Abstract
A method for calculating the power demand of the hoist motor in Rubber-Tyred Gantry (RTG) cranes has been developed in order to measure the energy consumption in a typical lift cycle. From measurements taken at the Port of Felixstowe it has been observed that the peculiar geometrical characteristics of the hoisting mechanism causes the power demand to increase with the container height in constant speed conditions. By using information extracted from the crane's schematics and trigonometry it has been possible to calculate the potential energy increase given the weight and vertical position of the container. In addition, the torque load on the hoist motor and the vertical speed of the mass have been calculated, allowing for the modelling of the hoist motor power consumption when lifting containers with constant rotational speed.
Original language | English |
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Title of host publication | 2015 IEEE Industry Application Society Annual Meeting |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
Pages | 1-6 |
ISBN (Electronic) | 978-1-4799-8394-0 |
ISBN (Print) | 978-1479983957 |
DOIs | |
Publication status | Published - Jan 2016 |
Event | 2015 IEEE Industry Applications Society Annual Meeting - Addison, United States Duration: 18 Oct 2015 → 22 Oct 2015 |
Conference
Conference | 2015 IEEE Industry Applications Society Annual Meeting |
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Country/Territory | United States |
City | Addison |
Period | 18/10/15 → 22/10/15 |
Keywords
- load flow analysis
- load modeling
- mathematical model
- mechanical systems
- power system modeling
- containers
- torque
- cranes
- induction motors
- approximation methods
- power demand