Quote:
Originally Posted by techhelpbb
It doesn't actually connect to the circuit it merely robs some of the magnetic field around the wire
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Well, it actually
is connected to the circuit, albeit inductively via the transformer formed by the lead wire and the coil wrapped around it.
Since the current to the motor may contain a large ripple under various operating conditions due to the interaction of the speed controller PWM switching, the motor inductance, and the motor commutation, there may be some issues involved in interpreting the measurements.