Title:
MOTOR CONTROLLER AND AIR CONDITIONER
Document Type and Number:
Japanese Patent JP2019213301
Kind Code:
A
Abstract:
To provide a highly reliable motor controller.SOLUTION: A motor controller 1 includes: an upper arm 51 composed of a plurality of switching elements connected to a positive electrode of a DC power supply; a lower arm 52 composed of a plurality of switching elements connected to a negative electrode of the DC power supply; an inverter module 5 for converting DC power into AC power to drive a compressor motor 6; a shunt resistor R for detecting a current flowing to a DC side of the inverter module 5; and a controller 2 for outputting a drive signal for driving the inverter module 5, outputting a drive signal for switching either the upper arm 51 or lower arm 52 at a predetermined duty when the compressor motor 6 stops, and reducing the duty when a current value detected by the shunt resistor R exceeds a predetermined setting value.SELECTED DRAWING: Figure 1
Inventors:
SUZUKI HISANORI
KINOSHITA KEN
KASAHARA REI
KINOSHITA KEN
KASAHARA REI
Application Number:
JP2018105557A
Publication Date:
December 12, 2019
Filing Date:
May 31, 2018
Export Citation:
Assignee:
HITACHI JOHNSON CONTROLS AIR CONDITIONING INC
International Classes:
H02P3/22; F24F11/88; H02P27/08
Domestic Patent References:
| JP2018042297A | 2018-03-15 | |||
| JP2008271612A | 2008-11-06 | |||
| JP2014168332A | 2014-09-11 | |||
| JPS63190578A | 1988-08-08 |
Foreign References:
| WO2017006485A1 | 2017-01-12 |
Attorney, Agent or Firm:
Isono International Patent and Trademark Office