Unlock instant, AI-driven research and patent intelligence for your innovation.

A capacitively coupled wireless power transmission circuit and its control method

A wireless power transmission and capacitive coupling technology, applied in battery circuit devices, circuit devices, current collectors, etc., can solve problems such as decreased transmission efficiency, increase coupling capacitance and electric field strength, reduce volume and cost, and improve transmission power Effect

Active Publication Date: 2017-12-08
HUNAN UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the distance increases, the transmission efficiency drops sharply

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A capacitively coupled wireless power transmission circuit and its control method
  • A capacitively coupled wireless power transmission circuit and its control method
  • A capacitively coupled wireless power transmission circuit and its control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The structural diagram of the capacitively coupled wireless charging circuit of the present invention is as follows figure 2 As shown, the structure is mainly composed of two parts: a pre-stage rectifier and a capacitively coupled wireless transmission circuit (or CCPT circuit). The CCPT circuit is composed of a front-stage H-bridge inverter transmitter and a rear-stage H-bridge inverter receiver. The transmitter and receiver circuits are capacitively coupled, and the power is transmitted from the transmitting end to the receiving end through electric field coupling. The CCPT circuit includes two H-bridge converters H1 and H2, two LC type resonant compensation circuits, L p , L s 、C t 、C s They are resonant inductance and capacitance respectively; two pairs of plates A1, A2, B1 and B2 can be regarded as a capacitor respectively, and its equivalent capacitance value is C 1 and C 2 . The rectifier provides a constant DC voltage for the CCPT circuit through PWM cont...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a capacitive coupling wireless power transmission circuit and a control method thereof. The capacitive coupling wireless power transmission circuit comprises an H bridge inversion transmitter and an H bridge inversion receiver. Direct current voltage is inverted by an H bridge convertor H1 to output high-frequency alternating current; then, after LpCt filtering is carried out, through an electric field coupling principle of two pairs of polar plates, power is transferred to a receiving end from a sending end, and corresponding alternating current voltage is generated on two ends of a capacitor Cs by induction; and output power is controlled by an H bridge convertor H2 to charge direct current side load. The capacitive coupling transfer way can effectively omit heavy emission coils and coupling coils, lowers the volume and the cost of a device and has a good application prospect.

Description

technical field [0001] The invention relates to the field of wireless power transmission, in particular to a capacitively coupled wireless power transmission circuit and a control method thereof. Background technique [0002] Since the second industrial revolution, human society has entered the era of electrification. As large as power grids and high-voltage lines all over the world, as small as various household electrical equipment, the transmission of electric energy is mainly through point-to-point direct contact transmission of metal wires. This "wired" transmission method has brought many problems. Due to problems such as friction and aging, sparks are easily generated during power transmission, which in turn affects the life of electric equipment and the safety of electricity use. These problems are calling for a power transmission method without metal wires, that is, wireless power transmission. The realization of wireless power transmission will make the human ap...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H02J50/05H02J7/02
CPCH02J7/025
Inventor 马伏军罗安何志兴毕然徐千鸣
Owner HUNAN UNIV