results are presented and compared with the conventional boost converter operating in discontinuous conduction mode. Compared to the well known Cuk and Sepic converters, the proposed boost topology has the advantages of lower switch voltage stress, lower switch current stress and lower voltage stress on capacitor C/sub s/. The theoretical prediction is verified experimentally.
{"title":"Input inductor current for unity power factor operation","authors":"Jing Wang, W. Dunford, K. Mauch","doi":"10.1109/PESC.1996.548730","DOIUrl":"https://doi.org/10.1109/PESC.1996.548730","url":null,"abstract":"A fixed frequency, fixed duty cycle boost converter with continuous input inductor current for unity power factor operation is introduced in this paper. The proposed boost converter has the same \"voltage follower\" (unity power factor) property as the conventional boost converter operating with discontinuous inductor current mode, but with continuous input inductor current. Thus, the proposed topology has much lower input harmonics and much better EMI performance than the conventional boost converter. By using the coupled inductor technique, the input inductor current ripple can be even dumped into another winding. Ripple free input inductor current is thus achieved. Therefore, the high frequency harmonic distortion can be avoided. The low frequency input current waveform distortion is analyzed. Simulation results are presented and compared with the conventional boost converter operating in discontinuous conduction mode. Compared to the well known Cuk and Sepic converters, the proposed boost topology has the advantages of lower switch voltage stress, lower switch current stress and lower voltage stress on capacitor C/sub s/. The theoretical prediction is verified experimentally.","PeriodicalId":19979,"journal":{"name":"PESC Record. 27th Annual IEEE Power Electronics Specialists Conference","volume":"39 1","pages":"1177-1183 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1996-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79575206","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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