Title:
POWER SOURCE DEVICE AND PROGRAMMABLE CONTROLLER
Document Type and Number:
WIPO Patent Application WO/2012/059983
Kind Code:
A1
Abstract:
In order to measure input power as accurately as possible, a power source device (10) is provided with: an AC/DC converter (11) that generates an internal direct current power source from an alternating current commercial power source; an output voltage measuring unit (12) that measures the output voltage from the internal power source; an output current measuring unit (13) that measures the output current from the internal power source; a temperature measuring unit (14 or the like) that measures the ambient temperature of this power source device; a storage device (16) that pre-stores conversion efficiency data (111) that records the associations between the ambient temperature and the conversion efficiency (η) of the AC/DC converter (11); and an operating unit (17) that determines the conversion efficiency (η) on the basis of the conversion efficiency data (111) and the ambient temperature measurements according to the temperature measuring unit, and calculates the input power of a commercial power source using the determined conversion efficiency (η), the output voltage measurement according to the output voltage measuring unit (12), the output current measurement according to the output current measuring unit (13), and the relational expression, input power = output voltage × output current/conversion efficiency (η).
Inventors:
YAMANAKA, Takahiko (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
Application Number:
JP2010/069522
Publication Date:
May 10, 2012
Filing Date:
November 02, 2010
Export Citation:
Assignee:
Mitsubishi Electric Corporation (7-3 Marunouchi 2-chome, Chiyoda-ku Tokyo, 10, 〒1008310, JP)
三菱電機株式会社 (〒10 東京都千代田区丸の内二丁目７番３号 Tokyo, 〒1008310, JP)
三菱電機株式会社 (〒10 東京都千代田区丸の内二丁目７番３号 Tokyo, 〒1008310, JP)
International Classes:
G01R21/06; G05B19/05; H02M7/06
Attorney, Agent or Firm:
SAKAI, Hiroaki (Sakai International Patent Office, Kasumigaseki Building 2-5, Kasumigaseki 3-chome, Chiyoda-k, Tokyo 20, 〒1006020, JP)
Claims:
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