Design and implementation of SPWM output based on STMF407

In engineering practice, it is sometimes necessary to transmit SPWM wave according to test requirements. In order to provide an efficient and convenient solution for SPWM wave transmission, this paper designs and implements a SPWM transmission system based on STMF407. The upper computer controls its work flow in real time through CAN bus, and the signal acquisition and processing system controls the SPWM wave with adjustable frequency, phase and intensity and envelope coefficient transmitted by the system through 485 bus, and monitors the transmission voltage and current of SPWM in real time through AD7606, and stores the transmission voltage and current data in FLASH for subsequent query. Through a large number of experiments, this system has realized the SPWM wave transmitting function well, and has the advantages of simple operation, good SPWM wave shape, strong robustness and good scalability.