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Stores braking energy

02 January 2015

The Drive Power Solution energy storage system from SEW-Eurodrive stores the braking energy during load cycles and releases it again to an application during motor operation. This minimises the energy requirements of the systems, reducing mains uptake, and thereby also infrastructure costs.

The system can be used for both stationary and mobile systems. It stores electrical energy directly in the unit near the drive and releases it again immediately when required. It can be scaled according to the needs of the application or project. It has a modular construction throughout, and consists of an energy interface, energy management system and innovative storage units based on double-layer capacitors.

The energy management system is an integral component of the local MOVI-PLC drive controller. Depending on the travel cycle, it calculates in advance the amounts of energy occurring and the power requirements. This data controls the energy interface, which simultaneously determines and monitors the charging and discharging cycle of the storage bundle using DC/DC conversion. When using Drive Power Solution in intralogistics and production, the lower mains uptake means that infrastructure costs can be reduced significantly while also minimising the energy requirements of the systems.

In stationary drives with a continuous mains supply, the storage is used in peak power operation. This concept can save applications with cyclically changing load profiles as much as 48% in energy requirements by storing regenerative braking energy and feeding it back to the drive during motor operation. Using Drive Power Solution reduces peak loads by up to 92%, which allows a considerable reduction in the connected load. The storage unit also improves the reliability of supply and the availability of a system, because it can be returned to a safe state even e.g. when there is a power interruption.

In mobile applications, the Drive Power Solution energy storage system gives users even greater independence. Forklift trucks or shuttle vehicles can rapidly be fed energy using contact or inductive energy transfer while traveling on power tracks, thereby enabling them to then navigate independently away from fixed routes. In addition, the use of double-layer capacitors in the MOVI-DPS energy storage units gives them an impressively high service life. Unlike vehicles with conventional batteries, the comparatively high cycle stability of this storage technology significantly reduces the maintenance outlay. The MOVI-DPS storage units with high IP54 protection class and robust construction were specifically developed for decentralised or mobile use in industry.

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