What Is a Direct Drive Motor?
Many motor and controller companies use the term Direct Drive quite liberally (and at times incorrectly) to describe their systems to potential OEMs and system integrators. Direct Drive motors are simply motors that power a system (e.g. pump, fan blades, conveyor belt, door opener, etc.) directly without requiring a gearbox to achieve the necessary torque. Many systems have traditionally used induction motors with gearboxes, mainly to achieve their cost targets, but a new proprietary brushless DC motor design introduced by ETM in 2013 generates the necessary continuous torque without the gearbox.
The advantages of using true Direct Drive motors are many, including smaller size, less noise, higher reliability, larger speed range (less inventory), higher efficiency, and in most cases lower costs. The concept is simple – if you can remove the large, noisy, inefficient, and least reliable part of the system (gearbox) and meet the torque with the motor alone, your system will be better in every aspect.