熔断器选型计算器
根据负载电流选择合适的熔断器规格。
V
Ω
Optimal Load Resistance
50.00 Ω
Maximum Power to Load0.5000 W
Efficiency at Max Transfer50%
Optimal Load Resistance vs Thevenin Voltage
公式
## Maximum Power Transfer Theorem Max power is delivered when R_load = R_th. ### Formulas **R_load = R_th** **P_max = V_th^2 / (4 x R_th)** Efficiency is 50% at this point.
计算示例
V_th = 10 V, R_th = 50 ohms.
- 01R_load = R_th = 50 ohms
- 02P_max = 100 / 200 = 0.5 W
- 03Efficiency = 50%
常见问题
Why only 50% efficient?
Equal power is dissipated in source and load when they are matched.
Is max power transfer always desired?
No. Power systems prioritize efficiency. Max power transfer matters in RF and signal work.
AC circuits?
Load impedance should be the complex conjugate of source impedance.
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