Electric motors will become easier and more efficientJuly 5, 2019
German researchers have developed a node with a polymer housing and direct cooling.
A group of researchers of the Fraunhofer German Institute of Chemical Technology (ICT), together with the oldest technical university in Germany – Karlsruhe Institute of Technology – has developed an electric motor with a polymer housing. Scientists have been able to improve the cooling unit, which increased its efficiency.
The DEmiL research project envisages the development of an electric motor with an integrated lightweight housing and direct cooling of the stator and rotor. “The electric motor consists of a rotating rotor and a fixed stator,” explains Robert Martin, an employee of the Institute of Chemical Technology. “Electricity passes through the stator’s copper winding, and it is here that more losses occur. Our goal is to completely get rid of them. ”
In order to prevent overheating, conventional electric motors are enclosed in a metal case connected to a cooling clutch filled with cold water. ICT researchers propose to act differently: they replaced round wires with flat ones, which made it possible to create cooling channels inside the stator itself, as well as to increase thermal efficiency. The dispersion of heat in the place where it is formed, allowed to abandon the metal body – it was replaced with a body of thermosetting plastic, fiber-reinforced. The efficiency of such a motor was about 98 percent.
Last December, Honda made fluoride-ion batteries with solid electrolyte work at room temperature. In its current development, solid-state fluoride-ion batteries require high temperatures for normal operation – more than 150 degrees Celsius.
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