ALL libraries (COBIB.SI union bibliographic/catalogue database)
13.
Osvajanje tehnologij izdelave sestavnih delov motorjev iz stiskanih in brizganih mehko in trdomagnetnih kompozitov in njihovo uvajanje v redno proizvodnjo : zaključno poročilo o opravljenem delu predkonkurenčno raziskovalno-razvojne aktivnosti tehnološkega projekta 2002-2003
The aim of the project is to develop a technology of manufacture of special PM motors and their vital parts (rotors and stators) from compression and injection moulded soft, as well as hard magnetic ...composites. In the frame of the first project year, complete chemical, morphological, mechanical and magnetic characterization of rare earth powders/magnets and iron based soft magnetic powder mixtures/composites (SMC) was adopted. Four different prototypes of NdFeB- based multi-pole (24) rotors were developed in the frame of the project. These rotors are appropriate for the construction of pancake type PM DC small stepping motors. A very complex procedure of their magnetising was also developed including manufacture of appropriate, highly loaded magnetizing coils. Four different prototypes of 48-pole PM stepping motors with NdFeB plastomagnet rotors were made, as well as successfully judged and homologised at a potential customer and user, respectively. In the development and manufacture of prototype motors, all technical and control documentation, powder mixtures pressing procedures, tooling, magnetising coils and apparatus, rotor anticorrosion protection, blanking and stamping of motor cases, joining of motor parts and final assembling is included. Complete characterisation (magnetic, torque and power) of motors was performed. Measurements show that basic motor characteristics are approximately 20% better in comparison with competitors. Development of a universal synchronous AC motor for domestic and personal applications (lemon wringers, mixers, shavers etc.) with a SMC stator core and a two-pole PM rotor has also been performed. In the frame of the project, only the sheet steel (lamellar) stator core was substituted by the SMC one but the sintered Sr-hexaferrite-based rotor is still used. The characteristics obtained with this new SMC stator-based motor are promising but still has to be optimised. The finite element method based numerical simulations were performed in order to optimise and redesign the existing motor with the new stator and rotor. Sr-hexaferrite-based rotor is substituted with injection moulded NdFeB magnet. Therefore, a development of injection moulding of NdFeB based plastomagnets has also started. However, the main problem is the cost of new materials. Cost analyses showed that newly developed motor with SMC stator and NdFeB rotor is still to expensive for this type of motor. Therefore, the additional optimisation of motor (redesign, air gap, hybrid rotor composition, etc.) is carried out and niches on the market in the field of motor applications with higher added value have to be found.
Type of material - research report
Publication and manufacture - Ljubljana : Inštitut za kovinske materiale in tehnologije, 2004
No library within the COBISS.SI system holds a copy of this material.
Shelf entry
Adding material to shelf was successful.
Adding material to shelf failed.
It was not necessary to add the material to the shelf.
Bibliographic material was successfully added on shelf.
Adding bibliographical material on shelf was not successful.
Material is already on the shelf.
Permalink
URL:
Impact factor
Access to the JCR database is permitted only to users from Slovenia. Your current IP address is not on the list of IP addresses with access permission, and authentication with the relevant AAI accout is required.
Year
Impact factor
Edition
Category
Classification
JCR
SNIP
JCR
SNIP
JCR
SNIP
JCR
SNIP
Impact factor
Select the library membership card:
DRS,
in which the journal is indexed
Database name
Field
Year
Links to authors' personal bibliographies
Links to information on researchers in the SICRIS system
Subject headings in COBISS General List of Subject Headings
Select pickup location
The material from the parent unit is free. If the material is delivered to the pickup location from another unit, the library may charge you for this service.
