Title:
STABILIZED DC POWER SOURCE DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/158278
Kind Code:
A1
Abstract:
Disclosed is an inexpensive power source device with which a stable power source required for low-voltage measurement equipment is supplied from a high voltage solar battery power source which is subject to severe variations. A stabilized DC power source device which steps down DC input voltage obtained from a solar battery and outputs the stepped-down voltage to a load such as measurement equipment, wherein the stabilized DC power source device comprises: a series-type first constant-voltage power source circuit that performs voltage step-down and is connected to the solar battery and provided with a constant-current control circuit; a switching circuit that is connected to the first constant-voltage power source circuit; a switchable second constant-voltage power source circuit that is connected to the switching circuit; and a voltage detection circuit that detects the output voltage of the first constant-voltage power source circuit. The output voltage of the first constant-voltage power source circuit is detected and, if the detected voltage is greater than or equal to a first determination voltage, the switching circuit is closed and power is supplied to the load from the second constant-voltage power source circuit. If the detected voltage is less than or equal to a second determination voltage, which is lower than the first determination voltage, the switching circuit is opened and the power supplied to the load from the second constant-voltage power source circuit is stopped.
Inventors:
SHIZUYA, Osamu (1-27, Fukae-Kita 3-chome, Higashinari-ku, Osaka-sh, Osaka 01, 〒5370001, JP)
静谷 治 (〒01 大阪府大阪市東成区深江北３丁目１番２７号 オーナンバ株式会社内 Osaka, 〒5370001, JP)
MIYATA, Yukitaka (1-27, Fukae-Kita 3-chome, Higashinari-ku, Osaka-sh, Osaka 01, 〒5370001, JP)
静谷 治 (〒01 大阪府大阪市東成区深江北３丁目１番２７号 オーナンバ株式会社内 Osaka, 〒5370001, JP)
MIYATA, Yukitaka (1-27, Fukae-Kita 3-chome, Higashinari-ku, Osaka-sh, Osaka 01, 〒5370001, JP)
Application Number:
JP2010/003925
Publication Date:
December 22, 2011
Filing Date:
June 14, 2010
Export Citation:
Assignee:
ONAMBA CO., LTD. (1-27, Fukae-Kita 3-chome Higashinari-ku, Osaka-sh, Osaka 01, 〒5370001, JP)
オーナンバ株式会社 (〒01 大阪府大阪市東成区深江北３丁目１番２７号 Osaka, 〒5370001, JP)
SHIZUYA, Osamu (1-27, Fukae-Kita 3-chome, Higashinari-ku, Osaka-sh, Osaka 01, 〒5370001, JP)
静谷 治 (〒01 大阪府大阪市東成区深江北３丁目１番２７号 オーナンバ株式会社内 Osaka, 〒5370001, JP)
オーナンバ株式会社 (〒01 大阪府大阪市東成区深江北３丁目１番２７号 Osaka, 〒5370001, JP)
SHIZUYA, Osamu (1-27, Fukae-Kita 3-chome, Higashinari-ku, Osaka-sh, Osaka 01, 〒5370001, JP)
静谷 治 (〒01 大阪府大阪市東成区深江北３丁目１番２７号 オーナンバ株式会社内 Osaka, 〒5370001, JP)
International Classes:
G05F1/67
Attorney, Agent or Firm:
KAZAHAYA, Nobuaki et al. (Shin-Ei Building 6th Fl, 6-20 Tosabori 1-chome, Nishi-ku, Osaka-sh, Osaka 01, 〒5500001, JP)
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Claims:
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