Direct drive definition

Direct drive means a driving arrangement for a fan where the impeller is fixed to the motor shaft, either directly or with a co-axial coupling, and where the impeller speed is identical to the motor’s rotational speed;
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Direct drive means the type of driving arrangement where a clutch is not used and where coupling and decoupling of the driving torque is accomplished by energization and de-energization of a motor. Even though not employing a clutch, direct drives match the operational characteristics of part revolution clutches because the driving power may be disengaged during the stroke of the press.
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Examples of Direct drive in a sentence

  • Direct drive motors eliminate the need to replace belts, pulleys, or other limited life components.

  • Constructed of aluminum  Aerial PTO with Aerial Master Switch to control the aerials and the electrical system  H-style hydraulic stabilizers  Sufficient lighting around the aerial platform  Direct drive (PTO) portable generator  Tower lights installed to sufficiently light up the working area  Side mounted (drivers side) pump control panel  1500 gpm single stage fire pump  300 gallon polypropylene water tank  125 cu.

  • The present supply chain of a number of main components is not capable of producing the required size: • Pitch bearing • Direct drive generator or advanced gearbox technology allowing an economic design at required scale.

  • Deliverable D8.4 11 Transmission /Generator /Controller - Located at base of support structure, lowering centre of gravity (increasing stability) - Direct drive (no gearbox), reduction in number of components and probability of failure, lower O&M.