Design Analysis of LLC Resonant Converter with ZVS Implementation

The LLC resonant converter, in which the driving frequency regulates the output voltage is one of the most often used switching Dc-Dc converters. The LLC resonant converter is popular among all power converters used in numerous applications, such as computer power supply, LED lighting, and electric vehicles. It is an attractive alternative due to its high-power density, low EMI, and excellent efficiency. The converter uses a resonant circuit with a transformer, capacitor, and inductor as its main components. Due to the converter resonant circuit’s ability to operate at high frequencies, its component is smaller and lighter. Moreover, soft switching techniques are used in LLC resonant converters to reduce switching loss and increase efficiency. The construction of an LLC resonant converter, which consists of a half-bridge inverter, a resonant circuit with two inductors, a capacitor, and a rectifier circuit is explained in detail in this article. The resonant capacitor is initially charged with a DC input voltage before the converter can function. The transformer and inductor work together to transmit energy to the output load after that moreover resonant capacitor and transformer control voltage by adjusting their resonant frequencies to match the output voltage, they are well suited for use in a number of applications. They are a popular choice for power conversion in many industries due to their excellent efficiency, dependability, and EMI performance.