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The paper summarizes the most important advances of the used crane control technology in perspective of semi-automatic/automatic operation of Electrical Overhead Travelling (EOT) cranes. Those cranes are often used in the heavy industrial environment, typically steel-mill applications and crane container handling. Most of them need sensor and/or sensorless technology in order to realize specific tasks...
The paper presents a method of estimating the transient inductance and rotor resistance of an induction machine in a self-commissioning scheme. The method is based on two frequency-domain tests, with injected frequencies that are selected by using special criterions. These are established based on the standstill frequency domain analysis. Identification results for large machines of different sizes...
Fast and accurate positioning and swing minimization of the containers and other loads in crane manipulation are demanding and in the same time conflicting tasks. For accurate positioning, the main problem is nonlinear friction compensation, especially in the low speed region. In this paper authors propose position controller realized as hybrid controller. It consists of the conventional linear state...
An AC slip-ring motor speed estimation in the industrial crane control system is realized. Speed estimation is based on the rotor voltage frequency measurement. For the hardware implementation, ADMC300 DSP based unit is used. Speed estimation unit is included in the modular structure of the industrial crane control system. Authors investigate speed estimation algorithm solutions and implication of...
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