{"title":"Current ripple bounds in interleaved DC-DC power converters","authors":"Chin Chang","doi":"10.1109/PEDS.1995.404978","DOIUrl":"https://doi.org/10.1109/PEDS.1995.404978","url":null,"abstract":"In distributed power supply systems, the parallelism of DC-DC power converters is a basic architecture. In this paper, the authors use the time domain method to show that the amplitude of the input/output current ripple of N(/spl ges/1) parallelly interleaved modules is always upper bounded by that of the individual modules for buck, boost, flyback, Cuk, and SEPIC power converters if the phase shift among the modules is 2/spl pi//N. Efficient numerical algorithms for predicting the net ripple amplitude in interleaved power modules are derived based on the insight gained from the time domain method.<<ETX>>","PeriodicalId":244042,"journal":{"name":"Proceedings of 1995 International Conference on Power Electronics and Drive Systems. PEDS 95","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133688111","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}
{"title":"Direct and indirect flux control of an isolated induction generator","authors":"R. Lyra, S. Silva, P. C. Cortizo","doi":"10.1109/PEDS.1995.404933","DOIUrl":"https://doi.org/10.1109/PEDS.1995.404933","url":null,"abstract":"This work presents an excitation control scheme for an induction generator using a PWM VAr compensator. The operation under variable speed conditions typical in wind drivers, the high performance, supported by the field oriented vector control and the total isolated operation, using a starting-up battery are the main features of this system. The vector control is implemented both in a direct field orientation scheme, using a stator flux observer, and in an indirect scheme, based on the voltage vector. In both methods, a DC voltage controller is used to maintain the necessary DC level in the compensator. The analysis is made by the aid of computer simulation and experimental results obtained from a 2 HP prototype.<<ETX>>","PeriodicalId":244042,"journal":{"name":"Proceedings of 1995 International Conference on Power Electronics and Drive Systems. PEDS 95","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133601645","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}
M. Shoyama, Y. Hamafuku, N. Matsuzaki, T. Ninomiya
{"title":"Simplification of transfer function in switching converter with general load impedance","authors":"M. Shoyama, Y. Hamafuku, N. Matsuzaki, T. Ninomiya","doi":"10.1109/PEDS.1995.404930","DOIUrl":"https://doi.org/10.1109/PEDS.1995.404930","url":null,"abstract":"Conventionally the small-signal characteristics of switching DC-DC converters have usually been analyzed on the assumption that the load is a pure resistance mainly for analytical simplicity. However, in many cases an actual load is not necessarily a pure resistance. This paper presents a simplified transfer function of duty ratio to output voltage of the forward switching converter with a general load impedance by introducing some assumptions which are usually satisfied. The validity of the simplified transfer function is confirmed by comparing computer-calculated results with experimental data. This approach is applied to some other switching converter topologies.<<ETX>>","PeriodicalId":244042,"journal":{"name":"Proceedings of 1995 International Conference on Power Electronics and Drive Systems. PEDS 95","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133270323","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}
{"title":"Fully digital control of PMSM servo drive using DSP","authors":"Z. Xue, Li Yongdong, Y. Tong","doi":"10.1109/PEDS.1995.404907","DOIUrl":"https://doi.org/10.1109/PEDS.1995.404907","url":null,"abstract":"This paper presents a fully digital control of a PMSM (permanent magnet synchronous motor) servo drive based on dual-CPUs, one CPU is an INTEL 8098 used for monitoring and feedback control of speed, another is digital signal processor TMS320C25, which can implement the precise current control by software. A current predicting method is proposed and tested by simulations. Then two methods of outputting space voltage vectors are presented and compared, Finally, the experimental results of PMSM servo system are given. Simulation and experimental results confirm that this fully digital control system has good performance of speed response.<<ETX>>","PeriodicalId":244042,"journal":{"name":"Proceedings of 1995 International Conference on Power Electronics and Drive Systems. PEDS 95","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116154344","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}
{"title":"The effect of parasitic bipolar transistor on the performance and reliability of scaled vertical power DMOSFETs","authors":"K. Fischer, K. Shenai","doi":"10.1109/PEDS.1995.404914","DOIUrl":"https://doi.org/10.1109/PEDS.1995.404914","url":null,"abstract":"The parasitic bipolar transistor inherent in the silicided vertical double diffused MOSFET (DMOSFET) can greatly affect its performance and reliability. Scaled low-voltage power DMOSFETs with TiSi/sub 2/ source contacts were reported and anomalous \"kinks\" in the output I-V characteristics were observed. It was shown that a high contact resistance of TiSi/sub 2/ contacts to the p-body diffusion caused the high output conductance. In this paper, a two-dimensional (2D) device simulator was used to investigate in detail the impact of the parasitic bipolar transistor on the static and dynamic switching characteristics of scaled silicided power MOSFETs. A mixed device and circuit simulator was used to determine the effect of bipolar parameters on the switching characteristics of devices under resistive and unclamped inductive switching (UIS) conditions. It is shown that a shallow surface-diffused p/sup +/ region is necessary to suppress the parasitic bipolar transistor-induced deleterious effects in developing the next generation of scaled power MOS technologies.<<ETX>>","PeriodicalId":244042,"journal":{"name":"Proceedings of 1995 International Conference on Power Electronics and Drive Systems. PEDS 95","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123680304","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}
{"title":"High performance speed control for torsional system based on H/sup /spl infin// control theory","authors":"S. Morimoto, M. Ohashi, Y. Takeda, K. Taniguchi","doi":"10.1109/PEDS.1995.404962","DOIUrl":"https://doi.org/10.1109/PEDS.1995.404962","url":null,"abstract":"This paper presents a speed control strategy for the torsional vibration systems such as industrial plants and industrial robots. The H/sup /spl infin// control theory is applied to design the speed controller for the two-mass resonant system. This controller determines the closed-loop characteristics such as the suppression of torsional vibration and the rejection of torque disturbance. Moreover, the two-degrees-of-freedom controller based on the H/sup /spl infin// controller is designed to improve the tracking characteristics for the commanded speed. The high-order H/sup /spl infin// controller is suitably reduced to make it easy to apply the practical system. The experiments show the excellent performance of the proposed control strategy compared with the conventional PI control.<<ETX>>","PeriodicalId":244042,"journal":{"name":"Proceedings of 1995 International Conference on Power Electronics and Drive Systems. PEDS 95","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125127101","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}
{"title":"Analysis, design and performance of magnetic couplings","authors":"M. Nagrial","doi":"10.1109/PEDS.1995.404995","DOIUrl":"https://doi.org/10.1109/PEDS.1995.404995","url":null,"abstract":"The paper presents a critical review of existing design methods for magnetic couplings. Based on the analysis and design optimisation, a prototype synchronous type coupling is built and tested. The experimental performance is compared with theoretical performance and the agreement is quite good.<<ETX>>","PeriodicalId":244042,"journal":{"name":"Proceedings of 1995 International Conference on Power Electronics and Drive Systems. PEDS 95","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129648061","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}
{"title":"A low distortion inverter without low-frequency magnetics for UPS application","authors":"S. Biswas, B. Basak, T. Basu","doi":"10.1109/PEDS.1995.404897","DOIUrl":"https://doi.org/10.1109/PEDS.1995.404897","url":null,"abstract":"The increasing usage of digital data processing equipment has increased the demand for small capacity, compact, low-cost and energy-efficient UPS systems as a reliable power source. UPS systems utilise a power conversion stage from the battery backup to an output AC voltage compatible with the commercial supply, conventionally using a power frequency isolated step-up transformer. Recently, high frequency power conversion techniques have been used to replace the low frequency transformer by a high frequency power stage and transformer design reducing the size and weight of the overall equipment significantly. This paper presents an alternative approach to a compact inverter for UPS application by synthesizing a low distortion stepped waveform from a high voltage DC bus, without the need for output transformer or filter. A high frequency DC to DC power converter is used to generate the high voltage DC bus from the low voltage battery using a lightweight high frequency transformer. Thus, no low frequency magnetics are necessary.<<ETX>>","PeriodicalId":244042,"journal":{"name":"Proceedings of 1995 International Conference on Power Electronics and Drive Systems. PEDS 95","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129427809","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}
{"title":"Non-impact printer power and motor control system on a chip","authors":"J. Masson, S. Barrow","doi":"10.1109/PEDS.1995.404940","DOIUrl":"https://doi.org/10.1109/PEDS.1995.404940","url":null,"abstract":"An integrated circuit chip set has been developed that realizes a color nonimpact printer power supply and motor control system. The two ICs include three switch mode PWM controllers, two unipolar stepper motor drivers, a DC motor H-bridge, a serial control port, and a host of peripheral system functions. Focus is placed on power management and how individual circuits are customized to minimize on-chip power dissipation.<<ETX>>","PeriodicalId":244042,"journal":{"name":"Proceedings of 1995 International Conference on Power Electronics and Drive Systems. PEDS 95","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129203640","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}
{"title":"Solving nonlinear cost function for optimal PWM strategy","authors":"J.X. Lee, W. Bonwick","doi":"10.1109/PEDS.1995.404889","DOIUrl":"https://doi.org/10.1109/PEDS.1995.404889","url":null,"abstract":"It is difficult to solve the nonlinear cost function (CF) for selected harmonic elimination pulse width modulation (SHE PWM) strategy. It is extremely important to have a good initial guess before solving the CF. In this paper, a new algorithm for solving the CF on a mainframe computer is explored. A new auxiliary algorithm to predict the solution of the CF with a large degree of freedom is proposed. At the same time, an algorithm is established for DSP-based microprocessors to generate essentially satisfying switching patterns.<<ETX>>","PeriodicalId":244042,"journal":{"name":"Proceedings of 1995 International Conference on Power Electronics and Drive Systems. PEDS 95","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127590388","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}