DifferentialAmplifierDifferential amplifier |
This information is part of the Modelica Standard Library maintained by the Modelica Association.
This model demonstrates a differential amplifier to attenuate the input voltage to a level that can be handled by the measurement instrument.
Two sinusoidal source voltages with a phase shift of 120° (e.g., two phases of a three-phase system) feed a load resistor. The voltage at the load resistor has to be measured but is too high for direct measurement.
resistor1.i
and resistor2.i
).resistorGround.i
).
In case this resistance is high, the amplifier's common is floating with respect to the source's common with a high voltage (resistorGround.v
).data |
Value: Type: DifferentialAmplifierData Description: Parameters for source, OpAmp and measurement |
---|
data |
Type: DifferentialAmplifierData Description: Parameters for source, OpAmp and measurement |
|
---|---|---|
sourceVoltage1 |
Type: SineVoltage |
|
sourceVoltage2 |
Type: SineVoltage |
|
resistanceLoad |
Type: Resistor |
|
voltageSensorSource |
Type: VoltageSensor |
|
gain |
Type: Gain |
|
resistorGround |
Type: Resistor |
|
opAmp |
Type: IdealizedOpAmpLimited |
|
resistor1 |
Type: Resistor |
|
resistor2 |
Type: Resistor |
|
resistor3 |
Type: Resistor |
|
resistor4 |
Type: Resistor |
|
positiveSupply |
Type: ConstantVoltage |
|
negativeSupply |
Type: ConstantVoltage |
|
resistanceInstrument |
Type: Resistor |
|
voltageSensor |
Type: VoltageSensor |
|
rootMeanSquare |
Type: RootMeanSquare |
|
ground |
Type: Ground |