Design of high power density inverter-type high voltage power supply module
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摘要: 为解决中性束注入系统中加速极高压电源输出电压纹波低、打火时高压电源输出能量低、打火快速关断的需求，以及高压打火可能损坏高频开关器件的问题，采用模块化逆变式电源模块方案，设计了120 kV/80 A模块化大功率逆变式高压电源，该电源将84个
1600 V/80 A的高频逆变式模块化电源错相级联。高频逆变式电源模块通过变压器隔离，可在打火时有效保护开关器件；采用逆变频率20 kHz的错相控制，在保证电压纹波的同时还可减小滤波电容的容量，满足打火能量限制的要求。最后仿真并搭建样机对模块性能进行测试，模块上升时间为67 µs；打火关断时间为3.3 µs；打火释放能量为1.3 J；电压纹波为3.3%，经交错级联后模块可以满足纹波低于1%。结果表明该设计满足电压纹波低、快速关断、低打火释放能量的要求，验证了设计方案的可行性。Abstract: To address issues of low output voltage ripple, low ignition energy, rapid shutdown, and to reduce the risk of high-voltage ignition damaging high-frequency switching devices in neutral beam injection systems, this paper proposes a modular inverter-type power supply design. A 120 kV/80 A high-power modular inverter is developed. It incorporates 84 high-frequency inverter modules (1600 V/80 A each) in a staggered-phase cascade. Transformer isolation of each module safeguards switching devices during ignition, and 20 kHz staggered phase control minimizes filter capacitor requirements while maintaining voltage ripple within specifications. Performance tests on the prototype show a rise time of 67 μs, turn-off time of 3.3 μs, ignition energy release of 1.3 J, and voltage ripple of 3.3%, with the ripple reduced to less than 1% after interleaving. The results demonstrate that the design achieves low voltage ripple, fast shutdown, and controlled energy release, confirming its feasibility-
Key words:
- high voltage power supply /
- modularization /
- high frequency /
- misalignment /
- low ripple
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图 1 120 kV高功率密度逆变式高压电源主回路设计图
Figure 1. Main circuit design of 120 kV high power density inverter-type high voltage power supply
图 2 高功率密度逆变式高压电源模块方案设计
Figure 2. Scheme design for high power density inverter-type high voltage power supply module
表 1 模块基本参数指标
Table 1. Basic parameter specifications of the module
rated input voltage/V rated output voltage/V nominal power/kW switching frequency/kHz output voltage ripple short circuit protection time/µs 600 (three-phase) 1600 (DC)128 20 5% ≤10 
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表 2 仿真参数
Table 2. Simulation parameters
resonant inductance/nH resonant capacitor/µF switching frequency/kHz ratio of transformer filter inductance/μH filter capacitor/µF 40 2.2 20 0.4 50 1
下载: 导出CSV
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