Photovoltaic inverter cooling solution

 Inverter is also known as power supply regulator, the process of converting DC energy into AC energy is called inverter, the circuit to complete the inverter function is called inverter circuit, the device to realize the inverter process is called inverter equipment or inverter. In solar power generation system, the efficiency of inverter is an important factor to determine the capacity of solar cell and battery. The failure of the photovoltaic inverter will lead to the shutdown of the photovoltaic system, directly bring the loss of power generation, so high reliability is an important technical index of the photovoltaic inverter.

  The good heat dissipation of photovoltaic inverter is an important condition to ensure its high reliability operation. Therefore, the thermal simulation at the beginning of the design of the inverter has become the first problem to be considered by photovoltaic inverter manufacturers.

Schematic diagram of simulation model and parameters (1):

Ambient temperature: 55⁰C, reactor heat consumption: 700W.

Assuming that the system impedance is 80Pa, the curve diagram of the modified monomer passing through the radiator fan is as follows:

Schematic diagram of simulation model and parameters (2):

Schematic diagram and parameters of the simulation model of the radiator design scheme:

Heat sink specification:

Size: W236*L200*H304mm

Fin :

Thickness: 0.6mm

Tooth spacing: 3.0mm

Number of teeth: 77fins

Heat pipe spec:

D8 sintered tube or fiber tube;

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

Use 4258 low temperature solder paste for soldering;

Substrate: AL plate + copper plate (IGBT heat source area)

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

Heat sink simulation pictures

Schematic diagram of simulation of temperature diffusion degree of NTC module:

Summary of simulation data of photovoltaic inverter cooling scheme:

Sinda Thermal is professional thermal expert, we are offering many thermal solutions and heat sinks to the global customers, we can design the optimized performance heat sinks and manufacture them in house, our factory owns over 100 employees and many precise facilities and equipment. Please contact us freely if you have any thermal requirements.