Non-Contact Power System with Load and Gap Detection
| Autor: | Chih-Hung Lo, 羅志宏 |
|---|---|
| Rok vydání: | 2006 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 94 In this thesis, we design a non-contact power system with load and gap detection. The primary uses the resonant way to transfer energy to the load by transformer coupling. In order to stabilize the system output and performance, it has to detect the core gap and load. Unfortunately, it is not easy to realize due to the separation of the non-contact structure. This thesis proposes a new detective mechanism to detect the variations of load and gap in non-contact power system. Based on electromagnetic theory, we design a non-contact power system, which is able to transfer energy to the secondary and to feedback energy and signal transfer from the secondary. Moreover, it also uses core self-coupling effect to transfer the energy and signal to the microcontroller through primary and secondary. In order to decrease the power transfer loss, we design a half-bridge series resonant circuit, operating at higher frequency than resonant frequency to achieve zero-voltage switch. In terms of signal transfer, we design a coil to detect both load and gap signals. Then, signals are fed back to the primary controller to control the whole non-contact power system. Experiment results show that: 1) the signal of load detect core is related to the load output and 2) the signal of gap detect core is related to the gap. It is easy to control the output voltage by adjusting the primary operating frequency under variations of load and gap. This non-contact power system is applicable to electric shaver, cell phone, electric car, and artificial heart applications. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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