In order that the rotor of the electric motor moves intermittently or abruptly, at least parts of {HEAD ~ at least individual pulses} are blanked by superposition of a pulse interval having {TAIL ~ a zero voltage} 
In order that the rotor of the electric motor moves intermittently or abruptly , at least parts of { HEAD ~ at least individual pulses } are blanked by superposition of a pulse interval having { TAIL ~ a zero voltage }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL