Title:
力率改善装置
Document Type and Number:
Japanese Patent JP6815086
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a power factor improvement device into which a three-phase current is input, for surely improving power factor and for conducting stable power conversion with a simple structure and operation.SOLUTION: A power factor improvement device comprises: a first, a second and a third input ends a, b, c into which a three-phase alternating current is input; a positive electrode output end p and a negative electrode output end n connected to a load; three reactors La, Lb, Lc, each one end of which connect to the first, the second and the third input ends; one or a plurality of switching elements having one end D applied with voltages from each other end of three reactors, another end S connected to the negative output end n, and a control end G for switch control; a first, a second and a third rectification means D1, D2, D3, one ends of which are applied with the voltages from each of other ends of three reactors and to which a current running to the positive electrode output end p can be respectively conducted; and a smoothing capacitor C connected between the positive electrode output end p and the negative electrode output end n. The control end of the one or the plurality of switching elements is controlled by a control signal having a constant duty ratio.SELECTED DRAWING: Figure 1
Inventors:
Shoji Haneda
Application Number:
JP2016056584A
Publication Date:
January 20, 2021
Filing Date:
March 22, 2016
Export Citation:
Assignee:
ntn corporation
International Classes:
H02M7/12
Domestic Patent References:
| JP7250471A | ||||
| JP2005328624A |
Foreign References:
| WO2015063869A1 | ||||
| US20150162823 |
Attorney, Agent or Firm:
Takashiro Kojima
Noriko Kawai
Noriko Kawai