Analysis of the core advantages of energy feedback units based on technical characteristics and actual application data:
1. Ultra-high energy recovery efficiency (core advantage)
97% power feedback rate: through PWM inverter technology to convert renewable electricity to the same frequency and phase AC power feedback grid, conversion efficiency exceeds 97%.
Significant energy savings:
Elevator/crane load saving rate of up to 20%-45%
Annual electricity savings after the popularity of the national elevator≈Xiaowan Underwater Hydropower Plant annual power generation (5.1 billion degrees)
2. Comprehensive economic efficiency improvement
Profit Dimension Specific Advantages
Direct electricity bill saving 100% renewable energy reuse, eliminate brake resistance heat loss
Equipment maintenance costs exempt from brake resistance replacement (annual cost≈15% of equipment price)
Indirect energy saving Reduce room temperature, reduce air conditioning energy consumption by about 30%
Case: Port crane annual feedback power up to 120,000 degrees, energy saving cost exceeds equipment cost by 30%
Improved system security and stability
Intelligent Protection Mechanism:
Bidirectional voltage adaptive control, automatic response to grid fluctuations (±10%)
Overcurrent/overheating/missing phase multiple protection, automatic disconnection in case of failure
Eliminate the risk of overheating:
Replace the brake resistor to eliminate the risk of high temperature in the control cabinet (elevator failure rate ↓ 40%)
Power grid compatibility:
Built-in filter for harmonic distortion (THD) <3%, IEEE 519 compliant
Fourth, technical performance upgrade
Dynamic Response Optimization:
DC bus voltage threshold trigger (720-760VDC), brake response rate <2ms
Multi-machine collaboration capability:
Supports parallel average flow operation to meet high power requirements (e.g. centrifuge groups)
Wide adaptability:
Compatible with permanent magnet synchronous/asynchronous motors, suitable for cranes/oilfield equipment/machine tools etc.
Environmental and Social Values
Carbon reduction: Reduces CO2 emissions by about 8 tons per 1,000 degrees of feedback
Grid pressure relief: on-site consumption of renewable energy to reduce transmission losses
Conclusion
The inverter support energy feedback unit has an absolute advantage in high-power scenarios with frequent braking through 97% ultra-high feedback efficiency and integrated cost optimization. Its extended value is reflected in improving system safety, reducing social energy consumption and promoting green manufacturing. Prior to conversion, the main need is to verify the grid quality (THD < 5%, voltage fluctuation ≤ ± 5%) to ensure stable operation.