Acronym:

Višefazni rezonantni električni aktuator 

From: 2016-06-01 To: 2017-05-31 (Completed)

BICRO 

PoC 

- 

prof. dr. sc. Damir Seršić

- 

A new concept of a multiphase resonant actuator (e.g. rotational or linear motor) without the iron core is proposed. Due to similarity laws, small electric motors have larger losses and unfavorable power-to-mass ratio when compared to the big ones. Proposed concept will reduce that drawbacks, probably resulting in a series of applications in small electric vehicles (bicycles, self-stabilizing vehicles, drones etc.), electric tools and home appliances. In a resonant iron-less transformer, magnetic fluxes of primary and secondary coils are weakly coupled when compared to the classic iron core transformer. If the coils are placed on a distance that is significantly lower than the wavelength, resonance of the primary and secondary circuits makes possible an efficient energy transmission through the near-field or evanescent electromagnetic (EM) waves, without significant radiation into the surrounding space. Known realizations are Tesla’s high-voltage transformer and Soljačić’s witricity system that is used for wireless charging of laptops and electric vehicles. We propose a novel multiphase resonant system in which phase and frequency relations will be forced by a specifically designed electronic circuitry, an embedded computer and advanced digital signal processing algorithms. Phase and frequency relations of the primary and secondary circuits determine the operation mode: the system can act as a transformer or as an electrical to mechanical transducer (linear or rotational actuator). Role of the iron core, which is a high conductivity magnetic circuit that concentrates the energy in a small air gap, will be substituted by the near-field resonance. Project phases are: 1.) design, schematics and computer simulation; 2.) buying equipment and components; 3.) design of electronic subsystems; 4.) realization of advanced digital signal processing algorithms; 5.) prototype assembly, demonstration and testing. Parallel activities are: 1.) prior art research, intellectual property protection; 2.) market research, commercialization strategy. It is necessary to test the feasibility of the idea, to test the system functionality, to conduct tests and to do design corrections. Knowledge and previous results of applicants give a chance for technical success; continuous growth of small motor applications is an opportunity for a commercial success.