Linden Comansa on Product Improvement Drive
Improving and optimizing its products range has been an ongoing effort at Linden Comansa. Its new initiatives of developing Effi-Plus, a new hoist drive system can increase productivity of hoist operations up to 29%. The new system increases hoist and lowering speeds with light loads up to 70%, so the hoist cycle time is drastically shortened. Effi-Plus has been applied to the 24, 37, 50 and 65kW drives of the LC1100, LC2100 and LCL (luffing-jib) Series. It is being delivered since January 2011 and without affecting the price of any of the models.


The significant efficiency improvement of the new drive system developed by Linden Comansa, is based upon the application of cutting-edge control and motor design technology. This re-engineering work applied to the control and optimization of the system has allowed increasing the maximum hoist speed of the hook while keeping the current optimized and well-proven drive configuration (electric motor-brake, gearbox, drum, frequency inverter, brake resistor).
The exclusive advantages of Effi-Plus include:
- Increase of hoist speed and jobsite productivity up to maximum levels.
- Power and, therefore, energy consumption of the crane remains the same.
- The high performance has been achieved by developing specifically designed intelligent control techniques and not by means of complex configurations that may bring maintenance problems. The high reliability of the system remains the same.
- Since the configuration of the system is similar to the previous one, the user who knows the preceding system does not notice any differences and will not need specific training in the new system.
- Effi-Plus includes an exclusive control algorithm that optimizes acceleration and deceleration time and space while keeping smoothness under every circumstance. It ensures the best control of the hook even at the very high speeds that can be reached.
- The drum capacity has been increased in some of the mechanisms so the crane can now reach higher heights.
- When Effi-Plus is combined with the automated reeving change function, the crane operator can change, in a couple of minutes and on his own, the crane speed-load chart by selecting the appropriate reeving mode. The automated reeving change system allows him to adapt the crane load-speed features to the site working needs. As the system is fully automated, he can do it from the cabin seat and no manual operation or third party assistance is needed.