Photovoltaic inverter heat dissipation_Application

Application

PHOTOVOLTAIC INVERTER HEAT DISSIPATION

Inverter is also called power regulator. The process of converting DC power into AC power is called inversion. The circuit that completes the inverting function is called inverting circuit. The device that realizes the inverting process is called inverting equipment or inverter. In solar power generation system, the efficiency of inverters is an important factor to determine the capacity of solar cells and storage batteries. The failure of photovoltaic inverters will lead to the shutdown of photovoltaic system, which will directly cause the loss of power generation. Therefore, high reliability is an important technical index of photovoltaic inverters.

Solution to Heat Dissipation of Photovoltaic Inverter（210KW）

Simulation model and parameter schematic diagram

Parameters：

Ambient temperature：55⁰C

Reactor Heat Consumption：700W

Assuming the system impedance is 80Pa, the curve of the fan passing through the radiator is as follows

The left figure shows the internal structure of Infineon and the schematic diagram of heating elements.

Diode：59W； IGBT：124.5W； Total：1100WW；

Assuming that the heat conducting medium is：0.15mm Thick，K=3W/m*K.

Assuming the system impedance is 80Pa, the curve of the fan passing through the radiator is as follows

Heatsink parameters：

Size：W236*L200*H304mm

Thick：0.6mm

Pitch between teeth:3.0mm

Number of teeth：77fins

Heat pipe parameters：

D8 Sintered tube or fibre tube；

Use 24pcs U heat pipe (one layer layout) and type 48 PCs L heat pipe (two layers layout)；

Welding with 4258 low temperature solder paste；

Substrate: AL Plate + Copper Plate (IGBT Heat Source Area)

Compared with two-layer heat pipe, one-layer heat pipe has lower cost and higher heat dissipation efficiency.

Simulation sketch of pressure diffusion degree of section in module

Temperature Diffusion Simulation Diagram of Section in Module

The temperature difference between the two ends of the heat pipe is 5.7 degrees, which meets the actual heat pipe standard.

Temperature diffusion simulation sketch of bottom heat pipe

Temperature Diffusion of Heat Pipe at the Bottom of Radiator

NTC Temperature Diffusion Simulation Diagram of Module

Diagram of Fan Action Point

Universal Radiator

Surface treatment: Anodized, Powder Coating, Polished.

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Application

Application