Technologies
When design engineers must choose between possible motor & gearbox styles for a suitable technology, SDT can provide valuable assistance. Our knowledge of the available products as well as solutions in the variety of applications can help OEMs cut time off the design schedule, thus speeding time to market and lowering product development costs.
SDT offer Electric Machine & Gearbox Design Engineering in several technologies:
Permanent magnet (PM) machines
PM machines have a higher efficiency as a result of the passive, PM-based field excitation. PM machines have the highest power density compared with other types of electric machines, which implies that they are lighter and occupy less space for a given power rating.
Brushless permanent magnet machines
Brushless machine - Two types, those with sinusoidal back emfs and armature current, known as P.M. sine wave machine drives (sometimes p.m. synchronous machine drives (PMSM) and those with trapezoidal back emfs and D.C. pulses of current, known as brushless D.C. drives (BDCM). In practice the 2 drive types have much in common.
Rare earth permanent magnet DC brush machines
In comparison to ferrite, rare earth magnets (Neo) have a significantly higher energy product which, when properly incorporated in a motor’s design, can provide the motor with an increased power output, an improved efficiency, reduced size or some combination of the three.
Induction motors
Alternating current (AC) induction motors have a long history of successful operation in industrial applications and have proved to be rugged and reliable machines.
Switched reluctance motors
In the switched reluctance machine both the rotor and the stator have salient poles. This doubly salient arrangement proves to be very effective as far as electromagnetic energy conversion is concerned. The rotor, which is made from machined steel, has no windings or magnets and is therefore cheap to manufacture.
Gearbox & Transaxle Drives
Gears are the most common transmission elements because they can transmit large torques with the use of small-sized motors. Hence, the systems are compact.