Efficient Integration Of Intelligence Power Module Research

Power electronic technology integrates electric systems and electronic systems together.It is the bridge between power flow and information flow.At present,semiconductor power device is the most popular power electronic device.After Thyristor and MOSFET,it is moving on to the direction of intelligentialize and integration.Integrated smart power module,which is extensively used,is the dominant technology for integration,miniaturization and intelligentialize.Convert efficiency is one of the most important qualifications.Since the birth of power module,it always motivates the development of this technology to improve convert efficiency.This paper mainly focus on the design of an integrated high-efficiency smart power module.Improving convert efficiency is the emphasis.Three segmented control methods such as traditional detection of peak of load current,optimized detection of peak of load current and detection of duty cycle of PWM signal were studied and compared.The proposed strategy of detection of duty cycle of PWM signal has the advantages of good real-time performance,low power consumption,high reliability,etc.A high-efficiency control module based on the proposed strategy was designed and verified in FPGA.And an experiment of a DC motor driver using the high-efficiency control module was carried out.Tested results shown that the convert efficiency can be improved 4.4% at 100 mA load currentIn This dissertation,an integrated high-efficiency smart power module was analyzed and designed.the high-efficiency control module which was verified was integrated in it.Submodules such as interface circuit,dead-time controller,high-side level shifter,low-side delay circuit,undervoltage protection,overvoltage protection,over temperature protection and overcurrent protection modules were analyzed and implemented.A new circuit which is beneficial for reducing power comsuption was proposed based on optimizing the traditional high-side level shifter.The circuit of the integrated high-efficiency smart power module was simulated.The framework of the layout was designed.The results of the dissertation will contribute to the research of smart power modules.