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