CN104104139A - Wireless power transmission based mining electric locomotive charging device and method - Google Patents
Wireless power transmission based mining electric locomotive charging device and method Download PDFInfo
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Abstract
The invention discloses a wireless power transmission based mining electric locomotive charging device and method. A mining electric locomotive uses a direct current motor drive system as a main motor drive system. A storage battery can be used for supplying direct current for the motor. The wireless power transmission based mining electric locomotive charging method is characterized in that the power transmission and the feedback information transmission of the electric locomotive are both carried out in a wireless transmission mode rather than in a wire transmission mode. Both a transmitting terminal and a receiving terminal which supply power for the mining electric locomotive have an analysis and processing function and can provide power for the mining electric locomotive by automatically optimizing configuration. The wireless power transmission based mining electric locomotive charging device comprises a first power adjustment module, a wireless power transmission module, a wireless receiving module, a second power adjustment module, a matching module, a storage battery, a data feedback module, a data analysis module and a configuration optimizing module.
Description
Technical field
The present invention relates to a kind of mining electric locomotive charging device and method based on wireless transmission of electricity.
Background technology
Electric accumulator motorcycle for mining is under coal mine, on entry, and a kind of important means of transportation of long-distance transportation.In its Coal Transport in mine and assistant conveyance thereof, accounting for consequence.Its advantage is that cost is lower, and the ability of transport is larger, operates more conveniently, has the advantages such as standby-redundancy system.
Stringing electrical locomotive under coal mine is more disputable equipment always, and the electric locomotive of stringing formula is obtained electric energy by means of pantograph from circuit.In the time that electric locomotive moves, pantograph is slided along overhead wire, relies on pantograph contact aerial to obtain electric energy, in contact portion, easily produces electric spark in sliding process, and the electric spark directly exposing has been easy to accident potential.
The charging modes of electric accumulator motorcycle for mining is mainly to charge with wired mode, because electric equipment under colliery is mainly flameproof electrical apparatus, so the connecting line under mine between electric equipment is weaker link, the interface of adding the transmission means of this " wired " frequently plugs, installs and easily causes friction, damage, in delivery of electrical energy, be easy to produce spark, and then can have influence on safety index.
Wireless technology of transmission of electricity produces relatively early, but its development is slower.In June, 2007, Massachusetts Institute Technology announces to utilize electromagentic resonance technology successfully by wireless means, has lighted one from the 60W bulb away from the about 2m of power supply.It has opened up a kind of brand-new wireless transmission method, magnetic coupling resonance transmission means, and this transmission means can reach longer transmission range, and efficiency of transmission is also considerable.
Summary of the invention
In order to overcome the plug back and forth of electric accumulator motorcycle for mining charging circuit in the time charging, the safety problem that the not convenient and transmission line that installation brings exists, the present invention proposes a kind of convenient and swift, the device for electric accumulator motorcycle for mining power supply that coefficient of safety is high, this device can be under coal mine in the severe situation of this environment, electric accumulator motorcycle for mining is carried out to wireless power, can be quick at short notice, it is efficiently the distribution that supplies of mining electric locomotive safety, effectively avoid under colliery, because friction, contact sparking and cause accident, for providing electric locomotive more easily to use under coal mine.
For achieving the above object, the solution of the present invention is: a kind of mining electric locomotive charging device and method based on wireless transmission of electricity, comprise the electric energy wireless transmission equipment that is positioned at coal mine lower shoe bottom and the electric energy radio receiver that is positioned at coal mine lower shoe top, wherein said electric energy wireless transmission equipment is connected by wireless mode with electric energy radio receiver, described electric energy wireless transmission equipment comprises the first electric energy adjustment module (1), wireless transmission of electricity module (2), data analysis module (8) and distribute module (9) rationally, described electric energy radio receiver comprises wireless receiving module (3), the second electric energy adjustment module (4), matching module (5), storage battery (6) and data feedback module (7).
Described the first electric energy adjustment module comprises the first rectification filtering unit, high-frequency inversion unit and power amplification unit, the first rectification filtering unit transfers to high-frequency inversion unit for electrical network medium and low frequency 50Hz alternating current is changed into direct current, the alternating current that direct current is become high frequency by high-frequency inversion unit is transported to power amplification unit again by power amplification, for wireless transmission of electricity module provides energy.
Described wireless transmission of electricity module comprises transmitting antenna, transmitting antenna control module; In described transmitting antenna, be provided with single-turn circular coil, for high-frequency alternating current is produced to alternating magnetic field by magnetic effect, then the magnetic coupling of process transmitting antenna and reception antenna resonance channel transfer energy; Described transmitting antenna control module comprises antenna time-division device, central processing unit, memory; Antenna time-division device is for control forward delivery of electrical energy and the reverse communication of time-division; Central processing unit is in the time that irrelevant information transmits, and whether the control time-division device of intelligence cuts out; Memory, for storing data that wireless feedback returns, prevents loss.
Described wireless receiving module comprises reception antenna, reception antenna control module; Described wireless receiving antenna is used for receiving wireless transmission of electricity module and launches magnetic energy by the magnetic coupling passage that resonates, in described wireless receiving antenna, be provided with single-turn circular coil for the magnetic energy receiving is become to AC energy by electromagnetic induction, the transfer of data that described wireless receiving antenna feeds back for transmitting data feedback module is to transmitting antenna; Described reception antenna control module is identical with transmitting antenna control module function.
Described the second electric energy adjustment module comprises the second rectification filtering unit, is mainly used for alternating current to be converted into the direct current that is applicable to storage, is transferred to described matching module and mates.
Described matching module comprises load matched module and automatic regulating equipment; Matching module is selected T-shape matching network, regulates relevant parameter to make electric energy by better storing in the storage battery of mining electric locomotive after mating by automatic regulating equipment, makes storage battery reach optimal energy absorption.
Described data feedback module comprises data acquisition module, data processing module; Described data acquisition module is for gathering the power information of the second power module output, described data processor is for changing into the power information collecting the form that is applicable to wireless transmission, be loaded on wireless receiving module, by wireless receiving module, information be oppositely sent to wireless transmission of electricity module with wireless.
Described data analysis module comprises demodulation module, the Data Comparison module of data; Described data demodulation module for by wireless receiving to data carry out demodulation, obtain the data that are applicable to reading; Described Data Comparison module is for drawing the information that needs optimization, regulates after the contrast of the data analysis after demodulation, and the communication after analysis contrast is to the described module of distributing rationally.
The described module of distributing rationally comprises control motor module, motor and explosive-proof protector module, the described module of distributing rationally is controlled motor module and is controlled the rotation of motor for the information that needs to optimize, regulate is imported into, because motor and wireless transmission of electricity module are fixed wtih, so regulate motor rotation to be just equivalent to regulate the distance of the relative coal mine lower shoe of wireless transmission of electricity module, improve delivery of electrical energy efficiency; Explosion-proof module is mainly in particular surroundings, to shield under coal mine.
Electric accumulator motorcycle for mining charging device adopts magnetic coupling resonance mode, carry out wireless power by electrical network to electric accumulator motorcycle for mining, the data that data collecting module collected arrives in electric accumulator motorcycle for mining are after coding, modulation, be loaded into wireless receiving module, carry out the data wireless transmission with electric energy wireless transmission opposite direction.Time-division device control antenna can timesharing receive and dispatch energy and data, by same antenna system but the mutually contrary wireless transmission of carrying out energy and data of direction comprise the first electric energy adjustment module, wireless transmission of electricity module, wireless receiving module, the second electric energy adjustment module, matching module, storage battery and data feedback module, data analysis module, distribute module rationally.
Electric accumulator motorcycle for mining is distributed device rationally and is divided into two parts optimization, and a part is the distance optimization of required adjustment when with electric locomotive generation coupled resonance, and another part is after distance is determined, the matching optimization of load.
The invention has the beneficial effects as follows:
1. method provided by the invention, is not affected by the constraint of transmission line and particular surroundings when mining electric locomotive is charged under colliery, electric energy is passed through to wireless way for transmitting.
2. can effectively improve the charge efficiency of electric locomotive.
3. can improve storage battery electric energy absorbability, prevent that unnecessary loss from appearring in electric energy.
Brief description of the drawings
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is a kind of mining electric locomotive charging device and method structure chart based on wireless transmission of electricity;
Fig. 2 is a kind of mining electric locomotive charging device based on wireless transmission of electricity and the charging workflow diagram of method;
Fig. 3 is the equivalent coil coupling circuit figure in a kind of mining electric locomotive charging device and method based on wireless transmission of electricity;
Fig. 4 is the primary wire equivalent circuit diagram in a kind of mining electric locomotive charging device and method based on wireless transmission of electricity;
Fig. 5 is the secondary wire equivalent circuit diagram in a kind of mining electric locomotive charging device and method based on wireless transmission of electricity;
Fig. 6 is the T-shaped match circuit figure in the secondary wire in a kind of mining electric locomotive charging device and method based on wireless transmission of electricity;
In figure, 1, the first electric energy adjustment module; 2, wireless transmission of electricity module; 3, wireless receiving module; 4, the second electric energy adjustment module; 5, matching module; 6, storage battery; 7, data feedback module; 8, data analysis module; 9, distribute module rationally.
Embodiment
Referring to Fig. 1, wireless charging device of the present invention comprises the first electric energy adjustment module 1, wireless transmission of electricity module 2, wireless receiving module 3, the second electric energy adjustment module 4, matching module 5, storage battery 6, data feedback module 7, data analysis module 8, distributes module 9 rationally and forms.
Described the first electric energy adjustment module 1 comprises the first rectification filtering unit, high-frequency inversion unit, power amplification unit, wherein the first rectification filtering unit comprises rectifier and filter, rectifier is responsible for 50Hz low frequency ac in electrical network to change into Rectified alternating current, alternating component in filter filtering pulsating dc voltage, reduce the ripple coefficient of output voltage, and the more level and smooth direct current of formation waveform, transfer to again high-frequency inversion unit, be required high-frequency alternating current by high-frequency inversion unit by DC inverter, be transported to again power amplification unit by power amplification, thereby provide wireless transmission of electricity module energy to carry out the wireless transmission of energy, by described the first electric energy adjustment module, the AC energy of high frequency is delivered to wireless transmission of electricity module.
Described wireless transmission of electricity module 2 comprises transmitting antenna, transmitting antenna control device; In transmitting antenna, be provided with single-turn circular coil; Transmitting antenna control device comprises transmitting antenna time-division device, central processing unit, memory; Wherein the selection of single-turn circular coil is mainly the magnetic energy for the AC energy of high frequency being induced to alternation, by the magnetic coupling channel transfer that resonates; The wherein material selection copper pipe of transmitting antenna, reception antenna, thus object is in order to reduce internal resistance, saves material and improve efficiency of transmission, wherein copper pipe be according in practice and electric current exist only in skin effect selection in one deck that conductive surface is very thin; Transmitting antenna and accept antenna and be all selected from respectively inductance and the capacitor resonance of body, and transmitting antenna resonance frequency, reception antenna resonance frequency, this three is identical for ac frequency, meets the resonate parameter request of wireless transmission of electricity of magnetic coupling, can form like this magnetic channel; Main four the aspect functions of transmitting antenna control device: the wireless transmission of carrying out electric energy of (1) timesharing; (2) wireless transmission of carrying out data message of timesharing; (3) transmission time of effective and reasonable distribute energy and information; (4) preservation of safe and reliable data, transfers to wireless receiving module by energy by wireless magnetic channel by described wireless transmission of electricity module.
Described wireless receiving module 3 comprises reception antenna and reception antenna control device; Single-turn circular coil in reception antenna is mainly to transmit for magnetic energy is induced to electric energy; Wireless receiving module mainly contains two aspect functions: (1) receives by wireless mode the energy that wireless transmission of electricity module sends over, and transfers the energy to the second electric energy adjustment module; (2) by wireless mode, data feedback module feedack is sent to wireless transmission of electricity module.
Described the second electric energy adjustment module 4 comprises the second rectification filtering unit, and its major function is that the high-frequency alternating current of reception is converted to direct current stably; Its transmission direction mainly contains two aspects: to matching module, mate the Energy Transfer after the second electric energy adjustment module adjusting (1); (2) power data after the second electric energy adjustment module adjusting is transferred to data feedback module.
Described matching module 5 comprises load matched module, automatic regulating equipment; Load matched module is mainly selected T-shaped matching network, is mainly because it can improve amplitude and the efficiency of electric energy, and can increases frequency range and the stability of system; The main mode of operation of automatic regulating equipment is to draw under resonance condition and need to obtain under maximum power state have according to Fig. 4: best mutual inductance
Experiment is determined with MIT
although two mutual inductance expression modes differ, if all meeting two formulas aspect material and components and parts, efficiency of transmission can improve;
Have according to Fig. 5 again
Wherein X
ccan preset a value, can obtain the required numerical value of all the other accessories, so can reach matching effect according to variable-impedance device.Just can be input in the storage battery of mining electric locomotive by the energy matching.
Described storage battery 6 comprises battery, battery management part, and wherein battery uses lithium-ions battery; Battery management part major function be prevent battery reversal connection, overcharge, cross put, overcurrent, short circuit, the protection of inside and outside portion circuit, equalizing charge, electric discharge.
Described data feedback module 7 comprises data acquisition module, data processing module; Wherein data acquisition module is mainly used in gathering the power information of the second electrical energy devices output; Wherein data processor is mainly made up of coding unit, modulating unit, power amplification unit; Be mainly used for the power information collecting to transform into the form that is applicable to wireless transmission, be loaded on wireless receiving module, during due to electric energy wireless transmission resonance condition, there is each other strong energy exchange in transmitting antenna and reception antenna, energy is two-way flow at this moment, existing output is also returned, information can be loaded on the antenna of wireless transmission of electricity simultaneously, two-way wireless transmission of carrying out data, now wireless power transmission and Wireless Data Transmission are to share same transmission channel; In order to prevent confusion, wireless receiving time-division device is by the transmission that separates of energy and data timesharing.
Described data analysis module 8 comprises demodulates information module and Data Comparison module, its major function is the information data message that namely wireless receiving module is launched that demodulation is received by wireless transmission of electricity module, and by after demodulation, analysis, contrast, decide the regulated value that need to change.And regulated value is sent to and distributes module rationally.
The described module 9 of distributing rationally comprises control motor module, motor and explosive-proof protector module, wherein controlling motor module major function is that the data that analyze are changed into mechanical type running, thereby controls and regulate the relative position of wireless transmission of electricity module and wireless receiving module to improve the efficiency of antenna transmission energy; Explosive-proof protector module is mainly humidity, electric leakage and mine explosion in order to prevent all devices under the mine damage to device.
Fig. 2 is a kind of mining electric locomotive charging device based on wireless transmission of electricity and the charging workflow diagram of method, 50Hz alternating current in electrical network is through the first rectification filtering unit, high-frequency inversion unit and power amplification unit obtain the power delivery of high-frequency high-power to wireless transmission of electricity module, produce alternating magnetic field through the single-turn circular coil in wireless transmission of electricity module, by magnetic energy by magnetic coupling resonate form first passage transfer to wireless receiving module, single-turn circular coil in wireless receiving module induces high-frequency current again, high-frequency current is converted to direct current through rectifying and wave-filtering, now the main road of electric energy is to make energy effectively store storage battery into by matching module, and another road is to measure electrical power, the electrical power data message measuring is through coding, after modulation, be loaded into wireless receiving module and carry out data wireless transmission, by second channel, communication is arrived to wireless transmission of electricity module again, the information exchange receiving is crossed after decoding, data are imported in data analysis module, by the analysis of data analysis module, contrast decides motor rotating cycle, thereby promote and stop antenna distance, thereby make distance reach optimum state, wherein in way of contrast, the data of power bracket and enhancement distance are by a large amount of experiments, sorting out summary institute forms, there is certain reliability, validity, rotating cycle and enhancement distance are to have a fixing ratio.
Fig. 3 is the equivalent coil coupling circuit figure in a kind of simple and easy and method of mining electric locomotive charging device based on wireless transmission of electricity, is by the model of whole device circuit system equivalent analysis, like this can be effectively by complicated systematization, be easy to analyze.Wherein V
inrepresent voltage source, R
inrepresent the inherent resistance of voltage source, R
s, R
drepresenting dead resistance, is mainly that ohmic loss and resonance are the losses of radiation, C
s, C
drepresent respectively equivalent capacity, L
s, L
drepresent respectively equivalent inductance, R
wrepresent that loading section reflexes to the resistance of circuit.
Fig. 4 is the primary wire equivalent circuit diagram in a kind of mining electric locomotive charging device and method based on wireless transmission of electricity, wherein Z
sfthat secondary reflection arrives elementary reflected umpedance.
Fig. 5 is the secondary wire equivalent circuit diagram in a kind of mining electric locomotive charging device and method based on wireless transmission of electricity, wherein Z
dfthe elementary secondary reflected umpedance that reflexes to,
it is the equivalent electromotive force that represents to be reflected in due to the coupling influence of primary return secondary loop.Wherein should meet for making secondary coil obtain maximum power
Z
S＝R
in+R
S，Z
D＝R
D+R
W，
Z
Df＝Z
D，Z
Sf＝Z
S
Fig. 6 is the T-shaped match circuit figure in the secondary wire in a kind of mining electric locomotive charging device and method based on wireless transmission of electricity, wherein Z
a=jX
a, Z
b=jX
b, Z
c=jX
c, Z
w=R
w+ jX
w, Z
load=R
load+ jX
loadto pass through X
ccan preset a value, carry out the impedance value of each device that backstepping will meet, reach impedance matching effect.
Claims (9)
1. mining electric locomotive charging device and the method based on wireless transmission of electricity, it is characterized in that: comprise electric energy wireless transmission equipment and the electric energy radio receiver that is positioned at coal mine lower shoe top while being positioned at coal mine lower shoe bottom, described electric energy wireless transmission equipment and the wireless connections of electric energy radio receiver, described electric energy wireless transmission equipment comprises the first electric energy adjustment module, wireless transmission of electricity module, data analysis module and distribute module rationally, described electric energy radio receiver comprises wireless receiving module, the second electric energy adjustment module, matching module, storage battery and data feedback module,
The low frequency ac that described the first electric energy adjustment module is transmitted for receiving electrical network, and the AC energy of the low frequency 50Hz in electrical network is become to high-frequency alternating current energy through over commutation, inversion, and send to wireless transmission of electricity module;
Described wireless transmission of electricity module comprises transmitting antenna and transmitting antenna control module, described wireless receiving module comprises reception antenna and reception antenna control module, the high-frequency alternating current that described transmitting antenna control module sends for receiving the first electric energy adjustment module, and produce alternating magnetic field by the single-turn circular coil arranging in transmitting antenna, and the resonance coupling of transmitting antenna and reception antenna capable become magnetic channel, magnetic energy is transferred to reception antenna by wireless magnetic channel, reception antenna is converted to alternating current by the magnetic energy of reception by its inner single-turn circular coil arranging, pass through again the second electric energy adjustment module that sends to of reception antenna control module timesharing,
The alternating current that described the second electric energy adjustment module sends for receiving wireless receiving antenna control module, and be converted into galvanic current, be transferred to described matching module and mate;
Described matching module mates with storage battery for the direct current that the second electric energy adjustment module is sent, and is transferred in storage battery and stores, and makes storage battery reach optimal energy absorption;
Described data feedback module is for gathering the power data of exporting after the second electric energy adjustment module regulates electric energy, and described power data information is loaded into wireless receiving module, by wireless receiving module, information is oppositely sent to wireless transmission of electricity module with wireless;
Described data analysis module carries out analyzing and processing for the power data that wireless transmission of electricity module is received, and is transferred to the described module of distributing rationally;
The relative position of wireless transmission of electricity module and wireless receiving module is controlled and regulated to the described module of distributing rationally, for the information after data analysis module analyzing and processing is transformed,, improves the efficiency of transmission of electric energy.
2. a kind of mining electric locomotive charging device and method based on wireless transmission of electricity according to claim 1, it is characterized in that, described the first electric energy adjustment module comprises the first rectification filtering unit, high-frequency inversion unit and power amplification unit, the first rectification filtering unit transfers to high-frequency inversion unit for electrical network medium and low frequency alternating current is changed into direct current, the alternating current that direct current is become high frequency by high-frequency inversion unit is transported to power amplification unit again by power amplification, and the energy supply of wireless transmission of electricity module is provided.
3. a kind of mining electric locomotive charging device and method based on wireless transmission of electricity according to claim 1, is characterized in that, described wireless transmission of electricity module comprises transmitting antenna, transmitting antenna control module; In described transmitting antenna, be provided with single-turn circular coil, for high-frequency alternating current is produced to magnetic field by magnetic effect, then pass through the magnetic resonance channel transfer energy of transmitting antenna and reception antenna; Described antenna control module comprises antenna time-division device, central processing unit, memory; Antenna time-division device is for control forward delivery of electrical energy and the reverse communication of time-division; Central processing unit is in the time that irrelevant information transmits, and whether the control time-division device of intelligence cuts out; Memory, for storing data that wireless feedback returns, prevents loss.
4. a kind of mining electric locomotive charging device and method based on wireless transmission of electricity according to claim 1, it is characterized in that, described wireless receiving module comprises reception antenna, reception antenna control module, and described wireless receiving module is for receiving the energy of wireless transmission of electricity module transmitting and the data of transmitting data feedback module feedback.
5. a kind of mining electric locomotive charging device and method based on wireless transmission of electricity according to claim 1, is characterized in that, described the second electric energy adjustment module comprises the second rectification filtering unit, is mainly used for alternating current to be converted into the direct current that is applicable to storage.
6. a kind of mining electric locomotive charging device and method based on wireless transmission of electricity according to claim 1, is characterized in that, described matching module comprises load matching device and automatic regulating equipment; Load matching device is selected T-shape matching network, regulates relevant parameter to make electric energy by mating in the storage battery that is better stored in mining electric locomotive by automatic regulating equipment.
7. a kind of mining electric locomotive charging device and method based on wireless transmission of electricity according to claim 1, is characterized in that, described data feedback module comprises data acquisition module, data processing module; Described data acquisition module is for gathering the power information of the second electric energy adjustment module output, and described data processor, for the power information collecting being changed into the form that is applicable to wireless transmission, is loaded on wireless receiving module, carries out the transmission of wireless data.
8. a kind of mining electric locomotive charging device and method based on wireless transmission of electricity according to claim 1, is characterized in that, described data analysis module comprises demodulation module, the Data Comparison module of data; Described data demodulation module for by wireless receiving to data carry out demodulation, obtain the data that are applicable to reading, described Data Comparison module is for needing by drawing after the data analysis contrast after demodulation the information optimizing, regulate.
9. a kind of mining electric locomotive charging device and method based on wireless transmission of electricity according to claim 1, it is characterized in that, the described module of distributing rationally comprises control motor module, motor and explosive-proof protector module, the described module of distributing rationally is optimized for needing, the information regulating is imported into and is controlled the rotation of controlling motor in motor module, because motor and wireless transmission of electricity module are fixed wtih, so regulate motor rotation to be just equivalent to regulate the distance of the relative coal mine lower shoe of wireless transmission of electricity module, explosion-proof module is mainly in particular surroundings, to shield under coal mine,
Electric accumulator motorcycle for mining charging device adopts the charging of magnetic coupling resonance mode, carry out wireless power by electrical network to electric accumulator motorcycle for mining, the data that data collecting module collected arrives in electric accumulator motorcycle for mining are after coding, modulation, be loaded into radio receiver, carry out and the rightabout data wireless transmission of electric energy wireless transmission.Time-division device control antenna can timesharing receive and dispatch energy and data, by same antenna system but the mutually contrary wireless transmission of carrying out energy and data of direction comprise the first electric energy adjustment module, wireless transmission of electricity module, wireless receiving module, the second electric energy adjustment module, matching module, storage battery and data feedback module, data analysis module, distribute module rationally;
Electric accumulator motorcycle for mining is distributed device rationally and is divided into two parts optimization, and a part is the distance optimization of required adjustment when with electric locomotive generation coupled resonance, and another part is after distance is determined, the matching optimization of load.
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| CN104104139B (en) | 2017-09-15 |
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