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NORD DRIVESYSTEMS is known for its high quality gear units, electric motors and frequency inverters and has developed from a gear unit manufacturer to a value chain partner for complete drive technology solutions. For some years now, the overall portfolio has included an industrial gear unit series for output torques of up to 282 kNm that are perfect for heavy-duty applications.
Together with NORD frequency inverters and motors, industrial gear units from the
modular MAXXDRIVE® system
form a powerful drive team, combining power and intelligence, for tailor-made drive solutions. The MAXXDRIVE® modular system offers a wide range of customised options for industry-specific special solutions. This series provides numerous versions and components that offer almost infinite possibilities for customisation. The application example of an electromechanically operated bascule bridge illustrates the performance and design possibilities of the NORD portfolio, from industrial gear units to electronic drive technology. High torques are required to open and close a bascule bridge weighing many tons. At the same time, it must be possible to precisely control the speed of the drives and thus the swing speed of the bascule bridge depending on its position. For example, due to the targeted speed reduction for the bridge's end (landing) position, damage to the structure and mechanics can be avoided.
Electromechanically controlling hundreds of tons
Bascule bridges can be hydraulically driven. In terms of system, energy and maintenance costs, a powerful and efficient electric motor with a robust industrial gear unit controlled by an intelligent frequency inverter is often the cheaper, more reliable and space-saving alternative. In one application case, the experts from NORD DRIVESYSTEMS designed an electromechanical drive based on two MAXXDRIVE® industrial gear units with motor-mounted frequency inverters. They drive a pinion that engages into a ring gear. This moves a lever mechanism via which the bridge is rotated around the support point. The two frequency inverters implement speed control of the drives. The process control synchronises the speed of two drives via torque adjustment.