SU25533A1 - Device for electromagnetic control of electric motors - Google Patents

Description

The present invention consists in the structural design of a device intended to switch on and switch the current in electric motors, for example, three-phase motors, at various machines that require a change in the direction of rotation during their work, and the switching and switching on of the current is carried out using buttons machine tool.

In FIG. 1 is a top view of the device with the cover removed; FIG. 2 shows it from the top with a detached board with contacts; Fig., 3-wiring diagram.

On the board (Fig. 1), made of an insulating material, there are copper contacts 2 and 3, and plates 4 of an insulating material. The contacts slide the brushes 5, which are used to connect the contacts 3 n 2. The brush holder b is a funnel stamped from iron, with iron boxes 7 attached to it at an angle of 120 ° to each other electrically insulated from the funnel 6. Brushes 5 are inserted into these boxes.

The contacts are spring 8 :. Clamps (ten in number) are also mounted on board 1 for connection with the line, motor, and buttons. The funnel 6 is connected by means of a screw 9 with a steel plate 10 having a trapezoid appearance. This steel plate 10 is seated on an axis passing through a hole in the center of the frame of electromagnets 11 ,. whereby it can be turned horizontally. Three pairs of electromagnets 11 arranged at an angle of 120 ° have a common rm 12 mounted on the base 13. The anchors 14 of the electromagnets are connected pivotally to the rome, which gives them the opportunity to move with the help of a spring 15, and are equipped with angular steel spikes 16. When attracted the core of the electromagnet-process 16 is pressed against the corresponding side of the plate 10 and thereby causes the latter to turn sharply, and this makes the brush holder fastened to it rotated and the brushes move along the contact plates, and therefore on chenie and switching current. Thus, in the proposed device, as follows from the electrical

circuit (Fig. 3), the winding of the electromagnets is under the current only at the time of turning the switch.

To protect the mechanism from dust and dirt, the housing 17 serves.

The subject of the patent.

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Device for electromagnetic control by electric motors

characterized in that in order to limit the switching time of electromagnets on the network, three electromagnets are used, arranged at an angle of 120 to each other and intended to rotate through one korea 16 to one side or the other of the trapezoidal bar between the electromagnets and the motor attached to the switch .