The duty cycle of {HEAD ~ this pulse width modulated signal} is increased linearly from a low duty cycle such as 20% to a high duty cycle such as 100% over a time interval which is adjusted to be at least several times the length of the average transition period for closure of {TAIL ~ the contacts} in the contactor 
The duty cycle of { HEAD ~ this pulse width modulated signal } is increased linearly from a low duty cycle such as 20 % to a high duty cycle such as 100 % over a time interval which is adjusted to be at least several times the length of the average transition period for closure of { TAIL ~ the contacts } in the contactor
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH