| Title |
A Study on DC-DC Power Supply for Magnetically Levitated Vehicle |
| Authors |
Choon-Byeong Chung ; Kee-Young Jeon ; Hoon-Goo Lee ; Kyung-Hee Han |
| Keywords |
Maglev ; feedforward ; multi-loop |
| Abstract |
The author present a modified multi-loop algorithm including feedforward for controlling a 55kW step down chopper in the power supply of Maglev. The control law for the duty cycle consists of three terms. The first is the feedforward term which compensates for variations in the input voltage. The second term consists of the difference between the slowly moving inductor current and output current. The third term consists of proportional and integral terms involving the perturbation in the output voltage. This perturvation is derived by subtracting the desired output voltage from the actual output voltage. The proportional and integral action stabilizes the system and minimizes output voltage error. In order to verify the validity of the proposed multi-loop controller, simulation study was tried using Matlab simulink |