After the controlled variables have been sensed, transduced, and converted to digital signals, the microcomputer makes decisions on what action should be taken based on the user-supplied program. Ultimately a switch will be turned on or off or the position of a valve, damper, variable-speed motor drive, or other modulating regulator will be changed. This chapter concentrates on these “actuators” which exist at the extremity of the control system.
KeywordsStep Motor Line Current Gate Current Computer Control System Rotor Tooth
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