Heimotion's dynamic servomotors are permanent magnet three-phase synchronous servomotors. With permanent magnets made of neodymium-iron-boron, performance values could be achieved that are up to 40 percent higher than the highest rare earth magnets known and used to date. This enables both new technical solutions and a reduction in the amount of magnetic material used while maintaining the same system performance. These motors are also characterized by robustness and energy efficiency. The manufacturer has redesigned the geometry of the rotor package, resulting in a reduction of the coil heads and the packing height, which leads to an extremely compact and highly dynamic servo motor.

As the third module in the Heimotion series, the manufacturer has reduced the overall length of the Heimotion Dynamic series by around 20 percent, which was achieved through concentrated winding (winding around one tooth). Copper layers are automatically applied over individual teeth using a flyer winding without crossovers. In this way, the cross-sectional area of the slot is optimally utilized. The efficiency is estimated at up to 96 percent. Compared to the existing and already optimized series, the winding heads are even shorter thanks to this type of winding. Due to the 35 percent reduction in the moment of inertia, high accelerations are possible. Heidrive was able to avoid the deterioration of the cogging torques associated with this winding technology by means of FEM calculations; in fact, it was even possible to reduce the cogging torques by a good 50 percent by setting individual magnet segments and optimizing the pole transitions. This results in cogging torques of less than one percent of the stall torque.

The new HMD series was also accompanied by an expansion of the torque gradation. The manufacturer has supplemented the gradation of stall torques so that the desired torque can be realized by both motors when there is a size difference between two motors. For one and the same torque, both a long, slim and therefore dynamic motor and a larger but short and therefore compact motor are available.

The motors are installed, for example, in automated milking systems, packaging machines, positioning systems and test systems for the automotive industry. As high-resolution Hiperface DSL interfaces can be used, practically any position requirement can be conceived and implemented. In order to control the heat generated, an integrated KTY sensor monitors the temperature of the winding in the motor. pb