The Research On The Non-contact Power Supply System Based On Mutual Inductance Coupling

This article is based on the non-contact energy transfer principle, launched anin-depth, and detailed study on the non-contact power transmission technology.Through a large number of experiments, developed a set of “non-contact chargingsystem which is based on mutual inductance coupling” and displayed the system inthis article. The physical system is given to show the research in the technical field.On the development process of “non-contact charging system which is based onmutual inductance coupling”, with realistic attitude and innovative spirit, did a lot ofwork which have innovations and features. Mainly in the following areas:First, from the application’s point of view, on the basis of minimizing the sizeand weight of the non-contact energy coupled transmission system and enhancing thesystem’s utility, finally designed and completed the system. Compared to otherresearch results in the non-contact energy transfer technology, this system reduces thesystem’s size, weight and cost at a greater extent. On the basis of ensuring the energytransfer efficiency greatly enhanced the practicality of the system.Second, the “non-contact charging system which is based on mutual inductancecoupling” use mutual inductance coupling (hollow solenoid combination) as the coredevice of the energy coupled transmission. This paper studies the hollow solenoidcombination of mutual inductance coupling which has different specifications andstructure and its non-contact energy transfer efficiency at different air gap variationand the impact on the system’s efficiency that the hollow solenoid’s primary andsecondary side use compensation capacitor. According to the experimentalmeasurement on the non-contact energy transfer efficiency of many homemademutual inductance couplings and the systematic analysis, elect one kind of mutualinductance coupling which has high transmission efficiency (Hollow solenoid combination of primary4-1, secondary4-2). This non-contact energy transfer systemuse mutual inductance coupling as the energy coupled transmission core component.Across using the compensation capacitor，make the system work in the resonant state.Measured at the20mm air gap, we get the system’s input power is approximately16.32W and the system’s output power is approximately2.82W.Currently, the actual output power can meet the needs of small power equipmentand achieve non-contact charging for a number of small electrical equipment.Third, for the same homemade mutual inductance coupler, at the conditions ofmaintaining the air gap and the input power signal’s (hereinafter referred to as signals)frequency, we study the impact on the non-contact transmission efficiency of thesignal energy when the input signal waveform and the average power changes. Weselected the square wave, sine wave and triangular wave as the input signals. First ofall, at the point of horizontal analysis we can conclude that the same waveform of theinput signal, the same energy transmission efficiency. And at the point of longitudinalanalysis, we can conclude that the different waveform of input signal power, thedifferent transmission efficiency. And the transfer efficiency ratio of square wave, sinewave and triangular is:square wave/sine wave/triangular wave=2.622：1.768：1.Until now, in the research carried out for non-contact energy transfer technology,there are no researchers give their study to the public on this point.Finally, we use four LEDs of BW7620B in multifunction light explosion-proofflashlights as the loads that are charged. By lighting these LEDs, displayed the“non-contact charging system which is based on mutual inductance coupling” whichis developed in this article and improved the research which is based on non-contactpower supply technique.