| 摘要 |
The invention relates to a teaching model as an automatic system for controlling a three-phase motor. According to the invention, the teaching model comprises a programmable controller (PLC) whereto there are connected five circuits: a safety circuit (CS) which carries out the protection of some components to overcurrents and short-circuits, an emergency stop circuit (COU) which is carried out by a normally-open contact of a button, a power circuit (CF) comprising an automatic switch and fuses, a control circuit (CC) comprising the supplies of an input-output module, the supply of some buttons, the inputs of the controller (PLC), the outputs of the controller (PLC), a communication circuit (CPC) which is responsible for the communications between various components, such as the communication between the controller (PLC) and a converter and the communication between the controller (PLC) and a computer. |
