Abstract : This paper addresses the requirements of variable frequency power supplies for asynchronous motors driven at high frequencies and speeds. It discusses how to use the dedicated motor control chip 8XC196MC to implement three-phase SPWM inversion and the software implementation of V/F control strategies in a microcontroller. IGBTs are used as switching devices in the main circuit. After analyzing and designing the system's hardware and software structure, experimental results are presented. Keywords : SPWM inverter; asynchronous motor; microcontroller 1 Introduction In many areas of modern production and daily life, ultra-high-speed machinery is required, with speed requirements significantly higher than the 50Hz speed of ordinary motors. Moreover, DC motor speed control systems and general-purpose variable frequency speed control systems are usually unsuitable for such high-speed applications. To solve this problem, a variable frequency power supply capable of outputting a very high frequency is needed to power high-speed squirrel-cage asynchronous motors. Currently, inverter technology commonly uses digital SPWM, applying microcomputer software algorithms to generate SPWM signals. The most commonly used methods include the equivalent area algorithm, natural sampling method, and regular sampling method. While these methods can all be implemented using microcontroller software, their effectiveness is limited by processing speed, storage capacity, and the constraints of their algorithmic functions. Improvements in modulation frequency and system dynamic response speed are difficult, sometimes hindering practical application. With the development of power electronics technology, especially the widespread use of high-frequency power electronic devices, methods relying solely on software to generate SPWM waves are practically inadequate for high switching frequencies. To improve real-time control, dedicated microcontrollers are generally used in high-frequency inversion. Intel's 8XC196MC microcontroller, specifically designed for motor control, is particularly suitable for high-frequency inversion. The inverter designed in this paper, based on this microcontroller as the core control hardware, can easily achieve three-phase SPWM modulation output and has high practicality. [b][align=center]For more details, please click: SPWM Inverter Based on a Dedicated Microcontroller for Motor Control[/align][/b]