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- Title
Marginal Checking Techniques.
- Abstract
The article discusses Marginal Checking Techniques. Within switching power supplies, one of the highest failure rate items is the input bridge rectifier. Normally there are about six bridge rectifiers per power supply. An incipient failure detection technique which works for these components may be able to pre-empt a significant portion of power supply failures. Although the monitoring of electrical parameters (i.e. reverse leakage current) proved feasible for marginal checking of bridge rectifiers, other potentially more powerful techniques for identification of incipient failures were found. In particular, ultrasonic transmission and acoustic emission techniques were determined to be capable of detecting cracking within the potting material of the bridge rectifier, thereby revealing a failure process at work within the device long before it causes a failure.
- Subjects
BRIDGE circuits; ELECTRONICS; BRIDGE rectifiers; ELECTRONIC circuits; POWER electronics; ELECTRIC current rectifiers
- Publication
Quality & Reliability Engineering International, 1990, Vol 6, Issue 3, p221
- ISSN
0748-8017
- Publication type
Article