| Abstract |
Sensorless speed control system with slip-ring AC motor is a highly developed, wellproven system
for heavy duty tasks especially in the field of industrial cranes and another heavy duty material
handling systems. In situations where there is no tachometer or incremental encoder as a speed
feedback devices, actual speed information is realized via rotor voltage frequency estimation
(RVFE). Using line frequency as a reference, the fundamental component of the rotor frequency
gives the slip of the motor, which determines the speed in digital form. |
