CN113726026A - board integrated wireless power transmission device and coupling mechanism parameter design method thereof - Google Patents
board integrated wireless power transmission device and coupling mechanism parameter design method thereof Download PDFInfo
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- CN113726026A CN113726026A CN202111004095.0A CN202111004095A CN113726026A CN 113726026 A CN113726026 A CN 113726026A CN 202111004095 A CN202111004095 A CN 202111004095A CN 113726026 A CN113726026 A CN 113726026A
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- 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
- H02J50/005—Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
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- 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
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- 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
- B60L53/126—Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
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- 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
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- 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
- H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
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- 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
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- 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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- 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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- 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
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- 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
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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- Computer Networks & Wireless Communication (AREA)
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
Abstract
The invention relates to the technical field of ship wireless charging, and particularly discloses an plate integrated wireless power transmission device and a coupling mechanism parameter design method thereof. The energy transmitting module is provided with a shore-based transmitting coil and an automatic adjusting mechanism, and the shore-based transmitting coil is in a long track type along the direction of the edge of the shore base. The energy pickup module is provided with a ship-borne receiving coil, and an alignment mechanism and a distance measuring sensor which are arranged in the center of the ship-borne receiving coil. When a ship stops, the board is unfolded to the shore-based ground, the automatic adjusting mechanism is matched with the aligning mechanism and the distance measuring sensor, the shore-based transmitting coil is automatically aligned above the shipborne receiving coil, electric energy supply is realized while the ship stops on the shore, three-dimensional space omnidirectional offset of the coupling mechanism which possibly occurs is converted into offset and angle offset in the front-back direction of the ship, and offset resistance is easy to realize.
Description
Technical Field
The invention relates to the technical field of wireless charging of ships, in particular to an board integrated wireless power transmission device and a coupling mechanism parameter design method thereof.
Background
During the port-in period of ships, the fuel oil generator on the ships is mainly used for meeting the self electricity demand, and the exhaust emission of the generator causes great pollution to port air and water areas. Meanwhile, the operation of the generator can generate larger noise, and the work and life of nearby residents and crews are influenced. This problem is best solved if the harbour ship can be powered off using an onshore power system.
The shore power technology of the ship is to allow the ship provided with special equipment to be connected into a power grid on the land side of a wharf during berthing, and obtain power required by a water pump, communication, ventilation, illumination and other facilities of the ship from the shore, so that a fuel oil generator of the ship is turned off, and the emission amount of waste gas is reduced. In 2000, the high-voltage shore power system was installed for the first time in the goldberg port ferry terminal in sweden. Statistically, this technique reduces the amount of pollutants discharged during the port of ships by 94-97%. Subsequently, many ports abroad are also successively installed with shore power systems. In recent years, the attention of China on energy conservation, emission reduction and environmental protection is higher and higher. In 2009, the Qingdao harbor firstly completed the shore power transformation of partial wharfs domestically, and the shore power technology is also practically applied to more and more wharfs domestically nowadays.
Existing shore power technology is the transfer of electrical energy between a ship and shore through cables and plugs. Despite the increasing maturity of this technology, there are still some problems that are difficult to solve: first, in a wet environment filled with salt water, the cables and plugs can suffer from mechanical wear and corrosion, resulting in additional maintenance costs and safety hazards. Particularly, in rainy and snowy weather, the plug and the socket are easy to cause electric leakage. Second, the electrical system of the power supply system in our country does not match the electrical system on the ship. A three-phase four-wire TN system is usually adopted in port and wharf, a three-phase three-wire IT system is mostly adopted in ships, and if the TN system directly supplies power to the IT system, safety problems such as insulation breakdown are easily caused. Thirdly, the power frequency in China is 50Hz, and if power is supplied to foreign 60Hz ships, a high-power frequency converter is needed. Fourth, the connection and disconnection of the cable is usually performed with the assistance of a person who inserts or removes the plug from the socket. This process typically takes several minutes or more and is unsafe for a person to touch directly.
The existing shore power technology has the problems which are difficult to solve, and the electric isolation between the ship power system and the shore power system is difficult to realize by a cable connection mode. Therefore, to solve the problem of electrical isolation, a non-contact power transmission method, which is a wireless power transmission technology, needs to be used.
However, for the magnetic coupling mechanism device for energy transmission in the ship wireless power transmission system, the ship-borne receiving device is generally vertically fixed on the side of the ship board, and the corresponding shore-based transmitting module is vertically installed on the ground fixed equipment. The offset between the shore-based energy emitting module and the on-board energy pickup module is of a certain range beyond which the pickup power may not reach the required level. Therefore, accurate alignment between the two is very important. However, the ship body shakes due to wave fluctuation, and when the ship body stops on the shore, part of mechanical waves bounce back to the shore and sometimes overlap to increase the amplitude, so that the jolting and the shaking of the ship are more serious. The direction of the ship body shaking is uncertain, so that the coupling mechanism can be transversely, longitudinally or comprehensively deviated, and the common vertically-opposite energy transmitting device and the energy receiving device have great alignment difficulty.
Disclosure of Invention
The invention provides an board integrated wireless power transmission device and a coupling mechanism parameter design method thereof, and solves the technical problems that: how to keep the pick-up power at the required level when the vessel is displaced laterally, longitudinally or in combination.
In order to solve the technical problems, the invention provides an board integrated wireless power transmission device, which comprises an energy pickup module fixed on the back of a ship board and an energy emission module fixed on a shore base;
the energy transmitting module is provided with a shore-based transmitting coil and an automatic adjusting mechanism for adjusting the horizontal position of the shore-based transmitting coil, and the shore-based transmitting coil is in a long track shape along the edge direction of the shore base;
the energy pickup module is provided with a shipborne receiving coil, and an alignment mechanism and a distance measuring sensor which are arranged in the center of the shipborne receiving coil;
the alignment mechanism is used for aligning the automatic adjusting mechanism when the ship board is laid down on the shore base so as to adjust the shore-based transmitting coil to move from the initial position to the position aligned with the center of the ship-mounted receiving coil along the direction parallel to the edge of the shore base; the distance measuring sensor is used for measuring a distance d from the shipborne receiving coil to the shore-based ground, and calculating a distance h between the shore-based transmitting coil and the shore-based edge after the shore-based transmitting coil moves in a direction perpendicular to the shore-based edge according to the distance d, so that the automatic adjusting mechanism obtains the distance h and adjusts the shore-based transmitting coil to move to a position away from the shore-based edge by the distance h, and the center of the shore-based transmitting coil is aligned to the center of the shipborne receiving coil.
Preferably, the first and second liquid crystal materials are,
wherein L represents the length of the ship board, L1Indicating the distance of the center of the on-board receiver coil from the near ship end and Q the distance of the end of the ship board from the shore-based edge.
Preferably, the energy emission module further comprises an emission end magnetic core arranged in a level with the shore-based emission coil, and the emission magnetic core and the shore-based emission coil have the same shape.
Preferably, the energy pickup module comprises a receiving end magnetic core and a magnetic shielding plate, wherein the receiving end magnetic core and the receiving end magnetic core are arranged in a layer manner, and the receiving end magnetic core are identical in shape.
Preferably, the magnetic shielding plate is the same width as the shipborne receiving coil and the same length as the shore-based transmitting coil.
Preferably, the shore-based transmitting coil and the shipborne receiving coil both adopt D-type coils.
Preferably, the on-board receiver coil is shorter and narrower than the shore-based transmitter coil.
The board integrated wireless power transmission device integrates the shipborne energy pickup module on the back of the board, and correspondingly, the energy emission module is horizontally placed on the shore-based ground. The shore-based transmitting coil is designed to be a long rectangle to increase the fore-aft offset adaptability of the ship traveling direction. The on-board receiver coil is designed to be shorter and narrower than the shore-based transmitter coil to ensure angular offset compliance. When a ship drives into a charging area and stops beside a shore base, the board is unfolded to the shore base ground, the automatic adjusting mechanism on the shore base ground is matched with the aligning mechanism at the center of the shipborne receiving coil and the distance measuring sensor, so that the shore base transmitting coil is automatically aligned above the shipborne receiving coil, the electric energy supply is realized while the ship stops on the shore, the possible three-dimensional space omnidirectional deviation of the electromagnetic coupling mechanism is converted into the deviation and the angle deviation in the front and back directions of the ship, the deviation resistance is easy to realize, the pickup power can be kept at the required level, the reliability and the convenience of the wireless electric energy supply when the ship stops on the shore are realized, and the influence of various deviations of the ship on seawater on a wireless energy transmission system is solved.
The invention also provides a parameter design method of a coupling mechanism of the board integrated wireless power transmission device, wherein the coupling mechanism comprises a shore-based transmitting coil and a ship-borne receiving coil, and the method comprises the following steps:
s1, determining the working frequency, the input voltage, the output current and the transmission distance of the coupling mechanism of the system;
s2, designing the shape and size of the ship-borne receiving coil according to the system power level;
s3, traversing and optimizing the influence of the length of the shore-based transmitting coil on the fore-and-aft offset of the ship-borne receiving coil;
s4, determining the length of the shore-based transmitting coil according to the influence of the length of the shore-based transmitting coil on the fore-and-aft offset of the ship-borne receiving coil;
s5, traversing and optimizing the influence of the width of the shore-based transmitting coil on the angle deviation of the shipborne receiving coil;
and S6, determining the width of the shore-based transmitting coil according to the influence of the width of the shore-based transmitting coil on the angle deviation of the ship-borne receiving coil.
Further, in the step S4, the determined influence of the length of the shore-based transmitting coil on the fore-aft offset of the onboard receiving coil is: the mutual inductance fluctuation rate is within +/-3% within the range from front deviation of 50cm to back deviation of 50 cm.
Further, in the step S6, the determined influence of the width of the shore-based transmitting coil on the angle offset of the shipborne receiving coil is as follows: the mutual inductance fluctuation rate is within +/-3% within the variation range of the offset angle alpha from 0 DEG to 15 deg.
According to the coupling mechanism parameter design method, a shore-based transmitting coil and a ship-borne receiving coil of a magnetic coupling mechanism are designed and optimized, the size of the ship-borne receiving coil is determined firstly, then the size of the shore-based transmitting coil is determined through simulation according to the size of the ship-borne receiving coil, the mutual inductance of the obtained coupling mechanism is stable within the range of front and back deviation of 50cm, and the fluctuation rate is within +/-3%. The mutual inductance is stable in the variation range of the offset angle alpha from 0 degree to 15 degrees, the fluctuation rate is within +/-3 percent, and good front-back offset resistance and angle offset resistance are realized.
Drawings
Fig. 1 is a side view of an board integrated wireless power transfer device provided by an embodiment of the present invention;
fig. 2 is a top view of an board integrated wireless power transfer device provided by an embodiment of the present invention;
FIG. 3 is a schematic diagram of calculating a distance h according to an embodiment of the present invention;
FIG. 4 is a schematic view of a coupling mechanism provided by an embodiment of the present invention;
FIG. 5 is a flow chart of a parameter design of a coupling mechanism provided by an embodiment of the present invention;
FIG. 6 is a graph comparing the angular offset performance of different widths of transmitter coils provided by embodiments of the present invention;
fig. 7 is a graph comparing the forward and backward offset performance of transmitter coils of different lengths according to an embodiment of the present invention.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, which are given solely for the purpose of illustration and are not to be construed as limitations of the invention, including the drawings which are incorporated herein by reference and for illustration only and are not to be construed as limitations of the invention, since many variations thereof are possible without departing from the spirit and scope of the invention.
In order to achieve reliability and convenience of wireless power supply when a ship is landed and solve the problem of influence of various offsets of the ship on seawater on a wireless power transmission system, an embodiment of the invention provides an board integrated wireless power transmission device, which comprises an energy pickup module fixed on the back surface of a ship board and an energy emission module fixed on a shore base, as shown in a side view of fig. 1 and a top view of fig. 2. The energy transmitting module is provided with a shore-based transmitting coil (or a transmitting coil for short) and an automatic adjusting mechanism for adjusting the horizontal position of the shore-based transmitting coil, and the energy picking module is provided with a ship-borne receiving coil (or a receiving coil for short) and an aligning mechanism and a distance measuring sensor which are arranged in the center of the ship-borne receiving coil. The shore-based transmitting coil is in a long track type along the direction of the edge of the shore base.
The alignment mechanism is used to provide an automatic adjustment mechanism (e.g., a slide) to adjust the shore-based transmitter coil to move from an initial position in a direction parallel to the shore-based edges to a position aligned with the center of the onboard receiver coil when the ship board is lowered onto the shore-based.
The distance measuring sensor is used for measuring the distance d between the shipborne receiving coil and the shore-based ground, calculating the distance h between the shore-based transmitting coil and the shore-based edge after the shore-based transmitting coil moves along the direction vertical to the shore-based edge according to the distance d, and supplying an automatic adjusting mechanism to obtain the distance h so as to adjust the shore-based transmitting coil to move to the position away from the shore-based edge by the distance h, so that the center of the shore-based transmitting coil is aligned to the center of the shipborne receiving coil.
The principle of adjusting the shore-based transmitter coil according to the detected distance is shown in fig. 3, where L represents the length of the ship board and L1Representing the distance of the center of the on-board receiver coil from the near-ship end, and Q representing the distance of the end of the ship board from the shore-based edge, then
It can be seen that the shore-based transmitting coil and the shipborne receiving coil both adopt D-shaped coils. The D-type coil has the advantages of simple winding, easiness in laying, stable structure and the like.
As shown in fig. 4, the energy transmitting module further includes a transmitting end magnetic core arranged in a level with the shore-based transmitting coil, and the transmitting magnetic core and the shore-based transmitting coil have the same shape. The energy pickup module comprises a receiving end magnetic core and a magnetic shielding plate (adopting an aluminum plate), wherein the receiving end magnetic core and the ship-borne receiving coil are arranged in a layered mode, and the receiving end magnetic core and the ship-borne receiving coil are the same in shape. The magnetic shielding plate has the same width as the shipborne receiving coil and the same length as the shore-based transmitting coil so as to shield the influence of the shore-based transmitting coil on the receiving circuit.
According to the board integrated wireless power transmission device provided by the embodiment of the invention, the shipborne energy pickup module is integrated on the back of the board, and correspondingly, the energy emission module is horizontally placed on the shore-based ground. The shore-based transmitting coil is designed to be a long rectangle to increase the fore-aft offset adaptability of the ship traveling direction. The on-board receiver coil is designed to be wider and shorter than the shore-based transmitter coil to ensure angular offset compliance. When a ship drives into a charging area and stops beside a shore base, the board is unfolded to the shore base ground, the automatic adjusting mechanism on the shore base ground is matched with the aligning mechanism at the center of the shipborne receiving coil and the distance measuring sensor, so that the shore base transmitting coil is automatically aligned above the shipborne receiving coil, the electric energy supply is realized while the ship stops on the shore, the possible three-dimensional space omnidirectional deviation of the electromagnetic coupling mechanism is converted into the deviation and the angle deviation in the front and back directions of the ship, the deviation resistance is easy to realize, the pickup power can be kept at the required level, the reliability and the convenience of the wireless electric energy supply when the ship stops on the shore are realized, and the influence of various deviations of the ship on seawater on a wireless energy transmission system is solved.
Based on the board integrated wireless power transmission device, in order to realize good forward and backward offset performance and angle offset performance, the embodiment also provides a parameter design method of a coupling mechanism, wherein the coupling mechanism comprises a shore-based transmitting coil and a shipborne receiving coil. As shown in the flow chart of fig. 5, the method includes the steps of:
s1, determining the working frequency, the input voltage, the output current and the transmission distance of the coupling mechanism of the system;
s2, designing the shape and size of the ship-borne receiving coil according to the system power level;
s3, traversing and optimizing the influence of the length of the shore-based transmitting coil on the fore-and-aft offset of the ship-borne receiving coil (by using finite element analysis software MAXWELL);
s4, determining the length of the shore-based transmitting coil according to the influence of the length of the shore-based transmitting coil on the fore-and-aft offset of the ship-borne receiving coil;
s5, optimizing the influence of the width of the shore-based transmit coil on the angular offset of the shipborne receive coil (using finite element analysis software MAXWELL) in a traversal manner;
and S6, determining the width of the shore-based transmitting coil according to the influence of the width of the shore-based transmitting coil on the angle deviation of the ship-borne receiving coil.
Typically, the on-board receiver coil is shorter and narrower than the shore-based transmitter coil.
More specifically, in step S4, the determined influence of the length of the shore-based transmit coil on the fore-aft offset of the onboard receive coil is: the mutual inductance fluctuation rate is within +/-3% within the range from front deviation of 50cm to back deviation of 50 cm. In step S6, the determined effect of the width of the shore-based transmit coil on the onboard receive coil angular offset is: the mutual inductance fluctuation rate is within +/-3% within the variation range of the offset angle alpha from 0 DEG to 15 deg.
For example, the system operating frequency is 85kHz, the input voltage is 750V, the output voltage is 600V, the output current is 100A, and the transmission distance is designed to be 20 cm. The on-board receiver coil was sized "600 mm 500mm 5 mm" and 9 turns, depending on the power rating. The model of the board-integrated wireless power transmission coupling mechanism built in MAXWELL is shown in fig. 4.
The angular offset performance for different widths of shore-based transmit coils is shown in fig. 6, with a length of 150cm unchanged. The result shows that when the width of the shore-based transmitting coil is 70cm, the mutual inductance of the coupling mechanism is stable in the variation range of the offset angle alpha from 0 degrees to 15 degrees, and the fluctuation rate is within +/-3 percent.
Under the condition that the width is 70cm, the front-back offset performance corresponding to the shore-based transmitting coils with different lengths is shown in figure 7. The result shows that when the length of the shore-based transmitting coil is 150cm, the mutual inductance of the coupling mechanism is stable within the range of 50cm of front offset to 50cm of back offset, and the fluctuation rate is within +/-3%.
Finally, the shore-based transmit coil size was "1500 mm x 700mm x 5 mm" and the number of turns was 5. The on-board receiver coil was designed with dimensions "600 mm by 500mm by 5 mm" and a number of turns of 9.
The parameter design method of the coupling mechanism comprises the steps of firstly determining the size of a ship-borne receiving coil, then determining the size of a shore-based transmitting coil through simulation according to the size of the ship-borne receiving coil, and enabling the obtained coupling mechanism to have stable mutual inductance within the range of being deviated from the front and back by 50cm and the fluctuation rate to be within +/-3%. The mutual inductance is stable in the variation range of the offset angle alpha from 0 degree to 15 degrees, the fluctuation rate is within +/-3 percent, and good front-back offset resistance and angle offset resistance are realized.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. board integral type wireless power transmission device, its characterized in that: comprises an energy pickup module fixed on the back of a ship board and an energy emission module fixed on a shore base;
the energy transmitting module is provided with a shore-based transmitting coil and an automatic adjusting mechanism for adjusting the horizontal position of the shore-based transmitting coil, and the shore-based transmitting coil is in a long track shape along the edge direction of the shore base;
the energy pickup module is provided with a shipborne receiving coil, and an alignment mechanism and a distance measuring sensor which are arranged in the center of the shipborne receiving coil;
the alignment mechanism is used for aligning the automatic adjusting mechanism when the ship board is laid down on the shore base so as to adjust the shore-based transmitting coil to move from the initial position to the position aligned with the center of the ship-mounted receiving coil along the direction parallel to the edge of the shore base; the distance measuring sensor is used for measuring a distance d from the shipborne receiving coil to the shore-based ground, and calculating a distance h between the shore-based transmitting coil and the shore-based edge after the shore-based transmitting coil moves in a direction perpendicular to the shore-based edge according to the distance d, so that the automatic adjusting mechanism obtains the distance h and adjusts the shore-based transmitting coil to move to a position away from the shore-based edge by the distance h, and the center of the shore-based transmitting coil is aligned to the center of the shipborne receiving coil.
2. The board integral type wireless power transfer device of claim 1, wherein:
wherein L represents the length of the ship board, L1Indicating the distance of the center of the on-board receiver coil from the near ship end and Q the distance of the end of the ship board from the shore-based edge.
3. The board integral type wireless power transfer device of claim 2, wherein: the energy transmitting module further comprises a transmitting end magnetic core which is arranged in a shore-based transmitting coil layer, and the transmitting magnetic core is the same as the shore-based transmitting coil in shape.
4. Board-integrated wireless power transfer device of claim 3, wherein: the energy pickup module comprises a receiving end magnetic core and a magnetic shielding plate, wherein the receiving end magnetic core and the magnetic shielding plate are arranged in a ship-borne receiving coil layer, and the receiving end magnetic core and the ship-borne receiving coil are the same in shape.
5. The board integral type wireless power transfer device of claim 4, wherein: the magnetic shielding plate is as wide as the shipborne receiving coil and as long as the shore-based transmitting coil.
6. The board integral type wireless power transfer device of claim 1, wherein: and the shore-based transmitting coil and the shipborne receiving coil both adopt D-shaped coils.
7. The board integral type wireless power transfer device of claim 1, wherein: the on-board receiver coil is shorter and narrower than the shore-based transmitter coil.
8. method for designing parameters of coupling mechanism of wireless power transmission device integrated with board, the coupling mechanism comprises shore-based transmitting coil and ship-borne receiving coil as claimed in any claim 1-7, the method comprises the steps of:
s1, determining the working frequency, the input voltage, the output current and the transmission distance of the coupling mechanism of the system;
s2, designing the shape and size of the ship-borne receiving coil according to the system power level;
s3, traversing and optimizing the influence of the length of the shore-based transmitting coil on the fore-and-aft offset of the ship-borne receiving coil;
s4, determining the length of the shore-based transmitting coil according to the influence of the length of the shore-based transmitting coil on the fore-and-aft offset of the ship-borne receiving coil;
s5, traversing and optimizing the influence of the width of the shore-based transmitting coil on the angle deviation of the shipborne receiving coil;
and S6, determining the width of the shore-based transmitting coil according to the influence of the width of the shore-based transmitting coil on the angle deviation of the ship-borne receiving coil.
9. The method for designing parameters of a coupling mechanism of a board-integrated wireless power transmission device, in the step S4, the determined influence of the length of the shore-based transmitting coil on the fore-aft offset of the shipborne receiving coil is: the mutual inductance fluctuation rate is within +/-3% within the range from front deviation of 50cm to back deviation of 50 cm.
10. The method for designing parameters of a coupling mechanism of a board-integrated wireless power transmission device, in the step S6, the determined influence of the width of the shore-based transmitting coil on the angle offset of the shipborne receiving coil is: the mutual inductance fluctuation rate is within +/-3% within the variation range of the offset angle alpha from 0 DEG to 15 deg.
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