ThreePhaseTwoLevel_PWMTest of pulse width modulation methods 
This information is part of the Modelica Standard Library maintained by the Modelica Association.
A reference space vector (formed by real part = cosine and imaginary part = sine) of length √2*RMS and frequency 2 Hz is applied. The resulting switching patterns are applied to a threephase twolevel bridge with switching frequency 100 Hz, fed by DC voltage = √2*√3*1 where 1 is the theoretical maximum voltage from terminal to neutral. The resulting voltages with reference to midpoint of the DC voltage are measured.
The RMS of the first harmonic of the first of these voltages is calculated. Please note that the value of the first harmonic is vaild after the first period (i.e. 0.5 s).
Furthermore, these three voltages are transformed to the corresponding space phasor. Note that the zero component is not zero, indicating the shift of the neutral with respect to the midpoint of the DC voltage.
The space phasor is rotated to the coordinate system rotating with 2*π*2 Hz. To suppress the influence of switching, real and imaginary part of the rotated phasor are filtered. The polar representation of this rotated and filtered phasor are calculated.
Please note that the filter has a settle time depending on the filter parameters.
RMS 
Value: 1 Type: Real Description: Reference RMS Y 

cosine 
Type: Cosine 


sine 
Type: Sine 

pwm 
Type: PWM 

multiPhase2Level 
Type: MultiPhase2Level 

dcPos 
Type: ConstantVoltage 

dcNeg 
Type: ConstantVoltage 

ground 
Type: Ground 

potentialSensor 
Type: PotentialSensor 

harmonic 
Type: Harmonic 

toSpacePhasor 
Type: ToSpacePhasor 

rotator 
Type: Rotator 

const 
Type: Constant 

integrator 
Type: Integrator 

filter 
Type: Filter[2] 

toPolar 
Type: ToPolar 