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A New High Performance Auto-Tuning Digital Control Circuit for Buck-Boost Converter
Fujio Kurokawa,Taku Ishibashi,Yoshihiko Komichi,Tadatoshi Babasaki 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5
The purpose of this paper is to present the dynamic characteristics of the new high performance autotuning digital control circuit for buck-boost converter when the step change of the load resistance R from 20 Ω to 10Ω. The buck-boost dc-dc converter is used with wide input voltage changing. At the same time, the suitable proportional gain and bias value are changing against the input voltage and the load resistance of the converter. So, we took two methods that changing proportional gain automatically and changing bias value against the input voltage, the load resistance and the loss of the converter. As a result, using this proposed method it is revealed that not only the dynamic characteristic but also regulation characteristic can be improved and it is effective for wide range input voltage. Especially, the steady-state error is improved from 470㎷ to 50㎷ when the input voltage is 5V, 700㎷ to 40㎷ when the input voltage is 15V, respectively.
Dynamic Characteristics of DC-DC Converters Using Digital Filters
Fujio Kurokawa,Masashi Okamatsu,Taku Ishibashi,Yasuyuki Nishida 전력전자학회 2009 JOURNAL OF POWER ELECTRONICS Vol.9 No.3
This paper presents the dynamic characteristics of buck and buck-boost dc-dc converters with digital filters. At first, the PID, the minimum phase FIR filter and the IIR filter controls are discussed in the buck dc-dc converter. Comparisons of the dynamic characteristics between the buck and buck-boost converters are then discussed. As a result, it is clarified that the superior dynamic characteristics are realized in the IIR filter method. In the buck converter, the undershoot is less than 2% and the transient time is less than 0.4ms. On the other hand, in the buck-boost converter, the undershoot is about 3%. However, the transient time is approximately over 4ms because the output capacitance is too large to suppress the output voltage ripple in this type of converter.
Dynamic Characteristics of DC-DC Converters Using Digital Filters
Kurokawa, Fujio,Okamatsu, Masashi,Ishibashi, Taku,Nishida, Yasuyuki The Korean Institute of Power Electronics 2009 JOURNAL OF POWER ELECTRONICS Vol.9 No.3
This paper presents the dynamic characteristics of buck and buck-boost dc-dc converters with digital filters. At first, the PID, the minimum phase FIR filter and the IIR filter controls are discussed in the buck dc-dc converter. Comparisons of the dynamic characteristics between the buck and buck-boost converters are then discussed. As a result, it is clarified that the superior dynamic characteristics are realized in the IIR filter method. In the buck converter, the undershoot is less than 2% and the transient time is less than 0.4ms. On the other hand, in the buck-boost converter, the undershoot is about 3%. However, the transient time is approximately over 4ms because the output capacitance is too large to suppress the output voltage ripple in this type of converter.
Rescue levodopa/carbidopa intestinal gel for secondary deep brain stimulation failure
Juan Miguel Pilar Bautista,Genko Oyama,Maierdanjiang Nuermaimaiti,Satoko Sekimoto,Fuyuko Sasaki,Taku Hatano,Kenya Nishioka,Masanobu Ito,Atsushi Umemura,Yuji Ishibashi,Yasushi Shimo,Nobutaka Hattori 대한파킨슨병및이상운동질환학회 2020 Journal Of Movement Disorders Vol.13 No.1
The long-term efficacy of deep brain stimulation (DBS) for motor fluctuations in advanced Parkinson’s disease (PD) has been well established; however, motor fluctuations may recur over time despite multiple adjustments of DBS settings and medications.