Modelica.Electrical.PowerConverters.DCDC.Control

Control components for DC to DC converters

Information

Currently there is only one PWM method provided in this library.

Extends from Modelica.Icons.Package (Icon for standard packages).

Package Content

Name	Description
SignalPWM	Generates a pulse width modulated (PWM) boolean fire signal
Voltage2DutyCycle	Linearly transforms voltage to duty cycle

Modelica.Electrical.PowerConverters.DCDC.Control.SignalPWM

Generates a pulse width modulated (PWM) boolean fire signal

Information

This controller can be used both for DC/DC and AC/DC converters. The signal input of the PWM controller is the duty cycle; the duty cycle is the ratio of the on time to the switching period. The output firing signal is strictly determined by the actual duty cycle, indicated as d in Fig. 1.

Fig. 1: Firing (fire) and inverse firing (notFire) signal of PWM control; d = duty cycle; f = switching frequency

The firing signal is generated by comparing the sampled duty cycle input with a periodic saw tooth [Williams2006] or triangular signal (carrier).

Note

The user has the choice between two comparison modes:

commonComparison = true : The result of the comparison dutyCyle > carrier is fed to fire_p, the inverse signal to fire_n.

commonComparison = false: The result of the comparison dutyCyle > carrier is fed to fire_p, the result of the comparison (1 - dutyCyle) > carrier is fed to fire_n. (The result is the same for the comparison dutyCycle > (1 - carrier), i.e. a signal shifted by 180°.)

Extends from Icons.Control (Control icon).

Parameters

Connectors

Modelica.Electrical.PowerConverters.DCDC.Control.Voltage2DutyCycle

Linearly transforms voltage to duty cycle

Information

Transforms the input voltage signal into a duty cycle:

• reciprocal = false and useBipolarVoltage = false: v/VLim = dutyCycle
• reciprocal = false and useBipolarVoltage = true : v/VLim = 2*dutyCycle - 1
• reciprocal = true: v/VLim = 1/(1 - dutyCycle)

Parameters

Connectors