According to a textbook that I have, when driving an inductive load with a diode rectifier, the input current becomes distorted. The illustration of the circuit below has the input as an AC source, but the text originally had this circuit as being driven from a transformer if that has anything to do with this.
The circuit (where Vx = E in the waveform diagrams):
The Waveforms (middle is distorted input current).
Further, if the load being driven is highly inductive, the text goes on to describe how the load current will remain almost constant with a small amount of ripple, and the input current will be be like a square wave? For one, how can the load current remain constant while the input is distorted? Here is a illustration from the text:
Can someone explain this?