UNIT AND SYSTEM FOR CONTROL

摘要

PURPOSE: To provide the control unit which is improved in usability by, for example, performing complementary PWM output enabling 0 100% duty output and the control system which uses it. CONSTITUTION: This system is provided with two up counters and two down counters which have a time difference corresponding to a dead time, and those are made to count up and down between a lower-limit value and an upper-limit value (1/2 period plus the dead time); and the up counter which counts a relatively large value and the down counter which counts a relatively large value cross each other at a count value corresponding to the dead time and the up counter which counts a relatively small value and the down counter which counts a relatively small value are brought into contact with each other at the lower-limit value, thereby enabling vertically symmetrical counting.