CN212257074U

CN212257074U - Network transformer

Info

Publication number: CN212257074U
Application number: CN202021332464.XU
Authority: CN
Inventors: 蒋平
Original assignee: Zigong Up Conn Electronics Co ltd
Current assignee: Zigong Up Conn Electronics Co ltd
Priority date: 2020-07-09
Filing date: 2020-07-09
Publication date: 2020-12-29
Anticipated expiration: 2030-07-09

Abstract

A network transformer comprises a winding cavity and a PCB, wherein the winding cavity is composed of an iron core and a bottom plate, the top ends of a pair of side walls of the iron core are respectively provided with at least four pins, a plurality of wires are wound on the iron core, two ends of each wire are respectively connected to eight different pins on different side walls, wiring for short-circuiting the two pins on the same side wall is arranged on the PCB, and the winding directions of the wires connected with the two short-circuited pins on the iron core are the same. Adopt network transformer forms the transformer elementary and secondary that constitute by the series connection winding through a plurality of windings, can carry out data transmission and PoE power supply, has improved data transmission speed and current transmission ability.

Description

Network transformer

Technical Field

The utility model belongs to the technical field of the electron, concretely relates to network transformer.

Background

The network transformer is a necessary module of network equipment such as a base station, a router, an exchanger, a digital network terminal and the like, the network transformer is mainly used for transmitting data, differential signals sent by the PHY are coupled and filtered by using differential mode coupled coils to enhance the signals, and the differential signals are coupled to the other end of a connecting network wire with different levels through conversion of an electromagnetic field; meanwhile, the network transformer also has the function of isolating different levels among different network devices connected by the network cable so as to prevent different voltages from transmitting and damaging the devices through the network cable. The network transformer is mainly used in network switches, routers, network cards and hubs, and plays roles in signal coupling, high-voltage isolation, impedance matching, electromagnetic interference suppression and the like.

SUMMERY OF THE UTILITY MODEL

For further promote network transformer's transmission performance, the utility model discloses a network transformer.

The winding cavity comprises a winding cavity body and a PCB, wherein the winding cavity body is composed of an iron core and a bottom plate, the PCB is characterized in that a pair of side wall tops of the iron core are respectively provided with four pins at least, the iron core is wound with a plurality of wires, the two ends of the wires are respectively connected to eight different pins of different side walls, the PCB is provided with wiring of two pins on the same side wall of the short circuit, and the winding directions of the wires connected by the two pins of the short circuit on the iron core are different.

Preferably, the iron core is an i-shaped iron core.

Preferably, the iron core has 8 pins on two sides.

Preferably, the shorted pin is an adjacent pin.

Preferably, the diameter of the wire is 0.08-0.13 mm.

Adopt network transformer forms the transformer elementary and secondary that constitute by the series connection winding through a plurality of windings, can carry out data transmission and PoE power supply, has improved data transmission speed and current transmission ability.

Drawings

Fig. 1 is a schematic top view of an embodiment of the network transformer according to the present invention;

fig. 2 is a schematic side view of an embodiment of the network transformer according to the present invention;

FIG. 3 is a schematic circuit diagram of an embodiment of the present invention;

the reference numerals in the figures are 1-base, 2-core, 3-conductor, a1-A8, which denote the various pins.

Detailed Description

The following describes the present invention in further detail with reference to the accompanying drawings.

Network transformer, include the winding cavity of compriseing iron core 2 and bottom plate 1, and the PCB board, a pair of lateral wall top of winding cavity has four at least pins respectively, the winding has many wires 3 on the iron core, and the both ends of wire 3 are connected respectively on eight different pins of different lateral walls, the wiring of two pins on having the same lateral wall of short circuit on the PCB board, and the winding direction of the wire that is connected by two pins of short circuit on iron core 2 is the same.

As shown in fig. 1 and 2, the cavity is composed of an i-shaped iron core and a bottom plate, the cavity can be welded on a PCB board, and embedded pins are arranged at the top of the side wall, and the concrete form is the prior art. The winding many wires on the iron core, two liang of groups because two pins of PCB board short circuit make two adjacent wires on the same lateral wall connect the series connection, and many wires form two sets ofly, form the primary and the secondary of transformer respectively.

For example, as shown in fig. 1 and 3, two ends of four wires are respectively connected to pins a1 to A8, the connection pins of the four wires are respectively a1 and a5, a2 and A6, A3 and a7, a4 and A8, a7 and A8 are short-circuited due to short circuit of a1 and a2, the wires are wound on a core to form four windings, the winding directions of the wires connected with the two shorted pins on the core are the same, that is, the two windings connected with the pins a1 and a2 are connected in series, the two windings connected with the pins a7 and A8 are connected in series to form the primary and the secondary of the transformer, and an equivalent circuit is shown in fig. 3; the shorted pins are typically adjacent pins, such as a1 and a2, a7 and A8, etc., shown in fig. 1, to facilitate PCB routing.

By adopting the structure, the series connection of the wire windings is realized, the transformer with wider output range is formed, and the primary winding and the secondary winding are wound in parallel and at the same time, so that the coupling capacitance is increased, and meanwhile, the direct current resistance is reduced by the stranded wires, and the primary high-frequency signal coupling is increased. The Power transmission device can be used for data transmission and PoE (Power Over Ethernet Power supply) Power supply, and multiple strands of wires with the wire diameter of 0.08-0.13 mm can bear 0.6-1A current, and meanwhile, the product meets the requirements of IEEE802.3, and not only can transmit data, but also can supply Power.

The diameter of the wound wire can be increased to 0.13 mm, and compared with the conventional wire with the diameter of less than 0.06 mm, the wire improves the data transmission speed and the current transmission capacity.

In the foregoing, the preferred embodiments of the present invention, if not obviously contradictory or based on a certain preferred embodiment, can be combined and used by any superposition, the specific parameters in the embodiments and examples are only for clearly expressing the utility model verification process of the utility model, and are not used for limiting the patent protection scope of the present invention, the patent protection scope of the present invention is still based on the claims, and all the equivalent structural changes made by the contents of the specification and the drawings of the present invention should be included in the protection scope of the present invention.

Claims

1. The network transformer comprises a winding cavity and a PCB, wherein the winding cavity is composed of an iron core (2) and a bottom plate (1), the top end of a pair of side walls of the iron core is provided with at least four pins, a plurality of wires (3) are wound on the iron core, two ends of each wire are connected to eight different pins of different side walls, wiring for short-circuiting the two pins on the same side wall is arranged on the PCB, and winding directions of the wires (3) connected with the two short-circuited pins on the iron core (2) are different.

2. Network transformer according to claim 1, characterized in that the core (2) is an i-core.

3. Network transformer according to claim 1, characterized in that the core (2) has 8 pins on both sides.

4. The network transformer of claim 1, wherein the shorted pin is an adjacent pin.

5. Network transformer according to claim 1, characterized in that the diameter of the wire (3) is 0.08-0.13 mm.