Abstract
Industries have been moved from conventional control to programmable logic control (PLC). System control, protection and maintenance for 3-induction motor have to be used in safe controlling process rather than human continuous control. This paper simulates a PLC control system for three-phase induction motor through Matlab simulation. The motor is driven by a space vector pulse with modulation (SVPWM), a three-phase voltage source inverter through a PLC controller. PLC control can employ speed and current control besides initiating a protection signal for abnormal current, voltage and temperature. Moreover, it can be used as a helpful tool for continuous monitoring of any quantity corresponding to the controlled motor. To emulate the control program in Matlab/Simulink software, a translation approach is used. It translates the PLC control program into m-file function block. The results reflect a successful PLC translation control through the results of speed, current and torque during load and no-load conditions.
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