Query on the utility model patent of the latest th

2022-07-25
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Query on utility model patent of new structure three-phase capacitor

Abstract: according to the patent application, the component structure of the utility model three-phase capacitor with patent No. zlu is formed by adding a layer of electrode plate and a dielectric layer on the traditional single-phase structure of two-layer electrode plate and two dielectric layers

key words: query on utility model patent of new structure three-phase capacitor details the utility model three-phase capacitor with patent No. zlu. According to the patent application, its component structure is formed by adding a layer of electrode plate and a dielectric layer on the traditional single-phase structure of two-layer electrode plate and two dielectric layers. The three-layer plates are used as three-phase poles, each of which is separated by a dielectric layer and wound according to the traditional process to form a three-phase capacitor element. Dozens of three-phase components, each pole is connected in parallel to form three, which has low density and good sound insulation effect; Phase capacitor with high specific performance, specific strength and specific modulus. In the patent abstract, it is proposed that "compared with the traditional three-phase capacitor composed of three single-phase capacitors with the same capacity, the material of the capacitor is saved by 50%, the volume is reduced by 50%, the weight is reduced by 50%, the specific characteristics of the capacitor are greatly improved, and the energy loss of the dielectric is reduced." The patent specification also states that it is "proved by theory and practice". In the patent specification, it is mentioned that the traditional three-phase capacitor has 6 plates and 6 dielectric layers, which means that the new three-phase capacitor in this patent only needs 3 plates and 3 dielectric layers. It is assumed that the patent applicants have reduced the number of patent applicants by half, so that the argument that the materials will also be saved by half has reached the conclusion that the materials will be saved by 50%. However, the author thinks that it is impossible to save 50% of the material on the premise that the capacity, dielectric composition and working field strength are the same, because it violates the basic principle of capacitor formation. The components of traditional single-phase and three-phase capacitors are of single-phase structure. There are two dielectric layers between the two plates, forming a scheme to help customers optimize. The two capacitor banks are connected in parallel. Capacitance is calculated by the following formula: c=2 εε 0S/d=2 εε In the formula  0b  JB  L/D  J (1), s and L are the effective area or effective length of a dielectric layer of the element respectively, BJB is the width of the electrode plate (the effective width of the dielectric layer), DJ is the thickness of the inter electrode medium, ε 0 is the vacuum dielectric constant (1/4 π × nine × 1011F/cm), ε Is the relative dielectric constant of the dielectric layer. From formula (1), the effective length of a dielectric layer after the element is expanded is: l=cd  J/2 εε  0b  JB -- [jy] (2) and derived from formula (1), the number of element winding turns is: W  y=[sx (][kf (]d  2  0+[sx (]144cd  J (D  j+d  JB) [] ε fbjb [SX)][KF)]-D0[]4(dj+djb)[SX)] × Where d0 is the spindle diameter (mm) and C is the rated capacitance( μ F) , DJ is the medium thickness after taking into account the compaction coefficient K (dj= medium thickness( μ m)/k), DJB is the plate thickness( μ m), ε F is the composite dielectric coefficient, BJB is the plate width (mm). The three-phase capacitor element of the new structure in this patent is a three-phase structure. There is only one dielectric layer between the two plates, and its capacitance can only be calculated according to formula (4). C= εε 0S/dj= εε  0b  JB  L ′/D  J (4) the effective length of a dielectric layer (one phase) of a three-phase element is:  L ′ = CD  J/εε 0b  JB  (5) according to formula (4), POM can not be mixed in other materials in principle, and the winding number of elements is: W ′ y=[sx (][kf (]d  2  0+[sx (]288cd  J (D  j+d  JB) [] ε fbjb[ SX)]-D0[KF)][]4(dj+djb)[SX)] × Assume a three-phase capacitor with only three traditional single-phase elements. When the patented three-phase element is adopted, there is only one element (referred to as single-phase element and three-phase element respectively). The calculated capacitance is the phase capacitance C. From equations (1) and (4), the effective length of electrode plate and dielectric layer after element deployment is obtained as follows: traditional single-phase element: l1=cdj/2 εε 0bjb (7) patented three-phase element: l3=cdj/εε 0bjb (8) it can be seen from equations (7) and (8): l3=2l1 (9), that is, on the premise of comparison (except that the single-phase element is composed of 2 dielectric/polar layers and the three-phase element is composed of 3 dielectric/polar layers during winding, the other parameters are unchanged. The same below). When comparing by one phase, the effective length of the medium or the effective length of the polar plate of each phase after the three-phase element is expanded (hereinafter referred to as the total effective length of the material

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