| Summary: | 碩士 === 國立虎尾科技大學 === 電機工程研究所 === 98 === The main study of this thesis is to understand and develope a programmable pulse-width waveform for eliminating the harmonic noise and optimizing the driver unit in order to improve the usability of Electro Luminescent (EL) Panel.
The selective harmonic elimination pulse-width modulation(SHE-PWM) is used to control the full-bridge inverter. The main noise generation of the full-bridge inverter are analyzed in order to eliminate the noise from the noise source. Based on Fourier series analysis, the switching angles of PWM signal can be gernerated to eliminate the selected harmonics, such us 3rd, 5th, 7th, 9th, 11th, 13th, 15th, 17th and 19th harmonics. The Pspice simulation software is used to evaluate the performance of harmonic elimination, to adjust the operating frequencies, to match the system impendence and to drive the different size of panel. The Programmable System on Chip (PSoC) is adopted as the core control unit, to gernerate SHE-PWM signal for the full-bridge inverter, to detective feedback signal, to send an initial signal of the multi-jump module and to adjust the brightness of the EL light. The Human/Machine interface can design the EL panel light-emitting sequence on the computer.
The simulations and experiments are provided to verify that the proposed approach has low noise and higher flexibility.
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