Variable Capacitor - MapleSim Help

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Home : Support : Online Help : MapleSim : MapleSim Component Library : Electrical : Analog : Passive : Capacitors : Variable Capacitor

Variable Capacitor

Ideal linear electrical capacitor with variable capacitance

Modelica Standard Library

	Description
	The Variable Capacitor component models a variable, linear electrical capacitor. The input signal $C$ controls the capacitance; it must be greater than $C_{\min}$ .

	Equations
	$Q = \max (C, C_{\min}) v$ $i = i_{p} = - i_{n} = \overset{&period;}{Q}$ $v = v_{p} - v_{n}$

Variables

Name	Units	Description	Modelica ID
$i$	$A$	Current flowing from pin p to pin n	i
$i_{x}$	$A$	Current into pin $x$ , $x \in \{n, p\}$	x.i
$i_{x}$	$A$	Current into pin $x$ , $x \in \{n, p\}$	x.i
$Q$	$C$	Charge across capacitor	Q
$v$	$V$	Voltage drop across the capacitor	v
$v_{x}$	$V$	Voltage at pin $x$ , $x \in \{n, p\}$	x.v
$v_{x}$	$V$	Voltage at pin $x$ , $x \in \{n, p\}$	x.v

Connections

Name	Description	Modelica ID
$p$	Positive pin	p
$n$	Negative pin	n
$C$	Real input, capacitance in $F$	C

Parameters

Name	Default	Units	Description	Modelica ID
$C_{\min}$	$1 \cdot 10^{−15}$	$F$	Lower bound for variable capacitance, $0 < C_{\min} < C$	Cmin
$IC$	$0$	$V$	Initial voltage	IC
$UIC$	$false$		True (checked) means use $IC$	UIC

	Modelica Standard Library
	The component described in this topic is from the Modelica Standard Library. To view the original documentation, which includes author and copyright information, click here.

See Also

Analog Components

Electrical Library

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