"PM50RSAl20集成变频器控制电路设计与应用"

Abstract: Frequency converter has been widely used in various industries and has become one of the main technologies for energy saving, transforming traditional industries, improving process flow, increasing the level of automation in production, enhancing product quality, and improving the environment. Frequency converter technology is a green technology that is widely needed in national economy and daily life, and it is also one of the fastest evolving fields internationally. Switching devices are the core components of frequency converters. Insulated Gate Bipolar Transistor (IGBT) has quickly become the dominant component in medium and small power electronic devices since its introduction to the market, and its voltage, capacity, and switching frequency performance are continuously improving. Intelligent Power Modules (IPM) integrate multiple conventional IGBTs, providing convenient conditions for reducing design and production costs for users, and effectively improving system performance and reliability. The integrated drive and protection circuits in IPM simplify system design, and its self-protection function greatly reduces the possibility of module damage during testing and field applications. The comprehensive performance of systems greatly improves after adopting IPM, and its cost effectiveness has exceeded that of IGBT, making it a good economic choice. This paper designs a small general-purpose frequency converter with a power of 1,500 W using the IPM module PM50RSAl20, and integrates the switching power supply into the frequency converter, making it small in size and convenient for use in low-power applications. Keywords: frequency converter, control circuit, PM50RSAl20, low power circuit.