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electrical_engineering_and_electronics_1:block03 [2025/09/28 23:32] – [Learning objectives] mexleadminelectrical_engineering_and_electronics_1:block03 [2025/09/29 01:01] (aktuell) – mexleadmin
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 </callout> </callout>
  
-==== Efficiency ==== 
- 
-The usable (= outgoing) $P_{\rm O}$ power of a real system is always smaller than the supplied (incoming) power $P_{\rm I}$.  
-This is due to the fact, that there are additional losses in reality. \\ 
-The difference is called power loss $P_{\rm loss}$. It is thus valid: 
- 
-$P_{\rm I} = P_{\rm O} + P_{\rm loss}$ 
- 
-Instead of the power loss $P_{\rm loss}$, the efficiency $\eta$ is often given: 
- 
-$\boxed{\eta = {{P_{\rm O}}\over{P_{\rm I}}}\overset{!}{<} 1}$ 
- 
-For systems connected in series (cf. <imgref BildNr23>), the total resistance is given by: 
- 
-$\boxed{\eta = {{P_{\rm O}}\over{P_{\rm I}}} = {\not{P_{1}}\over{P_{\rm I}}}\cdot {\not{P_{2}}\over \not{P_{1}}}\cdot {{P_{\rm O}}\over \not{P_{2}}} = \eta_1 \cdot \eta_2 \cdot \eta_3}$ 
- 
-<WRAP> 
-<imgcaption BildNr23 | Power flow diagram> 
-</imgcaption> 
-{{drawio>Leistungsfluss.svg}} 
- 
-</WRAP> 
- 
-~~PAGEBREAK~~ ~~CLEARFIX~~ 
 ==== Passive vs. active sign convention ==== ==== Passive vs. active sign convention ====