SU115812A1 - Push button starter - Google Patents

Description

For iiycxa and stopping asynchronous electric motors with a short-circuited rotor, pushbutton actuators with two self-return control buttons are used, one of which serves to move, using a rail, a moving contact bridge held in the on position by a latch. Another button is designed to release the latch of the slats and then move the contact bridge to its original position.

The described starter is more sophisticated than the known starters of this kind, Taic as it can also be used to control a single-phase asynchronous motor with switchable starting winding.

This is achieved by the fact that the middle contact bridge has a rigid mechanical connection with the start button, which results in the disconnection of the motor starting winding when the button returns to its original position.

FIG. Figures 1 and 2 depict the proposed accelerator .1 accelerator for three-phase and single-phase currents, respectively.

The fixed contacts / actuator are fixed on the base 2, and the movable contacts 3 on the rail 4, which can move along the guiding pin 5. When you press the 6 "button, the start rail 4 moves down until the contacts are completely in contact- At this, the latch 7 releases from the stop into the rail 4, under the action of the spring 5, rotates counterclockwise at some angle around the wasp 9 and stops the rail 4 in the position corresponding to the activation of contacts 1 and 3. When the start button is lowered, it returns to its original position under the action springs 10.

When the button is pressed, the stop latch 7 rotates in the opposite direction and releases the rail 4, which returns to its original position under the action of spring No. 115812, and contacts 1 to 3 open.

The single-phase current starter differs from the three-phase current starter in that after switching on pins 1 and the JO button to start returning to the original position, the middle bridge 13 connected with the button plate 14 is pulled. When the middle contact is broken, the starting winding is disconnected electric motor.

Subject invention

A pushbutton actuator with two self-returning control buttons, one of which serves to move, with the help of a rake, a movable contact bridge held in the on position by a latch, and the second is designed to release the latch of the slats and then move the contact bridge to its original position, which differs In order to use the starter to also control a single-phase asynchronous motor with switchable starting winding, the middle contact bridge has a hard mechanical connection with the start which button is used to achieve the disconnection of the starting winding of the engine during the self-return of the starting button to the initial position

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