In view of such issues as high movement speed

multiple dynamic parameters and difficulty in accurate monitoring of the permanent magnet repulsion mechanism for short stroke DC vacuum circuit breaker

a kind of multiple parameter dynamic characteristic monitoring system is designed. The permanent magnet repulsion mechanism for 400 V/400 A/25 kA DC vacuum circuit breaker is taken as the research object

the optocoupler isolation technology is used to collect the voltage simulation signal of the opening and closing coil and

at the same time

the sensing technology and second-order filtering mode are used for noise reduction collection of the current and displacement signal. The upper computer display interface is developed independently based on the C# to achieve the real-time synchronous display of multiple parameters of the short stroke and fast operating mechanism. It is known through comparison and analysis of monitoring parameters of current sensor and mechanical characteristic tester that the collection error of the system can be controlled within 3.5%.