Phase Technologies SD Series - 1 INTRODUCTION

INTRODUCTION
SD & 2XD Series variable frequency drives (VFDs) are inverter-based devices that convert single-
phase AC power to three-phase variable frequency output to provide speed control for three-phase AC
motors. The drives offer advanced motor control features through an intuitive, easy to use interface.
The simplified block diagrams below demonstrate how the drive converts the incoming single-phase AC
power to DC, then utilizes an inverter module to generate three-phase variable voltage and frequency
output to control the speed of the primary motor.
Figure 1 – SD Series Block Diagram
Figure 2 – 2XD Series Block Diagram