The function of a reverse switch is to connect and disconnect a power source or load, which will cause the motor to rotate in either forward or reverse. It is mainly used to manufacture electrical components for forward and reverse rotation of single-phase and three-phase motors, but cannot be used as an automation component.
Single-phase asynchronous motors are common because they require only single-phase alternating current, are easy to use, are widely used, and have the advantages of simple structure, low cost, low noise, and low interference with radio systems. It is used for household appliances and low power small power machines. Media, such as electric fans, washing machines, refrigerators, air conditioners, range hoods, electric drills, medical equipment, small fans and household water pumps.
Extended informationThree-phase power supply to provide a rotating magnetic field, so that the three-phase motor rotation, due to the power supply three-phase connection is different, the magnetic field can be clockwise or counterclockwise rotation, in order to change the direction of rotation, only need to motor power supply of any two-phase phase sequence can be changed to complete. If the original phase sequence is A, B, C, just change to A, C, B or C, B, A.
General reverse switch has two rows of six terminals, phase switching through the middle contact reversal contact, to achieve the purpose of phase change. Take three-phase motor reversing switch as an example: set the incoming A.B.C three-phase, outgoing line is also A-B-C, because ABC three-phase is each 120 degrees apart, connected to a circle, set this circle on the ABC is clockwise, connected to the motor, the motor for clockwise rotation.
If B.C. is switched in the switch, A remains unchanged, so that the switch line becomes A-C-B, then the ABC arrangement on the circumference becomes counterclockwise, after connecting to the motor, the motor rotates counterclockwise, and this switch is the inverted switch.
If you pull the handle to the left, the output line is A-B-C;
If you pull the handle to the center, A-B-C are all disconnected and in the off state;
If you pull the handle to the right, the output line is A-C-B, and the direction of the motor rotates in the reverse direction of pulling the handle to the left.
Baidu Encyclopedia - Single-phase asynchronous motor