In Direct Drive, the motor is connected directly to the working machine. In this way, direct drives avoid most of the mechanical transmission elements between the motor and the working machine. There are no components such as belts or transmissions, for example. The impact of wear, noise, maintenance costs and mechanical placement is significantly reduced. The number of parts and the associated space requirements of the drive system are significantly reduced.
Direct drive motors are well-suited for high-speed acceleration applications involving quick starts and stops. This is because only a low torque is required to accelerate the motor compared to a geared motor with a low torque-to-inertia ratio.
It can also be supplied as a frameless motor. “Frameless” refers to a motor without a frame, housing, bearings or feedback system. As a result, system suppliers can integrate the motor into the application itself, eliminating the need for additional interfaces. This of course reduces the cost of ownership. Direct drive motors can be used in a variety of applications, such as those requiring high positioning accuracy. These frameless motors are also used in situations where compactness, light weight, maximum power and optimum speed control are required.
The high system rigidity of the direct drive enables very precise positioning. High acceleration values ensure much shorter cycle times. Direct drives are primarily designed with permanent magnet excitation and stand out thanks to their high torque (torque motors) and/or high thrust (linear motors). The FGB direct drive already has maximum torque and maximum thrust from standstill and can be used over the entire rpm and speed range.