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Regenerative drives - capture and utilize braking energy

ABB regenerative drives offer

  • energy savings
  • minimized downtime
  • optimized cost and space
  • maximized motor performance and efficiency

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ACS880 regenerative drives

ACS880 regenerative drives are suitable for applications with cyclic or continuous braking. Such applications include cranes, elevators, centrifuges, downhill conveyers and test benches.

Regenerative drives are capable of recovering energy and feeding it back into the network so that it can be utilized by other equipment. Everything needed for regenerative operation, such as active supply unit and LCL line filter are included in the drive. The active supply unit allows full power flow in both motoring and generating modes.

Simplified installation and energy savings

By feeding energy back to the network significant energy savings can be achieved compared to other braking methods. With mechanical or resistor braking energy dissipates as heat and is wasted. Handling of waste heat may be an issue if the braking power is significant and additional cooling might be required.

As no external braking devices are needed, the drive installation is simple and installation footprint is small. There is no need to add cooling to handle the heat generated by mechanical or resistor braking. Wiring is simple and less spare parts are needed.

Low harmonic content

The drive produces exceptionally low harmonic content and exceeds requirements set by low harmonic standards such as IEEE519, IEC61000-3-2, IEC61000-3-12 and IEC61000-3-4. The total harmonic current distortion is typically 3%.

Efficient energy utilization

The drive reaches unity power factor. This high power factor indicates that electrical energy is used to its full potential.

The drive offers a possibility for network power factor correction in order to compensate for low power factors of equipment connected to the same network. It reduces the need for additional power factor correction equipment, such as filters and large capacitor banks. It can also help to avoid penalty charges set by electrical utilities for poor power factors.

High performance drives

The drive is also suitable for demanding applications. It features direct torque control (DTC) as standard, enabling ultra-fast transition between motoring and generating mode. With regenerative drives it is possible to regenerate 100% of the power continuously.

Drives active supply unit is able to boost output voltage, which guarantees full motor voltage even when the supply voltage is below nominal. Voltage boost capability can also be utilized to overcome a voltage drop caused by long supply or motor cables or output filters.



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