🔗 Power Chain Efficiency Calculator

Array-to-load efficiency cascade · required source power · per-stage dissipation

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Chain Stages (source → load)

Blank efficiency = stage skipped. Dissipation is computed for the load power set below.

效率留空 = 跳过该级。耗散按下方负载功率计算。

StageEfficiency (%)In (W)Dissipation (W)

Load

Results

End-to-end efficiency
– %
Required source power
– W
Total dissipation
– W
Active stages
–
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📖 How to use

  1. Pick a preset topology (DET / PPT / CubeSat) or edit the stage list — order runs from the solar array to the load.选一个拓扑预设（DET / PPT / 立方星）或自行编辑各级——顺序从帆板到负载。
  2. Set the load power; the tool works backwards to the required array-side power and each stage's dissipation.设置负载功率；工具反推所需帆板侧功率与各级耗散。
  3. Per-stage dissipation feeds your thermal design — regulators and converters are usually the hot boxes.各级耗散是热设计输入——调节器与变换器通常是热耗大户。
  4. The end-to-end efficiency is what the X_d factor in Solar Array Sizing summarizes — this tool lets you justify that number stage by stage.端到端效率就是帆板工具里 X_d 系数的展开——本工具让你逐级论证那个数。

Power chain topologies

DET (Direct Energy Transfer) connects the array to the bus through a shunt regulator — few series stages, high daylight efficiency, but the array operating point is fixed by the bus.

PPT/MPPT inserts a tracking converter that always loads the array at its maximum power point — better harvest cold/BOL and at varying sun angles, at the cost of one more conversion (~5%).

Chain efficiency is the product of stage efficiencies: η = Π η_i; required source power = P_load/η; stage dissipation = P_in·(1−η_i) at each stage.

All computation runs locally in your browser.

功率链拓扑

DET（直接能量传输）经分流调节器把帆板接到母线——串联环节少、光照期效率高，但帆板工作点被母线钳定。

PPT/MPPT 增加一级最大功率点跟踪变换器，使帆板始终工作在最大功率点——低温/寿命初期及大入射角时收获更多，代价是多一级变换（约 5%）。

链路效率为各级效率之积：η = Π η_i；所需源端功率 = P_负载/η；各级耗散 = P_入·(1−η_i)。

全部计算在你的浏览器本地完成。