Title:
A back flow prevention device, a power converter, and a frozen air harmony device
Document Type and Number:
Japanese Patent JP6173435
Kind Code:
B2
Abstract:
Provided is a backflow preventing device, including: a backflow preventing element connected between a power source and a load, for preventing a backflow of a current from the load side to the power source side; a commutation device configured to perform a commutation operation of causing a current to flow through an other path connected in parallel to the backflow preventing element; and a controller for changing a pulse width of a commutation drive signal for controlling the commutation device to perform the commutation operation based on a current flowing through the backflow preventing element, and transmitting the commutation drive signal having the changed pulse width to the commutation device. For example, the controller transmits the pulse to the commutation device 7 only for a necessary time period so that the commutation device 7 performs the commutation operation, to thereby reduce electric power relating to the commutation operation not contributing to the power conversion, and save energy.
Inventors:
Takuya Shimoda
Koichi Arisawa
Takashi Yamakawa
Uemura Keisuke
Shinsaku Kusube
Kenta Yuasa
Akihiro Tsumura
Koichi Arisawa
Takashi Yamakawa
Uemura Keisuke
Shinsaku Kusube
Kenta Yuasa
Akihiro Tsumura
Application Number:
JP2015508331A
Publication Date:
August 02, 2017
Filing Date:
March 18, 2014
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H02M3/155; F25B49/02
Domestic Patent References:
| JP59117459A | ||||
| JP2012231646A | ||||
| JP2012070580A |
Foreign References:
| WO2012120600A1 | ||||
| WO2012137258A1 |
Attorney, Agent or Firm:
Kiyoshi Yasushima
Takanashi Norio
Motoki Shandong
Murata Kensei
Moto Otani
Kentaro Yokoi
Takanashi Norio
Motoki Shandong
Murata Kensei
Moto Otani
Kentaro Yokoi