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Microbridge Rejustor™ Design Challenge Official Entry |
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Title: |
Series IGBT graceful degradation fault detection circuit |
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Abstract: |
Failed IGBTs can be detected by measuring the change in summed IGBT gate drive currents in a series stack of IGBTs. This allows IGBT failure monitoring for graceful degradation, and also enables system shutdown at the point that no further failures can be tolerated, in other words when catastrophic failure is imminent. A gate-drive transformer made from a ferrite toroid has response deviations due to manufacturing variations in the ferrite material. These deviations get worse over operating temperature variation. Resistance variations and operating temperature variations can both be corrected independently by use of eTC RejustorTM technology. This design benefits from both the high precision resistance adjustment and temperature stability offered by the eTC RejustorTM technology. |
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Submitted By: |
stevehi |
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Submitted On: |
12/31/2007 |
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Total Views: |
1209 |
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