直流断路器自激式磁吹装置优化设计OA

To improve the low-current breaking capability of the DC circuit breaker,a self-excited magnetic blowout device is added.However,during short-circuit tests,the magnetic blowout coil is severely distorted under the large electromagnetic force when subjected to short-circuit current.To solve this problem,this paper proposes to improve the structure of the magnetic blowing coil by adding glue-potting treatment,encapsulating the magnetic blowing coil in enhanced nylon.Firstly,the stress distribution of the enhanced nylon encapsulated on the magnetic coil is obtained through statics simulation,which verifies that the strength of the enhanced nylon meets its mechanical performance requirements.Secondly,the temperature field distribution of the magnetic blowing coil is obtained through temperature rise simulation,which verifies that the enhanced nylon material meets its maximum temperature rise conditions.Finally,the feasibility of the improved scheme confirmed through low current breaking tests and high current short-circuit breaking tests.