Minimally invasive right ventricular assist device MIRVADCopyright: © IEM
The afterload of a human heart can be lowered by a serial blood pump. Thus a worn out heart can regenerate itself by the aid of a ventricular assist device. The motor is developed by the IEM. The assist device MIRVAD contains a brushless DC motor which commutates contactless and wear-free. The smallish dimensions within the human heart lead to components with an outline dimension of a few millimetre. Hence, a slotless stator configuration is combined with a magnetic cylinder as a rotor to acquire a simple layout without cogging torque. The overall losses in the machine have to be as low as possible to maintain the normal blood temperature. A high rotational speed is required to achieve the desired mechanical power output.