CN109038862B

CN109038862B - Mobile power receiver and traveling wave type non-contact power supply system using the same

Info

Publication number: CN109038862B
Application number: CN201810766193.XA
Authority: CN
Inventors: 彭亮; 朱威
Original assignee: Hangzhou Dianzi University
Current assignee: Hangzhou Dianzi University
Priority date: 2018-07-12
Filing date: 2018-07-12
Publication date: 2020-05-12
Anticipated expiration: 2038-07-12
Also published as: CN109038862A

Abstract

The invention discloses a moving power receiver and a traveling wave type non-contact power supply system applying the power receiver. The catenary to transmit electricity to moving objects takes up a lot of space and is prone to various failures in bad weather. The mobile power receiver of the present invention includes n receiving traveling wave coupling sections. The receiving traveling wave coupling section includes two powered open waveguides. Both input ends of the two powered open waveguides are left floating. The traveling wave type non-contact power supply system using the mobile power receiver includes a power supply module and a power receiving module. The power supply module includes an AC power supply and a transmitting traveling wave coupling section. The transmitting traveling wave coupling section includes a powered open waveguide. The powered module includes a mobile powered body and a power management component. The power management assembly includes n rectifier circuit groups. The n rectifier circuit groups correspond to the n receiving traveling wave coupling sections in the mobile power receiver respectively. The present invention can ensure continuous and high-efficiency electric energy coupling during the long-distance and high-speed movement of the mobile power receiver.

Description

Mobile power receiver and traveling wave type non-contact power supply system using same

Technical Field

The invention belongs to the technical field of wireless power transmission, and particularly relates to a mobile power receiver and a traveling wave type non-contact power supply system using the same.

Background

The wireless power transmission technology is a hot spot of the current power electronic technology development. The technology can be widely applied to the fields of household appliances, industrial robots, medical instruments, aerospace, oil field mines, underwater operation and the like, and has great potential of technical innovation. In 2007, Marin, university of Siamese, Ma

The teaching team lights bulbs more than two meters apart by using the magnetic resonance principle, so that the potential possibility of wireless power transmission is deeply realized by human beings.

In various power supply systems, power supply to mobile terminals, particularly large power moving bodies (such as high-speed trains) is relatively difficult. Generally speaking, for the transmission electric power of high-power moving body, generally adopt the contact net to realize, its drawback lies in not only that the cost is expensive, it is difficult to maintain, moreover occupy a large amount of space regions, meet bad weather still all kinds of failures of easy appearance. The power supply of the moving body in a non-contact mode is a potential excellent scheme for solving various problems. In this respect, the existing thinking is to continuously arrange a plurality of magnetic resonance coils below a roadbed of a road or at two sides of the road where a moving body travels, and to transmit electric energy to the moving body in a high-frequency manner by means of magnetic coupling, which needs a large number of high-quality coils and high-frequency signal sources, and has the disadvantages of extremely high manufacturing cost, extremely high installation and debugging difficulty, and incapability of ensuring the robustness of energy efficient coupling.

Disclosure of Invention

The invention aims to provide a long-distance travelling wave type non-contact power supply system and a mobile power receiver.

The invention relates to a mobile power receiver, which comprises n receiving traveling wave coupling sections. The receiving traveling wave coupling section includes two electrically-open waveguides. One end of the two power receiving open type waveguides is open circuit, and the other end of the two power receiving open type waveguides is output end.

The spatial position relation of the two power receiving open type waveguides satisfies one of the following two schemes:

(1) the physical length of the power receiving open waveguide is equal to 0.25. lambda₂。λ₂Is the wavelength of the electromagnetic wave transmitted by the electrically open waveguide. The open ends of the two electrically powered open waveguides face different sides.

Spacing between open ends of two powered open waveguides

Wherein b is an odd number.

(2) The physical length of the power receiving open waveguide is equal to 0.25. lambda₂. The open ends of the two electrically-powered open waveguides face the same side. The distance L between the open end of one power receiving open type waveguide and the output end of the other power receiving open type waveguide₃Less than or according to 0.01. lambda.₂According to the following expression:

where c is an even number not equal to zero.

The travelling wave type non-contact power supply system applying the mobile power receiver comprises a power supply module and a power receiving module. The power supply module comprises an alternating current power supply and a transmitting traveling wave coupling section. The transmitting travelling wave coupling section comprises a power supply open type waveguide. And the input terminal of the power supply open type waveguide is connected with the output interface of the alternating current power supply.

The power receiving module comprises a mobile power receiver and a power management component. The power management assembly includes n groups of rectifying circuits. The n rectifying circuit groups correspond to the n receiving traveling wave coupling sections in the mobile power receiver respectively. The rectifying circuit group includes two rectifying circuits.

And the output interface of one of the electrically-powered open waveguides in the traveling wave receiving coupling section is connected with the input interface of one of the rectifying circuits in the corresponding rectifying circuit group. The output end of the other power receiving open type waveguide in the traveling wave receiving coupling section is connected with the input end in the other rectifying circuit in the corresponding rectifying circuit group.

Further, the power supply module further comprises a matching circuit network. The matching circuit network is arranged between the alternating current power supply and the power supply open type waveguide. The input interface of the matching circuit network is connected with the output interface of the alternating current power supply, and the output interfaces are respectively connected with the power supply open type waveguide.

Further, the transmitting traveling wave coupling section further comprises a terminal load. The terminal of the end load is shown connected to the output terminal of the powered open waveguide. The terminal load adopts an inductor, a capacitor or an inductor-capacitor composite network.

Furthermore, the matching circuit network is a high-power capacity matching network with an inductance and a capacitance as main bodies.

Further, the spatial position of the power supply open type waveguide is realized according to the following two schemes:

(1) and attaching the power supply open type waveguide to the roadbed.

(2) The power supply open type waveguide is erected on the air.

Furthermore, the power supply open type waveguide adopts a parallel double-wire transmission line. Physical length L of parallel two-wire transmission line₁The expression of (a) is as follows:

wherein a is odd number, λ₁The wavelength of the electromagnetic wave transmitted by the parallel two-wire transmission line.

Line spacing of parallel two-line transmission lines

Further, the output interfaces of all the rectifying circuits in the power management component are connected in series or in parallel. The rectification circuit adopts an AC-DC rectification module.

Further, the moving current receiver moves or is static on the coupling section of the transmitting traveling wave.

The invention has the beneficial effects that:

1. the invention can ensure continuous and efficient electric energy coupling at any point in the process of carrying out long-distance high-speed movement on the moving current-receiving body along the coupling section of the transmitting traveling wave.

2. The movement of the moving power receiver using the plurality of receiving traveling-wave coupling sections does not affect the power-supply-end impedance matching. No complex adaptive matching circuits are required.

3. The power transfer efficiency of the present invention reaches 85% or more.

4. The invention can be applied to all remote power supply occasions along a specific track, and can also be applied to the aspects of intelligent hardware fixed-point wireless charging technology and the like.

Drawings

FIG. 1 is a block diagram of the overall architecture of the present invention;

FIG. 2 is a schematic diagram of a power supply module of the present invention;

FIG. 3 is a schematic diagram of a power receiving module according to the present invention;

FIG. 4 is a first spatial relationship of two electrically powered open waveguides according to the present invention;

fig. 5 is a second spatial position diagram of two electrically-powered open waveguides in accordance with the present invention.

Detailed Description

The invention is further described below with reference to the accompanying drawings. The invention is not limited to this embodiment.

As shown in fig. 1 and 2, a traveling wave type non-contact power supply system includes a power supply module 1 and a power receiving module 2. The power supply module 1 comprises an alternating current power supply 1-1, a matching circuit network 1-2 and a transmitting traveling wave coupling section 1-3. The output interface of the alternating current power supply 1-1 is connected with the input interface of the matching circuit network 1-2. The matching circuit network 1-2 is a capacity matching network mainly composed of an inductor and a capacitor. The transmitting traveling wave coupling section 1-3 comprises a power supply open type waveguide 1-3-1 and a terminal load 1-3-2. The input terminal of the power supply open waveguide 1-3-1 is connected to the output terminal of the matching circuit network 1-2. The terminal of the end load 1-3-2 is connected to the output terminal of the feeding open waveguide 1-3-1. The terminal load 1-3-2 adopts a non-resistive inductor, capacitor and inductor-capacitor composite network to avoid real power consumption. The end loads 1-3-2 can also be implemented directly as open or short circuits.

The spatial position of the power supply open type waveguide 1-3-1 is realized according to the following two schemes:

(1) the power supply open type waveguide 1-3-1 is attached to a roadbed, so that the mobile power receiver 2-1 can pass above the power supply open type waveguide 1-3-1, and therefore, the power can be received. At this time, the wavelength of the electromagnetic wave transmitted to the open waveguide 1-3-1 is measured by a standing wave method.

(2) The power supply open type waveguide 1-3-1 is erected in the air so that the moving power receiver 2-1 can pass under the power supply open type waveguide 1-3-1, thereby receiving power.

The power supply open type waveguide 1-3-1 adopts a parallel double-line transmission line. Physical length L of parallel two-wire transmission line₁The expression of (a) is as follows:

wherein a is odd number, λ₁Wavelength (lambda) of electromagnetic waves transmitted by a parallel two-wire transmission line₁Determined by the output frequency of the ac power supply 1-1, the external environmental conditions).

Line spacing of parallel two-line transmission lines

To effectively suppress electromagnetic radiation.

In actual work, when the matching circuit network 1-2 detects a power transmission request, the alternating current power supply 1-1 is controlled to be started, and when power transmission is not received, the alternating current power supply 1-1 is controlled to be stopped. Thereby achieving the purpose of saving electricity. A high-power high-frequency power signal generated by an alternating current power supply 1-1 is input into a matching circuit network 1-2, and is fed into a transmitting traveling wave coupling section 1-3 after being tuned by a high-power capacity capacitor and an inductor. In addition, since the thickness and the line pitch of the parallel twin transmission line for concrete laying affect the transmission line characteristic impedance, it is necessary to adjust the impedance matching circuit to ensure that the power is fed to the moving power receiver 2-1 as much as possible.

As shown in fig. 1 and 3, the power receiving module 2 includes a mobile power receiver 2-1 and a power management component 2-2. The moving power receiver 2-1 comprises n receiving traveling wave coupling sections, wherein n is 1. The receiving traveling wave coupling section comprises two electrically-powered open waveguides 2-1-1. One end of the two power receiving open type waveguides 2-1-1 is open-circuited, and the other end is an output end. The power management assembly 2-2 includes n groups of rectifying circuits. The n rectifying circuit groups correspond to the n receiving traveling wave coupling sections in the mobile power receiver 2-1 respectively. The rectifying circuit group includes two rectifying circuits.

The output end of one of the power-receiving open type waveguides 2-1-1 in the receiving traveling wave coupling section is connected with the input end of one of the rectifying circuits in the corresponding rectifying circuit group. The output end of the other electrified open type waveguide 2-1-1 in the traveling wave receiving coupling section is connected with the input end of the other rectifying circuit in the corresponding rectifying circuit group.

Output interfaces of all rectification circuits in the power management assembly 2-2 are connected in series or in parallel and then connected with the energy storage device 3, or connected with the energy storage device 3 and the energy consumption device 4 simultaneously. The rectification circuit adopts an AC-DC rectification module. Thereby enabling the power management component 2-2 to combine the power output by the n mobile receivers 2-1.

The spatial position relationship of the two electrically-powered open waveguides 2-1-1 satisfies one of the following two schemes:

(1) as shown in FIG. 4, the physical length of the electrically-receiving open waveguide 2-1-1 is equal to 0.25. lambda. lambda.₂。λ₂For receiving the wavelength (generally lambda) of the electromagnetic wave transmitted by the open waveguide 2-1-1₂And λ₁With little difference). The open ends of the two electrically powered open waveguides 2-1-1 face different sides.

Spacing between open ends of two powered open waveguides 2-1-1

Wherein b is an odd number. Moreover, the two power receiving open type waveguides 2-1-1 are not contacted with each other, and when the distance between the two power receiving open type waveguides 2-1-1 is too small, the two power receiving open type waveguides 2-1-1 are prevented from being contacted in a spatially staggered mode.

(2) As shown in FIG. 5, the physical length of the electrically-receiving open waveguide 2-1-1 is equal to 0.25. lambda. lambda.₂. The open ends of the two electrically powered open waveguides 2-1-1 face the same side. The distance L between the open end of one power receiving open type waveguide 2-1-1 and the output end of the other power receiving open type waveguide 2-1-1₃Less than 0.01. lambda₂Or according to the following expression:

where c is an even number not equal to zero.

When the moving power receiver 2-1 moves along the transmitting traveling wave coupling section 1-3, strong electromagnetic wave coupling is generated between the moving power receiver and the transmitting traveling wave coupling section 1-3, a high-efficiency alternating current power link is constructed, and therefore electric energy is received and transmitted to the energy storage device 3 and the energy consumption device 4. The energy consumption device 4 converts the collected electric power into other forms of power output.

While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The mobile power receiver is characterized in that: it includes n receiving traveling wave coupling sections; the receiving traveling wave coupling section includes two power receiving open waveguides; one end of the power receiving open waveguides is open, and the other end is an output end; The physical length of the open waveguide is equal to 0.25·λ ₂ , and λ ₂ is the wavelength of the electromagnetic wave transmitted by the open waveguide;

The spatial position relationship of the two powered open waveguides satisfies one of the following two schemes:

(1) The open ends of the two power-receiving open waveguides face different sides; the distance between the open ends of the two power-receiving open waveguides

where b is an odd number;

(2) The open ends of the two power receiving open waveguides face the same side; the distance L ₃ between the open end of one power receiving open waveguide and the output end of the other power receiving open waveguide is less than 0.01·λ ₂ or according to the following expression:

where c is an even number not equal to zero.

2. The traveling wave type non-contact power supply system applying the mobile power receiver as claimed in claim 1, comprising a power supply module and a power receiving module; it is characterized in that: the power supply module comprises an alternating current power supply and a transmitting traveling wave coupling section; The transmitting traveling wave coupling section includes a power supply open waveguide; the input interface of the power supply open waveguide is connected with the output interface of the AC power supply;

The power receiving module includes a mobile power receiver and a power management component; the power management component includes n rectifier circuit groups; the n rectifier circuit groups correspond to the n receiving traveling wave coupling sections in the mobile power receiver respectively; the rectifier circuit group Including two rectifier circuits;

The output end of one of the power-receiving open waveguides in the receiving traveling wave coupling section is connected to the input end of one of the rectifier circuits in the corresponding rectifier circuit group; the output end of the other power-receiving open waveguide in the receiving traveling wave coupling section It is connected to the input end of another rectifier circuit in the corresponding rectifier circuit group.

3. The traveling wave type non-contact power supply system according to claim 2, wherein: the power supply module further comprises a matching circuit network; the matching circuit network is arranged between the AC power supply and the power supply open waveguide; The input interface of the matching circuit network is connected with the output interface of the AC power supply, and the output terminal is connected with the power supply open waveguide.

4. The traveling wave type non-contact power supply system according to claim 2, characterized in that: the transmitting traveling wave coupling section further comprises a terminal load; the terminals of the terminal load and the output terminals of the open waveguide for power supply Connected; the terminal load adopts an inductor, a capacitor or an inductor-capacitor composite network, or it can be directly realized by an open circuit or a short circuit.

5 . The traveling wave type contactless power supply system according to claim 3 , wherein the matching circuit network is a high-power capacity matching network with inductors and capacitors as the main body. 6 .

6. The traveling wave type contactless power supply system according to claim 2, wherein the spatial position of the open waveguide for power supply is realized according to the following two schemes:

(1) Attach the power supply open waveguide to the roadbed;

(2) The power supply open waveguide is erected in the air.

7. The traveling wave type contactless power supply system according to claim 2, wherein the open waveguide for power supply adopts a parallel bi-wire transmission line; the expression of the physical length L _of the parallel bi-wire transmission line is as follows:

Among them, a is an odd number, and λ ₁ is the wavelength of the electromagnetic wave transmitted by the parallel two-wire transmission line;

Line spacing of parallel two-wire transmission lines

8 . The traveling wave type contactless power supply system according to claim 2 , wherein the output interfaces of all rectifier circuits in the power management component are connected in series or in parallel; the rectifier circuit adopts an AC-DC rectifier module. 9 .

9 . The traveling wave type non-contact power supply system according to claim 2 , wherein the mobile power receiver moves or is stationary on the transmitting traveling wave coupling section. 10 .