如何在电路中添加箭头并改变电压源的方向

Question

这是代码。

\documentclass[12pt,letterpaper]{article}    
\usepackage[left=20mm,top=30mm,bottom=30mm,right=20mm]{geometry}

\usepackage[siunitx]{circuitikz} % circuit package and  include electrical units in our labels


\begin{document}

\begin{center}
\tikzstyle{arrow}=[draw, -latex]
\begin{circuitikz} [american voltages, american currents] \draw
  (5,0) to [capacitor, a = $C_1$] (5,3) --
  (2,3) to [inductor, a^ = L, mirror]  (-1,3) to [capacitor, a^ = $C_2$, name=C2] (-1, 1.8) 
  to [V, l = $\frac{V_{\pi}} {s}$]
  (-1,0) -- (1,0) -- (3,0) -- (5,0)
  

  (3.5,3) to  [R,  l = R] (3.5,0)

;

            
\end{circuitikz}
\end{center}

\end{document}

这是我从这段代码中获得的。

但是，我想要下面这样的东西。我想在电路中添加箭头并改变电压的方向。

Answer 1

对于生成器，只需添加invert其选项。

对于电流，您可以使用添加电流箭头及其标签来代替(-1,0) -- (1,0)底部导线中的 普通线条...(-1,0) to[short, i=$I(s)$] (1,0)

我在下面的代码中添加了更多注释。

\documentclass[12pt,letterpaper]{article}
\usepackage[left=20mm,top=30mm,bottom=30mm,right=20mm]{geometry}
\usepackage[siunitx]{circuitikz}

\begin{document}

\begin{center}
% notice that this style (which is in the old, deprecated format)
% will NOT affect circuitikz, where arrows are shapes (mostly)
% \tikzstyle{arrow}=[draw, -latex]
% the correct (modern) way is
\tikzset{arrow/.style={draw, -latex}}
%
\begin{circuitikz} [american voltages, american currents] \draw
  (5,0) to [capacitor, a = $C_1$] (5,3) --
  (2,3) to [inductor, a^ = L, mirror]  (-1,3) to [capacitor, a^ = $C_2$, name=C2] (-1, 1.8)
  to [V, l = $\frac{V_{\pi}} {s}$, invert] % CHANGED: use "invert"
  % CHANGED: use to[short...] to add currents (and flows, poles, etc.)
  (-1,0) to[short, i=$I(s)$] (3,0) -- (5,0)
  (3.5,3) to  [R,  l = R] (3.5,0)
;
\end{circuitikz}
\end{center}

\end{document}

如果你想改变当前方向，你可以使用

to[short, i<=$I(s)$] 

>或者使用、<、_、四个组合^来选择方向和标签位置，如手册中“电流：”部分所述

在当前的情况下，组件为short，箭头位于路径的中心，因此前四个选项和后四个选项基本等效。

Answer 2

尝试一下这个代码。

\documentclass[12pt,letterpaper]{article}    
\usepackage[left=20mm,top=30mm,bottom=30mm,right=20mm]{geometry}

\usepackage[siunitx]{circuitikz} % circuit package and  include electrical units in our labels

\begin{document}
    
    \begin{center}
        \tikzstyle{arrow}=[draw, -latex]
        \begin{circuitikz} [american voltages, american currents]
             \draw(5,0) to [capacitor, a = $C_1$] (5,3) -- (2,3) to [inductor, a^ = L, mirror]  (-1,3) to [capacitor, a^ = $C_2$, name=C2] (-1, 1.8) 
            to [V, invert, l = $\frac{V_{\pi}} {s}$]
             (-1,0) -- (1,0)  -- (3,0) -- (5,0)
                (3.5,3) to  [R,  l = R] (3.5,0) ;
                    \draw[->] (-1,0)--(0.5,0);  % add an arrow inline   
        \end{circuitikz}    
    \end{center}    
\end{document}