CN207752870U - A kind of PQ types high-frequency and high-voltage integrated transformer - Google Patents

Abstract

The utility model relates to a PQ type high-frequency and high-voltage integrated transformer, which integrates the inductor and the transformer in the line, completely separates the primary and secondary stages of the transformer, and has no overlapping, so that the mutual coupling degree of the primary and secondary stages is quite poor, so that To reduce the inter-electrode capacitance between the windings, reduce the noise in the circuit and the instability of the output, by adjusting the air gap of the inductance part, the leakage inductance of the transformer can be effectively controlled, and the leakage inductance can be kept within a certain range. The beneficial effect is The circuit is simple, the volume is small, the insulation is high, the connection reliability is high, the processing technology is simplified, the production efficiency is high, the labor cost and material cost are greatly reduced, the noise in the circuit and the instability of the output are reduced, and the adhesion effect and proximity effect are solved. , so as to meet the market's high-quality demand for high-frequency high-voltage power transformers in LLC circuits.

Description

A PQ type high frequency and high voltage integrated transformer

technical field

The utility model relates to a transformer structure, in particular to a PQ type high frequency and high voltage integrated transformer.

Background technique

Now the actual LLC circuit uses an inductor and a transformer to achieve the required parameters. The disadvantage is that the transformer needs an external inductor, and the transformer needs to be used in series with the inductor. Compared with the same frequency and same power equipment, the volume is relatively large, the processing technology is complicated, and the cost will increase by 15%~20%. At present, because the market puts forward higher requirements on the size and performance of high-frequency power transformers, it is necessary to develop new transformers and corresponding processing techniques to meet market demand.

Contents of the invention

In view of the deficiencies of the existing technology and market demand, the utility model provides a PQ type high-frequency high-voltage integrated transformer, which integrates the inductor and the transformer in the line, and completely separates the primary and secondary windings of the transformer without overlapping, so that The degree of mutual coupling between the primary and the secondary is quite poor, so as to reduce the inter-electrode capacitance between the windings, reduce the noise in the circuit and the instability of the output. By adjusting the air gap of the inductance part, the leakage inductance of the transformer can be effectively controlled, and the leakage inductance can be kept within a certain range. The technical solution adopted is a PQ-type high-frequency and high-voltage integrated transformer, including a PQ-type inductance skeleton, a PQ type transformer bobbin, PQ inductance magnetic core, PQ transformer magnetic core, terminals, inductance winding, transformer primary winding, transformer secondary winding. In one body, the PQ-type inductance bobbin has an inductance winding made of polyimide film three-layer insulated twisted wires. The primary winding of the transformer made of polyimide film three-layer insulated stranded wire is wound, and its tail is connected to the terminal. On the outer surface of the transformer primary winding, there is a transformer secondary winding made of polyimide film three-layer insulated stranded wire. Winding, its start and end terminals are connected, two PQ type transformer cores are installed on the PQ type transformer frame, the functional surface is bonded together with anaerobic adhesive, and the PQ type inductance core is installed on the PQ type inductance frame, the function The surface is bonded to one side of two PQ transformer cores with anaerobic adhesive, dipped in paint and dried.

The polyimide film three-layer insulated twisted wire is composed of three layers of polyimide film wrapped on the outer surface of the insulating twisted wire.

The starting end of the inductance winding, the tail end of the primary winding of the transformer, and the starting and tail ends of the secondary winding of the transformer are welded by a resistance welding machine.

The beneficial effect of the utility model is that the circuit is simple, the volume is small, the insulation is high, the connection reliability is high, the processing technology is simplified, the production efficiency is high, the labor cost and material cost are greatly reduced, and the noise in the circuit and the instability of the output are reduced. , to solve the tendency effect and proximity effect, thus satisfying the market's high-quality demand for high-frequency and high-voltage power transformers in LLC circuits.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the skeleton structure diagram of PQ type transformer of the present utility model;

Fig. 3 is the structure diagram of the PQ type inductance skeleton of the present utility model;

Fig. 4 is a structural schematic diagram of the magnetic core of the present invention.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

Example

As shown in Figure 1-4, the PQ-type high-frequency and high-voltage integrated transformer includes PQ-type inductance bobbin 1, PQ-type transformer bobbin 2, PQ-type inductance core 3, PQ-type transformer core 4, terminal 5, inductance winding 6, Transformer primary winding 7, transformer secondary winding 8, the inductance winding 6, transformer primary winding 7, and transformer secondary winding 8 are composed of three layers of polyimide film wrapped on the outer surface of the insulated stranded wire, and the PQ type inductance bone 1 It is integrated with the PQ type transformer bobbin 2 through the connecting wire of the inductance winding 6 and the transformer winding 7. On the inductance bobbin 1, 4 layers of winding wires are wound in a total of 9 turns to form the inductance winding 6. As the starting end of the primary winding 7 of the transformer, the PQ type transformer skeleton 2 is firstly wound with 3 layers of 30 turns of winding to form the primary winding 7, the end of the primary winding 7 is connected to the terminal 5, and 2 layers are wound on the surface of the primary winding 7 A total of 23 turns of winding form the secondary winding 8, the starting and ending ends of the secondary winding 8 are connected to terminal 5, the starting end of the inductor winding 6, the tail end of the transformer primary winding 7, the transformer secondary winding 8 starting and the tail end, welded with resistance machine soldering terminal 5,

PQ type inductance magnetic core 3 uses PQ50/40 magnetic core, PQ type transformer magnetic core 4 uses PQ50/45 magnetic core, and two PQ type transformer magnetic cores 4 are installed from both sides of PQ type transformer skeleton 2 respectively. The surface is bonded together with anaerobic adhesive, and the PQ-type inductance core 3 is loaded from one side of the PQ-type inductance skeleton 1, and the functional surface is bonded to one side of the two PQ-type transformer cores 4 with anaerobic adhesive. The fixture is fixed, and after the glue is cured, the fixture is released and connected into one body, and the assembled high-frequency and high-voltage integrated transformer is tested, and the qualified high-frequency and high-voltage integrated transformer is dipped in paint and dried to complete.

Claims (3)

1. A PQ-type high-frequency and high-voltage integrated transformer, including a PQ-type inductance bobbin (1), a PQ-type transformer bobbin (2), a PQ inductance core (3), a PQ transformer core (4), terminals (5), The inductance winding (6), the transformer primary winding (7), and the transformer secondary winding (8), are characterized in that: the PQ-type inductance bobbin (1) and the PQ-type transformer bobbin (2) pass through the inductance winding (6) and the transformer winding ( 7) The connecting wires are connected into one body, and the PQ-type inductance skeleton (1) has an inductance winding (6) wound with a polyimide film three-layer insulated twisted wire row, and the inductance winding (6) is connected to the terminal (5) , The tail end is the starting end of the primary winding (7) of the transformer at the same time. The PQ type transformer skeleton (2) has a primary winding (7) of the transformer wound by a three-layer insulated twisted wire row of polyimide film, and its tail end is connected to the terminal (5), on the outer surface of the primary winding (7) of the transformer, there is a secondary winding (8) of the transformer wound by a three-layer insulated twisted wire row of polyimide film, and its start and end are connected to the terminal (5), two The PQ type transformer core (4) is installed on the PQ type transformer frame (2), and the functional surface is glued together with anaerobic adhesive. The PQ type inductance core (3) is installed on the PQ type inductance frame (1). The surface is bonded to one side of two PQ transformer magnetic cores (4) with anaerobic adhesive, dipped in paint and dried. 2. A PQ-type high-frequency and high-voltage integrated transformer as claimed in claim 1, characterized in that: the three-layer insulated twisted wire of polyimide film is wrapped with three layers of polyimide film on the outer surface of the insulating twisted wire Amine film composition. 3. A PQ type high-frequency and high-voltage integrated transformer according to claim 1, characterized in that: the starting end of the inductance winding (6), the tail end of the transformer primary winding (7), and the transformer secondary winding (8) Use a resistance welding machine to weld the terminal (5) at the start and end.