text: <s>[INST] Meaning of Displayed current value on VFD Hi, I'm using PowerFlex40 VFD to drive a 3 phase induction motor. I have a basic doubt. In VFD display parameter d003 output current is shown. Now My question is which is this current. I can connect motor in STAR or DELTA configuration and current will be different in both the cases (I mean Phase and Line current values). Also there are three windings U,V and W in motor. So is it the case that VFD is delivering same current to all 3 Motor windings (just 120 degree apart ) and it is that current ? Also is this the RMS or PEAK or AVERAGE current ? [/INST] Hello, d003[Output Current] is the total output current present at terminals T1, T2 and T3 of the drive, as measured and calculated by the internal drive circuitry. The total output current can be defined as: where Torque Current is the amount of current in phase with the fundamental voltage component and Flux Current is the amount of current that is out of phase with the fundamental voltage component. Torque Current and Flux current are not available from the PowerFlex 40 drive (there are other drives from the Rockwell portfolio that provide feedback on Torque Current and Flux Current via read only parameters). It is expected the value of parameter d003 [Output Current] to be different depending on the internal arrangement of the motor windings (STAR or DELTA). Those values should be in accordance with the relevant formulae for voltage and current in typical Start and Delta motor connections. Please note that the drive will not be aware of how the motor windings are internally connected. The drive will be able to provide an output voltage up to the same level as the supply voltage (the drive will not be able to provide more voltage out than the voltage coming in). It is important to check the specifications of the motor to make sure that the motor windings in the desired connection (STAR or DELTA) are rated and capable of withstanding the output voltage provided by the drive. The inverter section of a variable speed drive does not produce sinusoidal voltage waveform, but rather a series of voltage pulses created from the DC bus, also known as PWM (Pulse Width Modulation). More information on this can be checked via this document Induction Motor Winding Voltage and Inverter Drive Output Voltage Relationship Those voltage pulses will be applied to the motor windings and there will be a flow of current from the drive output terminals T1, T2 and T3 through the inductance of the motor windings. The value of parameter d003 [Output Current] is provided in Amps with two decimal places. This value is filtered by the internal electronics of the drive and is an averaged value of the real time PWM current waveform. \\n </s>