Magnetic induction coil module

Abstract

The invention provides a magnetic induction coil module, which comprises a coil module consisting of a first group of coils and a second group of coils, a first isolation layer is coated on the firstgroup of coils, the second group of coils is a flat coil and is provided with an open first loop body, so that two end parts which are not contacted with each other are formed, one end part is provided with a first conduction part which protrudes towards the outside of the first loop body, the other end part is provided with a connecting end, the connecting end integrally extends outwards to forman open second loop body, the tail end of the second loop body is provided with a second conduction part which protrudes outwards, a turning part wraps the connecting end, the second loop body and thefirst loop body are oppositely arranged in the same direction through the turning part, and the second group of coils are positioned on the first isolation layer in a clamping manner, so that the assembly efficiency is improved, and the reject ratio of products is reduced.

Description

technical field [0001] The invention relates to a coil module, in particular to a magnetic induction coil module used for inductors and transformers. Background technique [0002] For example, the framework of a magnetic induction coil module such as a transformer includes at least two sets of independent coils (coils), the so-called "primary coils" and "secondary coils". The coil (turn) ratio is used to convert the voltage value. [0003] In practical applications, the transformer is usually built on an independent insulating base (base), and the insulating base is pre-distributed with a plurality of conductive pins (pins) or contact legs connected to the coil to form a transformer assembly. It is connected to the external circuit through these conductive pins or contact pins, so that the transformer assembly is connected to the external circuit, and at the same time, the insulating base is used as a signal isolation to avoid interference. [0004] In order to meet the mi...

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Problems solved by technology

[0006] 1. It should be noted that using PCB printing technology to manufacture conductive coil patterns to become the primary and secondary coils of transformers is complicated, the current resistance is small, and the cost burden is high. It is difficult for the manufactured products to have a price competitive advantage in the market.

[0007] 2. Coating insulating varnish on the surface of the two groups of coils to isolate each other is difficult to meet the safety requirements of transformer manufacturing, and it is easy to cause damage to the transformer during operation; especially used in AC-to-DC (AC-DC) ) transformer, due to the large voltage difference at the alternating current (AC) power supply terminal, the isolation between the primary coil and the secondary coil must have a certain safety distance in terms of specifications

[0008] 3. In the prior art of No. CN201138608 Figure 7 And in the transformer disclosed in FIG. 8, when a group of primary coils 5A and two groups of secondary coils 4A, 6A are assembled with the magnetic core M1, the central magnetic conducting column of the magnetic core M1 must pass through each group of coils pre-prepared. Therefore, the alignment of these coil assembly holes must be very precise, otherwise it will cause difficulties in assembly, or cause the gap between the coil and the magnetic core to be too large

[0011] 1. There is no isolation design with a safe distance between the flat coils. As mentioned above, even if a layer of insulating varnish is applied on the surface of each group of coils as isolation, it is difficult to meet the requirements of transformer safety regulations, especially for connecting the market. Electric transformer, due to the large voltage difference at the power supply end, it is easy to cause damage to the transformer during operation

[0012] 2. Each group of coils is an independent unit and component. When assembling with the magnetic core, the central magnetic guide column of the magnetic core must pass through the assembly holes reserved on each group of coils in sequence, so the assembly holes of these coils Alignment must be very precise, which not only increases the difficulty of assembly and is prone to failure, but also wastes man-hours, and it is even more difficult to introduce automated processes, which is not conducive to a large number of production operations

[0013] 3. The plurality of conductive needles are pre-fixed on an independent base (base), and the wire ends of each coil, whether primary or secondary, must be connected to each conductive needle one by one for conduction. If the coil The higher the number of connections (this is related to the turn ratio of the primary and secondary coils), it is bound to affect the production effect. Obviously, the more the number of connections, the more prone to errors, such as blind connection or wrong connection, which will result in failure rate. increase

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