An AC HPD test system

By designing an AC HPD test system, using an MCU microcontroller and an AC output control unit, the problem of existing technologies being incompatible with high-voltage AC and DC testing was solved, enabling realistic simulation and defect detection of SiC devices.

CN224456936UActive Publication Date: 2026-07-03杭州中安电子股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
杭州中安电子股份有限公司
Filing Date
2025-06-13
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Existing technologies cannot simultaneously support high-voltage AC and DC testing, and cannot realistically simulate the AC high-voltage stress of SiC devices in actual operation, resulting in the inability to detect potential defects.

Method used

An AC HPD test system was designed, which uses an MCU microcontroller and an AC output control unit. Through a relay group and a voltage waveform selection circuit unit, combined with an electric voltage regulator and a transformer, the bias voltage switching and voltage waveform adjustment can be realized, and it can be compatible with high voltage AC and DC tests.

Benefits of technology

It achieves dynamic adjustment in AC voltage output, can switch between high-voltage AC and DC tests, realistically simulates the working conditions of devices, and discovers defects that cannot be found by conventional tests.

✦ Generated by Eureka AI based on patent content.

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Abstract

This utility model relates to testing technology for SiC devices, and discloses an AC HPD testing system for AC high-temperature testing of SiC module devices. The system includes a drive detection module, a power supply terminal, and a device under test (DUT). The power supply terminal provides voltage to the drive detection module and the DUT. The drive detection module drives and tests the DUT. The drive detection module includes an MCU microcontroller and an AC output control unit. The power supply terminal provides power to the MCU microcontroller and the AC output control unit. The MCU microcontroller controls the AC signal output by the AC output control unit. This utility model's testing system uses 220V / 50Hz AC mains power as input for the AC voltage output. A voltage regulator dynamically adjusts the voltage, and a high-voltage reed relay switches the bias voltage, allowing for simultaneous high-voltage AC and DC testing.
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