The application provides a motor Hall
signal high fault-tolerant acquisition device and method, and belongs to the technical field of
motor control. The device comprises: a Hall acquisition circuit, used for acquiring original three-phase Hall signals; an auxiliary acquisition circuit, used for monitoring motor operating parameters and generating three-phase auxiliary position signals; a core
algorithm circuit, used for, when it is determined that the original Hall signals have failed, reconstructing compensation Hall position signals based on the three-phase auxiliary position signals and a preset motor
physical model, and combining the normal Hall signals to generate final three-phase Hall position signals; and a Hall
signal output circuit, used for conditioning and outputting the final signals. The application solves the problems of the existing Hall
signal fault-tolerant scheme, such as limited fault-tolerant capability, increased
system complexity and poor universality. By solidifying fault diagnosis and
signal reconstruction in independent hardware, correct position signals can be continuously output even when all Hall sensors fail, thereby greatly improving the reliability of the
motor system, simplifying the main
control software design, and having good universality.