Title:
電源装置
Document Type and Number:
Japanese Patent JP5813347
Kind Code:
B2
Abstract:
A power supplying device performs both of a suppression of EMI noise and a reduction in an output voltage. In the power supply device, a switching control device that controls a switching element according to a pulse control signal includes a PPM circuit that modulates a pulse position; a PWM circuit that modulates a pulse width; and a pulse generator circuit that generates a pulse modulated by the PPM circuit and the PWM circuit. When a pulse interval of the pulse modulated in the pulse position by the PPM circuit is sparser than the pulse interval of the pulse before the modulation, the PWM circuit lengthens the pulse width. On the contrary, when the pulse interval of the pulse modulated in the pulse position by the PPM circuit is denser than the pulse interval of the pulse before the modulation, the PWM circuit shortens the pulse width.
Inventors:
Nakagawa Jusei
Application Number:
JP2011065231A
Publication Date:
November 17, 2015
Filing Date:
March 24, 2011
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
H02M3/155; H02M3/28
Domestic Patent References:
| JP2003153526A | ||||
| JP2006288103A | ||||
| JP2006288104A | ||||
| JP2004266780A | ||||
| JP7245942A |
Foreign References:
| US20100275052 | ||||
| US20070109825 | ||||
| WO2009123054A1 |
Other References:
片山靖,菅原聡,周波数拡散PWM制御DC-DCコンバータの出力電圧リプルに関する検討,電子情報通信学会技術研究報告. EE, 電子通信エネルギー技術,日本,一般社団法人電子情報通信学会,2003年 2月 6日,Vol.102,No.643,P.95-P.100
Attorney, Agent or Firm:
Yamato Tsutsui