Cirkuitikz: MOSFET durch Kapazität ersetzen, "Rest bleibt gleich"

\documentclass{article} 
\usepackage[utf8]{inputenc} 
\usepackage[siunitx,european,fetbodydiode,smartlabels]{circuitikz} 
\usetikzlibrary{positioning} 
\begin{document}

\begin{figure}   % Generalized diagram of different components inside an AC drive with voltage intermediate circuit % Based on a template by % Author: Erno Pentzin (2013), http://www.texample.net/tikz/examples/ac-drive-components/

% Based on a template by Erno Pentzin (2013), http://www.texample.net/tikz/examples/ac-drive-components/; based on suggestions from tex.stackexchange, https://tex.stackexchange.com/questions/395535/some-help-with-connections-and-voltage-arrow-in-circuitikz#395561

\begin{circuitikz}[lbl/.style = {label={[label distance=4mm]above right:#1}}] % this line defines a new style to alter the distance of labels, mosfets due to diode and transformer label
    \draw 
    % top part of switch legs
    (0,0) coordinate (s1) 
    to ++ (0,-0.4)       
    %node (mosfet1) [nigfete,below,anchor=D] {$Q_1$} % old, label distance incorrect
    node (mosfet1) [nigfete,below,anchor=D,lbl=$Q_1$] {} % new, label distance ok
    (mosfet1) node (mosfet3) [nigfete,right=10mm,lbl=$Q_3$] {} % This is the only variable that needs to be changed to adjust the distance from Q1/Q2 to Q3/Q4
    (mosfet1.S) to [short,current/distance =
0.1,i=$i_{L_{Q_1}}$,-*] ++ (0,-0.4) coordinate (t1)

    % transformer
    (t1 -| mosfet3.S) coordinate (hilf1) % Connect Q1 with Q3S which is electrically wrong, but easier to draw

    node (T) [transformer core,below right=0mm and 17mm]{} % This is the only variable that needs to be changed to adjust the distance from Transformer T from node t1 (underneath Q1)
    (T.base) node[label=above:$N_1\quad  N_2$]{}
    node[circ] (E) at ($(T.A1)+(0.35,-0.35)$) {} % Wicklungssinn T
    node[circ] (F) at ($(T.B1)+(-0.35,-0.35)$) {} % Wicklungssinn T

    % bottom part of switch legs
    (mosfet3.S |- T.A2)                             coordinate (t2)  % likewise counter intuitive
    to ++ (0,-0.4) 
    node (mosfet4) [nigfete,below,anchor=D,lbl=$Q_4$] {}
    (t1 |- mosfet4.D)   node (mosfet2) [nigfete,below,anchor=D,lbl=$Q_2$] {}

    % connection lines origins at transformer
    %(T.A1) to                       (t1) % old, replaced by short b/c current arrows, see below
    (t1) to [short,current/distance = 1,i=$i_1$] (T.A1)
    (T.A2) to [short,-*]            (t2)
    (T.B1) to [short]                ++ (0.5,0)     coordinate (t3)            
    (T.B2) to [short]                ++ (0.5,0)     coordinate (t4)

    % connection lines orign at mosfet
    (t1)        to      (mosfet2.D)
    (mosfet2.S) to ++   (0,-0.4)                    coordinate (s2)
    (mosfet3.D) to ++   (0, 0.4)                    coordinate (s3)
    (mosfet3.S) to      (mosfet4.D)
    (mosfet4.S) to ++   (0,-0.4)                    coordinate (s4)

    % supply lines
    (s3) -- (s1) to [short,*-] ++(-1.5,0) coordinate (czk+) to [short,*-o] ++ (-0.75,0)           coordinate (s+) % added *-o, * to get dot at S1
    (s4) -- (s2) to [short,*-] ++(-1.5,0) coordinate (czk-) to [short,*-o] ++ (-0.75,0)           coordinate (s-) % added *-o, * to get dot at S2
    % (s+) to [open, v=60<\volt>, invert] (s-) % old, with SI unit
    (s+) to [open, v=$U_{in}$, invert] (s-) % new, with variable U_in

    % secondary side dc rectifier
    (t3) to[short,current/distance = -1.5,i=$i_2$,-*] ++(0.35,0) coordinate (AA) % move transformer outlet a bit to the right
    (t4) to[short,-*] ++(1.85,0) coordinate (BB)    % move transformer outlet a bit to the right

    (AA) to [Do,name=d1,l=$D1$] ++(0,1.5) to[short,-*] ++(1.5,0)                    coordinate (c1)

    (AA) -- (AA |- BB) to [Do,invert,name=d2,l_=$D2$] ++(0,-1.5) to[short,-*] ++(1.5,0) coordinate (c2)
    (BB) -- (BB |- AA) to [Do,name=d3,l=$D3$](c1)
    (BB) to [Do,invert,name=d4,l_=$D4$](c2)

     % missing C_ZK inserted

     (czk+) to [C,l=$C_{ZK}$] (czk-)

     % missing L_m insterted

    (hilf1) ++ (1,0) coordinate (hilf2)
    (t2) ++ (1,0) coordinate (hilf3)
    (hilf2) to[L,l_=$L_m$,-*,current/distance =
0.45,i=$i_{L_m}$,*-*] (hilf3)

     % secondary side, L, C, out

     (c1) to[L,l_=$L$,-*,i_=$i_L$,v^=$u_L$]
++(3,0) coordinate(c3) to[short,i=$i_{out}$,-o] ++(0.75,0) coordinate (out1)
     (c3) to[C,l_=$C$,i=$i_{C}$,-*] (c3 |- c2) coordinate (c4) -- (c2)
     (c4) to[short,-o] ++(0.75,0)  coordinate (out2)

     % voltage arrows primary

     ($(T.A1)+(0.35,0)$) to [open,v=$u_1$] ($(T.A2)+(0.35,0)$)

     % voltage arrows secondary
     (out1)   to[open, v^=$U_{out}$]    (out2) % delete later, voltage arrow
     %(c1) to[open,v^=$u_L$] (c3) % optional instead voltage arrow of L, from c1 to c3
     ($(c1)+(0.35,0)$) to[open,v^=$U_{GR}$] ($(c2)+(0.35,0)$)
     ($(T.B1)-(0.35,0)$) to [open,v^=$u_2$] ($(T.B2)-(0.35,0)$)

     ;
    \end{circuitikz}

    \caption[Ersatzschaltbild]{Ersatzschaltbild} \label{fig:ersatzschaltbild}
  \end{figure}
\end{document}