Low-harmonic-degree and high-efficiency high-frequency half-wave rectifier system

Abstract

The invention discloses a low-harmonic-degree and high-efficiency high-frequency half-wave rectifier system. The main structure comprises a current output device of which the two ends are respectivelyprovided with an output end and a first return, a rectifier module, a tuning unit, a first node which is arranged at the side of the first return end back to the current output device, a voltage stabilizing module, at least one load element, a grounding part and at least one return path which is arranged between the first node and the first return end. The current flowing out of the voltage stabilizing module is guided to the current output device. With application of the structure, the tuning unit controls the working cycle of the rectifier module to approach 74 nanoseconds by using simple circuit configuration and appropriate capacitance value setting so that the rectifier module can adjust the output power and improve the AC / DC conversion efficiency under the condition of low electromagnetic interference.

Description

technical field [0001] The present invention provides a low-harmonicity high-efficiency high-frequency half-wave rectification system, especially a low-harmonicity high-efficiency low-harmonicity high-efficiency system with simple structure, less consumption of electronic components, less heat generation, adjustable output power and reduced electromagnetic interference. high-frequency half-wave rectification system. Background technique [0002] Nowadays, there is a significant demand for charging various low-power electronic devices, especially wearable devices. This demand has led to the increasing popularity of wireless power transfer (WPT) using inductive resonant coupling in recent years. WPT work has made significant progress in system design and application at kilohertz power levels, and at the same time, for low power applications, further increases in voltage frequencies such as several megahertz bring greater spatial freedom, i.e. longer transmission distances and ...

AI Technical Summary

Problems solved by technology

However, in this circuit configuration, there are two diodes on the path of the positive half cycle and the negative half cycle, so heat will be generated when the current passes through these four diodes. If EMI affects other nearby components, the problem of heat generation will be even worse. Significantly, and the signal reception efficiency of this mode is not ideal

[0004] However, the circuit configuration of the above-mentioned AC rectification circuit does have the following problems and deficiencies that need to be improved:

[0005] 1. More diodes must be used, which tends to generate more heat

[0006] 2. There are many components used, so that the overall volume cannot be reduced

[0007] 3. The efficiency of AC conversion to DC is not good

[0008] 4. It is easy to be affected by EMI problems, resulting in more serious heating problems

[0009] 5. When applied to low-power devices, the interference problem is more obvious, and it is even difficult to combine with miniaturized equipment due to volume problems

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