基于LabVIEW的异步电机转子断条检测

his paper addresses a new approach based on digital filter, zoom-FFT, Rotor slot harmonics based slip estimation to detect rotor bar fault online. Because the characteristic frequency ingredient\'s peak-to-peak value is small, and close to the fundamental component, it is easily submerged by fundamental component. The zoom-FFT of stator current is firstly calculated. Then design a digital filter to filter the fundamental component. Rotor slot harmonics based slip estimation can find the characteristic component and correctly distinguish rotor bar breaking and loan oscillation. Result of numerical simulation and test show that the approach is valid and effective.