Technology in modern electrical machines
Electric motors convert electric energy to mechanical energy, that are considered as the hearts of the electric vehicles. Modern electric motors are new types of electrical machines with new structures, new controllers, new materials, and manufacturing methods to meet the requirements of high performance and low costs. Our focus is on high performance electric motors without using rare-earth materials. Our speciality is brushless (wireless) excitation systems that can be used for Electrically Excited Synchronous Machines (EESM) for electric vehicles and superconducting electric motors.
EESM (high performance, no magnets)
Electrically Excited Synchronous Machines (EESMs) become a potential alternative to replace Permanent Magnet Synchronous Machines (PMSMs) in case of lacking resources of rare-earth materials. Our EESMs are optimally designed and able to reach the same volumetric torque density as rare-earth based PMSMs. The special feature of EESMs is its controllable excitation (magnetic fields). This enables high efficiency in partial load conditions and advoiding no-load magnetic losses.
Brushless excitation system
Brushless Excitation System (BES) are used to transfer excitation power to rotors wirelessly in rotating machines. It can replace the slip-rings/brushes in the excitation circuit of EESMs. Our BES can deliver power up to 5 kW under rotation speed of 18000 rpm. The secondary current can be designed for different applications, e.g. 300 A for superconducting motors. The efficiency of BES can reach 90-95% DC-DC.
Other electric motors
High performance PMSMs for traction applications, marine propulsions, and heavy-duty fan drive. Synchronous reluctance motors for self-starting or converter driven.