The invention discloses an instantaneous rotating speed real-time compensation method for a
motor test board, which comprises the following steps of: firstly, carrying out self-inspection on equipment, then testing by using a qualified motor, judging the reasonability of an error, then carrying out measured value compensation on a component, continuously carrying out rotating
speed test on the compensated
test board, and carrying out real-time compensation on the instantaneous rotating speed on the basis of a secondary test result. The angle error represented by the number of teeth of the fluted disc is reasonably compensated, real equipment to be tested is tested, and whether the equipment to be tested is qualified or not is judged. According to the invention, through the core idea of variable control, a qualified motor is taken as a
test object, numerical compensation is carried out on components of a
test bench, the main compensation is the influence brought by the instrument reaction
time difference, and then the compensation amount of the fluted disc angle is derived according to the compensated numerical value. The influence on errors caused by oscillation and
distortion generated in the processes of a fluted disc structure on a
motor shaft, installation conditions and rotation is eliminated, the finally measured instantaneous rotating speed of the motor is compared with a
product standard requirement to judge whether the instantaneous rotating speed is qualified or not, and the result is more scientific and accurate.