New automatic regulation system of electron beam welder cathode heating source
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摘要: 开发了一种新型电子束焊机阴极加热电源自动调节系统,包括新型主电路拓扑和对应控制策略,该系统能够使阴极处在最佳加热电流状态,从而提高电子束流稳定性.并且在检测到电子枪未加高压时,阴极加热电流自动关闭,在加有高压但束流给定为零时,阴极加热电流自动减少,能大幅增加阴极的使用寿命.经试验证明该系统相比传统阴极加热电源操作简洁、快速和准确,对焊缝成形质量好.Abstract: 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.
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