RU1793487C - Transformer - Google Patents

Abstract

Usage: in electrical engineering. SUMMARY OF THE INVENTION: a transformer comprises a core 1 and frames 2 and 3 of the same axial length with primary and secondary windings. The frames are inserted into each other and put on the core. The frame 2 has a образ-shaped form; the frame 3 has a Г-shaped. 1 ill.

Description

The invention relates to electrical engineering, in particular to transformers for powering medical devices, and can serve to ensure electrical safety and withstand high voltages.

A device is known comprising a power transformer with a primary winding, a shield winding, a secondary winding and a voltage divider.

The disadvantage of this device is the increase in the dimensions and weight of the transformer due to structural gaps filled with a semi-rigid curable insulating compound.

The closest in technical essence and the achieved effect to the proposed one is a device containing concentric windings, each of which is placed on a single-flange frame made of insulating material, and the winding chambers of two adjacent frames have different axial lengths. Between successive windings are insulating strips.

A disadvantage of the known device is that the axial length is different

winding chambers leads to an increase in the size and weight of the transformer.

The purpose of the invention is to reduce the size and weight of the transformer by changing the design of the winding frames.

This goal is achieved in that in the transformer for powering medical devices containing a core with primary and secondary windings located on it, the primary and secondary windings are located on frames having the following forms: one of the frames is shaped

forms, and another 4 g-shaped, and the gaps between the flanges of the frames are filled with varnish or compound.

The drawing schematically shows the proposed transformer.

The transformer contains a core 1 and frames 2 and 3 of the same axial length with primary and secondary windings. The space between the flanges is filled with compound 4.

The transformer works as follows.

The frames are inserted into each other and put on the core. Frame 2 has -obXI

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different shapes, with the lower flange shorter than the upper. The width of the upper flange is chosen as follows: it can be no more than the Width of the core window, but to improve the quality of the assembly, the step 3 of the frame 3 is provided in the design, the width of the step A depends on the manufacturing technology. The width of the lower flange of the frame 2 corresponds to the thickness of the primary winding. Frame 3 has

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-form. The width of the lower flange corresponds to the width of the magnetic core window, and the width of the upper flange corresponds to the thickness of the secondary winding plus the thickness of the frame wall. To increase the electrical strength of the transformer, the frame flanges are designed so that when assembling the coil, the frame flanges overlap, increasing the path of possible current leakage, and in

lacquer or compound 4 is applied to the floor. This construction allows the use of a transformer with increased requirements for electric strength.

Compared with the prototype, the manufacture of coils of the same axial and largest lengths for a given type of core leads to an increase in the area of the window for the primary winding. it

makes it possible to carry out primary winding with a large cross-section wire, which ultimately leads to an increase in the useful power of the transformer. In addition, the proposed device is characterized by increased maintainability, and it is also possible to carry out the winding of the primary and secondary windings at the same time, which indicates an increased manufacturability of the assembly.

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Claims (2)

1. The transformer is mainly for medical devices, containing a core with frames located on it with primary and secondary windings, one of the frames is made of (-shaped shape, characterized in that, in order to increase the useful power of the frame having a -shaped shape, the upper flange made longer than the bottom, the second frame is made 1g-shaped, the width of the upper flange corresponds to the thickness of the secondary winding plus the wall thickness of the frame, the width of the lower flange corresponds to the width of the window of the magnetic circuit. 2. The transformer according to claim 1, with the exception that the gaps between the flanges are filled with insulating fastening material.