Application background STM32F103 timer 1 to generate SVPWM, with the main idea of SVPWM is three-phase symmetrical sine wave voltage three-phase symmetrical motor stator ideal flux circle as the reference standard to three-phase inverter with different switching mode for proper switching, resulting in the formation of PWM wave, to form the actual flux vector to keep track of the accurate flux circle. The traditional SPWM method from the point of view of power starting to generate a sine wave power supply capable of frequency modulation and voltage regulation, and SVPWM method will inverter system and the asynchronous motor as a whole to consider, the model is simple, but also facilitate the microprocessor real-time control Key Technology The ordinary three-phase full bridge is the three bridge composed of six switching devices. The six switch device combined together (the same bridge arm of the upper and lower half bridge signal opposite) a total