| Title |
Zero Power Levitation Control of Hybrid Electro-Magnetic Levitation System by Load Observer |
| Authors |
김윤현(Kim, Youn-Hyun) ; 이주(Lee, Ju) |
| Keywords |
Zero power Levitation control ; hybrid electro-magnet ; load observer |
| Abstract |
This paper introduces the scheme that improve the control performance of electromagnetic levitation system with zero power controller. Magnetic levitation is used widely, but the electromagnetic force has nonlinear characteristics because it is proportioned to a square of the magnetic flux density and it is in inverse proportion to a square of the airgap. So, it is complicate and difficult to control the electromagnetic force. Besides, it is more difficult to control if the equivalent gap is unknown in case of zero power control. Therefore, this paper proposed the hybrid electro-magnetic levitation control method in which the variable load is estimated by using a load observer and its system controlled at a new zero power equilibrium airgap position. Also it is confirmed that the proposed control method improve the control performance through simulation and experiment. |