Power converter
The power conversion device improves resistance to current detector failures by using two detectors and an abnormality detection unit to ensure operational continuity with a simplified design, reducing component count and costs.
JP2026090957APending Publication Date: 2026-06-03TMEIC CORP (100 00)
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- TMEIC CORP (100 00)
- Filing Date
- 2024-11-22
- Publication Date
- 2026-06-03
AI Technical Summary
Technical Problem
Existing power conversion devices face challenges in maintaining operational continuity and reducing manufacturing costs due to the increased complexity and cost associated with providing multiple current detectors to handle failures.
Method used
A power conversion device utilizing two current detectors, a control device, and an abnormality detection unit to determine normal current values and generate control signals based on deviations, allowing continued operation even if one detector fails, thereby simplifying the configuration and reducing component count.
Benefits of technology
Enhances resistance to current detector failures with a simpler configuration, maintaining operational continuity while minimizing the number of components and manufacturing costs.
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Smart Images
Figure 2026090957000001_ABST
Abstract
To provide a power converter that offers improved resistance to current detector failure with a simpler configuration. [Solution] A power conversion device is provided, comprising: a main circuit unit that performs at least one of the conversion of AC power to DC power and the conversion of DC power to AC power; a first current detector and a second current detector that detect the magnitude of the AC current flowing through the main circuit unit; and a control device that controls the operation of the power conversion by the main circuit unit. The control device has an abnormality detection unit that detects abnormalities in the first current detector and the second current detector based on the current values of the first current detector and the second current detector and the current command value, and calculates the deviation between the current value of the current detector detected as normal and the current command value among the two current detectors, the first current detector and the second current detector; and a control calculation unit that generates a control signal to cause the main circuit unit to output an AC current of a magnitude corresponding to the current command value based on the deviation.
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