Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
POWER CONVERSION DEVICE, COMPRESSOR, BLOWER, AND AIR CONDITIONING DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/049299
Kind Code:
A1
Abstract:
This power conversion device comprises: a rectifier that rectifies a voltage supplied from a three-phase alternating current power source; a step-down circuit that has a step-down switching element, a reactor, a reverse current prevention element, and a smoothing capacitor, and that lowers a direct current voltage supplied from the rectifier; and an inverter circuit that converts the direct current voltage smoothed by the smoothing capacitor to an alternating current voltage. The power conversion device has: an imbalance determination means that determines whether a voltage imbalance has occurred in the three-phase alternating current power source on the basis of the states of the step-down circuit and of the smoothing capacitor; and a step-down control means that causes the step-down switching element to switch if the imbalance determination means determines that a voltage imbalance has occurred.

Inventors:
TSUMURA, Akihiro (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
TAKATA, Shigeo (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
SAKANOBE, Kazunori (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
KUSUBE, Shinsaku (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
Application Number:
JP2017/032405
Publication Date:
March 14, 2019
Filing Date:
September 08, 2017
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
MITSUBISHI ELECTRIC CORPORATION (7-3 Marunouchi 2-chome, Chiyoda-ku Tokyo, 10, 〒1008310, JP)
International Classes:
H02M5/44; H02M7/48
Domestic Patent References:
WO2014106894A12014-07-10
Foreign References:
JP2013219985A2013-10-24
JP2009189241A2009-08-20
JP2014236653A2014-12-15
Attorney, Agent or Firm:
KISA PATENT & TRADEMARK FIRM (East 8F, TORANOMON TWIN BLDG. 10-1 Toranomon 2-chome, Minato-k, Tokyo 01, 〒1050001, JP)
Download PDF: