| Summary: | 碩士 === 南臺科技大學 === 電子工程系 === 104 === In general, the charging of traditional electrical equipment obtains power via a power line. However, the wireless charging system is newly developed by employing the primary and secondary circuits’ coupling induction to transfer electrical power. The wireless charging technology does not require power line connected, and therefore can meet the special charging requirements with properties of waterproof, dustproof, and portable for many new electronic products. Due to these nice properties, the wireless charging technique has been widely used in many applications. In this thesis, we will design and implement a wireless charger by the method of using electromagnetic induc-tion between two coils to transfer power energy. This electromagnetic induction wireless charger is a near-field power transmission system that employs non-radiation wireless charging technology. Here, we study the basics of electrical power transferring through electromagnetic induction and its power transfer efficiency factor. We also propose a mechanism to improve the power transfer efficiency by adjusting the relative location of primary and secondary coils. Based on the research results, we carry out an automatic position-adjustable wireless charging system that can work in the best energy transmission condition by adjusting the primary coil module position automatically. The functional testing has been worked out on the implemented prototype system. The test results demonstrate that the wireless charging system can operate at an optimal power transmission condition by locating the primary coil module according to the position of electronic equipment. Therefore, the proposed wireless charging system can improve the energy transfer efficiency and is more user-friendly, then results in being used in many innovative applications.
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