AFE Regenerative Unit
Product Introduction
As a compact, fully integrated all-in-one solution, the AFE regenerative unit delivers exceptional low-harmonic performance and full regenerative capability, standing as the ultimate choice for superior power quality and maximum energy savings. Engineered for user-friendliness, it offers effortless setup and installation, guaranteed operational safety, and flexible parallel operation of multiple units with complete, high-precision current sharing. It is ideally suited for applications demanding rapid deceleration, precision positioning and dynamic braking, such as mine hoists, elevators, textile machinery, paper manufacturing equipment, centrifuges, industrial washing machines, wire drawing machines, proportional motion systems, and overhead cranes.
The ZONCN AFE Regenerative Unit (hereafter referred to as the AFE Unit) feeds energy generated by the motor during braking back to the power grid. It achieves reliable effective braking while recovering and reusing more than 95% of regenerative power. Equipped with full-suite overtemperature, overvoltage and overcurrent protections, the unit boasts core advantages of low noise, low harmonic pollution, and high power factor.
Comprehensive Technical Characteristics
| Specifications & Features | ||
| Key Performance Specifications | Input voltage | 3PH 380V±15% |
| Input frequency | 50/60Hz | |
| Output voltage | 580Vdc-780Vdc | |
| Controlled Rectifier Power Factor | ≥ ±0.98 (at rated load, grid voltage THD < 3%) | |
| Carrier frequency | 10KHZ | |
| Operating Efficiency | Above 97% | |
| Overload capacity | 120% rated current for 30 minutes, 150% rated current for 1 minute | |
| Controlled Rectification Harmonic Current | Less than 5% (at rated load, grid voltage THD < 3%) | |
| Customized Functions | Regenerative Power Monitoring | Regenerative active power is displayed as negative values, with an accuracy error of less than 5% at rated power. |
| Rectification / Regeneration Identification | Distinction between rectifier current and regenerative current: Rectification direction is positive; regeneration direction is negative. | |
| Measurement of Regenerated Electric Energy | For example, the regenerated energy within a set 1‑hour period can be recorded and viewed, with an accuracy within ±10%. | |
| Input and output | Digital input | 1 Channel (X1-COM) |
| Input and ouput | Digital output | 1 Relay Output (RA-RC) |
Outline and Mounting Dimensions
AFE-5.5~11G（5.5KW~11KW）
AFE-30~37G（30KW~37KW）
Schematic Diagram of Main Circuit Terminals
The regenerative unit terminals are marked with R, S, T, +, - ，
respectively. These terminals (R, S, T, +, -) can be connected to the corresponding terminals of the inverter after opening the top cover of the regenerative unit. The wiring diagram is shown below:
Operating Principle of AFE Regenerative Unit
The regenerative unit inverts the energy generated during motor braking and fed into the inverter DC bus into an AC sine wave that is synchronized and in-phase with the power grid, thereby feeding the electric energy back to the grid.
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