EC 303 series is a double conversion three phase input-three phase output industrial grade Online UPS with regenerative loasd handling.
When rotating element of a motor runs faster than its voltage drive control (command), then the motor begins to act as generator and energy pumps back to the source. The conventional Online UPS cannot absorb this energy and the DC bus voltage starts increasing and leads to failure of DC capacitor and switching device.
The re-generative braking energy is produced in the following conditions,
Quickly decelerating a high inertia (mechanical arm, flywheel).
Controlling the speed of a load moving vertically downwards (Milling, cutting, declining conveyor)
Sudden drop in load torque. (Drilling operation, industrial saw)
Repetitive acceleration and deceleration to a stop.
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