Study on load current with double inductive pulsed power supplies
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摘要: 轨道炮的发射需要幅值足够大脉宽足够宽的梯形波电流。研究了两个电感型脉冲电源模块给同一负载供电时的三种工作模式，在不同的工作模式下，负载的电流放大倍数和脉宽增值不同。由实验和仿真结果知: 两个STRETCH meat grinder电源模块在相同模式下工作时，负载电流放大倍数最大，脉宽增值最小。在主管同开同断且晶闸管延时的模式下工作时，脉宽增值最大，电流放大倍数最小。以第二模块延时第一模块的模式工作时，负载电流的放大倍数和脉宽增值都是居三模式之中，因此可通过选取合适的触发方式获得所需要的负载电流。
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关键词:
- STRETCH meat grinder /
- 电流放大倍数 /
- 脉宽增值
Abstract: The launching of the railgun needs enough amplitude and width trapezoid wave current. This article presents three working modes of two inductive pulsed power supplies supplying one load. The load current magnification and the pulse width increment are different under these three different working modes. Simulation and experiment results show: the load current magnification is the largest and the pulse width increment is the smallest when two STRETCH meat grinder modules work at the same mode; the load current magnification is the smallest and the pulse width increment is the largest when the main switches of two STRETCH meat grinder modules open simultaneously and the thyristor of the second model delays the first one; the load current magnification and the pulse width increment is medium when the second model delays the first model. From the results we can get the right current by choosing the appropriate triggering.-
Key words:
- STRETCH meat grinder /
- the current magnification /
- pulse width increment
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图 2 两个STRETCH meat grinder模块单充并放原理图
Figure 2. Principle of two STRETCH meat grinder modules under the mode of separate charge and parallel discharge
图 3 两个模块在相同模式工作下负载电流波形图
Figure 3. Load current of two STRETCH meat grinder modules work under the same mode
图 4 两个模块在主管同开同断晶闸管延时下给负载供电的负载电流波形图
Figure 4. Load current of two modules work under the mode of the main switches opening simultaneously and thyristors delaying each other
图 5 两个模块在第二模块延时第一模块下的负载电流波形图
Figure 5. Load current with the second module delays the first module
表 1 仿真和实验参数
Table 1. Parameters of simulation and experiment
power supply module pulse capacitance/mF first inductance coil/μH second inductance coil/μH coupling coefficient conversion capacitor/μF load inductance/μH simulation discharge resistance/mΩ the first module 2.60(6 kV) 43.1(6.9 mΩ) 12.4(3.0 mΩ) 0.908 800 1.0(1.0 mΩ)
0.5(0.6 mΩ)1.3 the second module 2.61(6 kV) 43.1(5.7 mΩ) 12.7(2.8 mΩ) 0.891 800 1.0(1.0 mΩ)
0.5(0.6 mΩ)1.1 
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表 2 两个模块在相同模式下仿真和实验结果比照表
Table 2. Simulation and experimental results of two modules work under the mode
maximum load current generated bymodule 1/A maximum load current generated by module 2/A total maximum load current/A experiment 576 576 1150 simulation 576 580 1156
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表 3 两个模块在主管同开同断晶闸管延时下仿真和实验结果比照表
Table 3. Comparison of simulation and experimental results with two modules work under the mode of the main switches opening simultaneously and thyristors delaying each other
maximum load current generated by module 1/A maximum load current generated by module 2/A total maximum load current/A experiment 1920 1920 2800 simulation 1986 1804 2844
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表 4 两个模块在第二模块延时第一模块下的仿真和实验结果比照表
Table 4. Comparison table of the simulation and experimental results with the second module delays the first module
maximum load current generated by module 1/A maximum load current generated by module 2/A the total maximum load current/A experiment 1536 1680 2440 simulation 1492 1710 2227
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表 5 三种工作模式下仿真结果比较
Table 5. Comparison simulation results with three different working mode
working mode of two modules load current amplitude magnification half of the peak current generated by a single module/A pulse width increment/ms the same mode 2.00 250 0.3 main switches with the same operation and the thyristors delay each other 1.43 800 1.0 the second module delays the first module 1.49 950 0.6
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