阅读说明：本技术 一种基于金属化陶瓷的感应加热变压器绕组结构 (Induction heating transformer winding structure based on metalized ceramics ) 是由 石珊珊 王娣 于 2021-08-13 设计创作，主要内容包括：本发明公开了一种感应加热变压器绕组结构,由初级绕组线圈,次级绕组绕圈,陶瓷芯体,金属导体结构件构成。采用这种绕组结构可以显著提升感应加热变压器的功率密度,同时具有良好的高频性能和传输效率。(The invention discloses a winding structure of an induction heating transformer, which consists of a primary winding coil, a secondary winding coil, a ceramic core and a metal conductor structural member. The power density of the induction heating transformer can be obviously improved by adopting the winding structure, and the high-frequency performance and the transmission efficiency are good.)

1. A winding structure of an induction heating transformer based on metalized ceramics is characterized in that a primary winding coil and a secondary winding coil are respectively processed on two surface metal layers of a double-sided metalized ceramic plate.

2. The metallized ceramic based induction heating transformer winding construction of claim 1, wherein the primary winding coil is insulated from the secondary winding coil by ceramic.

3. The metallized ceramic based induction heating transformer winding construction of claim 1, wherein the secondary winding coil face is welded to a metallic conductor structure.

4. The metallized ceramic based induction heating transformer winding construction of claim 1, wherein a majority of the heat generated by the primary winding coil is transferred through the ceramic to the metallic conductor structure.

Technical Field

The invention relates to the field of induction heating, in particular to an induction heating transformer winding structure.

Background

An induction heating transformer is generally a high-power step-down transformer, which mainly comprises a primary winding coil, a secondary winding coil, a power ferrite core and a heat dissipation structural member. The current of the primary winding coil of the induction heating transformer is generally dozens to hundreds of amperes, and the current of the secondary winding coil is generally hundreds to thousands of amperes, so that a large amount of heat can be generated during operation.

At present, the induction heating transformer winding has three main realization modes: the first is processing by using a multi-strand enameled wire, the second is processing by using a water-through copper pipe, and the third is processing by using a laminated copper sheet.

The multi-strand enameled wire winding is widely used for medium and small power, but the frequency and power increase is limited by the heat dissipation performance.

The water-through copper tube winding has very large current-carrying capacity, is the mainstream scheme of a high-power induction heating transformer, and has the defects of poor high-frequency characteristic, low utilization rate of a magnetic core window and low power density.

The laminated copper sheet winding is usually matched with a flat magnetic core, and compared with the two schemes, the laminated copper sheet winding has the advantages of good high-frequency performance and high power density, and has the defect that the heat generated by the inner layer copper sheets cannot be timely transferred out due to the fact that flexible materials with low heat conductivity coefficients are needed to be adopted for insulation among the laminated copper sheets, and therefore the laminated copper sheet winding is only suitable for a low-power induction heating transformer.

Disclosure of Invention

The invention provides a winding structure of an induction heating transformer with a brand-new process, and the induction heating transformer with high power, high frequency and ultrahigh power density can be manufactured by adopting the winding structure. The specific scheme is as follows:

a double-sided metalized ceramic plate is adopted to process a winding coil, and the structure of the double-sided metalized ceramic plate is a ceramic core (1) and two surface metal layers.

The ceramic core body is made of alumina ceramic, aluminum nitride ceramic, beryllium oxide ceramic, silicon carbide ceramic or silicon nitride ceramic. The main component of the surface metal layer material is copper foil.

And respectively processing a primary winding coil (2) and a secondary winding coil (3) on two surface metal layers of the double-sided metalized ceramic plate, and obtaining the coil ceramic plate after the processing is finished.

The secondary winding coil surface of the coil ceramic plate is welded to a metal conductor structural member (4), and the metal conductor structural member has three main functions: the secondary current is partially carried, heat generated by the primary winding coil and the secondary winding coil is transferred out, and the structure is supported, installed and fixed.

The ceramic core has two main functions: the primary winding coil and the secondary winding coil are insulated, and heat generated by the primary winding coil is transferred to the surface of the secondary winding coil.

The scheme can be used for manufacturing induction heating transformer windings with two basic structures: the first one is to weld a coil ceramic plate of the above-mentioned process on both sides of a metallic conductor structural member as shown in fig. 1, and the coils of the two coil ceramic plates may be connected in series or in parallel on a circuit or not connected to be driven independently of each other, and the second one is to weld a coil ceramic plate on only one side of a metallic conductor structural member as shown in fig. 2.

Drawings

Fig. 1 is a cross-sectional view of a winding structure of an induction heating transformer of a dual-coil ceramic board.

Fig. 2 is a cross-sectional view of an induction heating transformer winding structure of a single coil ceramic plate.

Detailed Description

The induction heating transformer winding structure provided by the invention can be used for manufacturing induction heating transformers in various styles, and three typical embodiments are provided below.

The first one is suitable for medium and small power type induction heating transformer, and the metallized ceramic winding is processed into the shape matching the selected power ferrite core and assembled together to form the complete induction heating transformer.

The second type is suitable for a high-power induction heating transformer, and under the condition that the power of one metallized ceramic winding structure is insufficient, two or more metallized ceramic winding structures are selected to be assembled with a power ferrite magnetic core, so that the power of the induction heating transformer is increased.

The third one is suitable for ultra-high frequency type transformer, its simple in construction, use the metallized ceramic winding structure proposed by the invention as the potential transformer directly, do not need the ferrite core of power, can dispel the core loss under the high frequency like this.

The above examples are merely illustrative for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.