| Title |
Optimized Design of Rotor Considering Cost-Reduction of Small BLDC Motor for the Water Pump |
| Authors |
김회천(Kim, Hoe-Cheon) ; 정태욱(Jung, Tae-Uk) |
| DOI |
https://doi.org/10.5370/KIEE.2013.62.4.495 |
| Keywords |
BLDC(brushless DC) motor ; Ferrite ; Rare-earth ; Water pump |
| Abstract |
In the present study, a BLDC motor for a pump in which a neodymium PM is replaced with a Ferrite PM has been developed in preparation for the cost increase and to ensure the stability of the resource supply. One of the currently used motors for pumps is a BLDC motor having an interior PM wherein a rare-earth PM is adopted. However, a BLDC motor for a pump is designed to have large airgap because of the use of a waterproof insulator according to its structural characteristics, and therefore, a SPM structure is suitable. Hence, an SPM BLDC motor in which a Ferrite PM is used is designed. Nevertheless, the use of Ferrite instead of rare-earth materials causes a deterioration in the performance of the electric motor, such as a decrease in the BEMF and the maximum power of the motor and the irreversible demagnetization of the PM. In order to mitigate such disadvantages, an optimized design of the BLDC motor is developed by changing each design parameter and by improving the electromagnetism structure. |