CS266013B1 - Method of winding and arresting primary coil ends of halving sources - Google Patents

Abstract

The solution falls into the field of electronics and electrical engineering, where end transformers of pulse sources are used, e.g. for computer equipment. The design of the coils corresponds to the assembly in cup ferrite cores. It solves the method of winding and locking the primary coils of end transformers of pulse sources for low power with minimal energy losses and minimal geometric dimensions. The design makes it possible to meet high demands on electrical strength between the primary and secondary windings and the transformer frame while achieving excellent dynamic properties of the electromagnetic parameters of the transformer, and thus higher quality of the entire source. The essential feature of the method is the machine winding of the primary winding with a pre-tensioned insulated wire and its locking by spraying with an electrically insulating material.

Description

The invention relates to a method for winding and arresting primary coils of end transformers of pulse sources for various voltages, used in particular in electrical engineering and electronics for computer devices, testers and devices.

Previously used methods of winding and arresting the primary coils of pulse source transformers have a loosely wound conductor. The treatment of the windings and the formation of electrical load-bearing insulation is carried out, for example, by impregnation, dipping, potting, interleaving with electrically insulating material, etc.

The disadvantages of the existing methods are lower electrical strength between the primary and secondary windings, increased noise, higher technological production requirements, less electromagnetic coupling between the primary and secondary windings and difficult repairability.

The above-mentioned drawbacks are eliminated by the method of winding and locking the primary coils of the end transformers of pulse sources according to the invention, the essence of which is the mechanical winding of the primary by a prestressed conductor and its locking by spraying with electrically insulating material.

The use of the method of winding and arresting the primary coils of pulse source transformers according to the invention brings new and higher effects in that it allows to meet high demands on electrical strength between primary and secondary winding and transformer frame, reduces noise and technological production, improves electromagnetic coupling between primary and secondary windings and allows repairability. The dynamic properties of electrical parameters are improved during autonomous control of the working operation of the pulse transformer. The stray inductance of the winding is reduced. The minimum geometric dimensions allow the transfer of the required power to devices in computer technology. Space is used for maximum filling with windings.

The figure shows a cross section of the primary coil of the transformer. On the frame of the coil £ of electrically insulating plastic material, after the machine winding of the prestressed insulated conductor £, an electrically insulating material £ is injected, which locks the prestressed conductor.

The method of winding and arresting the primary coils of transformers of pulse sources for voltage 40 V can be performed as follows:

Operation 1 Make a molding of the coil frame from plastic, eg ABS FORSAN 548.

Operation 2 Gradually attach a 1x0.2 PND 72-448.6-82 flexon hose to the outlets and untie the thread. Machine primary winding with wire LCTA φ 0.6 CSN 34 7336, 100 turns. Adjust the winder brakes to a wire tension of 25 N, keep the pretension even when untying the end of the winding.

Operation 3 Make an injection of the primary coil of the transformer with a plastic, eg ABS FORSAN 548.

4. operation Winding the secondary winding according to the drawing.

5th operation Assembly of the coil, eg in a cup core.

A possible use of the invention is in the production of pulse source transformers of a new design with cup cores for small powers up to 100 W with minimal energy losses and small geometric dimensions. Low warming due to small losses allows the use of common domestic plastics such as ABS FORSAN 548, TATREN ME 311.

Claims (1)

OBJECT OF THE INVENTION A method of winding and locking primary coils of end transformers of pulse sources, characterized in that an insulated conductor with a bias voltage of 10% to 25% of its strength is wound on the electrically insulating frame of the plastic coil and its locking is performed by spraying with electrically insulating material.