Title:
An electric power unit and a power consumption estimation method
Document Type and Number:
Japanese Patent JP6239370
Kind Code:
B2
Abstract:
The purpose of the present invention is to easily and accurately estimate the power consumed by a load, without detecting the input voltage from an AC power supply. A control circuit (20), in accordance with an input current, determines whether a drive pulse for opening and closing a switching member (16) is to be on or off, doing so in such a way that when the input voltage from the AC power supply (11) is constant, the DC voltage supplied to the load at a prescribed input current is constant. Then, on the basis of the input current and the DC voltage, the control circuit (20) estimates the input voltage, and calculates the power consumed by the load (15) from the input voltage, the input current, and the power factor.
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Inventors:
Atsushi Akita
Application Number:
JP2013264306A
Publication Date:
November 29, 2017
Filing Date:
December 20, 2013
Export Citation:
Assignee:
MITSUBISHI HEAVY INDUSTRIES,LTD.
International Classes:
H02M7/12
Domestic Patent References:
| JP2006304586A | ||||
| JP2013201805A | ||||
| JP2013106455A |
Attorney, Agent or Firm:
Noriharu Fujita
Kunio Ueda
Kunio Ueda
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