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Paper Abstract and Keywords
Presentation 2005-11-11 16:45
The Method to Improve the Resolution of Digital PWM
Eiji Takegami (Densei Lamda), Kohji Higuchi, Kazushi Nakano (Univ. Electro-Communications), Satoshi Tomioka (Densei Lamda)
Abstract (in Japanese) (See Japanese page) 
(in English) Recently, digitization of a controller is progressing for demands of intelligent, common hardware, etc.. In order to control the several converter topologies with common controller, the pulse generator that can generate arbitrary pulse is necessary, and it is realized easily by digitization of PWM generator. However, PWM generator by the digital circuit, a carrier wave turns into a stairs wave. The unit width of this stairs wave is decided with a clock cycle. Therefore, the resolution of PWM output pulse is dependent on the clock cycle. The more switching frequency becomes high, the more this dependability does a bad influence. This causes the very serious problem in digitization of the controller. In this paper, we propose a method to improve the resolution of digital PWM by using pulse composite technique. Furthermore, we manufactured a prototype DC-DC converter with the controller realized by DSP, and it is shown from the experiments that the proposed method is effective.
Keyword (in Japanese) (See Japanese page) 
(in English) PWM / Digital Control / Resolution / Switching Frequency / Pulse Composite / DSP / /  
Reference Info. IEICE Tech. Rep., vol. 105, no. 391, EE2005-45, pp. 37-41, Nov. 2005.
Paper # EE2005-45 
Date of Issue 2005-11-04 (EE) 
ISSN Print edition: ISSN 0913-5685
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Conference Information
Committee EE  
Conference Date 2005-11-11 - 2005-11-11 
Place (in Japanese) (See Japanese page) 
Place (in English) Kikai-Shinko-Kaikan Bldg. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To EE 
Conference Code 2005-11-EE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) The Method to Improve the Resolution of Digital PWM 
Sub Title (in English)  
Keyword(1) PWM  
Keyword(2) Digital Control  
Keyword(3) Resolution  
Keyword(4) Switching Frequency  
Keyword(5) Pulse Composite  
Keyword(6) DSP  
1st Author's Name Eiji Takegami  
1st Author's Affiliation Densei Lamda (Densei Lamda)
2nd Author's Name Kohji Higuchi  
2nd Author's Affiliation The University of Electro-Communications (Univ. Electro-Communications)
3rd Author's Name Kazushi Nakano  
3rd Author's Affiliation The University of Electro-Communications (Univ. Electro-Communications)
4th Author's Name Satoshi Tomioka  
4th Author's Affiliation Densei Lamda (Densei Lamda)
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Speaker Author-1 
Date Time 2005-11-11 16:45:00 
Presentation Time 30 minutes 
Registration for EE 
Paper # EE2005-45 
Volume (vol) vol.105 
Number (no) no.391 
Page pp.37-41 
Date of Issue 2005-11-04 (EE) 

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