Feedback units are energy-saving, but must meet grid quality requirements; braking units are only suitable for low-cost, short-term braking or poor grid conditions.
Working Principle
Brake unit: The excess electrical energy generated when braking is consumed by the resistance, which is converted into thermal energy release.
Energy feedback unit: the braking energy is converted into AC at the same frequency and voltage as the grid, which is returned to the grid for reuse.
Differences in energy efficiency.
Brake unit energy consumption is high, electricity is wasted;
Feedback unit energy saving, can reduce the operating costs of the system.
Applicable Scenes
The brake unit is suitable for short-term braking or low power occasions;
Feedback units are suitable for frequent braking or high-power equipment (e.g. cranes, elevators).
Cost and complexity.
Brake unit structure is simple, low cost;
Feedback units require grid synchronization technology, which is expensive but has significant long-term benefits.
Heating Requirements
Brake units require additional cooling design;
The feedback unit has no problem.
Summary: the feedback unit is more energy-efficient and environmentally friendly, the brake unit is economical and easy to maintain, and the selection needs to be weighed according to the actual needs.