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Frequency tracking device, method and system of wireless-charging transmitting end

A technology of frequency tracking and wireless charging, which is applied in the direction of circuit devices, electromagnetic wave systems, battery circuit devices, etc., can solve the problems of low wireless charging efficiency, and achieve the effects of easy promotion and popularization, good frequency matching, and improved efficiency

Inactive Publication Date: 2014-12-17
陈业军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a frequency tracking device, method and system for a wireless charging transmitting end to solve the problem of low wireless charging efficiency when using the existing wireless charging technology for charging

Method used

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  • Frequency tracking device, method and system of wireless-charging transmitting end
  • Frequency tracking device, method and system of wireless-charging transmitting end
  • Frequency tracking device, method and system of wireless-charging transmitting end

Examples

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Embodiment 1

[0022] Embodiment 1, the frequency tracking device of the wireless charging transmitting end of this embodiment, see figure 1 As shown, it includes: a frequency tracking part circuit 11 , a high frequency inverter part circuit 12 and an LC resonant antenna 13 connected in sequence. The frequency tracking part circuit 11 is used to capture the phase difference between voltage and current, and output it to the high-frequency inverter part circuit 12; the high-frequency inverter part circuit 12 is used to make the output signal produce a frequency offset according to the phase difference; LC The resonant antenna 13 is used for transmitting radio frequency signals outward according to the shifted signal frequency.

[0023] In order to further illustrate the circuit structure of the frequency tracking part circuit 11, the high frequency inverter part circuit 12 and the LC resonant antenna 13, the present embodiment provides but not limited to the following figure 2 The circuit st...

Embodiment 2

[0027] Embodiment 2, the wireless charging transmission system of this embodiment, see image 3 As shown, it includes: an interconnected charging and transmitting device 21 and a charging and transmitting antenna 22 , and a frequency tracking device 23 that resonates with the charging and transmitting antenna 22 . The frequency tracking device 23 can adopt the frequency tracking device of the wireless charging transmitting end shown in Embodiment 1. In the actual product, the frequency tracking device 23 can be located inside the charging transmitting device 21 for tracking the frequency of the wireless radio frequency signal sent by the charging transmitting antenna 22. . The charging and transmitting device 21 transmits wireless radio frequency signals through the charging and transmitting antenna 22 .

[0028] In the actual installation process, the charging and transmitting device 21 of the transmitting system is installed at the front end of the parking space. The ground...

Embodiment 3

[0029] Embodiment 3. The frequency tracking method of the wireless charging transmitting end of this embodiment can be implemented by using the frequency tracking device of the wireless charging transmitting end shown in the above-mentioned embodiment 1, see Figure 5 shown, including the following main steps:

[0030] S31. Capturing the phase difference between voltage and current.

[0031] S32. Adjust the frequency of the output signal according to the phase difference.

[0032] S33. Transmit a wireless radio frequency signal outward according to the adjusted signal frequency.

[0033] In a specific implementation, the high-frequency inverter part mainly includes a high-frequency inverter and a PWM driver. The high-frequency inverter adopts a resonant inverter, and uses a resonant inductor instead of a transformer to transmit energy, which reduces the loss of the transformer and can increase the distance of wireless transmission. The PWM driver is mainly used to amplify t...

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Abstract

The invention provides a frequency tracking device, method and system of a wireless-charging transmitting end, relates to the field of wireless charging and aims at solving the problem of low wireless charging efficiency when existing wireless charging technology is adopted for charging. The frequency tracking device comprises a frequency tracking portion circuit, a high-frequency inverting portion circuit and an LC resonance antenna which are connected sequentially, the frequency tracking portion circuit is used for capturing phase difference of voltage and current and outputting the phase difference to the high-frequency inverting portion circuit, the high-frequency inverting portion circuit is used for enabling output signals to generate frequency deviation according to the phase difference, and the LC resonance antenna is used for outwards transmitting wireless radio frequency signals according to signal frequency after deviation. The frequency tracking system comprises a charging transmitting device, a charging transmitting antenna and the frequency tracking device, and the charging transmitting device and the charging transmitting antenna are connected with each other. The frequency tracking method includes capturing the phase difference of voltage and current; adjusting frequency of the output signals according to the phase difference; outwards transmitting the wireless radio frequency signals according to the signal frequency after adjusting.

Description

【Technical field】 [0001] The invention relates to the field of wireless charging, in particular to a frequency tracking device, method and system for a wireless charging transmitter. 【Background technique】 [0002] Wireless power supply technology (Contactless Power Supply, CPS), also known as inductive coupled power transmission technology (Inductive Coupled Power Transmission, ICPT), contactless power supply means that the transmission line and the load side have no electrical connection and physical contact, even between them In the case of relative motion, complete the transmission of electric energy. The theoretical basis of the contactless power supply technology is the principle of electromagnetic induction, using modern electric energy conversion technology, magnetic field coupling technology, with the help of modern control theory and microelectronic control technology, to realize the transmission of energy from stationary equipment to movable equipment. [0003] W...

Claims

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Application Information

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IPC IPC(8): H02J17/00H02J7/02H02J50/12
Inventor 陈业军
Owner 陈业军
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