WOLFRAM SYSTEM MODELER
HBridge_TrianglePWM_RLH bridge DC/DC converter with R-L load |
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Diagram
Wolfram Language
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SystemModel["Modelica.Electrical.PowerConverters.Examples.DCDC.HBridge.HBridge_TrianglePWM_RL"]
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Information
This information is part of the Modelica Standard Library maintained by the Modelica Association.
This is the same example as HBridge_RL
but using a triangle (instead of a sawtooth) as pwm reference signal.
This enables an easy sampling of the current in the middle of the pwm period, which delivers with good approximation the mean current:
Compare meanCurrent.y and zeroOrderHold.y.
For discrete or quasi-continuous control it is essential to sample the correct mean current with low effort once during the pwm period.
Parameters (3)
| f |
Value: 1000 Type: Frequency (Hz) Description: Switching frequency |
|---|---|
| R |
Value: 100 Type: Resistance (Ω) Description: Resistance |
| L |
Value: 1 Type: Inductance (H) Description: Inductance |
Components (11)
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hbridge |
Type: HBridge Description: H bridge (four quadrant converter) |
|---|---|---|
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constantVoltage |
Type: ConstantVoltage Description: Source for constant voltage |
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signalPWM |
Type: SignalPWM Description: Generates a pulse width modulated (PWM) boolean fire signal |
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ground |
Type: Ground Description: Ground node |
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currentSensor |
Type: CurrentSensor Description: Sensor to measure the current in a branch |
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voltageSensor |
Type: VoltageSensor Description: Sensor to measure the voltage between two pins |
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meanCurrent |
Type: Mean Description: Calculate mean over period 1/f |
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meanVoltage |
Type: Mean Description: Calculate mean over period 1/f |
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resistor |
Type: Resistor Description: Ideal linear electrical resistor |
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inductor |
Type: Inductor Description: Ideal linear electrical inductor |
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zeroOrderHold |
Type: ZeroOrderHold Description: Zero order hold of a sampled-data system |