Inductive coupling type electric energy transmission device

Abstract

The invention discloses an inductive coupling type electric energy transmission device, which is formed by connecting an inverter in series with a separable transformer or weak coupling transformer. One ends of the primary side and secondary side of the separable transformer or weak coupling transformer are respectively connected in series with a resonance capacitor to enable the primary side and the secondary side of the separable transformer or weak coupling transformer to be subjected to the resonance, wherein Lk1 and Lk2 respectively express leakage inductance quantities of the primary side and the secondary side of the separable transformer or weak coupling transformer, and Cr2 and Cr2 respectively express capacitor values of resonance capacitors of the primary side and the secondary side of the separable transformer or weak coupling transformer. By adding the resonance capacitors, the invention ensures that the leakage inductances of the primary side and the secondary side and the series impedances of the resonance capacitors are zero when carrying out the frequency resonance, therefore, non-contact electric energy transmission efficiency is high. The invention also has the advantages of simple structure, convenient realization and easy popularization.

Description

technical field [0001] The invention relates to an inductively coupled power transmission device, which belongs to the technical field of wireless power transmission devices. Background technique [0002] Existing power transmission includes direct contact of wires for power transmission and non-contact power transmission. [0003] Since Faraday revealed the phenomenon of electromagnetic induction in 1831, the transmission of electric energy is mainly carried out by direct contact of wires, and electrical equipment is generally powered by the contact of electrical connectors such as plugs and sockets. Due to friction, wear and bare wires in this transmission mode, it is easy to generate contact sparks, which affects the safety and reliability of power supply and shortens the service life of electrical equipment. In mines, oilfield drilling and other occasions, the traditional wire direct contact power supply method is used, and the tiny electric sparks generated by contact ...

AI Technical Summary

Problems solved by technology

For example, the invention application with the publication number CN1996711A on December 8, 2006 and the invention application with the publication number CN101202570A on October 28, 2007, wherein the primary side magnetic core and the secondary side magnetic core of the separable transformer or weak coupling transformer are separable Yes, this is very different from the transformer in the traditional switching power supply. There is a large air gap between the primary and secondary sides, so there is a large leakage inductance. Due to the existence of a large leakage inductance, the non-contact power transmission efficiency is low, greatly limits the development of this technology

Images