The invention relates to the technical field of
electric vehicle electronic control systems, in particular to a four-wheel low-speed
electric vehicle fault display
system, which is based on
CAN bus protocol construction, integrates high-precision total
voltage acquisition and instrument man-
machine interaction technologies, and innovatively defines a
motor controller and instrument standardized fault code
system. The technical problems of the four-wheel low-speed
electric vehicle in the aspects of potential fault pre-judgment and fault rapid positioning are solved, specifically, when a motor is not in
overcurrent, the flag bit at ID = 0 * 153
Byte1 Bit1 in a communication message is 0, when the motor is in an
overcurrent continuous fault, the flag bit is 1, an instrument displays the motor
overcurrent fault, a central control screen displays a motor
phase line connection diagram, and fault phase lines
flicker; maintenance personnel can conveniently and quickly know true causes of faults, formulate solution measures, maintain and eliminate the faults, and the maintenance efficiency is improved. Meanwhile, temperature compensation and fault early warning are linked in the
system.