Three phase electric motors are more efficient than single phase, but three-phase power isn’t available everywhere. Variable Frequency Drives are today’s answer. When compared to DC speed controls, they offer more features to increase equipment life.
To maximize efficiency of your gearmotor, avoid inefficient gearing. Right angle worm gear reducers can have efficiencies of 50% or lower, while spur and helical gears used in parallel shaft reducers are more typically in the area of 98%. Therefore, it pays to see if offset parallel shaft designs are available which offer higher efficiency.