Design and implementation of a miniaturized high voltage power supply for pulse traveling wave tube
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摘要: 为满足雷达整机对发射机小型化的需求，针对8～18 GHz宽带脉冲行波管设计了一种小型化高压电源。采用脉冲峰值功率设计方法，结合高压电容储能，实现了行波管在脉冲工作期间高压稳定输出。同时主功率逆变电路采用了移相全桥拓扑结构，高压整流电路采用了碳化硅二极管，这可减轻电源的散热压力，提高高压电源的功率密度。研制的小型化脉冲高压电源，阴极电压−6.5 kV，最大工作脉宽2 ms，峰值功率最大1600 W。与某型号脉冲行波管联调，在脉冲工作期间行波管输出射频信号功率稳定，测试结果验证了该设计方法的可行性。Abstract: To meet the demand of radar for miniaturization of transmitter, a miniaturized high-voltage power supply is designed for a certain type of TWT. The high voltage power supply adopts a phase shifted full bridge topology structure, and the high voltage rectifier circuit uses SiC diodes to improve the power density of the power supply. The miniaturized pulse high-voltage power supply has been developed, with a cathode voltage of −6.5 kV, a maximum working pulse width of 2 ms, and a peak power of 1600 W. The joint test with traveling-wave tube shows that the output RF power of TWT is stable during pulse operation. The test results verify the feasibility of the design method.
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Key words:
- miniaturization /
- pulse high voltage power supply /
- TWT /
- SiC diode /
- microwave power module
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表 1 行波管主要电参数
Table 1. Main electrical parameters of TWT
cathode voltage Vk/kV first collector voltage Vc1 second collector voltage Vc2 third collector voltage Vc3 −6.5 (reference ground) 60%|Vk| (reference Vk) 40%|Vk| (reference Vk) 20%|Vk| (reference Vk) 
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表 2 部分元件参数
Table 2. Partial component parameters
R1/kΩ C20/nF C22/nF C23/nF R6/kΩ 100 1 10 1 51
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表 3 收集极电压仿真和实验结果
Table 3. Simulation and experimental results of collector voltage
Vc1 Vc1/Vk Vc2 Vc2/Vk Vc3 Vc3/Vk simulation result 3884 0.597 6 2574 0.396 0 1272 0.195 0 experimental result 3880 0.596 9 2568 0.395 0 1290 0.198 4
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