ein paar dimensionierungsüberlegungen für die PSU

dimensionierungen.lyx

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+
+\begin_body
+
+\begin_layout Section
+Ausgangsspannung der PSU:
+\end_layout
+
+\begin_layout Standard
+Richtig dimensionieren weil:
+\end_layout
+
+\begin_layout Itemize
+zu hoch: spannung wackelt, unruhe am verstärker
+\end_layout
+
+\begin_layout Itemize
+zu niedrig: PSU verbrennt unnötig Leistung, Verstärker hat weniger Headroom
+\end_layout
+
+\begin_layout Standard
+Verfügbare Spannung des Trafo: 
+\begin_inset Formula $V_{\sim}\cdot\sqrt{2}=42.42V$
+\end_inset
+
+
+\end_layout
+
+\begin_layout Standard
+Spannungsabfälle unter Volllast (5A):
+\end_layout
+
+\begin_layout Itemize
+2*0.8V Gleichrichterdioden
+\end_layout
+
+\begin_layout Itemize
+2V LM317
+\end_layout
+
+\begin_layout Itemize
+0.7V Basis des Leistungstransistors
+\end_layout
+
+\begin_layout Itemize
+2.84V Hub am Kondensator (
+\begin_inset Formula $5A\cdot10ms/17.6mF$
+\end_inset
+
+)
+\end_layout
+
+\begin_layout Itemize
+Innenwiderstand des Trafos, sagen wir 15% (6.3V)
+\end_layout
+
+\begin_layout Itemize
+Sicherheitsabstand, sagen wir 2V
+\end_layout
+
+\begin_layout Standard
+=> 27V
+\end_layout
+
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