Automatic current digital control method based on CAN bus communication

• Main Authors: WU SICONG, WANG CHUNJUN, LI FUGEN
• Format: Patent
• Language: English
• Published: 16.09.2015
• Subjects: CONTROLLING; PHYSICS; REGULATING; SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES

The invention discloses an automatic current digital control method based on CAN bus communication. In a main-driven competition mechanism, each of the N+1 parallel power supply modules publishes self information through CAN communication; each power supply can compete to be the main machine or the driven machine; about the main and the driven machine based on the competition mechanism, the main machine gives up a current feedforward ring, and takes an output positive-negative parallel bus pressure as the reference, and adjusts self output load current through a PID controller; the driven machine is added to the current feedforward ring, and adjusts self output load current to make the self output current value the same with the load current value of the main machine; each power supply module controls its load current itself to realize automatic current; if some power supply module has a fault, the power supply module quits work automatically, and the rest machines compete for main-driven machine again, which has no influence to the current sharing control system and the power supply system at present, overcomes the technology defect of redundant N+1 backup to the parallel power supply system in power supply technology field.