From hydro wizard to the ECMa63

The base of the innovative water streaming system hydro wizard63 is the stator lamination from the new ECMa63. The hydro wizard is used to generate laminar flows in aquariums, ponds or other bodies of water. The energy efficient movement of water is a basic function. This elminates dead zones in the water. With the controller it is possible to generate wave simulations, in which both wave height and length can be adjusted. The pump can simulate rivers, tides, surge and waves. Adding oxygen or CO2 can be controlled efficiently. The hydro wizard is designed for use in fresh- and saltwater.

For this particular product that is the origin of the revised versions of the brushless motor series ECM63, called ECMa63 in future. The "a" stands for a new winding technology that was at the end of last year first introduced for the hydro wizard. Now this technology will be available in the next year for the industrial engine range.

Function of the hydro wizard:
The movement of the impeller generates an area of low pressure, which pulls the water from the back through the basket and pushes it out the front over the fins of the stator.

 

Development of the prototype of an active drive system for prostheses and orthoses

Generally, prostheses replacing the function of the missing extremities are used for patient-centred care of amputations at the extremities. However, in particular the motor abilities can only be restored with extensive limitations so far. This is especially caused by the fact that the muscular activity cannot be replaced yet and consequently the active movement of joints, for example, cannot be simulated.
In this project, approaches for this problem are tested, an actively powered, energy-efficient drive unit which can be controlled according to the situation is developed and a prototype for a lower leg prosthesis with an actively powered knee joint is designed and tested.
Several partial developments are performed in a syndicate consisting of six partners and supported by a potential system manufacturer. The ISW intends to develop anticipating control algorithms for discontinuous boundary conditions.
For this purpose, the mechanical and electric components of the actively powered knee prosthesis that are currently being developed are described in a simulation model. In addition to a realistic illustration of the motor, further factors such as losses in the gear as well as the real incline of the knee angle or the knee moment were examined.
By use of the model, a controller has been developed which optimally complies with the previously prepared requirements for controlling the knee angle.
At the same time, faults, such as a volatile change of the load torque are balanced smoothly. The controller also dynamically adapts to changing load profiles.
A further step within the project is the development of an integrable hardware platform for controlling and adjusting the prosthesis as well as the implementation of the controller at this platform.
A prototype of the knee prosthesis with the anticipating control will be designed and commissioned until the end of the project.

Created by: Dipl. Ing. Igor Laptev
E-Mail: Igor [dot] Laptev [at] isw [dot] uni-stuttgart [dot] de

Syndicated partners: Fraunhofer IPA, Kählig Antriebstechnik GmbH, ISW Uni Stuttgart, VMR OHG, CONTAG GmbH, ISG Industrielle Steuerungstechnik GmBH

This project is funded by the Federal Ministry of Economics and Technology based on a resolution by the German Bundestag