Non-contact power supply system using frequency conversion soft switching driving technology and driving method thereof

Abstract

The invention discloses a non-contact power supply system using a frequency conversion soft switch driving technology and a driving method thereof. The non-contact power supply system comprises a primary loop and a secondary loop, and the primary loop transmits energy to the secondary loop. A primary side control device is connected with an input voltage detection device, an input current detection device CTi, a driving circuit and a wireless receiving and sending module. The input voltage detection device and the input current detection device CTi are used for detecting the terminal voltage and the current of a DC power source (i) UDC (/i) respectively. The primary side control device converts control signals into driving voltages for controlling a first switch tube S1, a second switch tube S2, a third switch tube S3 and a fourth switch tube S4. A secondary side feedback control device and a load voltage detection device are connected with a load current detection device CTO and a wireless receiving and sending module, the load voltage detection device and the load current detection device CTO are used for detecting the terminal voltage and current of a load (i) RL (/i). The non-contact power supply system is always in a soft switch working state, and is high in working efficiency.

Description

technical field [0001] The invention belongs to the field of non-contact power supply, and in particular relates to a frequency conversion soft switch technology. Background technique [0002] The non-contact power supply system consists of two independent closed systems, which can be used in dusty, humid and corrosive environments. [0003] In the previous literature, some scholars proposed the scheme of using soft switch in the non-contact system. However, the method used is usually to indirectly judge whether the switching tube is working in the ZVS or ZCS state, and the response speed of these methods is relatively slow. During non-contact energy transfer, the primary inductive coil L P To the secondary inductance coil L S The efficiency of energy transfer is also very important. This efficiency is affected by the operating frequency of the switching tube. Under some conditions, the non-contact energy transfer is low, and the overall efficiency of the circuit cannot...

AI Technical Summary

Problems solved by technology

During non-contact energy transfer, the primary inductive coil L P To the secondary inductance coil L S The efficiency of energy transfer is also very important. This efficiency is affected by the operating frequency of the switch tube. Under some conditions, the non-contact energy transfer is low, and the total efficiency of the circuit cannot be guaranteed to be optimized.

[0004] There have been many patents on contactless power supply at home and abroad, but no relevant patents directly based on efficiency values ​​have been seen. n Published papers and patents on dynamically adjusting the driving frequency of switching tubes

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