Title:
空気調和機
Document Type and Number:
Japanese Patent JP6768175
Kind Code:
B2
Abstract:
A load driving device includes a smoothing capacitor, an inverter, and a control unit. The inverter includes two legs, each including upper and lower arm switching elements connected in series and converts direct-current power stored in the smoothing capacitor into alternating-current power. The control unit performs voltage drop prevention control for preventing the voltage across the smoothing capacitor from becoming a negative voltage. The control unit stops power running control on the load when the capacitor voltage is higher than the sum of a first voltage and a second voltage. The first voltage is a potential difference between a second terminal and a first terminal in the upper-arm. The second voltage is a potential difference between a second terminal and a first terminal in the lower-arm in the same leg as the leg of the upper-arm.
Inventors:
Hatakeyama Kazunori
Application Number:
JP2020521386A
Publication Date:
October 14, 2020
Filing Date:
August 08, 2018
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H02M7/48; F24F11/86; F25B49/02; H02P5/74; H02P27/06; H02P29/024
Domestic Patent References:
| JP2014204617A | ||||
| JP2014140272A |
Foreign References:
| WO2017022084A1 |
Attorney, Agent or Firm:
Jun Takamura