Openable Coil for Magnetic Pulse Industrial Applications

Summary form only given. In several industrial applications of pulsed magnetic processes, opening of the solenoids is required for reasons such as extracting finished or closed work piece, getting into place or around protrusions, etc. Traditional methods for constructing these openable coils use various types of contacts to provide a way for the working current to flow from one part of the coil to another. This method, however, is not suitable for pulsed-power current magnitudes which reach hundreds of kilo-Amperes and have very fast rise times. In conditions such as these, currents will not flow through the whole contact area, but rather through its linear circumference. A more effective way is to have inductive connection between the coil´s parts. One-turn and multi-turn systems based on inductive connection from fixed power source to removable parts of the coil have been developed, designed and produced. Experimental samples of these coils were tested at different current and frequency regimes and the main factors governing the coil´s efficiency in one-turn and multi-turn systems were noted. Efficiencies of 70-80% that of the baseline conventional (solid non-opening) coils of the same type and dimensions were achieved, leading to the design of pre-industrial technology demonstrators. These beta systems were used for industrial with good results.