Method and device for determining a correction for an energy measurement in an inductive charging system

Abstract

The invention relates to a method for determining a correction value in a primary-side charging plate (105) during the measurement of energy for a secondary charging plate (104), the method comprising the steps of: selecting at least one component (601, 602, 603) that has an error or loss in the primary-side charging plate (105), wherein the at least one component (601, 602, 603) that has an error or loss is influenced by at least one error or loss selected from the group of errors consisting of a measurement error (P GA,err ) with respect to a comparison value, an intrinsic loss (P intr <sb / >) and a measurement loss (P MVA,err ) of the secondary charging plate; determining an overall correction factor of the respective measurement errors or losses of the at least one component that has an error or loss; determining an overall correction factor and writing the overall correction factor as a correction value to a storage unit (705) of the primary-side charging plate (105).

Description

[0001] Method and device for determining a correction for an energy measurement in an inductive charging system Field of the invention The invention relates to the technical field of inductive charging. In particular, the present invention relates to methods for determining a measurement error, a compensation device for determining a measurement error, a method for error-corrected measurement of energy provided for a secondary-side charging plate, a primary-side charging plate for error-corrected measurement of the energy provided for a secondary-side charging plate, and a measuring probe for magnetic field measurement. Background of the invention For the electrical charging of a purely electric vehicle (EV, Electric Vehicle) or a hybrid vehicle (PHEV, Plug-in Hybrid-Electric Vehicle) which is operated with a combination of fuel and electrical energy, a system for inductive energy transfer can be used if the charging is to be contactless.In such a system, an alternating magnetic field in the frequency range of 25…150 kHz is generated. It should be noted that outside this frequency band, the limits for the emission of electromagnetic waves are defined by internationally applicable standards. Although a magnetic field is essentially used to transmit energy, the fact that the magnetic field changes means that it is inherently an electromagnetic wave. Due to the frequency of the alternating magnetic field, the electromagnetic wave used in inductive charging has a wavelength of several kilometers. The coupling element for energy transfer is a primary-side charging plate (Ground Assembly, GA) with a primary coil on the stationary side and a secondary-side charging plate (Vehicle Assembly, VA) with a secondary coil on the vehicle side. GA and VA form a transformer for coupling and energy transfer.The physical alignment of the coupling elements to one another is measured and adjusted, for example, using a positioning signal. Different transmission technologies with different frequencies are used for energy transmission and the transmission of the positioning signal. For example, inductive charging systems use GA and VA to charge the battery of an electric vehicle with electrical energy while it is parked. The primary side of the inductive charging system is usually the side operated by a power company. During charging, electrical energy on the primary side is converted into an alternating magnetic field and transferred to the secondary side. The secondary side is usually the consumer side, in particular the customer of the power company. On the secondary side, the alternating magnetic field is converted back into electrical energy in the form of direct current to charge the vehicle battery.However, if the inductive charging system is operated as a charging station in a public space and the customer consequently purchases and pays for the supplied energy from the charging station operator, in particular the energy supplier, then legal requirements exist according to which the measurement of the supplied electrical energy must be carried out using a calibrated device. For example, in Europe, there is the EU Directive 2014 / 32 / EU, abbreviated to the "Measurement Instrument Directive" (MID). It is implemented into German law through the Measurement and Calibration Act (MessEG) and the Measurement and Calibration Ordinance (MessEV). European and German calibration law defines requirements for the calibration of measuring instruments. These requirements are essentially defined as requirements regarding error limits, reproducibility, repeatability, response threshold and sensitivity, durability, reliability, and suitability.The objective of these requirements is to protect consumers from inaccurate measurements. This also includes ensuring that the person responsible for power losses, such as the energy consumer, is correctly attributed their consumption. This is intended to guarantee correct billing and accurate payment for the amount of energy generated by the consumer. One objective of the present invention may be considered to enable the effective determination of energy quantities.Summary of the Invention Accordingly, a method for determining a correction value, a correction, and / or a measurement error, a compensation device for determining a correction value and / or a measurement error, a method for error-corrected and / or calibrated measurement of energy provided to a secondary-side charging plate, a primary-side charging plate for error-corrected and / or calibrated measurement of the energy provided to a secondary-side charging plate, and a measuring probe for magnetic field measurement are provided. The subject matter of the invention is defined by the features of the independent claims. Embodiments and further aspects of the invention are defined by the dependent claims and the following description.According to one aspect of the present invention, a method is provided for determining a correction value, a correction, and / or measurement error for an energy measurement in a primary-side charging plate when providing energy to a secondary charging plate. The method comprises selecting at least one component to be corrected and / or a faulty component in the primary-side charging plate, wherein the at least one component to be corrected and / or a faulty component is influenced by at least one disturbance factor and / or an error selected from the group of disturbance factors consisting of a measurement error compared to a comparison value, an intrinsic partial measurement error and / or intrinsic partial loss, an intrinsic measurement error and / or intrinsic loss, and a feedback measurement error and / or feedback measurement loss from the secondary charging plate.The method further comprises determining a total disturbance factor of the respective disturbance factors of the at least one component to be corrected and / or the at least one faulty component, determining the correction value from the total disturbance factor and / or the total measurement error, and writing the total disturbance factor as a correction value into a memory device of the primary-side charging plate. The method can be used as a method for calibrating and / or verifying an integrated electricity meter in an inductive charging system. The integrated electricity meter may be implemented using sensors and / or measuring points built into the inductive charging system.Using calibrated reference measuring devices, deviations from, for example, measurements in the primary-side charging plate and / or the secondary-side charging plate can be determined compared to standardized comparison values ​​and thus taken into account as correction values ​​in future measurements in order to compensate for corresponding errors. According to one aspect, a technical possibility for measuring the amount of energy transferred may be described which can meet the requirements of European and German calibration law. According to another aspect of the present invention, the correction value forms a correction characteristic. The correction values ​​can be individual values ​​or form a correction characteristic or a compensation characteristic over a predeterminable range. The individual values ​​and / or the correction characteristic can be represented and provided, for example, as a first-order polynomial or as conversion tables.The correction and / or the correction values ​​may comprise quantities that are added together to form a total value. The correction may comprise a constant, but may also be a characteristic curve (2D table) and / or even a characteristic map (3D table). According to another aspect of the present invention, the at least one disturbance factor is determined by an input power measurement at the primary charging plate. In one example, the input power measurement may be determined using a calibrated power meter at the primary charging plate. The correction value can be determined from the at least one disturbance factor. In general, the primary charging plate may have a plurality of built-in sensors. These may already be present in a primary charging plate for various measuring tasks, and the built-in sensors may essentially all be used to determine corresponding measured values.However, the installation location of the sensors may have been chosen so that they are useful for the operation of the primary charging plate and are technically and / or economically feasible. However, the installation location may not coincide with the measurement location for energy to be delivered to a customer. In other words, sensors may be present in the primary charging plate, but not installed in such a way that they are located where a measurement would have to be taken for energy to be delivered to a customer. Nevertheless, by combining different measurements and / or determining correction values, it may be possible to use existing sensors in a primary charging plate for billing the amount of energy supplied. This additional use may prevent the installation of additional sensors.According to a further aspect of the present invention, the at least one disturbance factor is determined by a magnetic field measurement in a magnetic field generated by the primary charging plate. The magnetic field can be viewed as a transition point in the amount of energy supplied to a consumer. However, it may be difficult to perform measurements at this transition point during operation at an economically and technically justifiable cost. Furthermore, the consumer's behavior, for example, by inaccurately positioning their vehicle over a primary charging plate, may contribute to the losses, which are attributable to them and not to the supplying energy company.By means of a magnetic field measurement conducted during and / or after production in a magnetic field generated by the primary charging plate, it may be possible to determine which portion of the energy provided is attributable to the energy supplier and thus to the primary charging plate, and which portion is attributable to the consumer and thus to the secondary charging plate. According to yet another aspect of the present invention, a compensation device for determining a correction value for an energy measurement in a primary-side charging plate and for writing the correction value to the primary-side charging plate is provided. This compensation device comprises a selection device, an evaluation device, and a writing device.The selection device is configured to select at least one faulty component and / or component to be corrected in the primary-side charging plate, wherein the at least one faulty component and / or the component to be corrected is influenced by at least one disturbance factor, for example, an error and / or a loss. The disturbance factor may be selected from the group of errors consisting of a measurement error compared to a reference value, an intrinsic partial loss and / or intrinsic partial measurement error, an intrinsic loss and / or an intrinsic measurement error, a measurement loss from the secondary charging plate, and / or a feedback measurement error from the secondary charging plate. The type of error in a measurement with built-in sensors can be determined, for example, by a comparison with standardized and / or calibrated high-quality measuring devices.The evaluation device is configured to determine a total disturbance factor of the respective disturbance factors of the at least one faulty component and / or component to be corrected. Furthermore, the evaluation device is configured to determine the correction value from the total disturbance factor. The writing device is configured to write the total disturbance factor as a correction value into a memory device of the primary-side charging plate. For this purpose, the primary-side storage device can have an interface via which the compensation device and the primary-side charging plate can exchange data. In this way, errors that the built-in sensors in the primary-side charging plate have due to their misuse as energy measurement sensors can be compensated for, and the primary-side charging plate can be adapted to provide energy measurement values.According to another aspect of the present invention, a method for calibrated measurement and / or error-corrected measurement of the energy provided to a secondary-side charging plate in a primary-side charging plate is described. The method provides for determining an input power at the primary-side charging plate and reading a correction value from a memory device of the primary-side charging plate, wherein the correction value corrects at least one disturbance factor of at least one faulty component of the primary-side charging plate. The disturbance factor is selected from the group of disturbance factors consisting of a measurement error compared to a reference value, an intrinsic partial loss, an intrinsic loss, and a feedback measurement loss from the secondary charging plate. Furthermore, the method comprises providing a calibrated, an error-corrected, and / or calibrated measured value.Thus, a charging infrastructure, for example a primary-side charging plate, can be expanded for billing the energy provided by utilizing sensors already used for other purposes. According to another aspect of the present invention, a primary-side charging plate is described for calibrated measurement of the energy provided to a secondary-side charging plate. The primary-side charging plate has an input power measuring device, a correction device, and a memory device, wherein the input power measuring device is configured to determine an input power at the primary-side charging plate. The correction device is configured to read a correction value from the memory device of the primary-side charging plate. The correction value corrects at least one disturbance factor of at least one component of the primary-side charging plate to be corrected.The interference factor is selected from the group of interference factors consisting of a measurement error compared to a reference value, an intrinsic partial loss, an intrinsic loss, a measurement loss from the secondary charging plate, in particular a measurement loss caused by the secondary charging plate, for example due to feedback from the secondary coil to the primary coil. In addition, the correction device is designed to provide a calibrated measured value and / or an error-corrected measured value. The terms “error-corrected measurement” or “calibrated measurement” may mean that measurement errors are balanced out or compensated for by correction values ​​within a predefinable tolerance limit. The correction values ​​can be individually determined and saved for each primary-side charging plate after production of the primary-side charging plate, i.e. at the “end of the line”.Furthermore, it is possible for the correction values ​​to be determined for a production batch and saved in the devices of that batch. Correction values ​​can also be determined once for the entire production run and saved in all devices. The error-corrected measured value may be very close to the actual amount of energy provided, in particular the actual amount of energy transferred. A correction value may be determined from a determined total disturbance factor. The process of determining the correction values ​​and loading them onto the primary-side load plate is referred to as calibration. A primary load plate provided with correction values, to which the correction values ​​have been loaded and the corresponding corrections have been made, is referred to as calibrated.Unlike calibration, calibration may, according to the legal definition, only be performed by calibration authorities and therefore cannot be performed by a device manufacturer. Calibration essentially involves the manufacturer's adjustment of the measuring device. Verification, on the other hand, essentially involves official confirmation by a calibration authority that the measuring device complies with legal requirements. The measurement and storage of correction values ​​at the end of the production line may therefore be referred to as "calibration" to distinguish official, officially performed calibration from the process of compensating for interference factors at the end of the line. In other words, calibration at the end of the line may ensure that the measured values ​​​​determined by sensors in the inductive energy transmission system agree with calibrated measured values ​​within legally permitted tolerance limits.In one example, the input power measuring device may be a power measuring sensor that is installed in a power input of the primary-side charging plate and fulfills additional functions besides power measurement for billing the amount of energy provided. According to a further aspect of the present invention, a measuring probe for magnetic field measurement is provided, comprising a coil, a coil holding device, and a coil positioning device. The coil holding device is configured to hold the coil in a magnetic field, wherein the coil positioning device is configured to position the coil of the measuring probe over the coil of the primary-side charging plate such that they experience the greatest possible coupling to one another, and in particular the maximum achievable coupling.The measuring probe may enable standardized comparison measurements to be carried out under identical conditions for the load, i.e., for the secondary-side charging plate. The coil positioning device may ensure that the coil is arranged at substantially the same position of maximum coupling for each comparison measurement of different primary-side charging plates. Standard ambient conditions may thus be created when determining correction values ​​and when calibrating a primary-side charging plate. According to a further aspect of the present invention, the coil positioning device further comprises a locking element, wherein the locking element is configured to lock into the housing of a primary-side charging plate in order to bring about the large or strong coupling with the primary-side coil.The locking element may essentially ensure a defined positioning in order to achieve the greatest possible coupling. The greatest possible coupling is achieved when the greatest possible magnetic coupling factor can be determined between the primary-side charging plate and the secondary-side charging plate. The locking element can determine the alignment of the measuring probe with the coil relative to the primary-side charging plate. According to another aspect of the present invention, the coil holding device is designed as a table. The table shape allows a substantially parallel alignment of the measuring probe coil to the primary-side charging plate and in particular to a primary coil installed in the primary-side charging plate. According to yet another aspect of the present invention, a computer-readable storage medium is provided on which program code is stored which, when executed by a processor, carries out at least one of the methods.A floppy disk, a hard disk, a USB (Universal Serial Bus) storage device, a RAM (Random Access Memory), a ROM (Read Only Memory), or an EPROM (Erasable Programmable Read Only Memory) may be used as a computer-readable storage medium. An ASIC (application-specific integrated circuit) or an FPGA (field-programmable gate array), as well as SSD (Solid State Drive) technology or a flash-based storage medium, may also be used as the storage medium. According to yet another aspect of the present invention, a program element is provided which, when executed by a processor, carries out at least one of the methods. Brief Description of the Figures Further exemplary embodiments of the present invention are described below with reference to the figures. Fig. 1 shows an inductive charging system according to an exemplary embodiment of the present invention. Fig.2 shows a perspective rear view of a measuring probe for a magnetic field measurement according to an exemplary embodiment of the present invention. Fig. 3 shows a perspective front view of a measuring probe for a magnetic field measurement according to an exemplary embodiment of the present invention. Fig. 4 shows a further perspective front view of a measuring probe for a magnetic field measurement according to an exemplary embodiment of the present invention. Fig. 5 shows a detailed view from the perspective front view of Fig. 3 of a measuring probe for a magnetic field measurement according to an exemplary embodiment of the present invention. Fig. 6 shows a schematic block diagram of the losses occurring on the primary and secondary side of an inductive charging system according to an exemplary embodiment of the present invention.7 shows an arrangement for calibrating the input power measurement of a GA according to an exemplary embodiment of the present invention. Fig. 8 shows an arrangement for calibrating the losses of the GA without the PFC filter according to an exemplary embodiment of the present invention. Fig. 9 shows an arrangement for calibrating the intrinsic losses of the GA according to an exemplary embodiment of the present invention. Fig. 10 shows an arrangement for fully calibrating a power measurement in a GA according to an exemplary embodiment of the present invention. Fig. 11 shows a flowchart for methods for determining a measurement error in a primary-side load plate when providing energy to a secondary load plate according to an exemplary embodiment of the present invention. Fig.12 shows a flowchart for methods for error-corrected measurement of the energy provided for a secondary-side charging plate 104 in a primary-side charging plate 105 according to an exemplary embodiment of the present invention. Detailed Description of Embodiments The representations in the figures are schematic and not to scale. In the following description of FIGS. 1 to 12, the same reference numerals are used for identical or corresponding elements. In this text, the terms "capacitor" and "capacitance" as well as "coil" or "choke" and "inductance" may be used interchangeably and, unless otherwise stated, should not be interpreted in a restrictive manner. Furthermore, the terms "energy" and "power" may be used interchangeably and, unless otherwise stated, should not be interpreted in a restrictive manner. Power can be converted into energy and vice versa. Fig.1 shows an inductive charging system 100 or system 100 for energy transfer according to an exemplary embodiment of the present invention. This shows a side view of a system for contactless charging of an electric vehicle. Located beneath a vehicle chassis 102 is a vehicle assembly (VA) 104 or a car pad module (CPM) 104, which serves to supply the vehicle 102 with power. A magnetic field 106 is used to transfer the power, which is inductively provided by a ground assembly (GA) 105 or a ground pad module (GPM) 105 fixedly mounted on a floor 103. The power required for charging is taken from the main connection 107, which can be either alternating current (AC) or direct current (DC). For communication between VA 104 and GA 105, a separate connection 101 is used, which can use a radio protocol such as WLAN (Wireless LAN), UWB (Ultra-Wideband) or NFC.This connection can be used as a feedback channel 101 or as a communication channel 101 via which VA 104 and GA 105 can exchange information. Both the magnetic field for energy transmission 106 and the radio signal 101 are electromagnetic waves, but they have different frequencies. Figure 2 shows a perspective rear view of a measuring probe 104' for a magnetic field measurement according to an exemplary embodiment of the present invention. The measuring probe 104' or MVA 104' is arranged above the GA 105 and is table-shaped. The measuring probe 104' has a coil 202 and a coil holding device 201. The coil holding device 201 is table-shaped and has a coil positioning device 203 on the table legs.The coil holding device 201 is configured to hold the coil 202 in a magnetic field of the GA 105, wherein the coil positioning device 203 is configured to position the coil 202 such that the coil of the measuring probe experiences the greatest possible, in particular the maximum achievable, coupling with the coil of the primary-side charging plate. Even if the coil of the measuring probe is aligned essentially purely geometrically in relation to the coil of the primary-side charging plate such that the greatest possible coupling is achieved between the two coils, the coupling essentially only occurs at the moment the magnetic field is switched on. The coil is connected to a measuring device box 204 or load 204, in which the energy is stored or dissipated.Likewise, calibrated measuring devices for performing power and / or energy measurements are also connected to the connection point where the load 204 is connected to the coil. In particular, comparative measurements can be performed using calibrated measuring devices. The compensation device 706 can be connected to the measuring device box 204 and / or to the connection point between the coil and the measuring device box (the compensation device 706 is not shown in Fig. 2). The measuring probe 104' is used as a standardized secondary-side measuring system 104', which essentially replicates the functionality of the VA 104 under essentially standardized conditions. Fig. 3 shows a perspective front view of a measuring probe 104' for a magnetic field measurement according to an exemplary embodiment of the present invention.In this view, the locking elements 203 can be seen, which essentially ensure that the coil 202 is positioned the same way relative to the GA 105 for each measurement. Fig. 4 shows a further perspective front view of a measuring probe 104' for a magnetic field measurement according to an exemplary embodiment of the present invention. Fig. 5 shows a detailed view from the perspective front view of Fig. 3 of a measuring probe 104' for a magnetic field measurement according to an exemplary embodiment of the present invention. This shows how the locking element 203 is physically connected to the GA 105, for example by locking in, in order to establish a constant position of the coil 202 relative to the GA 105 when several GAs 105 are to be calibrated one after the other. The locking element 203 is at least partially adapted to the contour of the DA 105, in particular to the shape of a housing of a GA 105. As can be seen from Figs.As can be seen from Figures 2 to 5, a basic measurement setup for calibrating an inductive charging system 100' includes the primary-side charging plate 105 or GA 105, which is provided at the end of an ongoing production process. The measurement setup also includes the measuring probe 104' or the secondary-side measuring system 104' (Measurement Vehicle Assembly, MVA), which is used instead of a VA 104. The MVA 104' thus represents the secondary-side charging plate 104 (Vehicle Assembly, VA) that would be installed on the electric vehicle during operation.The measuring probe 104' can ensure consistent and / or standardized measuring conditions during calibration, whereas vehicle-specific VAs 104 would essentially always produce different measurement results. The different results can arise, for example, from the primary-side coil having a different geometric alignment to the VA coil, due to different coil designs, or due to different shielding or variances in the positioning relative to the primary-side charging plate. The MVA 104' is designed such that it measures the power transmitted by the GA 105 essentially without any feedback. The MVA 104' is implemented as a coil holding device 201, in particular as a Plexiglas table 201, with an embedded coil 202 and a connected load 204' (not shown in Figs. 2 to 5). The load 204' is adaptable and is accommodated, for example, in the measuring box 204.The load 204' has connections for measuring current and voltage by calibrated and / or standardized measuring devices 204'' (not shown in Figs. 2 to 5). The coil positioning device 203 of the MVA 104' is configured to position the coil 202 in a magnetic field generated by the GA 105 such that the coil 202 experiences maximum coupling with the magnetic field. For this purpose, the MVA 104' locks into the position of maximum possible magnetic coupling above the GA 105. In other words, the height of the coil holding device 201 and the alignment to a center position of the GA 105 are selected such that the magnetic field penetrating the coil 202 experiences essentially maximum magnetic coupling with the coil 202. The locking elements 203 can be used to align the center position and / or for horizontal alignment, which determine a distance between the coil holding device 201 and the GA 105.The power supplied to the MVA 104' via the magnetic field 106 from the GA 105 is measured using the calibrated power measuring devices 204'. Power losses and / or energy losses within the MVA 104' are measured, for example, as calorimetric heat and subtracted from the measured value of the calibrated measuring devices 204''. Determining losses via calorimetric heat is just one example of loss determination, particularly the determination of interference factors. Since the coil resistance is known, the power losses at the MVA can also be calculated alternatively. Thus, essentially all losses caused by the secondary side are excluded using this measuring arrangement. Although power losses of the MVA can be measured at the end of the strip, this requires a complex process.In one example, the power loss of the MVA may essentially only be calculated and then added as a constant to the measured power. Due to the design, the power transfer point and measurement point are not identical. While the power is measured at the input of the primary coil, the point of transfer of the power to the consumer is the magnetic field. However, since the losses and / or interference factors between the measurement point and transfer point are determined and corrected using this method, the transmitted power at the transfer point can be determined, i.e., the transmitted power in the magnetic field. At the MVA 104', the calibrated measuring devices 204'' can thus perform an essentially precise measurement of the transmitted power by the GA, which corresponds to a measurement directly in the alternating magnetic field 106. The calibration of each GA 105 is performed at the end of the production process, for example, in quality assurance.Calibration is therefore essentially the last step in production, i.e., the so-called "line decalibration." While the measurements are being performed, the GA is switched to a test mode which deactivates the diagnostic functions implemented in the GA 105 for functional safety during the calibration period. This test mode can be switched on and off by a compensation device 708. The load 204' at the output of the MVA 104' is set such that the nominal power range at the MVA is traversed for calibration. A nominal power range can, for example, cover a range from 9.1 kW to 11.1 kW. In other words, during calibration, deviations between the measured values ​​generated by the GA 105 in question and standardized measured values ​​are determined in order to be able to use these deviations, determined under ideal conditions, for correction during operation of the GA 105.During the measurements performed during the calibration phase, the input voltage at the GA 105 and the ambient temperature are kept constant. The input voltage can be kept constant by a regulated power supply. It can be assumed that the temperature remains constant during the measurement process. By keeping the input voltage at the main terminal 107 constant, the input current essentially changes when the power changes, and the input acts as a constant-voltage source. One goal of the calibration measurements and / or the calibration measurements may be to determine a correction curve, which is then stored in the GA 105. The correction curve is used to correct the measured power so that it corresponds to the calibrated power measurement at the MVA 104'.In other words, after applying the correction characteristic during actual operation, the power and / or energy provided by the GA 105 may not differ from that of the reference of the measuring probe 104'. For this purpose, for example, a display on the correction device 705' can be compared with the display of the measuring devices 204''. A GA 105 calibrated and / or calibrated in this way, i.e. a GA to which a correction characteristic is applied, can be sealed and labeled in accordance with the MessEV. It is then ready for operation in compliance with calibration law without further external intervention and can be used, among other things, for the public and legally compliant sale of energy. The MVA 104' can also be used by calibration offices to check the inductive charging system 100, in particular to check the GA 105 at the installation site.The test can be performed on-site without damaging the seal of the GA 105 or opening the GA 105, thus allowing the GA 105 to fulfill another requirement of the calibration law. The control measurement determines that the power and / or energy measured by the GA 105 is within the tolerance limit for measurement errors prescribed by the calibration law. For this purpose, for example, a reading on the correction device 705' can be compared with the reading on the measuring devices 204''. Annex V of the MID Directive specifies specific requirements specifically for the calibration of electricity meters. In Germany, for example, charging stations are assigned to meter class A and must not exceed a measurement error of ±3.5% under normal temperature conditions. These requirements were primarily formulated for energy consumption measurement at the connection point of wired electricity networks.The transfer point or transition point is the interface between the energy supplier and the energy consumer, at which the energy consumed is measured at the consumer's expense, for example, the meter in a house's electrical cabinet. However, with inductive charging of electric vehicles, there is no cable to which an energy meter can be attached at the transfer point. Instead, the transfer takes place in the magnetic field 106 in the air gap between the primary charging coil L1 and the secondary charging coil L2, or GA 105 and VA 104. However, cost-effective measurement of the transferred energy cannot be performed in the magnetic field. To comply with calibration law, measurements are therefore taken at a different location and the value is calculated in the magnetic field. Error-corrected measurement, as proposed by the subject matter of the present invention, helps to realize a technically and economically feasible, as well as legally sound, recording of the consumed energy.Because the measurement is not performed directly in the magnetic field, but rather using sensors in the GA 105, which are adjusted accordingly through calibration, a reliable result can be obtained within defined error tolerance limits. This avoids the need for direct measurement of the transmitted energy in a high-frequency, alternating magnetic field at 85 kHz, with an active power of 11 kW, and an apparent power of over 100 kVA. Measuring in such a strong magnetic field with the accuracy, reproducibility, and reliability required for consumption measurement would be too complex. By measuring within the GA 105, the use of complex laboratory measurement technology and laborious measurements under laboratory conditions can be avoided.The proposed primary-side charging plate 105 for error-corrected measurement eliminates the need for a complex measurement system that cannot be used to perform cost-effective energy measurements directly at the magnetic field. Since existing components are used to utilize a measurement sensor system 702, 703 already integrated into the primary-side charging plate 105, the proposed primary-side charging plate eliminates the need for the costly and complex integration of expensive precision measurement technology and / or laboratory measurement technology into an inductive charging station. Consequently, the proposed primary-side charging plate 105 allows for the creation of an energy distribution system for inductive charging that is both economical and structurally feasible for a charging station operator.Through the use of coupled coils, the secondary side and the way it is embedded in the vehicle, as well as the behavior of the consumer, have a significant influence on the consumption losses of the primary side 105. The invention makes it possible to carry out a calibrated energy measurement using an MVA, which is unaffected by losses that can be caused by a consumer. The difference between the output energy and the input energy is therefore the energy loss in the inductive charging system, which was only caused by the primary side, thus should not be charged to the consumer and must therefore be deducted from the energy measurement. Thus, the proposed solution may also bring the requirements of calibration law into conformity with an inductive charging system. Energy losses in the magnetic field 106 in active operation depend essentially on the accuracy of the parking position and the vehicle height in relation to the GA 105, e.g.influenced by the vehicle load. These factors are essentially influenced by the consumer. In the case of inaccurate positioning, i.e. an offset between primary coil L1 and secondary coil L2, as well as with greater vehicle height, the losses increase. A simultaneous reduction in magnetic coupling and a controlled increase in energy transfer on the primary side, which attempts to compensate for these losses, increases the losses in the power electronics on the primary side. The battery charge level of the electric vehicle, the charging power required by the vehicle, the size and shielding as well as the metallic environment of the secondary coil and the power electronics installed there also influence the losses on the primary side.These are factors influencing the energy losses on the primary side 105, which originate from the vehicle and the driver and thus, according to calibration law, must also be attributed to the driver and borne by him. By avoiding consumption measurements directly on the magnetic field, the unlawful allocation of these losses to the energy supplier is also avoided. Fig. 6 shows a schematic block diagram of the losses occurring on the primary side 105 and secondary side 104 of an inductive charging system according to an exemplary embodiment of the present invention. Fig. 6 shows the causes of the losses. The main causes of losses are three component groups 601, 602, 603 on the primary side 105 and the magnetic field 106 itself. In these three component groups 601, 602, 603 and in the magnetic field 106, interference factors arise, for example losses which are influenced by the consumer side.These losses should be charged to the consumer, not the energy supplier. The energy supplied by the GA 105 to the VA 104 is delivered via the grid connection 107. It passes through a PFC (Power Factor Correction) filter 601, which ensures that the alternating current (AC) supplied via the grid connection 107 behaves as much as possible like a resistive or ohmic resistor and contains as little reactive power as possible. After the PFC filter 601, the energy is supplied to an HVDC (High Voltage Direct Current) circuit 606 and then to the converter 602. This converter generates an AC voltage at 85 kHz from the AC voltage at the grid frequency, for example, 50 Hz or 60 Hz, i.e., at the frequency of the magnetic field 106 to be generated. Before the energy is fed into the primary coil L1, an impedance matching process takes place in the primary-side impedance matching network 603.The energy is transferred via primary circuit capacitors 607a to the primary coil L1, which generates the magnetic field 106. The magnetic field 106 penetrates the secondary coil L2, and thus the energy reaches the secondary side. From the secondary coil L2, the energy is transferred via the secondary capacitors 607b to the secondary-side impedance matching network 604. From there, the energy is transferred via the rectifier 605 to the secondary-side HVDC circuit, which then charges the vehicle battery (not shown in Fig. 6). Power losses occur in the individual components of the GA and VA. The causes of the power losses in the individual components can be determined by the driver or consumer, the vehicle type, and thus also by the consumer and the power company. Power losses of -2% to -5% can occur in the PFC filter 601.This power loss is influenced by the driver or consumer, as the driver determines the parking position, load, and battery charge level. The vehicle type influences the power loss in this component through the charging power required by the vehicle type and the vehicle type itself, for example the vehicle's characteristics, shape, and materials used. The energy supplier, for example the power utility, influences the power loss in this component 601 by selecting the design of the GA 105. The PFC filter 601 is an electronic circuit consisting of components and their connections on the PCB (Printed Circuit Board). Components and connecting lines have losses. These losses can be greater or smaller depending on their selection and design, i.e. the design of the GA 105.In addition, there are parasitic resistances, inductances, and capacitances, which also lead to losses. This may apply to all power electronics components. In the converter 602, -1.5% to -7% power loss can occur. This power loss is influenced by the driver or consumer, since the driver determines the parking position or load. The vehicle type influences the power loss occurring in this component, for example, through the vehicle's design, its shape, and the materials used. The energy supplier, for example the utility company, influences the power loss in this component 602 by selecting the design of the GA 105. In the primary-side impedance matching network 603, -0.5% to -4% power loss can occur.This power loss is influenced by the driver or consumer, as the driver determines the parking position, load, battery charge level, and selected charging power. The charging power is requested by the vehicle. This is generally dependent on the battery charge. If the battery is empty, the entire power is often requested, i.e. 100% power. If the battery is almost full, the power is generally gradually reduced to lower values. The vehicle type also influences the power loss occurring in this component through the vehicle type itself, for example through the vehicle design, its shape, and the materials used. The energy supplier, for example the energy provider, influences the power loss in this component 603 by selecting the design of the GA 105. In the magnetic field 106, -1.5% to -7% power loss can occur.This power loss is influenced by the driver or consumer, as the driver determines the parking position and load. The vehicle type itself influences the power loss in the magnetic field 106, for example, the vehicle's design, shape, and materials used, as well as the size of the secondary coil L2 installed in the vehicle type. Likewise, the VA design chosen by the vehicle manufacturer for the vehicle type, which may also be related to the coil size and / or the material used, can influence the magnetic field and its losses or interference factors. Since the driver usually selects the vehicle type, they are also responsible for the power losses generated by the vehicle. The energy supplier, for example the energy utility, influences the power loss in the magnetic field 106 by selecting the design of the GA 105.In the secondary-side impedance matching network 604, -0.5% to -4% power loss can occur. This power loss is influenced by the driver or consumer through the parking position, the load, and the battery state of charge. The vehicle type influences the power loss occurring in this component through the charging power required by the vehicle type. In the rectifier 605, -1% to -3% power loss can occur. This power loss is influenced by the driver or consumer through the battery state of charge. Knowledge of the power losses and the loss causes in GA and VA enables the method for determining a measurement error and the compensation device for determining a measurement error to select the at least one faulty component in the primary-side charging plate 105.In combination with the method for error-corrected measurement of the energy provided to a secondary-side charging plate 104 in a primary-side charging plate 105, a calibration-compliant method for measuring the energy transmitted by an inductive charging system 100 with a polluter-pays allocation of the losses occurring therein may be realized. The results of the method for determining a measurement error are used in the error-corrected measurement method. The exchange of information may occur by writing and / or reading a correction value to / from a memory device of the primary-side charging plate 105.One aspect of the present invention may be considered to be to perform a differential measurement at at least two measuring points along the energy transmission path using calibrated measuring systems and a substantially ideal measuring coil 202 instead of measuring at a transfer point in an inductive charging system, in order to determine and compensate for the load-side losses from the differential measurement. The term "ideal measuring coil 202" may refer to the fact that the coil 202, in particular the measuring probe 104', can be positioned under substantially ideal conditions at the end of the manufacturing process but still in the production facility in the magnetic field 106 of a GA 105 such that the coil 202 experiences a strong coupling with the magnetic field 106. A measurement error of less than ±3.5% may be achievable with the measuring method according to the invention. Requirements of calibration law and technical feasibility may be taken into account in this regard.The measurement method according to the invention may be suitable for calibrating an inductive charging system 100 during production and for verifying the calibration or calibration on-site during subsequent operation, for example, by a calibration authority. Consideration of the power losses occurring in the individual components and the sources of losses shows that power losses affecting the energy supplier and the GA design 105 occur in the PFC filter 601, the converter 602, the primary-side impedance matching network 603, and the magnetic field 106. The GA 105 is the responsibility of the energy supplier as the operator of the GA. However, it has also been shown that these components 601, 602, 603, 106 are influenced by the consumer and energy user, for example, through the parking position, the load, the battery state, and the charging power.Thus, according to one aspect of the present invention, a method for calibrated measurement of the energy provided to a secondary-side charging plate 104 in a primary-side charging plate and / or a primary-side charging plate 105 for measuring the energy provided to a secondary-side charging plate 104 is provided, in which energy losses are taken into account in a calibrated manner. Energy losses caused by the primary-side charging plate are not included in the measurement result. Thus, the measurement result only contains the energy supplied to the load for charging, including the energy losses generated by the secondary-side charging plate 104 and the load's behavior.The exclusion of energy losses on the primary charging plate, which are essentially the responsibility of the energy supplier, and the inclusion of disruptive factors influenced by the consumer and energy recipient, such as energy losses due to the parking position, the load, the battery condition, and the charging power, can be considered a polluter-pays measurement. Thus, the measured value for the supplied energy is suitable for billing the consumer. In order to ensure that such an exclusive, direct measurement during operation, i.e.In order to avoid the use of complex technology such as laboratory measurement technology, essentially during the charging of a vehicle, a two-stage procedure is proposed. In this process, a correction value is first determined during a calibration phase under essentially ideal conditions, which essentially includes the losses of the primary charging plate alone and without influence from the driver. This correction value is stored in the GA 105. During an operating phase, the energy actually provided by the energy supplier can then be determined essentially solely by the GA 105 and the sensors installed in it by means of an input power measurement and deduction of the correction value. This is then the energy supplied to the consumer, for which the consumer can also be billed.The energy supplied by the energy supplier shall include the energy supplied to the consumer, including losses in the GA 105 caused by the consumer and thus beyond the control of the energy supplier. Losses caused by the GA 105 are not billed to the consumer. Such a determination of the supplied energy may be compliant with calibration law. The calibration of the measurement of magnetically transmitted energy takes place during system production, specifically at the end of the line, and not during the system's actual operation. The calibration of the measurement of magnetically transmitted energy is performed by measuring the power at two different points in the system 100.The input power is measured on the primary side and the magnetic power is measured in an idealized measuring coil 104' on the secondary side, whereby the idealized measuring coil 104' simulates a VA 104. The provision of the two measurements enables the formation of a difference. For the legal metrology-compliant power measurement, the power is measured in a first measurement directly at the input of the primary side 105 using calibrated measuring sensors. This measurement is carried out using a calibrated measuring device. The two measurements are used for calibration before the system is put into operation in order to ensure legal metrology-compliant measurement during the operating phase. By comparing the measurement of the measuring sensors with calibrated measuring devices, any measurement error of the measuring sensors can be compensated for by calibration. The error in the measured power at the input of the primary side 105 is referred to as P. GA,errand expresses the measurement error of the measuring sensors 702 at the input of the GA 105. In addition to the measurement and calibration of the input measuring sensors 702, the intrinsic power loss of the primary side 105 is determined as a disturbance factor in a second measurement, which is free from the influencing factors of the secondary side 104 and is therefore also attributable to the energy supplier, since it depends on the intrinsic factors of the GA 105, such as the GA design. This intrinsic power loss of the primary side 105 is determined as part of the correction value and subtracted from the power measurement of the input measuring sensors in the subsequent measurements during operation of the GA 105. The intrinsic power loss of the primary side determined with the second measurement using the idealized measuring probe MVA 104' is referred to as Pintrand must be excluded from the power measurement, as it is caused by the GA 105 used by the energy supplier and therefore cannot be charged to the consumer. Furthermore, a correction value for the power loss is calculated during the calibration phase. PMVA,errof the measuring coil on the secondary side 104, 104', which is added to the input power measurement during operation. This disturbance factor is the power loss of the ideal measuring probe. Losses on the secondary side are essentially always attributed to the load. If the input power P(i) at the input of the primary side at time i ^∆t is measured with the input power measurement sensors installed in the GA 105 during operation of the GA 105, the value of the input power measurement P(i) must be compensated with three correction factors PGA,err , Pintr , PMVA,err in order to obtain a calibrated power measurement provided to the load. The calibrated power Pcal(i) at time i ^∆t is: The calibrated power Pcal(i) at time i ^∆t is thus the measured power P(i) at the input of the primary side 105 at time i ^∆t minus the error and / or disturbance factor of the measured power at the input of the primary side P GA,err , minus the disturbance factor of the intrinsic power loss P intr the primary side and plus the disturbance factor of the power loss P MVA,err of the measuring coil MVA 104' on the secondary side. Here, i denotes an integer value that indicates the index of the measurement of the input power of the GA 105. ∆t is the time interval between the measurements. The value Pcal(i)can be displayed on a display device of the correction device 705' as the power currently delivered to the vehicle. The correction factors resulting from the disturbance factors depend on the instantaneous power, i.e. PGA,err = PGA,err(P(i)), Pintr = Pintr(P(i)) and PMVA,err = PMVA,err(P(i)). This takes into account that the power loss can be dependent on the current and thus describes a characteristic curve. Such a characteristic curve may be written into the memory device 705 of the primary-side charging plate 105 for correction. In another example, the power loss may be a constant and essentially independent of the current. The energy Wcal supplied to the consumer is calculated from the calibrated power measurement Pcal(i) by multiplying the power by the total measurement time.When the energy flow changes, the energy is calculated from the integration of the power over time, which is approximated by means of discrete measurements as the sum of all power measurements multiplied by the measurement interval time. Here, T denotes the total measurement time, dt the time differential, and N the total number of measurements. During the calibration phase of the power measurement, compensation values ​​and / or a compensation characteristic curve are determined for the measurement phase. To determine the compensation characteristic or correction characteristic, a specified nominal power range is run through the MVA 104', for example, a power range from 9.1 kW to 11.1 kW. The characteristics of the power correction parameters P GA,err and P intrIn particular, the characteristics of the corresponding correction values ​​can be implemented either as a first-order polynomial or as conversion tables in software and written into the memory device 705. In this case, a current dependence of can be neglected and included as a constant in the calculation. The polynomial has the form: A conversion table is stored in the following form. Figs. 7 to 10 show various methods for calibrating the power measurement. These are various embodiments of methods that can be used to approximate the output power. The methods can be implemented in a compensation device 706. A switch can be provided in the compensation device 706, with which at least one of the methods can be selected. Fig. 7 shows an arrangement for calibrating the input power measurement of a GA 105 according to an exemplary embodiment of the present invention. Fig. 7 shows the compensation device 706 for determining a correction value and for writing or loading the correction value onto a primary-side charging plate 105. The compensation device 706 thus serves to calibrate a primary-side charging plate 105 and has a selection device 707, an evaluation device 708, and a writing device 709.The selection device 707 is configured to select at least one component 601, 602, 603 to be corrected or a faulty component 601, 602, 603 in the primary-side loading plate 105 and / or to select at least one comparison measuring device 701, 204'', for example, a calibrated sensor 701, 204'' and / or a calibrated sensor 701, 204''. The component 601, 602, 603 to be corrected may be selected indirectly by selecting corresponding sensors 702, 703 installed in the primary-side loading plate 105, and its disturbance factor, for example, its errors or losses, may be determined by means of a differential measurement across the sensors 701, 702, 703, 204''. The at least one component 601, 602, 603 to be corrected is influenced by at least one disturbance factor selected from the group of disturbance factors consisting of a measurement error P. GA,err compared to a reference value, an intrinsic power loss P intror an intrinsic loss P intr , and a loss P MVA,err ,, in particular a measurement loss P MVA,err , from the secondary charging plate 104, 104'. The evaluation device 708 is further configured to determine a total disturbance factor of the respective disturbance factors, for example the power losses P GA,err , P intr , P MVA,err, which has at least one faulty component 601, 602, 603, and for determining a correction value from the total disturbance factor of the respective losses of the at least one component. The evaluation device is designed to determine a correction value from the total disturbance factor and, by means of a writing device 709, to write the total disturbance factor as a correction value into a memory device 705 of the primary-side charging plate 105. In Fig. 7 to Fig. 10, the selection of calibrated comparison sensors is indicated by capital letters A, E, F, and the selection of sensors installed in the primary-side charging plate 105 is indicated by lowercase letters b, c. The primary-side charging plate 105 or GA 105 can be used for the calibrated measurement of the energy provided to a secondary-side charging plate 104, 104'. The energy is provided via the magnetic field 106.The primary-side charging plate 105 has an input power measuring device 702, a memory device 705, and a correction device 705', wherein the input power measuring device 702 or the built-in sensor 702 is configured to determine an input power P(i) at the primary-side charging plate 105. The correction device 705' is configured to read a correction value from the memory device 705 of the primary-side charging plate 105. The correction value corrects at least one disturbance factor, for example an error, a loss, or a power loss, of at least one lossy component 601, 602, 603 of the primary-side charging plate or of at least one component 601, 602, 603 of the primary-side charging plate to be corrected, wherein the disturbance factor is selected from the group of power losses consisting of a loss measurement error P. GA,err compared to a calibrated reference sensor value, an intrinsic loss Pintr and a measurement loss P MVA,err from the secondary load plate. In one example, a correction value may be the negative value of a disturbance factor, such as a loss PGA,err , Pintr , PMVA,err, be. The correction device 705' is set up to provide a corrected measured value. The actual power consumption value Pcal(i) assigned to the consumer can then be displayed on a display device 711 connected to the correction device 705'. In one example, the energy consumption required by MID / MessEG is displayed, for example, in kWh. The power can optionally be displayed for information purposes. To measure the input power, the input sensors 702 installed in the GA 105 or the input power measuring device 702 are used, for example a voltage sensor and a current sensor. At the end of the line, i.e. at the end of the production process, the input power measurement by the sensors 702 of the GA 105 is compared with a calibrated power measuring device 701. The measurement is carried out over the nominal power range, for example a power range from 9.1 kW to 11.1 kW.To travel through the power range, a variable load 704 is used on the MVA 104', which is controlled, for example, by the selection device 707. The control of the comparison measurement is represented by letter F in Fig. 7. The disturbance factor or the correction power parameter P is thus derived from the comparison between the measured power by the installed sensors 702 and the calibrated measuring device 701. GA,err as a characteristic curve depending on the input power, with which the sensor values ​​of the input power measuring device 702 are corrected for a certain instantaneous power consumption. The correction measurement is therefore carried out in the calibration area 710a for the determination of P GA,errbetween the calibrated sensors 701 and the input sensors 702. For this purpose, the setting A, b, F is selected on the selection device 707. If the correction values ​​are stored in the storage device 705, the GA 105 can independently correct its sensor values ​​of the input sensors 702 in a standalone operation. The corrected sensors thus provide a calibrated input power measurement. Fig. 8 shows an arrangement for calibrating the losses of the GA 105 without the PFC filter 601 according to an exemplary embodiment of the present invention. The calibration of the losses of the GA 105 without the PFC filter 601 serves to determine a part P' intrthe intrinsic losses of the GA 105. To determine this, the internal power measurement in the direction of power propagation behind the PFC filter 601 is compared with the measured power at the MVA 104' at the end of the belt. The internal power measurement behind the PFC filter 601 is carried out using the sensors 703 built into the GA 105, which are arranged behind the PFC filter 601 in the direction of power propagation. The measurement is carried out over the nominal power range, which can be varied with the variable load 204' of the MVA 104'. The power losses P MVA,err of the MVA 104' are subtracted. The comparison between the measured power by the installed sensors 703 with the calibrated sensors 204'' of the MVA 104' thus results in a correction parameter or correction value for the intrinsic power loss P' intras a characteristic curve depending on the input power, with which the sensor values ​​of the sensors 703 behind the PFC filter must be corrected during the autonomous operation of the GA 105 in order to be able to provide power measurement values ​​for the consumer via the correction device 705' that meet the calibration conditions. The measurement 703 can be used, although only a portion of the intrinsic losses arise, since the sensors 703 are closer to the inductive power transmission. The measurement with sensors 703 decouples PFC losses from the inductive power transmission. The legally defined error tolerance of the power determination between the measured and corrected power and the actual power must be maintained. The errors and losses must be distributed between the power measurement at the input of the power path and the drift and / or tolerance of the components involved in the power path.The DC power can be determined more accurately than the three-phase 50 Hz input power. With more accurate measurements, greater tolerance can be allowed for the power elements. The input power and PFC losses are calibrated separately. The correction measurement is thus performed in calibration range 710b for determining a portion of the intrinsic power loss P'. intr between the calibrated sensors 204' of the MVA 104' and the installed sensors 703 behind the PFC filter 601. For this purpose, the setting c, E, F is selected on the selection device 707. If the correction values ​​are stored in the memory device 705, the GA 105 can independently correct its sensor values, for example, in autonomous operation. The corrected sensors 703 or the sensor values ​​of the sensors 703 behind the PFC, which are assigned P' intrcorrected, thus providing a power measurement with a partial compensation of the GA losses, namely the GA losses without the losses of the PFC filter. The disturbances or losses taken into account by this calibration method include the partial intrinsic GA losses P'intr with the power loss Pconv of the converter 602, the power loss Pmatch of the impedance match 603 and the power loss Pmag of the magnetic field 106. Fig. 9 shows an arrangement for calibrating the intrinsic losses of the GA 105 according to an exemplary embodiment of the present invention. The calibration of the intrinsic losses of the GA 105 serves to determine the total intrinsic losses P intr the GA 105. To determine the intrinsic losses P intrAt the end of the line, an internal power measurement is performed on the GA 105 using the input power measuring device 702 at the input for the voltage supply 107 and compared with the measured power at the MVA 104'. The power losses PMVA,err of the MVA 104' are added together. Although the measurement from Fig. 8 can only determine a portion of the intrinsic losses compared to the measurement from Fig. 9, the measurement from Fig. 8 can be useful because the measurement from the sensors 703 is closer to the inductive power transmission. It decouples, for example, PFC losses from the inductive power transmission. The measurement is performed over the nominal power range, for example, a power range from 9.1 kW to 11.1 kW. To span the power range, a variable load 704 is used on the MVA 104', which is controlled, for example, by the selection device 707.The comparison between the power measured with the installed sensors 702 or the input power measuring device 702 and the calibrated sensors 204'' of the MVA 104' thus results in the correction parameter or correction value, in particular the disturbance factor, for the intrinsic power loss P. intr as a characteristic curve depending on the input power, with which the sensor values ​​of the input power measuring device 702 must be corrected during the autonomous operation of the GA 105 in order to be able to provide power measurement values ​​for the consumer via the correction device 705' that meet the calibration conditions. The correction measurement is thus carried out in the calibration area 710c for the determination of the intrinsic power loss P intrbetween the calibrated sensors 204' of the MVA 104' and the built-in sensors of the input power measuring device 702. For this purpose, the setting b, E, F is selected on the selection device 707. If the correction values ​​are stored in the memory device 705, the GA 105 can independently correct its sensor values. The corrected sensor values ​​of the input power measuring device 702 thus provide a power measurement with compensation for all GA-internal losses as well as the losses in the magnetic field, including the losses P pfc in the PFC Filter 601, which indicate the power loss of the reactive power correction. The losses considered by this calibration method include the total intrinsic GA losses P intr with power loss P pfc the reactive power correction, the power loss P conv of the converter 602, the power loss P match the impedance matching 603 and the power loss P magof the magnetic field 106. Fig. 10 shows an arrangement for the complete calibration of a power measurement in a GA 105 according to an exemplary embodiment of the present invention. The complete calibration of a power measurement in a GA 105 essentially comprises the calibration of the input power measurement of a GA 105 according to Fig. 7 and the calibration of the total intrinsic losses of the GA 105 from Fig. 9. The complete calibration of a power measurement in a GA 105 is carried out at the end of the tape in two steps. In a first step, the internal measurement of the input power by the sensors 702 of the GA 105 is compared with a calibrated power measuring device 701, thus calibrating the input power measuring device 702 by determining the correction power parameter PGA,err.In a second step, the total intrinsic power loss Pintr is determined, and the power loss Pmag of the magnetic field 106 and the internal power measurement are calibrated. The correction parameters PGA,err, Pintr, Pmag or disturbance factors PGA,err, Pintr, Pmag can be stored in the memory device 705 and used by the correction device 705' to provide corrected sensor values ​​during the autonomous operation of the GA 105, thus enabling a calibrated input power measurement P(i) with compensation for all GA-internal and magnetic field losses. The calibrated calibrated power is thus obtained as: Thus, the input power measuring device 702 installed in the GA 105 can provide values ​​for the power measurement, which are based on a calibrated power measurement at the input of the GA 105 and essentially contain no intrinsic losses of the primary side 105. Thus, all losses for which the energy supplier and operator of a GA 105 is responsible from the provided power P cal (i) is eliminated. The power P cal (i) can be displayed on a display device 711 and corresponds to the power allocated to the load. Any additional losses that may occur during charging station operation are then caused by the secondary side and are allocated to the load. This method is technically and economically feasible and simultaneously meets the requirements of calibration law. P calis the power delivered to the consumer, including all losses attributable to the consumer. The correction measurement is carried out in a first stage in the calibration range 710a' for determining PGA,err between the calibrated sensors 701 and the input sensors 702. For this purpose, the setting A, b, F is selected on the selection device 707. The correction measurement is carried out in a second stage in the calibration range 710c' for determining the intrinsic power loss Pintr between the calibrated sensors 204' of the MVA 104' and the built-in sensors of the input power measuring device 702. For this purpose, the setting b, E, F is selected on the selection device 707. The order in which both stages are carried out is arbitrary and can be interchanged. Fig.11 shows a flowchart for a method for determining a measurement error in a primary-side charging plate when providing energy to a secondary charging plate according to an exemplary embodiment of the present invention. The method begins in state S1100 in idle mode. In state S1101, at least one component to be corrected in the primary-side charging plate is selected, wherein the at least one component to be corrected is influenced by at least one disturbance factor selected from the group of disturbance factors consisting of a measurement error compared to a comparison value, an intrinsic partial loss, an intrinsic loss and a loss from the secondary charging plate. In state S1102, the method continues by determining an overall disturbance factor of the respective individual disturbance factors, for example measurement errors and losses, of the at least one component to be corrected or the error- orlossy component and determining a correction value from the total disturbance factor. In state S1103, the total disturbance factor is written as a correction value into a memory device of the primary-side charging plate. The method ends in state S1104. Fig. 12 shows a flowchart for methods for calibrated measurement of the energy provided to a secondary-side charging plate 104 in a primary-side charging plate 105 according to an exemplary embodiment of the present invention. The method begins in state S1200 in an idle mode. In state S1201, an input power P(i) at the primary-side charging plate 105 is determined.In state S1202, a correction value is read from a memory device of the primary-side charging plate, wherein the correction value corrects at least one disturbance factor of at least one component of the primary-side charging plate to be corrected, wherein the disturbance factor is selected from the group of disturbance factors consisting of a measurement error PGA,err compared to a comparison value, intrinsic partial loss P'intr , an intrinsic loss Pintr and a loss from the secondary charging plate PMVA,err. In state S1203, an error-corrected or calibrated measured value Pcal (i) is provided. The method ends in state S1204. It should also be noted that “comprising” and “having” do not exclude other elements or steps, and “a” or “an” does not exclude a plurality.Furthermore, it should be noted that features or steps described with reference to one of the above embodiments may also be used in combination with other features or steps of other embodiments described above. Reference symbols in the claims are not to be considered as limiting.

[0002] List of reference symbols 100 inductive charging system 100' inductive charging system with GA and measuring probe 101 radio connection 102 vehicle chassis 103 ground 104 vehicle assembly 104' measuring probe 105 ground assembly 106 magnetic field 107 main connection 201 coil holding device 202 coil 203 coil positioning device 204 measuring device box 204' load 204'' measuring devices 601 PFC filter 602 converter 603 primary side impedance matching network 604 secondary side impedance matching network.605 Rectifier 606 Primary-side HVDC circuit 607a Primary circuit capacitors 607b Secondary capacitors 608 Secondary-side HVDC circuit L1 Primary coil L2 Secondary coil 701 Calibrated power meter 702 Input power measuring device 703 Sensors behind the PFC filter 705 Storage device 705' Correction device 706 Compensation device 707 Selection device 708 Evaluation device 709 Writing device 710a, 710a' Calibration range for the determination of PGA,err 710b Calibration range for the determination of P'intr 710c, 710c' Calibration range for the determination of Pintr 711 Display device S1100 - S1104 States of a process S1200 - S1204 States of a process.

Claims

1. A method for determining a correction value for an energy measurement in a primary-side charging plate (105) when providing energy to a secondary charging plate (104), comprising: selecting at least one component (601, 602, 603) to be corrected in the primary-side charging plate (105); wherein the at least one component (601, 602, 603) to be corrected is influenced by at least one disturbance factor selected from the group of disturbance factors consisting of: a measurement error (P GA,err ) compared to a reference value; an intrinsic partial loss ( P’intr); an intrinsic loss (Pintr ); and a measurement loss (PMVA,err) from the secondary charging plate; determining a total disturbance factor of the respective disturbance factors of the at least one component to be corrected; determining the correction value from the total disturbance factor; writing the total disturbance factor as a correction value into a memory device (705) of the primary-side charging plate (105).

2. A method for determining a correction value according to claim 1, wherein the correction value is a correction characteristic.

3. A method for determining a correction value according to claim 1 or 2, wherein the at least one disturbance factor is determined by an input power measurement at the primary charging plate.

4. A method for determining a correction value according to one of claims 1 to 3, wherein the at least one disturbance factor is determined by a magnetic field measurement in a magnetic field caused by the primary charging plate (105).

5. Compensation device (706) for determining a correction value for an energy measurement in a primary-side charging plate (105) and for writing the correction value to the primary-side charging plate (105), comprising: a selection device (707); an evaluation device (708); a writing device (709); wherein the selection device (707) is configured to select at least one component (601, 602, 603) to be corrected in the primary-side charging plate (105); wherein the at least one component (601, 602, 603) to be corrected is influenced by at least one disturbance factor selected from the group of disturbance factors consisting of: a measurement error (P GA,err ) compared to a reference value; an intrinsic partial loss ( P’intr); an intrinsic loss (Pintr ); and a measurement loss (PMVA,err) from the secondary loading plate (104, 104'); wherein the evaluation device (708) is configured to determine a total disturbance factor of the respective disturbance factors of the at least one component (601, 602, 603) to be corrected, and; wherein the evaluation device (708) is configured to determine the correction value from the total disturbance factor; wherein the writing device (709) is configured to write the total disturbance factor as a correction value into a memory device (705) of the primary-side loading plate. 6.A method for calibrated measurement of the energy provided for a secondary-side charging plate in a primary-side charging plate, comprising: determining an input power (P(i)) at the primary-side charging plate (105); reading a correction value from a memory device (705) of the primary-side charging plate (105); wherein the correction value corrects at least one disturbance factor of at least one component (601, 602, 603) of the primary-side charging plate (105) to be corrected, wherein the disturbance factor is selected from the group of. Disturbance factors consisting of: a measurement error (PGA,err ) compared to a comparison value; an intrinsic partial loss (P'intr ); an intrinsic loss (Pintr ); and a measurement loss (PMVA,err) from the secondary charging plate; providing a calibrated measured value (Pcal ).

7. A primary-side charging plate (105) for calibrated measurement of the energy provided to a secondary-side charging plate, comprising: an input power measuring device (702); a memory device (705); a correction device (705'); wherein the input power measuring device (702) is configured to determine an input power at the primary-side charging plate (105); wherein the correction device (705') is configured to read out a correction value from the memory device (705) of the primary-side charging plate (105); wherein the correction value includes at least one disturbance factor of at least one component (601, 602) to be corrected.603) of the primary-side charging plate (105), wherein the disturbance factor is selected from the group of disturbance factors consisting of: a measurement error (P. GA,err ) compared to a reference value; an intrinsic partial loss (P' intr ); an intrinsic loss (P intr ); and a measurement loss ( PMVA,err ) from the secondary loading plate (104, 104'); and wherein the correction device (705') is arranged to provide a calibrated measured value (P cal ).

8. A measuring probe (104') for a magnetic field measurement, comprising: a coil (202); a coil holding device (201); a coil positioning device (203); wherein the coil holding device (201) is adapted to position the coil in a magnetic field; wherein the coil positioning device (203) is configured to position the coil (202) in the magnetic field such that the coil experiences a large and / or maximum coupling with the magnetic field.

9. The measuring probe (104) according to claim 8, wherein the coil positioning device (203) further comprises: a locking element; wherein the locking element is configured to lock into the housing of a primary-side loading plate (105) in order to bring about the large and / or maximum coupling with the magnetic field.

10. The measuring probe (104) according to claim 8 or 9, wherein the coil holding device (201) is designed as a table.

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