Title:
MOTOR DRIVING DEVICE AND REFRIGERATION CYCLE DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/255385
Kind Code:
A1
Abstract:
The present invention comprises: an inverter circuit (2) that converts a direct-current voltage output from a direct-current voltage power supply (1) into a sinusoidal pseudo alternating-current voltage, and outputs the voltage to a motor (4); a first current detection circuit (7) that uses at least one shunt resistor (71) to detect current flowing to the motor (4); a second current detection circuit (8) that uses two or more ACCTs (81, 82) to detect current flowing to the motor (4); and a controller (3) that uses a first current value detected by the first current detection circuit (7) and/or a second current value detected by the second current detection circuit (8) to control the sinusoidal pseudo alternating-current voltage output from the inverter circuit (2) with pulse width modulation. If the controller (3) controls the sinusoidal pseudo alternating-current voltage output from the inverter circuit (2) in an overmodulation state where the modulation rate exceeds 1, the controller determines whether to use the first current value or the second current value on the basis of the modulation rate.
Inventors:
NORIMATSU YASUHARU (JP)
SHINOMOTO YOSUKE (JP)
SHINOMOTO YOSUKE (JP)
Application Number:
PCT/JP2019/024761
Publication Date:
December 24, 2020
Filing Date:
June 21, 2019
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H02P27/08
Domestic Patent References:
| WO2017037941A1 | 2017-03-09 |
Foreign References:
| JP2004282974A | 2004-10-07 | |||
| JP2006254671A | 2006-09-21 |
Attorney, Agent or Firm:
TAKAMURA, Jun (JP)
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