Vf Controller

Voltage-Frequency Controller

 Description The Voltage Frequency Controller (or Vf Controller) component is a simple Voltage-Frequency Controller. The amplitude of the voltage is linearly dependent ($\frac{{V}_{\mathrm{nom}}}{{f}_{\mathrm{nom}}}$) on frequency (input signal $u$), but limited by ${V}_{\mathrm{nom}}$ (nominal RMS voltage per phase). The output consists of $m$ sine waves with amplitudes as described above, They are intended to feed an m-phase Signal Voltage block. Phase shifts between sine-waves may be chosen by the user; the default values are $\frac{k-1}{m}\mathrm{\pi }$ for $k$ from 1 to $m$.
 Equations ${y}_{k}=A\mathrm{sin}\left(x+{\mathrm{\Phi }}_{k}+{\mathrm{\phi }}_{\mathrm{comm}}\right)$ $A=\sqrt{2}{V}_{\mathrm{nom}}\left\{\begin{array}{cc}\frac{\left|u\right|}{{f}_{\mathrm{nom}}}& \left|u\right|<{f}_{\mathrm{nom}}\\ 1& \mathrm{otherwise}\end{array}$ $\stackrel{.}{x}=2\mathrm{\pi }u$

Variables

 Name Units Description Modelica ID $x$ $\mathrm{rad}$ Integrator state x $A$ $V$ Amplitude of sine wave amplitude $\mathrm{\Phi }$ $V$ m-Vector of phase shifts; set by $\mathrm{orientation}$

Connections

 Name Description Modelica ID $u$ Real input signal; frequency ($\mathrm{Hz}$) u $y$ m-vector of real output signals y

Parameters

 Name Default Units Description Modelica ID $m$ $3$ Number of phases m $\mathrm{orientation}$ [1] $\mathrm{rad}$ Orientation of phases orientation ${V}_{\mathrm{nom}}$ $V$ Nominal RMS voltage per phase VNominal ${f}_{\mathrm{nom}}$ $\mathrm{Hz}$ Nominal frequency fNominal ${\mathrm{\phi }}_{\mathrm{comm}}$ $0$ $\mathrm{rad}$ Common phase shift BasePhase Economy mode $\mathrm{false}$ Economy mode: voltage quadratic dependent on frequency EconomyMode

[1] $-\mathrm{Modelica.Electrical.MultiPhase.Functions.symmetricOrientation}\left(m\right)$

 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.