Stretch film packaging electrical interlocking control of parsing

Stretch film packaging electrical interlocking control of parsing. In the electric control automatic stretch film packaging, self-locking and interlock are collectively referred to as electric interlocking control, can be widely applied in the automatic vacuum packaging machine.

a, stretch film packaging electrical interlocking control of parsing the single-phase continuous operation of the motor control circuit.

the stretch film vacuum packing electrical control circuit is a typical use of the latching contactor to realize continuous operation of electrical control circuit, when the power switch on the Qs, press the start button SB1, stretch film in vacuum packaging machine control circuit contactor coil KM to electricity, the armature and contactor, closes the normally open contacts of contactor, the winding of the motor power, the total pressure of the motor starts, at this time although SB1 release button, but still the contactor coil electricity, motor function, the use of stretch film vacuum packaging machine relay or contactor's own auxiliary contacts to keep its coil electricity phenomenon is called the self-locking, also called self-preservation. Motor stops, the only need to press the button SB2, coil circuit disconnect, armature reset, the main circuit and self-locking circuit are disconnected, the motor stop losing electricity, also known as the circuit & other; Rev. - Bao stop & throughout; Circuit.

2, stretch film packaging electrical interlocking control of analytical with interlock of three-phase asynchronous motor and reversing control circuit.

in the practice of the automatic vacuum packaging machine production, there are a lot of need motor and reversing operation, such as clamping fixture and loosen, lifting and lowering of elevator etc.

to change the automatic vacuum packaging machinery motor steering, only need to change the phase sequence of three-phase motor, that is, any two of the three-phase motor winding phase commutation. KM1 is forward contactor, KM2 is reversing contactor. When SB1 button SB1 normally open contacts connected, KM1 coil electricity, KM normally open contacts closed self-locking, normally closed contact of KM1 KM2 of coil cannot access to electricity, electric motor is running.

when the push button SB3 make the motor stop, then push button SB2, normally open contacts through to SB2, KM2 coil electricity, normally open contacts closed self-locking KM2, electric motor reverse running, KM2 normally closed contacts make KM1 coil can not access to electricity. If you don't use KM1 KM2 and normally closed contacts, so when SB1 and SB2 press at the same time, the motor winding short circuit happens, so any time only allow a contactor. In order to adapt to the requirements, when pressing the forward button, KM1 electricity, KM1 KM2 from electricity. Similarly, KM2 electricity, KM2 make KMI not electricity, constitute the restrict relationship is called the interlock.

using the contactor automatic vacuum packaging machine appliances such as relays, the normally closed contact of the interlock is called electric interlock. The push button SB1's turn, SB3 button again after make the motor stop. Press the button SB2 just inversion of control circuit is called & other; Stops right throughout the &; Circuit, this kind of stretch film packaging machinery road is typical.

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