ZHANG Wei, JIANG Buhui, HE Shi, et al.Design of Bias Power Supply for High-frequency Pulsed Electron Beam[J].Electric Welding Machine, 2022, 52(5): 67-73.
ZHANG Wei, JIANG Buhui, HE Shi, et al.Design of Bias Power Supply for High-frequency Pulsed Electron Beam[J].Electric Welding Machine, 2022, 52(5): 67-73. DOI: 10.7512/j.issn.1001-2303.2022.05.10.
Design of Bias Power Supply for High-frequency Pulsed Electron Beam
In order to realize high-frequency pulse bias with steep rising and falling edges and improve the quality of high-frequency pulse electron beam, a main circuit structure of series connection of base value bias DC power supply, pulse bias DC power supply and high-voltage chopper main circuit is proposed. The high-voltage chopper main circuit converts the pulse bias DC power supply into high-frequency pulse bias output through MOSFET power switch on and off, which make the pulse bias has rapidly changing rising and falling edges; Based on the working principle of modulation and demodulation, a high-voltage isolated communication power supply is designed to realize the reliable transmission of high frequency pulse bias parameters such as pulse frequency and duty cycle and commands from low voltage circuit to high voltage chopper circuit and generate the PWM waveform; A special high-voltage isolated power supply is designed to realize the reliable power supply and drive of the high-voltage chopper circuit at the high-voltage end. Based on the above technology, a high-frequency pulse electron beam bias power supply is developed, and a high-frequency pulse bias output with steep rising and falling edges is obtained. The rising edge of pulse bias is not more than 1 μs at 20 kHz.
关键词
电子束脉冲高频偏压电源调制解调
Keywords
electron beampulsehigh frequencybias power supplymodulation and demodulation
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