The Active Front End (AFE) is a controllable rectifier. Its advantages include bidirectional power exchange between AC and DC and the feed of reusable power back to the mains. The AFE uses PWM modulation to reduce current peaks and form perfect sine wave current. The power factor is corrected up to 1. The ratio between load capacity and power capacity is 1:1. In addition, the AFE eliminates high-order harmonics and provides very low harmonic current, THD<5%, while improving the power factor. Customers to not need to purchase additional electrical equipment for better power quality. The AFE also offers stable power quality, unaffected by mains power fluctuations, and supports serial connection.

Delta’s innovative AFE2000 is the product of years of experience in AC motor drive development. Designed for a wide range of application, this unit achieves outstanding energy-saving results. The AFE2000 converts excess heat (otherwise wasted) into reusable power that can be supplied back to the mains. The AFE2000 is yet another Delta product for improved efficiency and productivity. It is another step on our mission "to provide innovative, clean and efficient energy solutions for a better tomorrow".



  • Large-inertia load applications: roving machines, horizontal spiral centrifuges, drilling machines.
  • 4-quadrant load applications: cranes, cargo elevators, passenger elevators, oil production machines.
  • Quick braking applications: machine tools, high-speed spindles, bag-making machines.
  • Long-term feedback energy applications: wind power systems and water power systems.
  • DC power supply applications: logistics and storage systems, wind power systems, LED lighting systems.
  • Provides excellent power quality for the communication transmission systems of Power Line products.
  • Overhead Traveling Cranes
  • Elevators



  • Energy saving with AC/DC dual power flow control and corrects power factor up to 99%.
  • Replaces traditional braking resistor for cost savings, space savings, and energy savings.
  • PWM control substantially reduces peak of harmonic current wave and forms perfect sine wave current.
  • IEEE STD.519–1992 standard for harmonic current distortation of less than 5%.
  • Constant DC bus voltage that is not influenced by mains voltage fluctuation.
  • Supports multiple DC bus installation
  • Outstanding Energy Saving Results

    • Controls harmonic distortion to less than 5% and corrects the power factor up to 99%.

    • As a replacement for traditional brake resistors: A high-watts brake resistor is usually applied to a traditional AC motor drive to absorb the excess regenerative energy generated by motor spinning and frequent braking, and then dissipating the excess energy as heat. Using brake resistors as an excess energy solution not only creates additional hardware but also occupies more space. The Delta AFE2000 series provides a new solution: instead of dissipating regenerative energy as heat, it converts regenerative energy into reusable electricity and sends it back to the mains, which reduces total energy consumption. The AFE2000 series is a cost saving and environmentally-friendly product.

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