Summary:
this thesis is applicative design of three-phase induction motor control in processing of special industrial equipment by using the C20p PLC produced by OMRON Company,Japan. It stressly designs 3 kinds of controlling methods of the three-phase induction motor: motor turns controlling method ;motor Y-D start-up controlling method and three-phase induction motor time controlling method with control ladder diagrams and the input and output wiring diagram of the procedures.
key words: three-phase induction motor; PLC ladder diagram; Programmer.
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