Laminated busbar for photovoltaic grid-connected inverter

Abstract

The invention aims to provide a laminated busbar for a photovoltaic grid-connected inverter, which is simple in structure, good in heat dissipation effect, capable of suppressing IGBT peak voltage, low in cost and easy to carry out standardized production. The laminated busbar comprises insulating heat conduction layers and two layers of red-copper copper plates, wherein the two layers of red-copper copper plates are rectangular, two side surfaces of each red-copper copper plate are provided with the insulating heat conduction layers, the insulating heat conduction layers and the red-copper copper plates are fixedly connected together to form a seamless flat integral whole, the red-copper copper plates and the insulating heat conduction layers are correspondingly provided with positive / negative electrode capacitance connecting holes which are arranged at intervals, one side edge of the red-copper copper plate is provided with positive / negative electrode wiring terminals, and the adjacent side edge is provided with IGBT positive / negative electrode terminals which are arranged at intervals. According to the invention, the laminated busbar is enabled to achieve the effect of normal use at a normal temperature without independently adding a fan because of adoption of the insulating heat conduction layers; and the integral laminated busbar is of a flat structure, thereby saving the space, and being capable of achieving a series of purposes of standardized production.

Description

technical field [0001] The invention relates to the technical field of laminated busbars, in particular to a laminated busbar for a photovoltaic grid-connected inverter. Background technique [0002] At this stage, most of the production of photovoltaic inverters still adopts traditional wiring technology, which brings problems that: the performance of individual products varies greatly, and it is difficult to achieve standardization and mass production. Wiring work must be done manually. Due to the individual differences of operators and the differences in production batches, the wiring and routing methods of each product and the length of the wiring lines are not exactly the same, resulting in different parameters such as stray inductance of each machine, which also makes The performance of different batches of products is different, which affects the stability of product quality. At the same time, the appearance of products will not be exactly the same. [0003] The vol...

AI Technical Summary

Problems solved by technology

[0010] 2. When the Snubber circuit discharges the stored energy of the parasitic inductance, the resonant frequency on the LC circuit is very high, making it difficult to solve the EMI problem

[0011] 3. The Snubber circuit does not completely suppress the switching loss of the IGBT, which further reduces the efficiency of the inverter and increases the difficulty of heat dissipation of the inverter

[0012] 4. High cost and difficult manufacturing:

[0014] Although there are related stacked busbars on trial at this stage, because the universal stacked busbars cannot achieve good results, and they all need to solve the heat dissipation problem, a fan needs to be installed where the stacked busbars are used. , which increases the size and cost of the entire device

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