Delta's AFE2000 series active front-end (AFE) replaces a traditional braking resistor by converting excess heat into reusable power that can be supplied back to the mains. It is designed for a wide range of applications and achieves outstanding energy-saving results.

An active front-end is a controllable rectifier which can provide bidirectional power exchange between AC and DC power. It can also regenerate reusable power to the mains to reduce the cost of power. The AFE uses PWM modulation to greatly reduce distinctive peaks of current and to form perfect sine wave current. The power factor is corrected up to one; 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, saving the cost of additional electrical equipment for better power quality. The AFE also offers stable power quality unaffected from mains power fluctuations and can be applied to a serial connection.