Title:
電力変換装置
Document Type and Number:
Japanese Patent JP6539354
Kind Code:
B2
Abstract:
The purpose of the present invention is to safely use a relay without causing a contact failure in an inrush prevention circuit of a power conversion device, said relay switching between a voltage at contact time and a voltage at hold time. The power conversion device is provided with: a DC conversion unit for converting an AC voltage to a DC voltage; an inrush prevention circuit equipped with a resistor one end of which is connected to the DC conversion unit, and a relay connected to the resistor in parallel; a DC smoothing unit equipped with a smoothing capacitor connected to the other end of the resistor; and a control unit for controlling the inrush prevention circuit. The control unit determines, on the basis of voltage information of a power supply for operating the relay and voltage information of the smoothing capacitor, whether to apply a contact voltage to the relay or to apply a hold voltage smaller than the contact voltage to the relay.
More Like This:
Inventors:
Keisuke Tanabe
Kazumi Hotta
Naoki Takada
Kazumi Hotta
Naoki Takada
Application Number:
JP2017551431A
Publication Date:
July 03, 2019
Filing Date:
November 18, 2015
Export Citation:
Assignee:
Hitachi Industrial Equipment Systems Co., Ltd.
International Classes:
H02M7/06; H01H47/00; H01H47/04; H02M7/48
Domestic Patent References:
| JP2010146819A | ||||
| JP6038359A | ||||
| JP2013101843A | ||||
| JP5730454B1 | ||||
| JP5030746A |
Attorney, Agent or Firm:
Yuji Toda