A wonderful lecture on hybrid inverter to Ningbo University students

On Nov.15,2024, Mr.Shang of SUNTCN, a Senior hardware engineer made a wonderful lecture on hybrid inverter to Ningbo University students.

As the global demand for renewable energy continues to increase, the global photovoltaic inverter market size is expected to maintain a high growth rate in the coming years. The market demand of Solar Inverters and Hybrid Inverters will also continue to grow, the efficiency of inverters will continue to increase and the scope of application will become wider. 

As a high-tech company specializing in the development, production and sales of inverters, SUNTCN has close research and study cooperation with Ningbo University. Mr.Shang, as a senior hardware engineer,was invited to make a lecture on Hybrid Inverter to the Ningbo University students.

The following are some of the wonderful lecture:

(I) Introduction of Hybrid Inverter

A hybrid inverter is a device that converts direct current into alternating current, and is mainly used in conjunction with renewable energy systems such as solar panels and wind turbines. It can convert the energy into a unified alternating current, which is then transmitted to the power grid or used for home and business electricity. This design enables the hybrid inverter to more effectively utilize various renewable energy sources, improve energy utilization, and reduce environmental impact.

(II) The entire process of circuit design

A.Requirement Analysis: Understand the power requirements, input sources (solar panels, batteries etc.), output specifications (voltage, frequency for AC), and any specific features like grid - tie or off - grid capabilities.

B.Schematic Design: Select appropriate power electronics components such as transistors, diodes, and capacitors. Design the circuit topology for power conversion, control circuits for managing different power sources, and protection circuits to safeguard against overvoltage, overcurrent etc.

C.Simulation: Use software tools to simulate the circuit's behavior under different conditions to verify its functionality and performance, and make necessary adjustments.

D. PCB Layout: Place components considering heat dissipation, signal integrity, and minimizing interference. Route the traces for power and signal paths.

E. Prototyping and Testing: Build a prototype of the circuit, test its electrical performance, efficiency, and stability. Make refinements based on test results to optimize the design.

(III) PCB Layout and welding skill

In terms of PCB Layout, according to the functional module partition of the circuit, place related components in close positions to reduce signal interference and wiring length. For example, high-frequency components should be kept as far away from low-frequency components as possible. For wiring, wiring rules should be followed, such as the power line and ground line should be wide enough to carry current.

When soldering PCB boards, skills are crucial. For manual soldering, choose a soldering iron with appropriate power and master the soldering time. Make sure the pad is clean before soldering, and let the solder fully soak the pad and pin during soldering. For SMD components, use a hot air gun or soldering iron with flux for soldering. At the same time, pay attention to avoid problems such as cold soldering and short circuit to ensure the quality of soldering.

The students spoke highly of the lectures given by the business school. They said that through the explanations of the business school, they had a new understanding of Solar Inverter and Hybrid Inverter, and a deeper understanding of circuit design, PCB Layout and welding skills, which laid a solid foundation for their future development and they look forward to more such learning opportunities in the future.