CN114938083A - Position detection device and mobile wireless power transmission system - Google Patents

Position detection device and mobile wireless power transmission system Download PDF

Info

Publication number
CN114938083A
CN114938083A CN202210688492.2A CN202210688492A CN114938083A CN 114938083 A CN114938083 A CN 114938083A CN 202210688492 A CN202210688492 A CN 202210688492A CN 114938083 A CN114938083 A CN 114938083A
Authority
CN
China
Prior art keywords
capacitor
energy
detection
coil
converter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210688492.2A
Other languages
Chinese (zh)
Inventor
江炳蔚
蒋成
魏斌
徐翀
吴晓康
于杰
徐锦星
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Electric Power Research Institute Co Ltd CEPRI
Original Assignee
China Electric Power Research Institute Co Ltd CEPRI
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Electric Power Research Institute Co Ltd CEPRI filed Critical China Electric Power Research Institute Co Ltd CEPRI
Priority to CN202210688492.2A priority Critical patent/CN114938083A/en
Publication of CN114938083A publication Critical patent/CN114938083A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/12—Inductive energy transfer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/30—Constructional details of charging stations
    • B60L53/35—Means for automatic or assisted adjustment of the relative position of charging devices and vehicles
    • B60L53/38—Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/01—Resonant DC/DC converters
    • H02M3/015—Resonant DC/DC converters with means for adaptation of resonance frequency, e.g. by modification of capacitance or inductance of resonance circuit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
    • H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention belongs to the field of electric energy transmission, and discloses a position detection device and a mobile wireless electric energy transmission system, wherein the position detection device comprises a detection transmitting coil, a detection receiving coil, a direct-current/alternating-current converter, an alternating-current/direct-current converter and a voltage detector; the first output end of the DC-AC converter is connected with the first end of the detection transmitting coil, and the second output end of the DC-AC converter is connected with the second end of the detection transmitting coil; the first end of the detection receiving coil is connected with the first input end of the AC-DC converter, and the second end of the detection receiving coil is connected with the second input end of the AC-DC converter; the output end of the AC-DC converter is connected with the voltage detector. The mobile wireless power transmission system comprises a switching controller, an energy receiving coil, an energy receiving control circuit, a plurality of energy emitting coils, an energy emitting control circuit and a plurality of position detection devices. The position of the mobile terminal can be accurately detected, and the accuracy and the reliability of the mobile wireless power transmission system are effectively improved.

Description

Position detection device and mobile wireless power transmission system
Technical Field
The invention belongs to the field of electric energy transmission, and relates to a position detection device and a mobile wireless electric energy transmission system.
Background
The magnetic coupling resonance type wireless power transmission system has wide application prospect in advancing vehicles such as electric automobiles, inspection robots and the like. At present, the equipment generally adopts a contact type charging mode, a charging interface is easy to damage, a wire insulating layer is easy to damage, and extreme weather and climate are difficult to deal with. And portable wireless power transmission system realizes "walking while filling" of vehicle through laying whole transmitting coil, consequently can increase the continuation of the journey mileage of vehicle on the basis that reduces on-vehicle battery, is the wireless power transmission mode who has the most prospect of application on electric vehicle, can reduce the battery deposit of equipment self by a wide margin, alleviates equipment weight, promotes the operating efficiency. In addition, along with the improvement of automation and intelligent degree, the equipment can independently search the source, and the automation degree is improved.
At present, the mobile wireless power transmission adopting the segmented transmitting coil needs to be switched to the corresponding transmitting coil according to the position of the vehicle, and the scheme for detecting the real-time position of the vehicle mainly comprises the following steps: the scheme 1 is that the vehicle position is determined by utilizing sensors such as infrared sensors, magnetic resistance sensors, radar sensors and the like; the case 2 is a position determined by the occurrence of phase reversal at a specific position by detecting the coil current phase.
The scheme 1 depends heavily on the judgment accuracy of the sensor, and cannot realize specific identification, so that the method is only suitable for closed scenes such as a rail transit system, and for roads with high openness, due to the fact that various vehicles exist in the roads, the sensors are easily shielded, erroneous judgment of the sensors is caused, misoperation of transmitting coils is caused, and system abnormity is caused. Scheme 2 is present more widely used vehicle judgement scheme, and this scheme needs to set up two signal detection coils in transmitting coil below, through detecting two signal detection coil current phase, if two signal detection coil current phase appear opposite whether, judge vehicle position. However, the signal detection coil in the scheme has a relatively large size and is difficult to manufacture, and the implementation of the scheme requires a complex signal processing circuit including a multi-stage filter, an amplifier and the like, which brings a great challenge to debugging.
Disclosure of Invention
The invention aims to overcome the defects that the real-time position of a vehicle is not accurate and is difficult to realize in the prior art, and provides a position detection device and a mobile wireless power transmission system.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
in a first aspect of the present invention, a position detecting apparatus includes a detection transmitting coil, a detection receiving coil, an ac-dc converter, and a voltage detector;
the input end of the DC-AC converter is used for connecting a DC power supply, the first output end of the DC-AC converter is connected with the first end of the detection transmitting coil, and the second output end of the DC-AC converter is connected with the second end of the detection transmitting coil;
the first end of the detection receiving coil is connected with the first input end of the AC-DC converter, and the second end of the detection receiving coil is connected with the second input end of the AC-DC converter;
the output end of the AC-DC converter is connected with the voltage detector.
Optionally, the capacitor further includes a first capacitor, a second capacitor, and a third capacitor;
the first output end is connected with the first end of the detection transmitting coil through a first capacitor; the second end of the detection receiving coil is connected with the second input end of the alternating current-direct current converter through a second capacitor; the output end of the AC-DC converter is connected with the voltage detector through a third capacitor.
Optionally, the dc-ac converter includes a fourth capacitor, a fifth capacitor, and a half-bridge inverter circuit; the input end of the half-bridge inverter circuit is connected with the first end of the fourth capacitor and the first end of the fifth capacitor; the second end of the fourth capacitor is connected with the second end of the fifth capacitor; the output end of the half-bridge inverter circuit is connected with the first end of the detection transmitting coil; the second end of the fourth capacitor and the second end of the fifth capacitor are both connected with the second end of the detection receiving coil; and the first end of the fourth capacitor and the first end of the fifth capacitor are both used for connecting a direct-current power supply.
Optionally, the ac-dc converter is a first uncontrolled rectifier.
In a second aspect of the present invention, a mobile wireless power transmission system includes a switching controller, an energy receiving coil, an energy receiving control circuit, a plurality of energy transmitting coils, an energy transmitting control circuit, and a plurality of position detecting devices as described above;
the position detection devices share one detection transmitting coil and one voltage detector, and the detection transmitting coil, the energy receiving coil and the energy receiving control circuit are all used for being carried on the mobile terminal; the energy transmitting coils and the detecting receiving coils of the position detecting devices are sequentially and alternately arranged; the energy emission control circuit is connected with the energy emission coils, and the switching controller is connected with the voltage detector and the energy emission control circuit;
the voltage detector is used for detecting the voltage of each detection receiving coil, obtaining a detection signal and sending the detection signal to the switching controller, and the switching controller is used for switching the working state of each energy transmitting coil through the energy transmitting control circuit according to the detection signal.
Optionally, the energy storage device further comprises an energy storage battery, and the energy storage battery is connected with the energy receiving coil through an energy receiving control circuit.
Optionally, the working frequencies of the energy receiving coil and the energy transmitting coil are both 85kHz, and the working frequencies of the detection transmitting coil and the detection receiving coil are both 620.5-1580 kHz.
Optionally, the energy receiving coil is a double-layer coil.
Optionally, the energy receiving control circuit includes a sixth capacitor, a second uncontrolled rectifier, and a seventh capacitor;
the first end of the sixth capacitor is connected with the first end of the energy receiving coil, and the second end of the sixth capacitor is connected with the first input end of the second uncontrolled rectifier; the second input end of the second uncontrolled rectifier is connected with the second end of the energy receiving coil;
and the output end of the second uncontrolled rectifier is connected with a seventh capacitor in parallel.
Optionally, the energy emission control circuit includes a third uncontrolled rectifier, an eighth capacitor, a full bridge inverter, an inductor, a ninth capacitor, and a tenth capacitor;
the input end of the third uncontrolled rectifier and one end of the eighth capacitor are both used for connecting an energy source, and the output end of the third uncontrolled rectifier is sequentially connected with the eighth capacitor and the full-bridge inverter in parallel; the first output end of the full-bridge inverter is sequentially connected with the inductor and the first end of the ninth capacitor, and the second end of the ninth capacitor is connected with the first ends of the energy transmitting coils; the second output end of the full-bridge inverter is connected with the first end of the tenth capacitor and the second ends of the energy transmitting coils; the second end of the tenth capacitor is connected with the connecting line between the inductor and the first end of the ninth capacitor.
Compared with the prior art, the invention has the following beneficial effects:
the position detection device provided by the invention is based on the induction effect between the detection transmitting coil and the detection receiving coil, combines the conversion of the DC-AC converter and the AC-DC converter, finally detects the DC voltage at the output end of the AC-DC converter through the voltage detector, realizes the accurate detection of the real-time position of the detection transmitting coil relative to the detection receiving coil, can accurately and effectively detect the real-time position of the object to be detected carrying the detection transmitting coil, has a simple structure, does not need to use a complex signal processing circuit, is convenient to realize and has low cost.
The mobile wireless power transmission system of the invention is based on the arrangement of a plurality of position detection devices which share one detection transmitting coil and one voltage detector, realizes the accurate detection of the position of the mobile terminal in the range of the arrangement of the detection receiving coil, meanwhile, by adopting the mode that a plurality of energy transmitting coils and a plurality of detection receiving coils of the position detection device are sequentially and alternately arranged, according to the induction results of the plurality of detection receiving coils, correspondingly switching the working state of each energy transmitting coil to realize stable energy transmission between the energy receiving coil and the energy transmitting coil, and the magnetic coupling mechanisms of the energy transmitting coil and the detection receiving coil are in an alternate arrangement structure, which is beneficial to reducing the mutual inductance between the energy transmitting coil and the detection receiving coil, thereby reducing the influence of energy transmitting transmission on position detection.
Drawings
FIG. 1 is a topological diagram of a position detection apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the arrangement positions of the detection receiving coil and the energy transmitting coil according to the embodiment of the invention;
fig. 3 is a topological diagram of an energy transmission device according to an embodiment of the present invention.
Wherein: 1-detecting a receiving coil; 2-energy transmitting coil.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, in an embodiment of the present invention, a position detecting device is provided, which can be applied to an electric vehicle to accurately detect a position of the electric vehicle, and further switch to a corresponding energy transmitting coil 2 according to the position of the electric vehicle, so as to effectively improve accuracy and reliability of a mobile wireless power transmission system.
Specifically, the position detection device comprises a detection transmitting coil, a detection receiving coil, an AC-DC converter and a voltage detector; the input end of the DC-AC converter is used for connecting a DC power supply, the first output end of the DC-AC converter is connected with the first end of the detection transmitting coil, and the second output end of the DC-AC converter is connected with the second end of the detection transmitting coil; the first end of the detection receiving coil is connected with the first input end of the AC-DC converter, and the second end of the detection receiving coil is connected with the second input end of the AC-DC converter; the output end of the AC-DC converter is connected with the voltage detector.
In the present embodiment, the electric vehicle is taken as an example to be described as an object to be detected, and the detection receiving coil 1 is disposed on a set area on the ground.
The input end of the DC-AC converter can be connected with a vehicle-mounted battery of the electric vehicle, the vehicle-mounted battery of the electric vehicle provides direct current, and the direct current is converted into high-frequency alternating current through the DC-AC converter after being converted by the DC-AC converter. When the detection transmitting coil moves into the coupling area of the detection receiving coil 1, the detection receiving coil 1 induces the high-frequency alternating current of the detection transmitting coil, the high-frequency alternating current is converted into direct current through the alternating current-direct current converter, then the direct current voltage of the direct current is detected through the voltage detector, and the direct current voltage is compared with a preset reference voltage, wherein the reference voltage can be the actually measured voltage of the output end of the alternating current-direct current converter when the detection transmitting coil moves out of the coupling area of the detection receiving coil 1.
Therefore, based on the induction phenomenon between the detection transmitting coil and the detection receiving coil 1, when the current direct current voltage is greater than the reference voltage, it indicates that the detection transmitting coil moves into the coupling region of the detection receiving coil 1, that is, the electric vehicle moves into the coupling region of the detection receiving coil 1, thereby implementing real-time position detection of the electric vehicle.
The position detection device is based on the induction effect between the detection transmitting coil and the detection receiving coil 1, combines the conversion of the DC-AC converter and the AC-DC converter, finally detects the DC voltage at the output end of the AC-DC converter through the voltage detector, realizes the accurate detection of the real-time position of the detection transmitting coil relative to the detection receiving coil 1, further can accurately and effectively detect the real-time position of the object to be detected carrying the detection transmitting coil, has simple structure, does not need to use a complex signal processing circuit, is convenient to realize and has low cost.
In a possible embodiment, the position detection device further comprises a first capacitor C 1 A second capacitor C 2 And a third capacitance C 3 (ii) a The first output end passes through a first capacitor C 1 Connecting a first end of a detection transmitting coil; detecting the second end of the receiving coil 1 passing through the second capacitor C 2 The second input end of the AC-DC converter is connected; the output end of the AC-DC converter passes through a third capacitor C 3 Is connected with the voltage detector.
In particular, the first capacitor C 1 First, aTwo capacitors C 2 Detecting the self-inductance L of the transmitting coil P And detecting the self-inductance L of the receiving coil 1 S A first capacitor C for resonance compensation 1 And detecting the self-inductance L of the transmitting coil P As a resonance compensation circuit at the transmitting end, a second capacitor C 2 And detecting the self-inductance L of the receiving coil 1 S As a receiving end resonance compensation circuit. Meanwhile, the transmission power required by the position detection device is not very large, and the S-S type resonance compensation circuit is adopted, so that the structure of the position detection device can be simplified to a certain extent, and the design difficulty and the cost are further reduced. Third capacitor C 3 The filter capacitor plays a role in filtering.
In a possible embodiment, the dc-ac converter comprises a fourth capacitor C 4 A fifth capacitor C 5 And a half-bridge inverter circuit; input end of half-bridge inverter circuit and fourth capacitor C 4 First terminal and fifth capacitor C 5 Are all connected; fourth capacitor C 4 Is connected with the second end of the fifth capacitor; the output end of the half-bridge inverter circuit is connected with the first end of the detection transmitting coil; fourth capacitor C 4 Second terminal and fifth capacitor C 5 The second ends of the detection receiving coils 1 are connected with the second end of the detection receiving coil; fourth capacitor C 4 First terminal of and fifth capacitance C 5 Are used for connecting a direct current power supply.
In particular, the fourth capacitor C 4 And a fifth capacitance C 5 Generally, a larger capacitor is selected to be connected to the third capacitor C 3 The filter capacitor is also used as a filter capacitor and has a filtering function after being connected in parallel. The half-bridge inverter circuit is composed of two MOS tubes VT 1 And VT 2 And two diodes VD 1 And VD 2 Together configured to convert direct current to high frequency alternating current.
In one possible embodiment, the ac-dc converter is a first uncontrolled rectifier. Specifically, the first uncontrolled rectifier consists of four diodes VD 3 、VD 4 、VD 5 And VD 6 And is constructed to convert the high-frequency alternating current induced in the detection receiving coil 1 into direct current.
Referring to fig. 2 and 3, in another embodiment of the present invention, a mobile wireless power transmission system is provided, which includes a switching controller, an energy receiving coil, an energy receiving control circuit, a plurality of energy transmitting coils 2, an energy transmitting control circuit, and a plurality of position detecting devices as described above. The system comprises a plurality of position detection devices, a detection transmitting coil, an energy receiving coil and an energy receiving control circuit, wherein the position detection devices share the detection transmitting coil and a voltage detector; the energy transmitting coils 2 and the detecting receiving coils 1 of the position detecting devices are alternately arranged in sequence; the energy emission control circuit is connected with the energy emission coils 2, and the switching controller is connected with the voltage detector and the energy emission control circuit; the voltage detector is used for detecting the voltage of each detection receiving coil 1 to obtain a detection signal and sending the detection signal to the switching controller, and the switching controller is used for switching the working state of each energy transmitting coil 2 through the energy transmitting control circuit according to the detection signal.
Based on the mode that a plurality of energy transmitting coils 2 and a plurality of position detection devices are arranged in turn and alternately by detecting receiving coils 1, the detecting receiving coils 1 and the energy transmitting coils 2 adopt a separated design, and the detecting receiving coils 1 are used as independent coils and are arranged between two adjacent energy transmitting coils 2 or on one side of the edge energy transmitting coils 2. When the mobile terminal just enters the charging area, the mobile terminal is opposite to the first detection receiving coil 1, so that the first energy transmitting coil 2 is turned on, and the rest energy transmitting coils 2 are turned off. When the mobile terminal moves further, the second detection receiving coil 1 senses the position of the mobile terminal, the first energy transmitting coil 2 and the third energy transmitting coil 2 are closed, and the second energy transmitting coil 2 is opened. And repeating the steps until the mobile terminal leaves the wireless charging area, so as to realize the position detection of the mobile terminal and the mobile wireless charging.
The mobile wireless power transmission system of the invention is based on the arrangement of a plurality of position detection devices which share a detection transmitting coil and a voltage detector, realizes the accurate detection of the position of a mobile terminal in the arrangement range of a detection receiving coil 1, meanwhile, by adopting the mode that a plurality of energy transmitting coils 2 and a plurality of detection receiving coils 1 of the position detection device are alternately arranged in sequence, according to the induction results of the plurality of detection receiving coils 1, correspondingly switching the working state of each energy transmitting coil 2 to realize stable energy transmission between the energy receiving coil and the energy transmitting coil 2, and the magnetic coupling mechanisms of the energy transmitting coil 2 and the detection receiving coil 1 adopt an alternate arrangement structure, which is beneficial to reducing the mutual inductance between the energy transmitting coil 2 and the detection receiving coil 1, thereby reducing the influence of energy transmitting transmission on position detection.
In a possible implementation manner, the mobile wireless power transmission system further comprises an energy storage battery, and the energy storage battery is connected with the energy receiving coil through the energy receiving control circuit. Specifically, by arranging the energy storage battery, the energy obtained by the induction of the energy receiving coil can be well stored without being instantly consumed.
In a possible implementation mode, the working frequencies of the energy receiving coil and the energy transmitting coil 2 are both 85kHz, and the working frequencies of the detection transmitting coil and the detection receiving coil 1 are both 620.5-1580 kHz, preferably 1000 kHz.
Specifically, because the energy receiving coil and the energy transmitting coil 2, and the detecting transmitting coil and the detecting receiving coil 1 both realize work through magnetic coupling, in order to reduce the problem of mutual influence between the energy receiving coil and the energy transmitting coil 2 in the operation process as much as possible, the working frequency of each coil needs to be reasonably selected.
In one possible embodiment, the energy receiving coil is a double-layer coil. Specifically, because most of mobile terminals have limited space, such as an electric vehicle chassis, the energy receiving coil is designed as a double-layer coil, and the pick-up capability of the energy receiving coil is enhanced.
In one possible embodiment, the energy source is connected toThe receiving control circuit comprises a sixth capacitor C 6 A second uncontrolled rectifier and a seventh capacitor C 7 (ii) a Sixth capacitor C 6 The first end of the energy receiving coil is connected with the first end of the energy receiving coil, and the second end of the energy receiving coil is connected with the first input end of the second uncontrolled rectifier; the second input end of the second uncontrolled rectifier is connected with the second end of the energy receiving coil; the output end of the second uncontrolled rectifier is connected with a seventh capacitor C in parallel 7 。
In particular, the second uncontrolled rectifier consists of four diodes VD 71 、VD 81 、VD 91 And VD 101 The energy receiving coil is used for receiving high-frequency alternating current induced by the energy receiving coil and converting the high-frequency alternating current into direct current, and then the energy storage battery can be supplied with power through the energy storage battery charging circuit. Sixth capacitor C 6 Self-inductance L with energy-receiving coil S1 A seventh capacitor C forming a resonance compensation circuit at the receiving end 7 The filter capacitor mainly plays a role in filtering.
In a possible embodiment, the energy emission control circuit comprises a third uncontrolled rectifier, an eighth capacitor C 8 Full bridge inverter, inductor L 1 A ninth capacitor C 9 And a tenth capacitance C 10 . Wherein, the input end of the third uncontrolled rectifier and the eighth capacitor C 8 One end of the third uncontrolled rectifier is connected with an energy source, and the output end of the third uncontrolled rectifier is connected with an eighth capacitor C in parallel in sequence 8 And a full bridge inverter; the first output end of the full-bridge inverter is sequentially connected with an inductor L 1 And a ninth capacitor C 9 A first terminal of (C), a ninth capacitor C 9 The second ends of the energy transmitting coils are connected with the first ends of the energy transmitting coils 2; second output end of full-bridge inverter and tenth capacitor C 10 And second ends of the plurality of energy transmitting coils 2 are connected; a tenth capacitor C 10 Second terminal of (1) and the inductance and the ninth capacitance C 9 Is connected with the first end of the first connecting wire.
Specifically, the energy transmission module inputs selectable single-phase power frequency alternating current U i The third uncontrolled rectifier consists of four diodes VD 11 、VD 21 、VD 31 And VD 41 Formed jointly for single-phase mains-frequency alternating current U i The full-bridge inverter is converted into direct current and consists of four MOS tubes VT 11 、VT 21 、VT 31 And VT 41 The structure is combined, and the direct current is converted into high-frequency alternating current. Inductor L 1 A ninth capacitor C 9 A tenth capacitor C 10 And self-inductance L of the energy transmitting coil 2 P1 Form a transmitting end resonance compensation circuit, an eighth capacitor C 8 The filter capacitor mainly plays a role in filtering.
The resonance compensation circuit of the LCC-S structure is formed by the resonance compensation circuit of the transmitting end of the energy transmitting control circuit and the resonance compensation circuit of the receiving end of the energy receiving control circuit, and the current of the transmitting end can be effectively kept constant by adopting the resonance compensation circuit of the LCC-S structure based on larger power of energy transmission.
In a possible embodiment, the energy transmission coil 2 has dimensions of 80cm long and 40cm wide, and the energy reception coil has a radius of 20cm, the specific parameters of the energy transmission coil 2 and the energy reception coil being referred to in table 1.
TABLE 1 energy transmitting coil 2 and energy receiving coil parameter table
Parameter name Transmitting end coil Receiving end coil
Outer dimension of coil 80×40cm Radius 20cm
Inner dimension of coil 50×10cm Radius of 10cm
Number of turns 21 turn (L) 10 turns
Number of litz wire strands 1300 ply 2000 ply
Litz wire diameter 13mm 20mm
Whether or not there is a magnetic core Is that Is that
Self-inductance 361μH 53μH
Considering that the mobile terminal needs to arrange the energy receiving coil and the detection transmitting coil at the same time, the spatial position of the mobile terminal is limited, the transmission power of the detection transmitting coil is not large, the design of the detection transmitting coil is simpler, the size of the detection transmitting coil is consistent with that of the energy receiving coil, the outer size of the detection transmitting coil is a square coil of 20 multiplied by 20cm, and specific parameters are shown in table 2.
TABLE 2 parameter table for detecting transmitting coil and detecting receiving coil 1
Parameter name Transmitting end coil Receiving end coil
Outer dimension of coil 20×20cm 20×40cm
Inner dimension of coil 5×5cm 5×25cm
Number of turns of coil 10 turns 10 turns
Number of litz wire strands 1000 shares of 1000 shares of
Whether or not there is a magnetic core Is (shared) Whether or not
The above contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention should not be limited thereby, and any modification made on the basis of the technical idea proposed by the present invention falls within the protection scope of the claims of the present invention.

Claims (10)

1. A position detection device is characterized by comprising a detection transmitting coil, a detection receiving coil, an AC-DC converter and a voltage detector;
the input end of the DC-AC converter is used for connecting a DC power supply, the first output end of the DC-AC converter is connected with the first end of the detection transmitting coil, and the second output end of the DC-AC converter is connected with the second end of the detection transmitting coil;
the first end of the detection receiving coil is connected with the first input end of the AC-DC converter, and the second end of the detection receiving coil is connected with the second input end of the AC-DC converter;
the output end of the AC-DC converter is connected with the voltage detector.
2. The position detection device according to claim 1, characterized by further comprising a first capacitance, a second capacitance, and a third capacitance;
the first output end is connected with the first end of the detection transmitting coil through a first capacitor; a second end of the detection receiving coil is connected with a second input end of the AC-DC converter through a second capacitor; and the output end of the AC-DC converter is connected with the voltage detector through a third capacitor.
3. The position detecting apparatus according to claim 1, wherein the dc-ac converter includes a fourth capacitor, a fifth capacitor, and a half-bridge inverter circuit; the input end of the half-bridge inverter circuit is connected with the first end of the fourth capacitor and the first end of the fifth capacitor; the second end of the fourth capacitor is connected with the second end of the fifth capacitor; the output end of the half-bridge inverter circuit is connected with the first end of the detection transmitting coil; the second end of the fourth capacitor and the second end of the fifth capacitor are both connected with the second end of the detection receiving coil; and the first end of the fourth capacitor and the first end of the fifth capacitor are both used for connecting a direct-current power supply.
4. The position sensing device of claim 1, wherein the ac-dc converter is a first uncontrolled rectifier.
5. A mobile wireless power transmission system, comprising a switching controller, an energy receiving coil, an energy receiving control circuit, a plurality of energy transmitting coils, an energy transmitting control circuit, and a plurality of position detecting devices according to any one of claims 1 to 4;
the position detection devices share one detection transmitting coil and one voltage detector, and the detection transmitting coil, the energy receiving coil and the energy receiving control circuit are all used for being carried on the mobile terminal; the energy transmitting coils and the detecting receiving coils of the position detecting devices are sequentially and alternately arranged; the energy emission control circuit is connected with the energy emission coils, and the switching controller is connected with the voltage detector and the energy emission control circuit;
the voltage detector is used for detecting the voltage of each detection receiving coil to obtain a detection signal and sending the detection signal to the switching controller, and the switching controller is used for switching the working state of each energy transmitting coil through the energy transmitting control circuit according to the detection signal.
6. The mobile wireless power transmission system of claim 5, further comprising an energy storage battery, wherein the energy storage battery is connected to the energy receiving coil through the energy receiving control circuit.
7. The mobile wireless power transmission system according to claim 5, wherein the energy receiving coil and the energy transmitting coil both have an operating frequency of 85kHz, and the detecting transmitting coil and the detecting receiving coil both have an operating frequency of 620.5-1580 kHz.
8. The mobile wireless power transfer system of claim 5, wherein the energy receiving coil is a double-layer coil.
9. The mobile wireless power transfer system of claim 5, wherein the energy reception control circuit comprises a sixth capacitor, a second uncontrolled rectifier, and a seventh capacitor;
the first end of the sixth capacitor is connected with the first end of the energy receiving coil, and the second end of the sixth capacitor is connected with the first input end of the second uncontrolled rectifier; the second input end of the second uncontrolled rectifier is connected with the second end of the energy receiving coil;
and the output end of the second uncontrolled rectifier is connected with a seventh capacitor in parallel.
10. The mobile wireless power transfer system of claim 5, wherein the energy emission control circuit comprises a third uncontrolled rectifier, an eighth capacitor, a full bridge inverter, an inductor, a ninth capacitor, and a tenth capacitor;
the input end of the third uncontrolled rectifier and one end of the eighth capacitor are both used for connecting an energy source, and the output end of the third uncontrolled rectifier is sequentially connected with the eighth capacitor and the full-bridge inverter in parallel; the first output end of the full-bridge inverter is sequentially connected with the inductor and the first end of the ninth capacitor, and the second end of the ninth capacitor is connected with the first ends of the energy transmitting coils; the second output end of the full-bridge inverter is connected with the first end of the tenth capacitor and the second ends of the energy transmitting coils; the second end of the tenth capacitor is connected with the connecting line between the inductor and the first end of the ninth capacitor.
CN202210688492.2A 2022-06-17 2022-06-17 Position detection device and mobile wireless power transmission system Pending CN114938083A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210688492.2A CN114938083A (en) 2022-06-17 2022-06-17 Position detection device and mobile wireless power transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210688492.2A CN114938083A (en) 2022-06-17 2022-06-17 Position detection device and mobile wireless power transmission system

Publications (1)

Publication Number Publication Date
CN114938083A true CN114938083A (en) 2022-08-23

Family

ID=82869284

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210688492.2A Pending CN114938083A (en) 2022-06-17 2022-06-17 Position detection device and mobile wireless power transmission system

Country Status (1)

Country Link
CN (1) CN114938083A (en)

Similar Documents

Publication Publication Date Title
JP6140220B2 (en) Wireless power transmission in electric vehicles
Cai et al. A cost-effective segmented dynamic wireless charging system with stable efficiency and output power
Mude Battery charging method for electric vehicles: From wired to on-road wireless charging
KR101932822B1 (en) Systems and methods for bi-state impedance conversion in wireless power transfer
EP2997642B1 (en) Wireless power transmission for battery charging
EP3631945B1 (en) Multi-mode wireless power receiver control
CN102969801B (en) Current type wireless power supply system load identification method
CN108718117B (en) Double-pickup three-phase dynamic wireless power transmission system with constant output voltage
JP6487825B2 (en) Non-contact power transmission system and power transmission device
CN102969802A (en) Current type wireless power supply system load self-adapting control method
CN105262189A (en) Wireless charging system of electric logistic vehicle AGV
US11159048B2 (en) Wireless power transmission system, power transmitting device, and power receiving device with circuit to apply a trigger signal
US10333355B2 (en) Wireless charging magnetic parameter determination
US10797506B2 (en) DC to AC power conversion using a wireless power receiver
KR101673353B1 (en) Wireless charging device and receiving circuit thereof
CN206077030U (en) A kind of wireless charging device of electric bus
JP5761508B2 (en) Power transmission system
Qi et al. Research on metal object detection of MCR-WPT system that allows transmisson coils to be misaligned
CN114938083A (en) Position detection device and mobile wireless power transmission system
CN112311102B (en) Non-contact rail transit power supply system and method
CN114362387A (en) Multi-parameter online identification system and method for composite PWM control wireless power transmission system
JP5761507B2 (en) Power transmission system
JP5812264B2 (en) Power transmission system
Hata et al. Efficiency maximization of wireless power transfer based on simultaneous estimation of generalized two parameters
US10771033B2 (en) Electrical feed line integrated filtering for inductive power transfer systems

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination