Lenze introduces its new Smart Energy Recovery r700

Photo by Lenze SE

Lenze’s new Smart Energy Recovery r700 takes power recovery to new levels of economic efficiency, practicality and, most importantly, simplicity. The Hanover fair was the market début for the regenerative module in two power versions with 12/24 and 26/48 kW. Its special feature is the separation of supply and recovery paths, permitting their individual design and precision dimensioning customised to system needs. Regenerative power is scaled with the utmost simplicity over the parallel connection of several modules. Due to its outstanding efficiency of 98% and elimination of external filters, the Smart Energy Recovery very soon pays for itself and impresses with a compact design. Retrofitting existing machinery is not a problem.

In many cases conventional power recovery concepts do not make economic sense, because devices are difficult to install, too complicated to handle and investment costs far outweigh any power savings. Lenze’s new Smart Recovery Unit makes power recovery feasible, even in applications hitherto deemed unprofitable.

Special benefit: the recovery circuit is directly connected to an intermediate circuit of any scale, which in turn independently feeds regenerative power over a separate rectifier into the supply grid. The regenerative function is designed so that power is only returned to the grid when there really is too much power in the intermediate circuit. By decoupling the power supply and recovery lines, the frequency inverter’s uncontrolled bridge rectifier remains unchanged and the recovery circuit and necessary EMC measures need only be adapted to the regenerative power effectively required. The technical elimination of external filter components also makes the device considerably more compact and uses less space than conventional solutions. Furthermore, the regenerative module is particularly easy to handle: users do not have to adjust a thing, no parameters need to be set on the devices before deployment. Retrofitting in existing machinery is straightforward. Depending on the quantity of power recovered, the system pays for itself in around a year.

Typical implementation areas include storage and retrieval units or other lifting and handling equipment, in which a relatively high amount of energy is accumulated as the load is lowered or on test benches, where the test piece energy has to be permanently discharged as a matter of principle. Neither converting braking energy into heat or storing it in the system are options in applications of this nature, so recovering the generated energy and feeding it back into the grid via the new Smart Energy Recovery r700 is a genuine alternative.

For more information, please visit http://www.lenze.com.

• CID: 9595