What are regenerative drives?
How do regenerative drives work?
What regenerative drives offer?
- Substantial Energy Savings Regenerative drives have the capability of recovering and feeding back energy into the electricity grid so that it can be reused by other power-requiring equipment. Everything required for this operation, like LCL line filter and active supply unit are fitted in the drive. It is the work of active supply unit to ensure full power flow in both the modes (motoring and generating). By feeding back the energy to the grid, substantial energy savings are achieved as compared to other traditional braking methods. In case of resistor or mechanical braking, energy dissipates in the form of heat and is wasted. Usually, handling of dissipated heat is an issue when braking power is significant. In such cases additional cooling may be required.
- Simplified Installation The installation of regenerative drives is simple as they do not require any external braking devices and the installation footprint is also small. Also, there’s no need to add any cooling to handle the heat generated from resistor or mechanical braking. These drives require less spare parts and their wiring is also simple.
- Maximized Efficiency and Performance Regenerative drives reach unity power factor. This power factor basically indicates that the energy is utilized to its full potential. These drives offer a possibility for correction of network power factor in order to counterbalance the low power factors of electrical loads connected to the same network. By doing so, they reduce the requirement for additional power factor correction equipment like large capacitor banks and filters. The active supply unit has the ability to boost the output voltage, which ensures full motor voltage even when supply voltage is low. Regenerative drives also help the building owners to avoid penalty charges that are set by electrical utilities for low power factors. These drives are most suitable for demanding applications. With direct torque control as standard, regenerative drives enable ultra-fast transition between the motoring and generating mode, and in way make it possible to regenerate almost 100 percent of the power continuously.