Design of IGBT and MOSFET Renewable Energy Applications Based on 35V, Single Channel Gate Driver

MOSFET imported original FET

Supply 0603 blue LED

Single chip microcomputer STM32L151CCU6

1206RGB (single)

The probe capacitor polarity needle has a head diameter of 5.8. The total length of the 7-pin and 12-pin needles is 5.

Overview:
Introduction The renewable energy electronic market segment is a complex and diverse arena for power conversion. In some point-of-load applications, switching power converters are typically non-isolated, have a relatively low power level (<200 W), and often convert power from one DC voltage to another, such as 12V to 3.3V. In addition, the power stage switches are integrated, that is, they can be driven by low current controllers or transistors. Today, the integration between controllers and power stages is becoming a reality. Silicon (Si) MOSFETs play a leading role in this market because people prefer higher switching frequencies, which can reach speeds above 1 MHz. These power switches are typically driven by a 5V or 12V IC gate driver or similar solution.

The Challenge of Efficient Management of Renewable Energy Systems There are some special performance issues in the power system of a wind or photovoltaic generator. Typical renewable energy levels are 1 to 3 kW when using micro-inverters, 3 to 10 kW for string inverters, and 10 kW to 1 MW for large central inverters. In addition to DC to DC conversion, DC to AC and AC to DC conversion can also be used, sometimes in combination.

Old-fashioned wind turbines are directly connected to the grid and can only operate at power line frequencies. After a lot of work points, they become very inefficient. The new wind turbine (Figure 1) often converts AC to DC and then converts the DC back to AC so that the wind turbine can operate at various speeds for maximum efficiency.

Instead, the photovoltaic cell produces a DC voltage/current. In general, the voltage is raised first, then sent through a DC to AC inverter, and finally connected to the grid.

Renewable Energy Trends For most countries in the world, clean energy using wind and solar energy is only a small fraction of its energy. In recent years, renewable energy has been continuously developed. In some places, renewable energy has already taken up a large part. For example, according to the Danish Energy Agency, in the first half of 2012, about 34% of the total electricity produced in Denmark was wind power. The Danish Ministry of Climate, Energy and Construction announced that by 2020, Denmark's wind power will account for 50% of total energy. When wind power accounts for a large share of total energy in a country, the reliability of the conversion system becomes critical. In addition to this, there are high power grid connections, galvanic safety requirements and cost of large renewable energy conversion systems. This means that system reliability is always a design priority, followed by efficiency issues. Therefore, at all levels (from the controller to the FET/IGBT driver itself), protection and reliability are priorities.
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