KR20220075181A - Apparatus and method for analyzing failure of non-contact power transmission and reception terminals - Google Patents

Abstract

An analysis device is provided. The analysis device is disposed between the wireless power transmitting end and the wireless power receiving end, the detection pad provided with a pickup antenna coil; An analyzer that analyzes an operating impedance frequency characteristic between the transmitting end and the receiving end using the pickup antenna coil, wherein the analyzer analyzes the operating impedance frequency characteristics for each harmonic of the switching frequencies of the transmitting end and the receiving end can do.

Description

Apparatus and method for analyzing failure of non-contact power transmission and reception terminals

The present invention relates to an apparatus and method for analyzing failures of a non-contact power transmission end and a power receiving end.

Failures in power facilities are not analyzed and provided quickly and efficiently, causing inconvenience.

In particular, there is a need to propose a failure analysis method for a system for wirelessly transmitting power. In the failure analysis process, it is necessary to analyze the failure of the power transmitting end and the receiving end in a non-contact manner so that the wireless power system is not damaged.

Korean Patent Application Laid-Open No. 2019-0044232 discloses a technique for analyzing a frequency based on an acoustic signal sensed from a device and checking whether a power converter for speed control has a failure according to the analysis result.

Korea Patent Publication No. 2019-0044232

An object of the present invention is to provide an analysis apparatus and an analysis method for analyzing failures of a non-contact power transmission end and a reception end in a non-contact manner.

The analysis device of the present invention is disposed between the wireless power transmitting end and the wireless power receiving end, the detection pad provided with a pickup antenna coil; and an analyzer that analyzes the frequency characteristic of the operating impedance between the transmitting end and the receiving end using the pickup antenna coil.

The analyzer may analyze the operating impedance frequency characteristic for each harmonic of the switching frequencies of the transmitting end and the receiving end.

In the analysis method of the present invention, when a wireless power receiving end is disposed at a first position on a power transmission rail drawn from a wireless power transmitting end, on the power transmission rail, in a second position between the transmitting end and the first position A pickup antenna coil may be used to radiate a scan signal, and the radiated signal emitted from the transmitting end or the receiving end may be obtained.

The analysis method of the present invention may analyze an operating impedance frequency characteristic between the transmitting end and the receiving end through comparison of the scan signal and the emission signal, or check a failure of the transmitting end or the receiving end.

According to the present invention, failures of a wireless power system, for example, a non-contact power transmitting end and a receiving end can be analyzed in a non-contact manner.

The analysis apparatus of the present invention can analyze the failure of the wireless power system by simply placing the detection pad between the transmitting end and the receiving end in a state where the transmitting end or the receiving end is left as it is.

1 is a schematic diagram showing an analysis device of the present invention.
2 is a block diagram showing an analysis device of the present invention.
3 is a schematic diagram showing the operation of the analysis device.
4 is a flowchart illustrating an analysis method of the present invention.
5 is a diagram illustrating a computing device according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, the embodiments of the present invention will be described in detail so that those of ordinary skill in the art to which the present invention pertains can easily implement them. However, the present invention may be embodied in several different forms and is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

In the present specification, duplicate descriptions of the same components will be omitted.

Also, in this specification, when it is said that a certain element is 'connected' or 'connected' to another element, it may be directly connected or connected to the other element, but other elements in the middle It should be understood that there may be On the other hand, in this specification, when it is mentioned that a certain element is 'directly connected' or 'directly connected' to another element, it should be understood that another element does not exist in the middle.

In addition, the terms used herein are used only to describe specific embodiments, and are not intended to limit the present invention.

Also, in this specification, the singular expression may include the plural expression unless the context clearly dictates otherwise.

Also, in this specification, terms such as 'include' or 'have' are only intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, and one or more It is to be understood that the existence or addition of other features, numbers, steps, operations, components, parts, or combinations thereof, is not precluded in advance.

Also in this specification, the term 'and/or' includes a combination of a plurality of described items or any item of a plurality of described items. In this specification, 'A or B' may include 'A', 'B', or 'both A and B'.

Also, in this specification, detailed descriptions of well-known functions and configurations that may obscure the gist of the present invention will be omitted.

1 is a schematic diagram showing an analysis device of the present invention.

The analysis apparatus shown in FIG. 1 may include a detection pad 101 and an analyzer 100 .

The detection pad 101 may be disposed between the wireless power transmitter 10 and the wireless power receiver 30 .

For example, the detection pad 101 may be spatially disposed between the transmitting end 10 and the receiving end 30 . According to the present embodiment, the detection pad 101 may be disposed between the transmitting end 10 and the receiving end 30 on the propagation path of the wireless power propagated in the air.

Power (electricity) may be provided to the power transmission end 10 . The power receiving end 30 may receive the power provided from the transmitting end 10 and provide it to the load 90 requiring power. The power receiving end 30 may be provided with a pickup coil 40 and a regulator 50 that converts power generated in the pickup coil 40 into power (voltage or current) required by the load 90 . The regulator 50 may provide power to the load 90 in a wired or wireless manner.

On the other hand, in order to reduce the loss of power propagated wirelessly, the power transmission rail 20 drawn from the transmission terminal 10 may be provided. The power transmission end 10 and the power transmission rail 20 may be electrically connected by wire.

When the power transmission rail 20 extending from the power transmission end 10 and through which electric power (electricity) flows is provided, the power receiving end 30 may be disposed in close contact with the power transmission rail 20 . The power receiving end 30 may be disposed as close to the power transmission rail 20 as possible while being spaced apart from the core wire of the power transmission rail 20 through which electricity flows. For example, the power receiving end 30 may be disposed in a non-contact position on the power transmission rail 20 at a first position ① of the power transmission rail 20 .

The power receiving end 30 may wirelessly receive electricity output from the transmitting end 10 and flowing along the power transmission rail 20 .

When the power transmission rail 20 is provided, the detection pad 101 may be disposed on the power transmission rail 20 between the transmitting end 10 and the receiving end 30 . Like the power receiving end 30 , the detection pad 101 needs to be directly connected to the power transmission rail 20 by wire. If the power transmission rail 20 is in the form of a cable covered with a non-conductive sheath, it is sufficient if the detection pad 101 is placed on the sheath of the cable as it is. When the power transmission rail 20 is provided, the detection pad 101 is preferably disposed in close contact with the core wire as much as possible within a range that satisfies a state of being spaced apart from the core wire of the power transmission rail 20 through which electricity substantially flows.

The detection pad 101 may be disposed on the power transmission rail 20 in a non-contact manner. The detection pad 101 may be disposed at a first position ① at which the power receiving end 30 is disposed and a second position ② between the power transmitting end 10 . Both the first location ① and the second location ② may represent a specific point on the power transmission rail 20 .

Based on the power transmission end 10, the length of the power transmission rail 20 to the second position ② may be shorter than the length of the power transmission rail 20 to the first position ①. When the power transmission rail 20 is provided, the detection pad 101 is not disposed between the power transmission end 10 and the reception end 30 on a map or in space, but transmits along the power transmission rail 20 . It may be disposed between the stage 10 and the receiving end 30 .

The detection pad 101 may be provided with a pickup antenna coil 103 that receives wireless power (electricity) propagated from the wireless power transmitter 10 to the wireless power receiver 30 .

The analyzer 100 may analyze an operating impedance frequency characteristic between the transmitting end 10 and the receiving end 30 using the pickup antenna coil 103 . The operating impedance frequency characteristic may indicate an operating impedance and frequency characteristic between the transmitting end 10 and the receiving end 30 . Alternatively, the operating impedance frequency characteristic may indicate a frequency characteristic with respect to the operating impedance between the transmitting end 10 and the receiving end 30 .

The analyzer 100 may analyze the operating impedance frequency characteristic for each harmonic of the switching frequencies of the transmitting end 10 and the receiving end 30 .

2 is a block diagram showing an analysis device of the present invention.

The analyzer 100 may include a scanning unit 110 , a detection unit 120 , a measurement unit 130 , an analysis unit 140 , a calculation unit 150 , and an inspection unit 170 .

The scan unit 110 may provide a scan signal corresponding to an integer multiple harmonic sine wave of the switching frequency to the detection pad 101 in order to measure the operating impedance frequency characteristic.

The power transmission stage 10 may include a PWM (Pulse Width Modulation) control switch to generate electricity of a set frequency. The switching frequency may represent a frequency at which on and off of the power-related PWM switch provided in the transmitting end 10 or the receiving end 30 is one cycle.

The pickup antenna coil 103 provided on the detection pad 101 may wirelessly radiate a scan signal. The scan signal wirelessly radiated from the pickup antenna coil 103 may be directly propagated to the transmitting end 10 or the receiving end 30 . When the power transmission rail 20 is provided, the scan signal may be transmitted to the power transmission end 10 or the power receiving end 30 along the power transmission rail 20 .

The scan signal transmitted to the power transmission end 10 may be processed by the power transmission end 10 and then emitted back into the air or along the power transmission rail 20 . The scan signal transmitted to the power receiving end 30 may be processed by the receiving end 30 and then emitted to the air or along the power transmission rail 20 . A scan signal emitted after being processed by the transmitting end 10 or the receiving end 30 may correspond to the emitted signal. The pickup antenna coil 103 may wirelessly receive the emitted signal output from the transmitting end 10 or the receiving end 30 .

The analyzer 100 may analyze the operating impedance frequency characteristic by comparing the scan signal s and the emission signal t.

The detection unit 120 may detect a phase difference between the scan signal s emitted through the detection pad 101 and the emission signal t received from the transmitting end 10 or the receiving end 30 . For example, the detection unit 120 calculates a phase angle corresponding to the phase difference between the voltage of the harmonic sinusoidal signal and the voltage of the detection pad 101, which is an integer multiple of the operating impedance frequency between the transmitting end 10 and the receiving end 30. can

The measurement unit 130 may measure the operating impedance for each harmonic of the switching frequency of the transmitting end 10 and the receiving end 30 .

The analysis unit 140 may analyze frequency characteristics of the transmitting end 10 and the receiving end 30 .

The calculator 150 may calculate the input impedance viewed from the scan unit 110 with respect to the circuit loop formed by the transmitting end 10 and the receiving end 30 . The transmitting end 10 and the receiving end 30 may form a kind of circuit loop (eg, a closed loop) in a relationship of wirelessly transmitting and receiving power. In this case, the calculator 150 may calculate an input/output impedance for the corresponding circuit loop from the standpoint of the scan unit 110 .

The first maximum value corresponding to the maximum value of the voltage of the harmonic sinusoidal signal that is an integer multiple of the operating impedance frequency between the transmitting end 10 and the receiving end 30, the second corresponding to the maximum value of the voltage across both ends of the detection pad 101 A maximum may be defined. The voltage at both ends of the detection pad 101 may represent a voltage between one end and the other end of the pickup antenna coil 103 . At this time, the calculation unit 150 calculates the input impedance viewed from the scanning unit 110 with respect to the circuit loop formed by the transmitting end 10 and the receiving end 30 by using the first maximum value and the second maximum value. can do. In this case, the input impedance calculated by the calculator 150 may be included in the operating impedance of the aforementioned operating impedance frequency characteristic. As a result, when the input impedance is calculated, the operating impedance frequency characteristic may be analyzed by the calculator 150 .

The inspection unit 170 may check the failure of the power transmitting end 10 or the receiving end 30 by using the operating impedance frequency characteristic.

For example, the inspection unit 170 may compare and analyze a reference value and an actual value.

In this case, the reference value may include operating impedance frequency characteristics for each harmonic analyzed during normal operation.

The measured value may include an operating impedance frequency characteristic for each harmonic analyzed in real time.

The inspection unit 170 may check the failure of the power transmission end 10 or the receiving end 30 by using the deviation between the reference value and the measured value.

3 is a schematic diagram showing the operation of the analysis device.

When a scan signal is injected through each circuit part of the wireless power transmitting end 10 and the receiving end 30 to be measured, the scan signal passes through the circuit of each stage and is converted into an emission signal reflecting the circuit operating impedance frequency of each stage and can be released outside.

Specifically, the scan signal may be wirelessly propagated to the power transmission rail 20 , and may be input to the power transmission terminal 10 on the power transmission rail 20 .

The scan signal input to the power transmission stage 10 is a power transmission unit power semiconductor 11 that converts power at the transmission stage 10 , a power transmission unit capacitor filter 13 , a power transmission unit inductor filter 15 , and a single-phase PWM inverter 17 . ) and the like, and then ride the power transmission rail 20 and may be emitted.

The scan signal travels on the power transmission rail 20 and may be wirelessly propagated to a pickup coil of the power receiving end 30 .

The scan signal input to the power receiving stage 30 through the pickup coil 40 is the power receiving unit inductor filter 41 , the power receiving unit capacitor filter 43 , the power receiving unit power semiconductor 45 , the regulator 50 , and the load 90 . ) and the like, it may be emitted to the power transmission rail 20 by the pickup coil 40 again.

The emission signal corresponding to the scan signal emitted to the outside after passing through the circuit elements of each stage inside the transmitting end 10 or the receiving end 30 may be in a state in which the operating impedance or frequency characteristics of the circuit at each stage are reflected.

The inspection unit 170 may check whether each stage circuit included in the power transmitting end 10 or the receiving end 30 has a failure according to a normal state, and display the check results on various displays.

The calculator 150 may include a transmitter harmonic impedance calculator 151 and a power receiver harmonic impedance calculator 153 .

The power transmission unit harmonic impedance calculator 151 may calculate the impedance of the power transmission end 10 .

The power receiving unit harmonic impedance calculating unit 153 may calculate the impedance of the power receiving end 30 .

The inspection unit 170 may include a power transmission unit failure inspection and state management unit 171 , and a power reception unit failure inspection and state management unit 173 .

The power transmission unit failure check and state management unit 171 may check the failure of the power transmission end 10 .

The power reception unit failure check and state management unit 173 may check the failure of the power reception end 30 .

Since the failure determination condition varies depending on the capacity and configuration of the non-contact power transmitting end 10 and the receiving end 30 , it may be set based on data actually measured during normal operation after the product is manufactured.

4 is a flowchart illustrating an analysis method of the present invention.

The analysis method illustrated in FIG. 4 may be performed by the analysis apparatus illustrated in FIG. 1 or FIG. 2 . Alternatively, the analysis method may be described as an operation of the analysis device.

The wireless power receiving end 30 may be disposed at a first position on the power transmission rail 20 drawn from the wireless power transmitting end 10 . At this time, the analysis device radiates a scan signal using the pickup antenna coil 103 at a second position between the power transmission end 10 and the first position on the power transmission rail 20, and the transmission end 10 or the number The emission signal emitted from the front end 30 is available.

The analysis device analyzes the operating impedance frequency characteristic between the transmitting end 10 and the receiving end 30 through comparison of the scan signal and the emitted signal, or can check the failure of the transmitting end 10 or the receiving end 30 have.

Specifically, the analysis method may include a scanning step (S 510), a obtaining step (S 520), a calculating step (S 530), and a checking step (S 540).

The scan step ( S510 ) may be an operation performed by the scan unit 110 . In the scanning step (S510), a scan signal may be wirelessly radiated through the pickup antenna coil 103 .

The acquisition step (S520) may be performed by the detection unit 120, the measurement unit 130, and the analysis unit 140. In the acquisition step (S520), the phase difference, operating impedance, and frequency characteristics may be determined from the emission signal of the transmitting end 10 or the emission signal of the receiving end 30 obtained through the pickup antenna coil 103 .

The calculation step ( S530 ) may be performed by the calculation unit 150 . In the calculating step ( S530 ), the input impedance of the transmitting end 10 or the input impedance of the receiving end 30 may be calculated using the phase difference, the operating impedance, and the frequency characteristics. Ultimately, the calculation step ( S530 ) may analyze the frequency characteristic of the operating impedance between the transmitting end 10 and the receiving end 30 .

In the checking step (S540), it is possible to determine whether the power transmission end 10 and the power receiving end 30 have a failure by using the operating impedance frequency characteristic. The inspection step ( S540 ) may be performed by the inspection unit 170 .

5 is a diagram illustrating a computing device according to an embodiment of the present invention. The computing device TN100 of FIG. 5 may be a device (eg, an analysis device, etc.) described herein.

In the embodiment of FIG. 5 , the computing device TN100 may include at least one processor TN110 , a transceiver device TN120 , and a memory TN130 . In addition, the computing device TN100 may further include a storage device TN140 , an input interface device TN150 , an output interface device TN160 , and the like. Components included in the computing device TN100 may be connected by a bus TN170 to communicate with each other.

The processor TN110 may execute a program command stored in at least one of the memory TN130 and the storage device TN140. The processor TN110 may mean a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor on which methods according to an embodiment of the present invention are performed. The processor TN110 may be configured to implement procedures, functions, and methods described in connection with an embodiment of the present invention. The processor TN110 may control each component of the computing device TN100.

Each of the memory TN130 and the storage device TN140 may store various information related to the operation of the processor TN110. Each of the memory TN130 and the storage device TN140 may be configured as at least one of a volatile storage medium and a nonvolatile storage medium. For example, the memory TN130 may include at least one of a read only memory (ROM) and a random access memory (RAM).

The transceiver TN120 may transmit or receive a wired signal or a wireless signal. The transceiver TN120 may be connected to a network to perform communication.

On the other hand, the embodiment of the present invention is not implemented only through the apparatus and/or method described so far, and a program for realizing a function corresponding to the configuration of the embodiment of the present invention or a recording medium in which the program is recorded may be implemented. And, such an implementation can be easily implemented by those skilled in the art from the description of the above-described embodiment.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concept of the present invention as defined in the following claims are also presented. It belongs to the scope of the invention.

10...transmission end
11...transmission power semiconductor
13...Transmission Capacitor Filter
15...Transmission Inductor Filter
17...Single-phase PWM inverter
20...power transmission rail
30...receiver
40...pickup coil
41...Inductor filter for power receiver
43...Capacitor filter in the power receiver
45... power receiving part power semiconductor
50...regulator
90...load
100...analyzer
101...detection pad
103...pickup antenna coil
110...scan section
120...detector
130...Measurement part
140...Analysis Department
150... output
151...Transmission part harmonic impedance calculation part
153... Power receiver harmonic impedance calculator
170...Inspection Department
171...Transmission fault check and status management department
173...Fault check and condition management of power receiver

Claims (9)

a detection pad disposed between the wireless power transmitting end and the wireless power receiving end and having a pickup antenna coil;
An analyzer for analyzing an operating impedance frequency characteristic between the transmitting end and the receiving end using the pickup antenna coil;
The analyzer analyzes the operating impedance frequency characteristic for each harmonic of the switching frequencies of the transmitting end and the receiving end.
According to claim 1,
A power transmission rail extending from the transmission end and through which power flows is provided,
The power receiving end is disposed non-contact with the power transmission rail at a first position of the power transmission rail,
the detection pad is disposed on the power transmission rail in a non-contact manner;
and the detection pad is disposed at a second position between the first position and the power transmission end.
According to claim 1,
A scan unit is provided to provide a scan signal corresponding to an integer multiple harmonic sine wave of the switching frequency to the detection pad in order to measure the operating impedance frequency characteristic,
The pickup antenna coil wirelessly radiates the scan signal, and receives the emission signal output from the transmitting end or the receiving end,
The analyzer analyzes the operating impedance frequency characteristic by comparing the scan signal and the emission signal.
According to claim 1,
A scan unit, a detection unit, a measurement unit, an analysis unit, and a calculation unit are provided,
The scan unit provides a scan signal corresponding to an integer multiple harmonic sine wave of the switching frequency to the detection pad,
The detection unit detects a phase difference between the scan signal emitted through the detection pad and the emission signal received from the transmitting end or the receiving end,
The measuring unit measures the operating impedance for each harmonic of the switching frequency of the transmitting end and the receiving end,
The analysis unit analyzes the frequency characteristics of the transmitting end and the receiving end,
The calculator calculates an input impedance viewed from the scan unit with respect to a circuit loop formed by the transmitting end and the receiving end.
According to claim 1,
A scanning unit for providing a scan signal corresponding to an integer multiple harmonic sine wave of the switching frequency to the detection pad is provided;
When the first maximum value corresponding to the maximum value of the voltage of the harmonic sinusoidal signal of an integer multiple of the operating impedance frequency between the transmitting end and the receiving end and the second maximum value corresponding to the maximum value of the voltage across the detection pad are defined,
An analysis device provided with a calculator for calculating an input impedance viewed from the scanning unit with respect to a circuit loop formed by the transmitting end and the receiving end by using the first maximum value and the second maximum value.
According to claim 1,
An analysis device provided with a detection unit for calculating a phase angle corresponding to a phase difference between a voltage of a sine wave signal of an integer multiple of an operating impedance frequency between the transmitting end and the receiving end and the voltage of the detection pad.
According to claim 1,
An analysis device provided with an inspection unit for checking a failure of the power transmission end or the power receiving end using the operating impedance frequency characteristic.
According to claim 1,
An inspection unit for comparing and analyzing the reference value and the actual value is provided;
The reference value includes an operating impedance frequency characteristic for each harmonic analyzed during normal operation,
The measured value includes an operating impedance frequency characteristic for each harmonic analyzed in real time,
The inspection unit is an analysis device for checking a failure of the power transmission end or the power receiving end using a deviation between the reference value and the measured value.
In the analysis method performed by the analysis device,
When the wireless power receiving end is disposed at a first position on the power transmission rail drawn from the wireless power transmitting end,
On the power transmission rail, a scan signal is radiated using a pickup antenna coil at a second position between the transmitting end and the first position, and an emission signal emitted from the transmitting end or the receiving end is obtained,
An analysis method for analyzing an operating impedance frequency characteristic between the transmitting end and the receiving end by comparing the scan signal and the emitted signal, or checking a failure of the transmitting end or the receiving end.

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