Title:
POWER CONVERSION DEVICE
Document Type and Number:
Japanese Patent JP2020198724
Kind Code:
A
Abstract:
To provide a power conversion device capable of detecting a phase current without causing noise and without any trouble even if a motor rotates at a low speed and it becomes difficult to detect a direct current flowing through an inverter circuit.SOLUTION: A duty correction unit 39 for correcting the duty of a PWM signal makes a correction to make an ON period of switching elements 18B, 18C in a specific carrier cycle to be equal to or greater than a minimum time Y required for detecting a current by a current detector 30 by moving and adding a part of the ON period of the switching elements in another carrier cycle during the ON period of the switching elements 18B, 18C of an inverter circuit 28 in the specific carrier cycle.SELECTED DRAWING: Figure 1
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Inventors:
KASHIWABARA TATSUKI
Application Number:
JP2019104361A
Publication Date:
December 10, 2020
Filing Date:
June 04, 2019
Export Citation:
Assignee:
SANDEN ADVANCED TECH CO LTD
International Classes:
H02M7/48
Domestic Patent References:
| JP2008113494A | 2008-05-15 | |||
| JP2010213407A | 2010-09-24 | |||
| JP2012125022A | 2012-06-28 |
Attorney, Agent or Firm:
Kei Amekasa