Innovative motor topology saves space, weight

May 10, 2021 // By Christoph Hammerschmidt
Innovative motor topology saves space, weight
The Israeli startup EVR Motors has unveiled an innovative electric motor, based on a new patented topology, which it calls Trapezoidal Stator Radial Flux (TSRF). Compared to conventional designs the TSRF is only half the size and 10 % lighter.

The company has successfully developed and tested the first prototypes of its compact TSRF motor. "We managed to improve the basic design of the electric motor, which has remained much the same for the last several decades, while maintaining the traditional advantages of radial flux motors," explains Opher Doron, CEO of EVR Motors. Doron now expects its new motor architecture will be adapted to a wide range of vehicles in cooperation with automotive OEMs and Tier 1s. A production-ready motor is scheduled to be introduced to the global market later this year. 

EVR is currently in negotiations discussions with several OEMs and Tier 1s on conducting demonstrations and developing motors suited to their specific requirements.

The transformation of the industry has put huge pressure on automakers to match the internal combustion engine’s performance and cost with small, lightweight and price competitive motors.

EVR notes that its patented TSRF motor topology will enable superior power and torque density, as well as reduced production costs. EVR Motors says it can tailor the TSRF solution to most mobility and industrial applications, from two wheelers to cars and trucks and from Battery Electric Vehicles (BEVs) to Hybrid Electric Vehicles (HEVs). The TSRF technology can support a wide range of power and torque outputs, with voltage ranging from 48V to 800V, that are suitable for different power levels and for a wide range of speeds. 

EVR claims that it's neodymium-based motors perform significantly better than conventional Radial Flux Permanent Magnet (RFPM) motors at a significantly lower cost. The company also claims that its motor, when offered in low cost, rare-earth free, Ferrite-based versions, outperforms induction motors of a similar price range.  

EVR has recently conducted tests on a prototype traction motor designed for two- and three-wheel electric vehicles. The air-cooled motor delivered a best-in-class peak power of 17kW, and 40 Nm of torque, from a 2-liter volume, weighing  only 9kg, far

EVR electric TSRF motor

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