脉冲变压器锥形高压绕组电压分布实验研究
Experiment of impulse voltage distribution in taper windings of pulse transformer
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摘要: 对脉冲变压器锥形高压绕组进行了脉宽为1 μs，500 ns及100 ns三种不同脉宽的单脉冲实验，研究了不同输入条件下绕组中的电压分布特性，比较了空心、加内铁芯和加内外铁芯三种不同结构绕组中的对地电压及匝间电压的分布曲线。实验结果表明：在高频冲击电压条件下，脉冲变压器锥形高压绕组中的电压呈现非线性分布且存在明显的振荡过程，导致绕组首端的电压梯度增大，伴随脉宽减小电压波形发生明显畸变，冲击电压以波的形式在绕组中传播，从而引起匝间电压按照正弦规律起伏变化，匝间电压的极值通常出现在绕组首末端，加入铁芯有助于抑制电压谐振但同时增大了匝间电压。Abstract: In order to study the impulse voltage distribution in the pulse transformer’s taper windings, experiment was carried out with 3 kinds of single impulse voltage input whose pulse width was 1 μs, 500 ns and 100 ns respectively. Under experimental conditions, turn-to-ground voltage and interturn voltage in the structural windings with air-core and iron-core were compared. The result indicates that the impulse voltage distribution in the coils is nonlinear and oscillates obvious at high frequency, which increases voltage gradients in the head of windings obviously. Distortion also appears as the pulse width decreases. The interturn voltage fluctuates due to the voltage wave transmission. The extremal interturn voltage always appear in either head or end of the windings. To some extent, the i
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Key words:
- pulse transformer /
- voltage resonance /
- multi-conductor transmission line /
- taper winding
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