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Your search keyword '"Yamamoto, Katsuhiko"' showing total 4 results
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4 results on '"Yamamoto, Katsuhiko"'

1. Stability in high-output-voltage push-pull current-fed converters

Author

Ohtsu, Satoshi, Yamashita, Takashi, Yamamoto, Katsuhiko, and Sugiura, Toshiyuki

Subjects
Power supply (Electronics) -- Research, Electric current converters -- Research, Electric transformers -- Usage, Magnetic induction (Electromagnetic induction) -- Analysis, Business, Electronics, Electronics and electrical industries
Abstract

This paper studies the relationship between the magnetizing inductances of a transformer and of a choke coil in high-voltage power supplies. This analysis defines the conditions for high switching frequency and stable operation of high-voltage power supplies without the power loss increase. This approach is confirmed by the implementation of a high-voltage power supply operating at 200 kHz with a high efficiency of 86%.

Published
1993

2. Stability in high-output-voltage push-pull current-fed converters

Author

T. Yamashita, S. Ohtsu, T. Sugiura, and Yamamoto Katsuhiko

Subjects
Engineering, Switched-mode power supply, business.industry, Commutation cell, Electrical engineering, Choke, Power factor, law.invention, law, Power supply unit, Electrical and Electronic Engineering, Transformer, business, Switched-mode power supply applications, Power control
Abstract

The relationship between the magnetizing inductances of a transformer and of a choke coil in high-voltage power supplies is studied. The analysis defines the conditions for high switching frequency and stable operation of high-voltage power supplies without power loss increases. This approach is confirmed by the implementation of a high-voltage power supply operating at 200 kHz with an efficiency of 86%. >

Published
1993

3. Stable conditions in high-voltage output push-pull current-fed converters

Author

S. Ohtsu, Yamamoto Katsuhiko, and T. Sugiura

Subjects
Materials science, Electric Power Supplies, Switched-mode power supply, business.industry, Equivalent series inductance, Flyback transformer, Electrical engineering, Commutation cell, law.invention, Inductance, law, Transformer, business, Transformer types
Abstract

The authors analyze the relationship between the magnetizing inductance of a transformer and a choke-coil required to enhance the switching frequency and maintain a stable operation without increasing the power loss of high-voltage power supplies. The relationship between the transformer magnetizing inductance and the switching frequency in the highly efficient stable operation of a high-voltage output push-pull current-fed converter is also defined. Based on the analysis, high-voltage output power supplies can be designed raising the switching frequency from approximately 20 kHz to 200 kHz, without an increase in power loss. It is experimentally show that the efficiency is high over a wide frequency range if the transformer and the choke-coil magnetizing inductance have suitable values. >

Published
2002

4. A new BRAM DC current detector for a highly accurate DC-DC constant current converter

Author

Toshiyuki Sugiura and Yamamoto Katsuhiko

Subjects
Physics, business.industry, Amplifier, Detector, Electrical engineering, Inductor, law.invention, Magnetic circuit, Rectifier, law, Electromagnetic coil, Electronic engineering, Constant current, Resistor, business
Abstract

This paper describes the analysis and design method for a new biased rectifier amplifier (BRAM). The BRAM, driven by a high frequency square wave, employs a new self-biased circuit configuration. Applying the BRAM to a DC current detector makes it possible to obtain a highly accurate constant current DC-DC converter.

Published
1986

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