Electronic Science and Technology ›› 2021, Vol. 34 ›› Issue (10): 27-31.doi: 10.16180/j.cnki.issn1007-7820.2021.10.004

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Design of Modular Parallel Current Sharing Single-Phase Inverter

LI Lin,XIE Ming,HUANG Song   

  1. School of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China
  • Received:2020-06-22 Online:2021-10-15 Published:2021-10-18
  • Supported by:
    State Grid Corporation of China(2018GW01)


With the rapid growth of power consumption, in view of the problem of inflexible design and maintenance of high-power inverter in the field of new energy grid connection and motor drive, this study presents a design scheme of modular inverter. To make the inverters in parallel can operate in phase synchronization and share the current equally, the STM32F407 processor is used to synchronize the drive and communication control of the modular inverter. To quickly transfer the phase information, the analog signal communication scheme is adopted, so that the voltage amplitude and phase of multiple inverters can be synchronized quickly, and the function of flexible parallel connection is realized to meet the needs of different power levels. Finally, the feasibility of the scheme is proved by simulation and actual prototype test, and better steady-state performance is obtained by optimizing the control algorithm.

Key words: full bridge inverter, phase synchronization, parallel current sharing, analog communication, STM32, PID, double closed loop control, simulation

CLC Number: 

  • TN702