Today’s industry places high demands on innovative solutions and use of changing technology. The aim is to achieve not only increased productivity , reduce energy costs and machine availability, but improved energy efficiency and reduced operating costs as well. These demands can never be met with high-maintenance gearboxes, standard induction motors, and hydraulic systems – all of which are extremely inefficient. Investing in direct drive technology using HIGH TORQUE LOW SPEED Permanent magnet Synchronous motors / DIRECT TORQUE MOTORS instead of these conventional design approaches could greatly benefit in terms of costs and efficiency. Below are the applications and advantages what direct drive technology has to offer.
Conventional systems commonly have a mechanical transmission which can consist of gears, gearheads, belts/pulleys or cams connected between the motor and the load. With Direct Drive (HIGH TORQUE LOW SPEED Permanent magnet Synchronous motors / DIRECT TORQUE MOTORS ) technology, the mechanical transmission is eliminated and the motor is coupled directly to the load. This results in added advantages as :
The increased accuracy and efficiency of direct drive technology results in a higher quality product out of the machine:
Torque and current have direct relation and so torque can be easily determined and c ontrolled
Gears, belts, and other mechanical transmission parts break. By eliminating these parts and using direct drive motors, the reliability of the machine is improved. Gearheads require periodic lubrication and/or replacement in aggressive start/stop applications. Belts require periodic tightening. There are no time-wear components in a direct drive motor and consequently they require zero maintenance.
With direct drive motors / DIRECT TORQUE MOTORS, all you need is the motor and the mounting bolts. This often replaces many parts including brackets, guards, belts, pulleys, tensioners, couplings, and bolts, resulting in:
Inertia matching limitations of mechanical transmission systems often force machine designers to use a larger motor than would otherwise be required just to satisfy the inertia matching requirement. Such sizing conventions are not required with direct drive technology.
Machines with DDR motors have audible noise levels less than the same machine with a mechanical transmission.
Direct Drive / DIRECT TORQUE technology uses HIGH TORQUE LOW SPEED Permanent magnet Synchronous motors with feedback. The features of such a motor as compared to an induction motor are as below :