New automatic regulation system of electron beam welder cathode heating source

One new electron beam welder cathode heating current automatic control system was developed, which includes new main circuit topology and corresponding control strategy, and it can make cathode be optimal heating current status and improve electron beam stability. At the same time, cathode heating current can be turned off automatically when no high voltage, and cathode heating current can be reduced automatically when electron beam current import is zero, thus it can increase cathode life time. The test proves that this system operates simply, rapidly and exactly, and it can make good welding seam comparing with traditional cathode heating source.