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This is represented in the schematic by the X-box. Figure 2. Source: Power Guru. The amplifier runs a current through the coil winding so that the flux in the core sums to zero. This is rather clever as it removes all non-linearities of the core from the performance of the device. It is never driven into saturation if operated within spec and never leaves zero so there are no hysteresis effects either.
The flux cancelling current is fed to the output and will be directly proportional to the primary current. You might want to re-phrase the question. The power will be consumed by the transducer and the load RM. Worst case for the transducer will be with maximum current and voltage drop into minimum RM. Probably not. The datasheet is not very comprehensive so I am guessing a bit.
If it's important: measure! And next to that it will draw I s from the supply "in general". If I s flows out of the device it will be drawn from the positive supply and vv. Together mW. Note that this is the worst case possible, where you continuously measure 50A DC. If you measure sine-shaped or small currents, I s will on average be smaller, and so the average power will drop.
In that case you will need to find the rms value of the current you measure to determine the average power you will need for driving I s. Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Asked 3 years, 8 months ago.
Active 3 years, 8 months ago. Viewed 1k times. Thanks, M. Marko Gulin Marko Gulin 1, 2 2 gold badges 7 7 silver badges 29 29 bronze badges. Active Oldest Votes. What is the total power consumption of the transducer? Transistor Transistor k 9 9 gold badges silver badges bronze badges. I suspect you only care about your power budget in which case your analysis is correct.
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LA55P 50a. Datasheet pdf. Equivalent
LA55P Datasheet PDF