How to wire two limiters for motor forward and reverse rotation

Refer to the wiring diagram below:

Forward and reverse motor rotation, which stands for clockwise rotation and counterclockwise rotation of the motor. Clockwise rotation of the motor is motor forward rotation, and counterclockwise rotation of the motor is motor reverse rotation.

Forward and reverse control circuit diagram and its principle analysis to realize the motor forward and reverse as long as connected to the motor three-phase power supply into any two-phase adjustable wiring can be achieved to reverse the purpose.

Forward and reverse motor in a wide range of uses, such as traveling cars, woodworking with electric planer, table drill, carving machine, drying machine and lathe.

Expanded information:

Along with the birth of the contactor, the forward and reverse circuits of the motors were also further development. It can be more flexible and convenient to control the forward and reverse of the motor, and the protection circuit is added to the circuit - interlock and double interlock. Low voltage and long distance frequent control can be realized.

Forward and reverse rotation of the motor along with the development of electronic technology, the successive emergence of PLC, microcontroller and other further circuit improvements. And in the actual application of the circuit to increase the number of proximity switches, photoelectric switches, etc. to realize the two-way automatic control, laying the foundation for the development of industrial robots.

In order to make the motor can be positive and reverse rotation, two contactors KM1, KM2 can be used to switch the motor three-phase power supply phase sequence, but the two contactors can not be absorbed at the same time, if at the same time will cause the power supply short-circuit accidents, in order to prevent such accidents in the circuit should be taken in a reliable interlocking, the above figure for the use of the buttons and contactors double interlocking the motor positive and negative two-direction operation of the control circuit. The above figure shows the control circuit using the button and contactor double interlocking motor running in both directions.

Baidu Encyclopedia - Motor Forward and Reverse