Magnetic field coupling-type non-contact electric energy transmission device

Abstract

The invention discloses a magnetic field coupling-type non-contact electric energy transmission device, which comprises an electric energy transmitting part and an electric energy receiving part which are independent mutually, wherein a primary full-bridge switch circuit, a sweep frequency generation circuit, a primary switching tube current zero-crossing detection circuit, a primary ramp signal generation circuit, an input current limiting control circuit and a primary PWM (Pulse-Width Modulation) driving control circuit which are in the electric energy transmitting part are integrated in a primary high-power density integrated chip; and a secondary synchronous rectification full-bridge switch circuit, a synchronous rectification control circuit, a secondary switching tube current zero-crossing detection circuit, a secondary ramp signal generation circuit, a constant current / constant voltage control circuit and a secondary PWM driving control circuit which are in the electric energy receiving part are integrated in a secondary high-power density integrated chip. The device captures a resonant frequency point of a system through an automatic scanning process during initial work and ensures that the system always works in a resonance state, and the electric energy transmission efficiency is increased. The magnetic field coupling-type non-contact electric energy transmission device provided by the invention has a single-chip packaging structure and meets the requirements for high efficiency and high stability on the basis of realizing low cost.

Description

technical field [0001] The invention relates to the field of power electronics, and more specifically, relates to a magnetic field coupling non-contact power transmission device. Background technique [0002] The magnetic field coupling non-contact power transmission system is mainly suitable for working in various harsh environments such as mines and underwater operations to achieve safe electrical shielding isolation and avoid losses caused by various accidents such as leakage, short circuit and fire. In addition, its novel and convenient energy transmission mode also fully caters to the increasing requirements of the current civilian consumer electronics market in terms of innovation and individuality. However, due to the poor coupling effect of the primary and secondary magnetic fields of the magnetic field-coupled non-contact energy transmission system, the system work is very sensitive to the placement of the primary side energy emission and secondary side energy recep...

AI Technical Summary

Problems solved by technology

However, in frequency conversion control, the relationship between the phase angle and frequency between the input voltage and input current of the power supply is likely to diverge, causing system instability.

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