This information is part of the Modelica Standard Library maintained by the Modelica Association.

This model demonstrates the behaviour of a dimmer with phase-angle control with resistive-inductive load. Note that due to the inductance the current is not zero at the points in time wehre zero-crossing of the voltage occurs, and the triac stays conducting until the current becomes zero.

The reference voltage is prescribed by a trapezoid between zero and full voltage. The voltageToAngle block calculates the necessary phase angle, which is processed by the Signal2mPulse adaptor, applying the firing signals to the triac.

f	Value: 50 Type: Frequency (Hz) Description: Source frequency
Vrms	Value: 110 Type: Voltage (V) Description: RMS source voltage
S	Value: 1000 Type: ApparentPower (V·A) Description: Load apparent power
powerFactor	Value: 0.87 Type: Real Description: Load power factor
ZLoad	Value: Vrms ^ 2 / S Type: Impedance (Ω) Description: Load impedance
RLoad	Value: ZLoad * powerFactor Type: Resistance (Ω) Description: Load resistance
LLoad	Value: ZLoad * sqrt(1 - powerFactor ^ 2) / (2 * pi * f) Type: Inductance (H) Description: Load inductance