Branimir RUŽOJČIĆ: Electric motor with multilayer permanent magnets built into the rotor laminate profiled for a large contribution of reluctance to the total engine moment

1.  The Invention

 

Title  : Electric motor with multilayer permanent magnets built into the rotor laminate profiled for a large contribution of reluctance to the total engine moment

The problem the inventor(s) wanted to solve

 

Description. ¸

The electric motor with multilayer permanent magnets built into the rotor laminate profiled for a large contribution of reluctance to the total engine moment is a new solution – a highly efficient engine with the maximum momentum per volume unit. The essence of this solution is a specific form of the rotor, which has reluctance slots and three-layer segmented magnetic poles. By subdividing of the magnetic pole a more efficient functioning of the cooling medium was achieved, and with an unchanged amount of magnetic material the demagnetization limit was thus increased.

In order to additionally reduce the dimensions of the mechanical links and to influence the rotor’s magnetic circle by their magnetic saturation, the composition of the rotor was made of unit modules fixed by a mechanic cage, produced of a non-magnetic, low-conductive and mechanically solid material, which solves the problems of mechanical strength of large engines.

Following this principle, a range of 14 engines of various nominal moments was produced, tools were made, prototypes developed and a production launched. Once mathematically defined, this kind of the rotor laminate formula enables carrying out of mass production in a standard factory of medium and large synchronous electric machines, on standard machines and by using specific, technically easily made tools and devices.

The licence for the production of electric motors was sold to China, and there have been joint investments with the company Jiali Electric into production of these highly efficient electric machines with permanent magnets.


Presentation.
   
Fields of application

Advantages

Stage of development. production item.
Documentation available:  ( ) No   (x ) Yes
  leaflet, brochure, website,

 

 

Name  Dr.sc. Branimir RUŽOJČIĆ    

 

 

Photo.
Self introduction.
Owner of the invention? (Is it the inventor?)   ( ) No  (X) Yes

 

3.  Protection

 

Patent Status:
Patent protected - P20080304 A

 

 

Priority (date of the very first patent application)
Countries where it is in force

4.  Business intention

 

Cooperation
Selling the new product

5.  Contact

 

Dr.sc. Branimir Ružojčić  

Voltića 14

52100 PULA

CROATIA

Tel: +385 52 216-740

Mob.: +385 98 255 836

Fax: +385 52 507 599

Email: branimir.ruzojcic@pu.t-com.hr