The Distributed High Frequency Switching Source Charger Based On CAN Fieldbus

In this thesis, some accomplishment and work on distributed high frequency switching source charger based on CAN fieldbus are introduced.The design and realization of the switching source charger with phase-shifted zero-voltage-switching converter is discussed particularly, and a distributed system is designed to improve the dependability and expansibility.The nonlinear model about high frequency switching source charger is built and the way of realization of charger control system is analyzed. A control system combined superior and inferior, fuzzy controller and PID controller is applied to switching source charger. The comparison research improved the control quality of the system. The shortage of the traditional offline simulation is analyzed, and a new kind of way is suggested to study switching source charger by a digit and analog mixed system combined software and hardware. It is important to analyze and design the control system of charger.A kind way of current sharing composed of the droop method and the master-slaver method based on thermal stress and the random of the master is given, in this system an extra controller is attached; All the software and hardware on can fieldbus communication part have accomplished, which guaranteed the communication of the charger high reliability and high real-time. The source and types of the noise from switching power are analyzed and some methods are introduced to restrain noise and strengthen the system performance of interference rejection.