Low Harmonics Design
The unique low-harmonics design sets the SED2 VFD Drive apart from its competitors. While other drive manufacturers use filtering devices to control harmonics, which add cost and complication, the SED2 VFD Drive design provides a new method of reducing the input line harmonic currents without the addition of extra components. The SED2 drive uses lowered DC link capacitance to minimize harmonics in a cost-effective manner.
Current Wave Form of Typical 6 Pulse Drive vs. the SED2 VFD
At the input terminal of a PWM 6 Pulse Drive, THD can be in excess of 120% without any filtering. The SED2 produces only 29%.