稳压二极管稳压器计算器
设计齐纳二极管稳压电路并计算元件参数。
MHz
uΩ-cm
趋肤深度
0.0660 mm
Skin Depth vs Frequency
公式
## Skin Effect **delta = sqrt(rho / (pi x f x mu))** At high frequencies, current concentrates near the conductor surface. The skin depth is the depth at which current density falls to 1/e (37%) of the surface value. Copper at 1 MHz: skin depth is about 0.066 mm.
计算示例
Copper at 1 MHz.
- 01rho = 1.72e-8 ohm-m
- 02mu = 4pi x 1e-7 H/m
- 03delta = sqrt(1.72e-8 / (pi x 1e6 x 4pi x 1e-7))
- 04delta = 0.066 mm
常见问题
Why does skin effect matter?
At high frequencies, effective wire area decreases, increasing AC resistance. RF designers must account for this.
How to mitigate skin effect?
Use Litz wire (many thin insulated strands) or hollow conductors for RF applications.
Does skin effect occur at 60 Hz?
Yes, but skin depth in copper at 60 Hz is about 8.5 mm, only affecting very large conductors.
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