A method for regulating the output voltage of a rectifier for wireless power transmission

A technology for wireless power transmission and output voltage, which is applied in the direction of converting AC power input to DC power output, output power conversion devices, high-efficiency power electronic conversion, etc. Efficiency and other issues, to achieve high practicability, reduce rectifier losses, and reduce the number of devices

Active Publication Date: 2020-05-19
甘肃南洋新能源科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of low transmission efficiency caused by diode rectification loss at the wireless receiving end, and at the same time, the output voltage of diode rectification cannot be adjusted, which requires additional components, which reduces system efficiency and increases production costs. A method for regulating the output voltage of a rectifier for wireless power transfer

Method used

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  • A method for regulating the output voltage of a rectifier for wireless power transmission
  • A method for regulating the output voltage of a rectifier for wireless power transmission

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Embodiment 1

[0028] A method for adjusting the output voltage of a rectifier for wireless power transmission provided by a preferred embodiment of the present invention includes the following steps:

[0029] Step 1: Obtain the voltage V at the middle point of resistors R1 and R2 det1 , Resistor R3 and R4 intermediate point voltage V det2 , the voltage at the middle point of resistors R5 and R6, where V det1 , V det2 are the input voltage sampling values ​​of the two input terminals of the rectifier at the wireless power receiving end, and the voltage at the middle point of the resistors R5 and R6 is the sampling value of the output voltage of the rectifier.

[0030] Such as figure 1 As shown, the front end of the rectifier is connected with a receiving coil L1 and a receiving compensation capacitor C1 connected in series, and the rear end is connected with a load. The rectifier includes a bridge rectifier circuit composed of MOS tube 1, MOS tube 2, MOS tube 3, MOS tube 4 and correspond...

Embodiment 2

[0042] On the basis of Embodiment 1, the back end of the bridge rectifier circuit is also connected with a filtering and voltage stabilizing circuit for stabilizing and filtering the output voltage. The connected inductor L2 and the capacitors C2 and C3 connected in parallel with the load can stabilize and filter the output voltage through the inductor L2, capacitors C2 and C3. The circuit is simple, the design is reasonable, and the practicability is high.

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Abstract

The invention discloses a method for regulating a rectifier output voltage for wireless electric energy transmission, related to the technical field of wireless electric energy transmission. The method for regulating the rectifier output voltage for the wireless electric energy transmission comprises the following steps: 1, resistors R1 and R2, R3 and R4 separately collect the input voltage of therectifier, the voltages collected by the resistors R1 and R2 are recorded as V<det1>, the voltages collected by the resistors R3 and R4 are recorded as V<det2>, and resistors R5 and R6 collect the output voltage of the rectifier; wherein the rectifier comprises a MOS transistor 1, a MOS transistor 2, a MOS transistor 3, a MOS transistor 4, the resistors R1 to R6, a PI controller, a PWM, and voltage comparators COMP1 and COMP2; and 2, the PI controller adjusts a voltage threshold V<ref> according to the output voltages collected by the resistors R5 and R6, and compares the sizes of the collected voltages V<det1>, V<det2> and the current voltage threshold V<ref>; if V<det1> is greater than V<ref>, the voltage comparator COMP1 outputs a high level to turn on the MOS transistor 1 and the MOStransistor 4; and if V<det2> is greater than V<ref>, the voltage comparator COMP2 outputs a high level to turn on the MOS transistor 2 and the MOS transistor 3. According to the invention, through thecombination of synchronous rectification and phase shifting, the rectification loss is reduced and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of wireless power transmission, in particular to a method for adjusting the output voltage of a rectifier for wireless power transmission. Background technique [0002] Wireless power transmission, also known as wireless power transmission, non-contact power transmission, refers to the conversion of electrical energy into other forms of relay energy through the transmitter, and after a distance is transmitted through the air, the relay energy is converted into electrical energy through the receiver to achieve Wireless power transmission. The wireless power transmission system includes a wireless transmitter and a wireless receiver that transmit energy through a magnetic field. The rectifier (rectifier) ​​at the wireless receiver is a device that converts alternating current into direct current. It can be used for power supply and detection of radio signals. The rectifier can be made of vacuum tubes , igniti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/219H02M1/14
CPCY02B70/10
Inventor 张华张永恒
Owner 甘肃南洋新能源科技发展有限公司
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