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The defense date of the thesis is 2007-08-08
The current date is 2019-05-23
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URN etd-0808107-120511 Statistics This thesis had been viewed 2761 times. Download 6 times. Author Te-lung Shih Author's Email Address No Public. Department Electrical Engineering Year 2006 Semester 2 Degree Master Type of Document Master's Thesis Language English Page Count 131 Title AN ELECTRONIC BALLAST OF AUTOMOTIVE HIGH INTENSITY DISCHARGE LAMPS WITH FUZZY PI CONTROL DESIGN Keyword HID BALLAST FUZZY PI FUZZY PI BALLAST HID Abstract This thesis presents a complete design of Automotive High-Intensity-Discharge lamp (HID) ballast. It uses OSRAM 35W low wattage HID lamps as the study object. The ballast controller circuitry, built in conventional analog circuit control, is complex and cumbersome. Thus, a digital controller is introduced to offer unparalleled flexibility and programmability. In this research, it also describes different advantages in applications by using digital control.
A novel dc/dc Boost converter topology is presented in this thesis. It boosts the battery power of 12V all the way up to the 102V, which is the working voltage for a HID. To combine the Feed-Forward control, it will improve the conversion system performance and to get better current conversion ratio, due to the reason of input voltage and the operating frequency are both changed. The ballast/ HID lamp system stability controller is managed by a digital signal processor (DSP). This controller is a hybrid controller which controls current feedback and power feeding in the control loop. The current feedback section has rapid response of the current regulation. The power feeding part is achieved by the PIFLC controller which uses product-sum-gravity method, and simplify fuzzy reasoning to search the properly control parameters; resulting the constant power can be within control zone.
With verifications by the circuit simulation and real life prototype, the research demonstrated the ballast successfully, and it illustrated the requirements of the control function does indeed achieve a smooth power process and fast turn-on of the lamp.
Advisor Committee Hung-Ching Lu - advisor
none - co-chair
none - co-chair
Files Date of Defense 2007-07-17 Date of Submission 2007-08-08