RU1815780C - Device for control over reversible electric motor - Google Patents

Abstract

Usage: in electric drives, hoisting-and-transport mechanisms, in galvanic lines, etc. The essence of the invention is to improve safety by ensuring the passage of intermediate states only with manual control with simultaneous simplification. The device comprises a contactor with a coil 1 and contacts 2, 3 and 4, a contactor with a coil 5 and contacts 6, 7 and 8, an intermediate relay with a coil 9 and contact 10, a travel switch 11, control buttons 12. 13 and 14, respectively, forward forward, Start back and Stop. The directional switch is located on the working body and interacts with a fixed push-button device. Intermediate states can only be overcome when one of the Start buttons is pressed. 1 ill.

Description

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The invention relates to electrical engineering and can be used in electric drives of various purposes, for example in hoisting-and-transport mechanisms, in galvanic lines, etc.

The aim of the invention is to simplify.

This goal is achieved in that the device for controlling a reversible electric motor, comprising two contactors with a coil, two make and break contacts each, an intermediate relay with a coil and a break contact, one terminal of the coil of contactors and an intermediate relay are combined and equipped with a first clamp for connecting to the mains , the other conclusions of the coils of the contactors through the opening contacts of the opposite contactor are connected respectively to one of the conclusions of the buttons Start forward and Start back and first the findings of the first make contacts of the respective contactors, the other outputs of which are combined and connected through the opening contact of the intermediate relay to the second terminal for connecting to a mains supply, to which the first outputs of the second make contacts of the contactors, the second outputs of which are connected, further comprise a make contact of the limit switch, Sudden conclusions of the Start and Start and Back buttons are connected to the second terminal for connection to the mains supply, the common point of the second terminals of the second circuit lev els of contacts of contactors via make contact commutation switches connected to the other terminal of the coil intermediate relay.

The drawing shows a circuit diagram of the proposed device for controlling a reversible electric motor.

The device comprises a first contactor with coil 1 with NO contacts 2 and 3, NC contact 4, a contactor with coil 5 with NO contacts 6 and 7, NO contact 8, an intermediate relay with coil 9 with NO contact 10, a directional switch with NO contact 11, button 12 Start forward, button 13 Start back, button 14 Stop. The first leads of coils 1 and 5 and the coils of the intermediate relay 9 are combined and equipped with a first terminal 15 for connecting to the mains, the other leads of the coils 1 and B. contactors are connected via contacts 8 and 4 of the opposite contactors to one of the leads 12 of the forward and forward buttons 13 start back

and the first conclusions of pins 2 and 6, the second pins of which are connected via the terminal 10 of the intermediate relay 9 to the second terminal 16 for connection to the mains supply,

to which the second leads of the buttons 12, Start forward and 13, Start back, and the first conclusions of contacts 3 and 7, the second conclusions of which are connected through the make contact 11 of the directional switch to the second output of the intermediate relay coil 9, are connected.

A device for controlling a reversible electric motor operates as follows.

Before starting movement, the directional switch located on the working body of the electric drive is in the closed state (contact 11). Coil 9 of the intermediate relay is de-energized, contact 10 is closed.

When one of the buttons 12 or 13 is pressed, the coil 1 or 5 of the corresponding contactor is turned on, its contacts occupy the opposite position, shown in the drawing, of the intermediate relay coil 9

receives power, pin 10 opens. Drive movement begins. If the Start button is released before the trip switch 11 is released (until its contacts open), it will turn off

electric motor, since the corresponding coil of the contactor will be de-energized. When you release the Start button after releasing the directional switch, the working body moves by one

interval. When the track switch is pressed onto the push-button device, it is not shown in the drawing, its contact 11 closes, the intermediate relay coil 9 receives power, the contact 10 opens and the previously connected coil 1 or 5 of the contactors is de-energized, turning off the drive; and again preparing the motor starting circuit in any direction.

The simplicity of the circuit solution is the advantage and advantage of the proposed technical solution in comparison with the prototype.

Claims (1)

SUMMARY OF THE INVENTION A device for controlling a reversible electric motor, comprising two contactors with a coil, two make and break contacts each, an intermediate relay with a coil and a break contact, one terminal of the coil of contactors and an intermediate relay combined and equipped with a first terminal for connection to the mains, other terminals contactor coils through the opening contacts of the opposite contactor are connected respectively to one of the outputs of the buttons Start forward and Start back and the first conclusions s respective switching contacts of the contactor, the other terminals of which are combined and through an intermediate relay break contact connected to a second terminal for connection to the mains, to which are connected first terminals of the second closing contactor contacts, 0 the second conclusions of which are combined, characterized in that. that, for the sake of simplicity, a make-contact of the limit switch is inserted into it, and the other leads of the Start Forward and Start-Back buttons are connected to the second terminal for connection to the mains, the common point of the second conclusions of the second make contact of the contactors through the make contact of the limit switch is connected to the other output intermediate relay coils.