# Current source and voltage source components

## Introduction

There are two components of source type:

• the current source
• the voltage source

## Current source: definition

A current source is an ideal current source defined by the function current- time I(t) that depends on the physical application, as presented in the table below.

Application Function I(t) Description in Flux

predefined:

I(t) = I0ej(ωt + φ)

Rms value: (Ieff)=(1/ √ 2)I0

Phase: φ

Transient

defined by the user:

I(t) = …

Formula: I(t) = …

## Voltage source: definition

A voltage source is an ideal voltage source defined by the function voltage - time U(t) that depends on the physical application, as presented in the table below.

Application Dependence U(t) Description in Flux

predefined:

U(t) = U0ej(ωt + φ)

Rms value: (Ueff)=(1/√2)U0

Phase: φ

Transient

defined by the user:

U(t) = …

Formula: U(t) = …

## Concerning formulas

The formula that sets the time dependence on the current or on the voltage in a transient application is a formula that comprises:

• constants and I/O (input/output) parameters
• functions (operators, usual mathematical functions, varying functions, …)

Example:

• I(t) = I0Sin(ω.t + φ)
• U(t) = U0Trapez(t, T1, T2, T3)