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Home : Support : Online Help : MapleSim : MapleSim Component Library : Electrical : Analog : Sources : Current : Trapezoid Current

Trapezoid Current

Trapezoidal current source

Modelica Standard Library

	Description
	The Trapezoid Current source generates a periodic trapezoidal waveform.

	Equations
	$i = i_{p} = - i_{n} = I_{0} + I_{h} {\begin{array}{c} 0 & t' < 0 \\ \frac{t'}{T_{r}} & 0 \leq t' < T_{r} \\ 1 & T_{r} \leq t' < T_{r} + T_{w} \\ \frac{T_{r} + T_{w} + T_{f} - t'}{T_{f}} & T_{r} + T_{w} \leq t' < T_{r} + T_{w} + T_{f} \\ 0 & otherwise \end{array}$ $t' = t - T_{0} - k T, k = \{0, 1, \dots, n - 1\}$ $v = v_{p} - v_{n}$

Variables

Name	Units	Description	Modelica ID
$v$	$V$	Voltage drop between the two pins	v
$v_{x}$	$V$	Voltage at pin $x$ , $x \in \{n, p\}$	x.v
$i$	$A$	Current flowing from pin $p$ to pin $n$	i
$i_{x}$	$A$	Current into pin $x$ , $x \in \{n, p\}$	x.i

Connections

Name	Description	Modelica ID
$p$	Positive pin	p
$n$	Negative pin	n

Parameters

Name	Default	Units	Description	Modelica ID
$n_{period}$	$−1$		Number of periods; negative means infinite number of periods)	nperiod
$T_{0}$	$0$	$s$	Time offset	startTime
$T_{r}$	$0$	$s$	Rising duration of trapezoid	rising
$T_{w}$	$0.5$	$s$	Width duration of trapezoid	width
$T_{f}$	$0$	$s$	Falling duration of trapezoid	falling
$T$	$1$	$s$	Time for one period	period
$I_{h}$	$1$	$A$	Amplitude of trapezoid	I
$I_{0}$	$0$	$A$	Current offset	offset

	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

Current Sources

Electrical Library

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