Title:
POWER CONVERSION DEVICE
Document Type and Number:
Japanese Patent JP2019216588
Kind Code:
A
Abstract:
To provide a power conversion device that can record information necessary for failure diagnosis with the addition of a simple configuration for the state of destruction due to reverse connection of a power supply.SOLUTION: A power conversion device 1 includes an IC 4, a three-phase inverter circuit 5, and a microcomputer 20. The IC 4 includes a power supply circuit 41 (low dropout voltage regulator), a current detection circuit 42, an inverting boost circuit 43, and a reverse voltage detection circuit 44. The microcomputer 20 operates by being supplied with power from the power supply circuit 41. When a battery 2 is reversely connected between power input terminals A1 and A2, a current flows through a diode of the three-phase inverter circuit 5, and a voltage of -2 Vf is applied. The inverting boosting circuit 43 supplies power to the power supply circuit 41 by the boosting operation to operate the microcomputer 20, and stores the reverse voltage in a nonvolatile memory 21.SELECTED DRAWING: Figure 1
Inventors:
IMURA TAKASHI
Application Number:
JP2019100271A
Publication Date:
December 19, 2019
Filing Date:
May 29, 2019
Export Citation:
Assignee:
DENSO CORP
International Classes:
H02M7/48
Attorney, Agent or Firm:
Patent Business Corporation Sato International Patent Office