engleski

Automatic On-Line Optimization of AC Wound Motor's Rotor Resistors in Advanced Industrial Crane Controller

Digital integrated industrial controller is a specially designed speed control system for the cranes and another heavy duty material handling systems. It is intended for wound (slip-ring) motors and fully supports stator voltage control, rotor step switching, positioning, brake control and another application functions. Basically, the controller performs stator and rotor control functions. Stator control is related to the stator voltage control (motor torque control), using phase controlled AC/AC converter. The rotor control includes rotor resistor optimization logic, which changes the amount of the external added resistors in the rotor circuit by means of the rotor contactors. In this paper special attention is paid to the automatic rotor resistor optimization logic, realized in the crane application program in separate software module. All the application functions are running on the MC68332 microcontroller. Using process I/O digital outputs, main control board directly drive rotor contactors which optimize rotor additional resistors. The control system also includes protective functions, necessary for crane motor drives application.

AC/AC converter; Industrial applications; Speed control; Torque control; AC wound machine; rotor resistors switching

nije evidentirano