Transformer Efficiency Calculator

and

ASR Programmer

 

Transformer Test Bench

 

Transformer Efficiency Calculator was developed using Microsoft Visual Basic 6.0 (VB6) 
and runs on any Windows PC platform.

TRANSFORMER EFFICIENCY CALCULATOR was designed specifically to communicate with the TEKTRONIX TPS 2024B Oscilloscope. To measure electric current in and out of the transformer, two TEKTRONIX A622 AC/DC Current Probes are used. TRANSFORMER EFFICIENCY CALCULATOR is available for free simply by hitting the download button below. I recommend using COMFORT CLIPBOARD PRO to view the captured data screens for easy viewing. Driver file ftd2xx.dll must be located in the Windows\System32.

 

Transformer Efficiency Calculator performs the following calculations:

To compute the Apparent Input Power (VA):
ApparentInputPower = InputVoltage * InputCurrent

To compute the Phase Real Input Power (Watts):
RealInputPower = InputVoltage * InputCurrent * Cos(PHI)

 

To compute the Phase Reactive Input Power (VAR):
ReactiveInputPower = InputVoltage * InputCurrent * Sin(PHI)

 

To compute the Input Phase Angle (Degrees):
PHI = Arccos(RealInputPower / (InputVoltage * InputCurrent))


To compute the Inverse Cosine, Arccos(X):
Arccos(X) = Atn(-X / Sqr(-X * X + 1)) + 2 * Atn(1)

 

To compute the Apparent Output Power (VA):
ApparentOutputPower = OutputVoltage * OutputCurrent 

 

To compute the Phase Real Output Power (Watts):
RealOutputPower = OutputVoltage * OutputCurrent * Cos(PHI2)

 

To compute the Phase Reactive Output Power (VAR):
ReactiveOutputPower = OutputVoltage * OutputCurrent * Sin(PHI)


To compute the Output Phase Angle (Degrees):
PHI2 = Arccos(RealOutputPower / (OutputVoltage * OutputCurrent))


To compute the Inverse Cosine, Arccos(X):
Arccos(X) = Atn(-X / Sqr(-X * X + 1)) + 2 * Atn(1)

 

To compute the Load Resistor Real Output Power (Watts):
ResistorRealOutputPower = (OutputVoltage)2 / LoadResistor

 

To compute the Apparent Power Multiplier (Unitless):
ApparentPowerMultiplier = ApparentOutputPower / ApparentInputPower

 

To compute the Apparent Power Multiplier Efficiency (%):
ApparentPowerMultiplierEfficiency = (ApparentOutputPower / ApparentInputPower) * 100

 

To compute the Phase Transformer Efficiency, (%):
PhaseEfficiency = (RealOutputPower / RealInputPower) * 100

 

To compute the Load Resistor Transformer Efficiency (%):
LoadResistorEfficiency = (ResistorRealOutputPower / RealInputPower) * 100

 

 

ASR PROGRAMMER is a USB Windows app that makes the GW-INSTEK ASR-2100 fully programmable by setting up AC test voltages for the transformer.

 

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