KR102619804B1 - Apparatus and method for transmitting radio power - Google Patents

Apparatus and method for transmitting radio power Download PDF

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KR102619804B1
KR102619804B1 KR1020220059318A KR20220059318A KR102619804B1 KR 102619804 B1 KR102619804 B1 KR 102619804B1 KR 1020220059318 A KR1020220059318 A KR 1020220059318A KR 20220059318 A KR20220059318 A KR 20220059318A KR 102619804 B1 KR102619804 B1 KR 102619804B1
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South Korea
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power
battery
charging
wireless
wireless power
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KR1020220059318A
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Korean (ko)
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KR20230160416A (en
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조태석
이근택
박영준
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대영채비(주)
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
    • B25J13/00—Controls for manipulators
    • B25J13/006—Controls for manipulators by means of a wireless system for controlling one or several manipulators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
    • B25J19/00—Accessories fitted to manipulators, e.g. for monitoring, for viewing; Safety devices combined with or specially adapted for use in connection with manipulators
    • B25J19/005—Accessories fitted to manipulators, e.g. for monitoring, for viewing; Safety devices combined with or specially adapted for use in connection with manipulators using batteries, e.g. as a back-up power source
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
    • B60L53/24—Using the vehicle's propulsion converter for charging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/30—Constructional details of charging stations
    • B60L53/305—Communication interfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/30—Constructional details of charging stations
    • B60L53/35—Means for automatic or assisted adjustment of the relative position of charging devices and vehicles
    • B60L53/38—Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2210/00—Converter types
    • B60L2210/30—AC to DC converters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2210/00—Converter types
    • B60L2210/40—DC to AC converters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/547—Voltage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/549—Current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors

Abstract

본 발명은 전력 수신장치에 구비되어 있는 배터리의 정격전압 및 충전상태에 따라 전력 송신장치에서 전력 수신장치로 전송하는 전력을 가변시킬 수 있는 것으로서 상용 교류전력을 직류전력으로 변환하는 직류전력 변환부와, 직류전력 변환부가 변환한 직류전력을 스위칭시켜 교류전력으로 변환하는 스위칭부와, 스위칭부가 변환한 교류전력을 무선전력 수신장치로 무선 전송하는 전력 송신부와, 무선전력 수신장치와 근거리 통신을 수행하여 배터리의 정격 충전전압 및 정격 충전전류를 포함한 정보와 배터리의 전력 충전상태 정보를 취득하는 통신부와, 통신부를 통해 취득한, 배터리의 정격 충전전압 및 정격 충전전류를 포함한 정보와 배터리의 전력 충전상태 정보에 따라 직류전력 변환부와 스위칭부를 제어하여 전력 송신부에서 전송되는 전력을 제어하는 제어부를 포함하여, 배터리에 전력을 원활하게 충전시킬 수 있고, 과전류 또는 과전압 등으로 인한 안전사고의 발생을 미연에 방지하는 무선전력 전송장치 및 방법에 관한 것이다.The present invention is capable of varying the power transmitted from a power transmitting device to a power receiving device according to the rated voltage and charging state of the battery provided in the power receiving device, and includes a direct current power converter that converts commercial alternating current power into direct current power; , a switching unit that switches the DC power converted by the DC power converter and converts it into AC power, a power transmitter that wirelessly transmits the AC power converted by the switching unit to the wireless power receiver, and short-distance communication with the wireless power receiver. A communication unit that acquires information including the battery's rated charging voltage and rated charging current and the battery's power charging status information, and information including the battery's rated charging voltage and rated charging current and the battery's power charging status information acquired through the communication unit. Accordingly, it includes a control unit that controls the power transmitted from the power transmission unit by controlling the DC power conversion unit and the switching unit, allowing power to be smoothly charged to the battery and preventing safety accidents due to overcurrent or overvoltage in advance. It relates to a wireless power transmission device and method.

Description

무선전력 전송장치 및 방법{Apparatus and method for transmitting radio power}Wireless power transmission device and method {Apparatus and method for transmitting radio power}

본 발명은 무선전력 송신장치가 무선전력 수신장치에 무선으로 전력을 전송하여 배터리에 충전시키게 하는 무선전력 전송장치 및 방법에 관한 것으로 특히 무선전력 수신장치에 구비되어 있는 배터리의 정격 충전전압 및 정격 충전전류와, 배터리의 충전상태에 따라, 무선전력 송신장치에서 무선전력 수신장치로 전송하는 전력을 조절하는 무선전력 전송장치 및 방법에 관한 것이다.The present invention relates to a wireless power transmission device and method that allows a wireless power transmission device to wirelessly transmit power to a wireless power receiving device to charge a battery. In particular, the rated charging voltage and rated charging of the battery provided in the wireless power receiving device are provided. It relates to a wireless power transmission device and method that adjusts the power transmitted from a wireless power transmission device to a wireless power reception device according to current and the state of charge of the battery.

이동이 자유로우면서 자율적으로 소정의 동작을 수행하는 AGV(Automatic Guided Vehicle) 및 로봇 등을 비롯한 각종 이동체들은 배터리를 내장하고, 내장한 배터리에 충전되어 있는 전력을 사용하여 부하들을 구동시키고 있다.Various mobile vehicles, including AGVs (Automatic Guided Vehicles) and robots that move freely and perform certain actions autonomously, have built-in batteries and drive loads using the power charged in the built-in batteries.

배터리에 저장되어 있는 충전전력량은 제한되어 있는 것으로서 충전전력이 방전되어 부하에 더 이상 전력을 공급하지 못할 경우에 배터리에는 다시 전력을 충전하여 부하에 전력을 공급할 수 있도록 해야 된다.The amount of charging power stored in the battery is limited, so if the charging power is discharged and no longer can supply power to the load, the battery must be recharged to supply power to the load.

전력을 공급하는 전력 송신장치와 전력 수신장치를 유선으로 연결하여 배터리에 전력을 충전시킬 수 있다.You can charge the battery by connecting the power transmitter and power receiver that supply power with a wire.

그러나 전력 송신장치와 전력 수신장치를 유선으로 연결하여 배터리에 전력을 충전시키는 것은 구성이 간단한 반면에 작업자가 일일이 전력 송신장치와 전력 수신장치를 유선으로 연결하는 작업을 수행해야 되는 것으로서 많은 번거로움이 있다.However, while charging power to the battery by connecting the power transmitting device and the power receiving device by wire is simple in configuration, it is inconvenient because the worker must perform the task of connecting the power transmitting device and the power receiving device by wire one by one. there is.

그러므로 무선전력 송신장치가 무선으로 전력을 전송하고, 전송하는 전력을 무선전력 수신장치가 수신하여 배터리에 전력을 충전시키는 무선전력 전송장치가 개발 및 널리 사용되고 있다.Therefore, wireless power transmission devices in which a wireless power transmission device transmits power wirelessly, and a wireless power reception device receives the transmitted power to charge the battery, have been developed and are widely used.

상기 무선전력 전송장치는 자기유도방식의 기술과, 전력 송신코일 및 전력 수신코일의 공진주파수를 일치시키는 기술을 이용하는 것이다. 즉, 무선전력 송신장치에 구비되는 전력 송신코일과 무선전력 수신장치에 구비되는 전력 수신코일을 무선 전송하는 전력의 주파수에 공진시킨다. 그리고 상기 전력 송신코일 및 상기 전력 수신코일을 근거리에서 유도 결합시켜 높은 효율로 전력을 전송할 수 있는 것이다.The wireless power transmission device uses magnetic induction technology and technology to match the resonance frequencies of the power transmission coil and the power reception coil. That is, the power transmission coil provided in the wireless power transmitting device and the power receiving coil provided in the wireless power receiving device are resonated at the frequency of the wirelessly transmitted power. In addition, power can be transmitted with high efficiency by inductively coupling the power transmitting coil and the power receiving coil at a short distance.

무선전력 송신장치에서 무선전력 수신장치로 전력을 무선 전송하는 선행기술로서는 대한민국 등록특허 제10-1741759호(2017. 05. 24. 등록)를 비롯하여 여러 가지의 기술이 알려져 있다.As a prior art for wirelessly transmitting power from a wireless power transmitter to a wireless power receiver, several technologies are known, including Republic of Korea Patent No. 10-1741759 (registered on May 24, 2017).

상기한 선행기술은, 무선으로 전력을 수신하여 배터리를 충전하는 무선충전 수신장치로서, 충전상태 추정부가 배터리의 초기 충전상태를 추정하고, 충전 송신장치가 무선 전송하는 충전전력을 충전부가 수신하여 배터리에 충전하며, 배터리에 전력을 충전하면서 제어부가, 충전전류의 값을 측정하고 측정한 충전전류의 값에 따라 제어신호를 생성하여 충전전력의 증감을 제어하면서 통신부를 통해 배터리의 초기 충전 상태와 제어신호를 충전 송신장치에 전송하게 하고 있다.The above prior art is a wireless charging receiver that charges a battery by receiving power wirelessly. The charging state estimation unit estimates the initial charging state of the battery, and the charging unit receives the charging power wirelessly transmitted by the charging transmitting device to charge the battery. While charging power to the battery, the control unit measures the value of the charging current and generates a control signal according to the measured value of the charging current to control the increase/decrease of the charging power, and controls the initial charging state of the battery through the communication unit. The signal is transmitted to the charging transmitter.

이러한 선행기술에 따르면, 미리 규정되어 있는 정격 충전전압 및 정격 충전전류의 배터리를 구비하고 있는 무선충전 수신장치에, 무선충전 송신장치가 효율적으로 전력을 전송하여 배터리에 전력을 충전하도록 할 수 있다.According to this prior art, a wireless charging transmitting device can efficiently transmit power to a wireless charging receiving device equipped with a battery with a predefined rated charging voltage and rated charging current to charge the battery.

그러나 무선충전 송신장치에 규정되어 있는 정격 충전전압 및 정격 충전전류와는 상이한 충전전압 및 충전전류를 요구하는 배터리의 무선충전 수신장치에는, 무선충전 송신장치가 효율적으로 전력을 전송하지 못하였다.However, the wireless charging transmitting device did not transmit power efficiently to the wireless charging receiving device for the battery that requires a charging voltage and charging current that are different from the rated charging voltage and charging current specified in the wireless charging transmitting device.

즉, 무선충전 송신장치에 규정되어 있는 정격 충전전압과는 상이한, 충전전압을 요구하는 배터리를 구비하고 있는 무선전력 수신장치에는 무선 전송하는 전력의 전압이 너무 낮아 충전하지 못하거나 또는 전압이 너무 높아 화제 등의 안전사고가 발생할 수 있다.In other words, in a wireless power receiving device equipped with a battery that requires a charging voltage different from the rated charging voltage specified in the wireless charging transmitting device, the voltage of the wirelessly transmitted power may be too low to charge, or the voltage may be too high. Safety accidents such as fire may occur.

또한 무선충전 송신장치에 규정되어 있는 정격 충전전류와는 상이한, 충전전류를 요구하는 배터리를 구비하고 있는 무선전력 수신장치에는 무선 전송하는 전력의 전류가 너무 낮아 충전하는데 많은 시간이 소요되거나 또는 과전류로 인한 화제 등의 안전사고가 발생할 수 있다.Additionally, in a wireless power receiving device equipped with a battery that requires a charging current that is different from the rated charging current specified in the wireless charging transmitting device, the current of the wirelessly transmitted power is too low, so it takes a lot of time to charge, or it takes a long time to charge due to overcurrent. Safety accidents, such as fire, may occur.

대한민국 등록특허 제10-1741759호(2017. 05. 24. 등록)Republic of Korea Patent No. 10-1741759 (registered on May 24, 2017)

본 발명이 해결하고자 하는 과제는 무선충전 수신장치에 구비되어 있는 배터리의 정격 충전전압 및 정격 충전전류에 따라 무선충전 송신장치가 효율적으로 전력을 전송할 수 있는 무선충전 전송장치 및 방법을 제공한다.The problem to be solved by the present invention is to provide a wireless charging transmission device and method that allows the wireless charging transmitting device to efficiently transmit power according to the rated charging voltage and rated charging current of the battery provided in the wireless charging receiving device.

또한 본 발명이 해결하고자 하는 과제는 무선충전 송신장치가 무선충전 수신장치와 근거리 통신을 수행하여, 무선충전 수신장치에 구비되어 있는 배터리의 정격 충전전압 및 정격 충전전류에 대한 정보를 취득하고 취득한 정보에 따른 전력을 무선충전 송신장치가 생성하여 무선충전 수신장치로 전송하는 무선충전 전송장치 및 방법을 제공한다.In addition, the problem to be solved by the present invention is that the wireless charging transmitting device performs short-distance communication with the wireless charging receiving device to obtain information about the rated charging voltage and rated charging current of the battery provided in the wireless charging receiving device. Provides a wireless charging transmission device and method in which the wireless charging transmission device generates power according to and transmits it to the wireless charging reception device.

또한 본 발명이 해결하고자 하는 과제는 무선충전 수신장치에 구비되어 있는 배터리의 전력 충전상태에 따라 효율적으로 전력을 전송할 수 있는 무선충전 전송장치 및 방법을 제공한다.In addition, the problem to be solved by the present invention is to provide a wireless charging transmission device and method that can efficiently transmit power according to the power charge state of the battery provided in the wireless charging receiver.

또한 본 발명이 해결하고자 하는 과제는 상기에서 언급한 과제들로 제한되지 않고, 언급되지 않은 또 다른 과제들은 아래의 기재들로부터 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에 의하여 명확하게 이해될 수 있을 것이다.In addition, the problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned can be clearly understood by those skilled in the art from the description below. It could be.

본 발명의 무선충전 전송장치는, 상용 교류전력을 직류전력으로 변환하는 직류전력 변환부와, 상기 직류전력 변환부가 변환한 직류전력을 스위칭시켜 교류전력으로 변환하는 스위칭부와, 상기 스위칭부가 변환한 교류전력을 무선전력 수신장치로 무선 전송하는 전력 송신부와, 상기 무선전력 수신장치와 근거리 통신을 수행하여 배터리의 정격 충전전압 및 정격 충전전류를 포함한 정보와 배터리의 전력 충전상태 정보를 취득하는 통신부와, 상기 통신부를 통해 취득한, 배터리의 정격 충전전압 및 정격 충전전류를 포함한 정보와 배터리의 전력 충전상태 정보에 따라 상기 직류전력 변환부와 상기 스위칭부를 제어하여 상기 전력 송신부에서 전송되는 전력을 제어하는 제어부를 포함할 수 있다.The wireless charging transmission device of the present invention includes a DC power conversion unit that converts commercial AC power into DC power, a switching unit that switches the DC power converted by the DC power conversion unit and converts it into AC power, and the switching unit converts the converted DC power into AC power. A power transmitter that wirelessly transmits alternating current power to a wireless power receiver, and a communication unit that performs short-distance communication with the wireless power receiver to acquire information including the rated charging voltage and rated charging current of the battery and power charge state information of the battery; , a control unit that controls the power transmitted from the power transmitter by controlling the DC power converter and the switching unit according to information including the rated charging voltage and rated charging current of the battery and the power charge state information of the battery, acquired through the communication unit. may include.

그리고 본 발명의 무선충전 전송방법은, 제어부가 통신부를 통해 무선전력 수신장치와 근거리 통신을 수행하여 배터리의 정격 충전전압 및 정격 충전전류를 포함한 정보를 취득하는 단계와, 상기 제어부가 상기 배터리의 정격 충전전압 및 정격 충전전류를 포함한 정보에 따라 직류전력 변환부 및 스위칭부를 제어하여 무선 전송되는 전력을 조절하는 단계와, 상기 무선 전송되는 전력을 상기 무선전력 수신장치가 배터리에 충전하면서 배터리의 충전정보를 검출하여 상기 제어부로 전송하는 단계와, 상기 제어부가 상기 배터리의 충전정보에 따라 직류전력 변환부 및 스위칭부를 제어하여 무선 전송되는 전력을 조절하는 단계를 포함할 수 있다.In addition, the wireless charging transmission method of the present invention includes the steps of a control unit performing short-distance communication with a wireless power receiver through a communication unit to acquire information including the rated charging voltage and rated charging current of the battery, and the control unit performing short-distance communication with a wireless power receiving device through a communication unit. A step of controlling wirelessly transmitted power by controlling a direct current power converter and a switching unit according to information including charging voltage and rated charging current, and the wireless power receiving device charges the wirelessly transmitted power to a battery and provides charging information of the battery. It may include a step of detecting and transmitting to the control unit, and a step of the control unit controlling the DC power converter and the switching unit according to the charging information of the battery to adjust the wirelessly transmitted power.

상기 제어부가 상기 배터리의 정격 충전전압 및 정격 충전전류를 포함한 정보에 따라 직류전력 변환부 및 스위칭부를 제어하여 무선 전송되는 전력을 조절하는 단계와, 상기 제어부가 상기 배터리의 충전정보에 따라 직류전력 변환부 및 스위칭부를 제어하여 무선 전송되는 전력을 조절하는 단계는, 상기 제어부가 상기 스위칭부의 스위칭 위상을 조절하는 단계를 포함할 수 있다.The control unit adjusts wirelessly transmitted power by controlling a direct current power converter and a switching unit according to information including the rated charging voltage and rated charging current of the battery, and the control unit converts direct current power according to the charging information of the battery. The step of controlling wirelessly transmitted power by controlling the unit and the switching unit may include the control unit adjusting the switching phase of the switching unit.

본 발명의 무선충전 전송장치 및 방법에 따르면, 무선전력 송신장치가 무선전력 수신장치와 근거리 통신을 수행하여 배터리의 정격 충전전압 및 정격 충전전류를 포함하는 정보를 취득하고, 취득한 배터리의 정격 충전전압 및 정격 충전전류를 포함하는 정보에 따라 무선전력 송신장치가 무선전력 수신장치로 전력을 전송하게 한다.According to the wireless charging transmission device and method of the present invention, the wireless power transmission device performs short-distance communication with the wireless power reception device to acquire information including the rated charging voltage and rated charging current of the battery, and the acquired rated charging voltage of the battery. and causes the wireless power transmitting device to transmit power to the wireless power receiving device according to information including the rated charging current.

그러므로 배터리에 전력을 원활하게 충전시킬 수 있고, 또한 과전류 또는 과전압 등으로 인한 안전사고의 발생을 미연에 방지할 수 있다.Therefore, power can be smoothly charged to the battery, and safety accidents due to overcurrent or overvoltage can be prevented in advance.

이하에서는 첨부된 도면들을 참조하여 본 발명을 한정하지 않는 실시 예를 통해 본 발명을 보다 상세히 설명하며, 일부 도면에서 동일한 요소에 대해서는 동일한 부호를 부여한다.
도 1은 일반적인 무선 전력전송 시스템의 개략적인 구성을 보인 도면,
도 2는 본 발명의 무선전력 송신장치의 구성을 보인 블록도, 및
도 3은 본 발명의 무선전력 전송방법에 따른 제어부의 동작을 보인 신호흐름도이다.Hereinafter, the present invention will be described in more detail through examples that do not limit the present invention with reference to the accompanying drawings, and like elements in some drawings will be assigned the same reference numerals.
1 is a diagram showing the schematic configuration of a general wireless power transmission system;
Figure 2 is a block diagram showing the configuration of the wireless power transmission device of the present invention, and
Figure 3 is a signal flow diagram showing the operation of the control unit according to the wireless power transmission method of the present invention.

이하의 상세한 설명은 예시에 지나지 않으며, 본 발명의 실시 예를 도시한 것에 불과하다. 또한 본 발명의 원리와 개념은 가장 유용하고, 쉽게 설명할 목적으로 제공된다.The detailed description below is merely illustrative and merely illustrates an embodiment of the present invention. Additionally, the principles and concepts of the present invention are provided for the purpose of being most useful and easily explained.

따라서 본 발명의 기본 이해를 위한 필요 이상의 자세한 구조를 제공하고자 하지 않았음은 물론 통상의 지식을 가진 자가 본 발명의 실체에서 실시될 수 있는 여러 가지의 형태들을 도면을 통해 예시한다.Therefore, it is not intended to provide a more detailed structure than necessary for a basic understanding of the present invention, and various forms that can be implemented in the substance of the present invention by those skilled in the art are illustrated through the drawings.

도 1은 일반적인 무선 전력전송 시스템의 개략적인 구성을 보인 도면이다. 여기서, 부호 100은 무선으로 전력을 전송하는 무선전력 송신장치이고, 부호 200은 무선으로 전력을 수신하는 무선전력 수신장치이다.Figure 1 is a diagram showing the schematic configuration of a general wireless power transmission system. Here, symbol 100 is a wireless power transmission device that transmits power wirelessly, and symbol 200 is a wireless power reception device that receives power wirelessly.

상기 무선전력 송신장치(100)는 예를 들면, 소정의 충전장소에 고정 설치될 수 있는 것으로서 무선전력 공급부(110)와, 전력 송신코일(120)을 포함하여 구성될 수 있다.For example, the wireless power transmission device 100 can be fixedly installed at a predetermined charging location and may include a wireless power supply unit 110 and a power transmission coil 120.

상기 무선전력 공급부(110)는 무선으로 전송할 소정 주파수의 교류전력을 공급하고, 상기 무선전력 공급부(110)가 공급하는 소정 주파수의 교류전력에 상기 전력 송신코일(120)이 공진되어, 상기 소정 주파수의 교류전력을 외부로 전송한다.The wireless power supply unit 110 supplies AC power of a predetermined frequency to be transmitted wirelessly, and the power transmission coil 120 resonates with the AC power of a predetermined frequency supplied by the wireless power supply unit 110, and the power transmission coil 120 resonates at the predetermined frequency. Transmits AC power to the outside.

상기 무선전력 수신장치(200)는, 예를 들면, AGV 또는 로봇 등과 같은 소정의 이동체에 설치될 수 있는 것으로서 전력 수신코일(210), 수신전력 충전부(220) 및 배터리(230)를 포함하여 구성될 수 있다.The wireless power receiving device 200 can be installed on a certain moving object, such as an AGV or a robot, and includes a power receiving coil 210, a receiving power charging unit 220, and a battery 230. It can be.

상기 이동체가, 무선전력 송신장치(100)가 고정 설치되어 있는 소정의 충전장소의 충전위치에 위치할 경우에 상기 전력 수신코일(210)이 상기 전력 송신코일(120)과 유도 결합된다. 그러면, 상기 전력 송신코일(120)이 전송하는 소정 주파수의 교류전력이 상기 전력 수신코일(210)로 유도된다.When the mobile object is located at a charging position in a predetermined charging location where the wireless power transmitting device 100 is fixedly installed, the power receiving coil 210 is inductively coupled to the power transmitting coil 120. Then, the alternating current power of a predetermined frequency transmitted by the power transmission coil 120 is induced to the power reception coil 210.

상기 전력 수신코일(210)로 유도된 교류전력은 수신전력 충전부(220)에서 직류전력으로 변환되고, 변환된 직류전력은 배터리(230)에 충전된 후 이동체에 구비되어 있는 전기적 부하에 동작전력으로 공급된다.The alternating current power induced in the power receiving coil 210 is converted into direct current power in the receiving power charging unit 220, and the converted direct current power is charged in the battery 230 and then used as operating power for the electrical load provided in the moving object. supplied.

도 2는 본 발명의 무선전력 송신장치의 구성을 보인 블록도이다. 도 2를 참조하면, 본 발명에 따른 무선전력 송신장치(100)는 상용 교류전력(310)을 직류전력으로 변환하는 직류전력 변환부(320)와, 상기 직류전력 변환부(320)가 변환한 직류전력을 스위칭시켜 교류전력으로 변환하는 스위칭부(330)와, 상기 스위칭부(330)가 변환한 교류전력을 무선전력 수신장치(200)로 무선 전송하는 전력 송신부(340)와, 상기 무선전력 수신장치(200)와 근거리 통신을 수행하여 배터리(230)에 대한 정보와 배터리(230)의 전력 충전상태 등의 정보를 취득하는 통신부(350)와, 상기 통신부(350)를 통해 취득한 정보에 따라 상기 직류전력 변환부(320)와 상기 스위칭부(330)를 제어하여 요구되는 전력이 전력 송신부(340)를 통해 상기 무선전력 수신장치(200)로 무선 전송되게 제어하는 제어부(360)를 포함할 수 있다.Figure 2 is a block diagram showing the configuration of the wireless power transmission device of the present invention. Referring to FIG. 2, the wireless power transmission device 100 according to the present invention includes a direct current power converter 320 that converts commercial AC power 310 into direct current power, and the converted direct current power converter 320. A switching unit 330 that switches DC power and converts it into AC power, a power transmitter 340 that wirelessly transmits the AC power converted by the switching unit 330 to the wireless power receiver 200, and the wireless power A communication unit 350 that performs short-distance communication with the receiving device 200 to obtain information about the battery 230 and the power charge state of the battery 230, and according to the information acquired through the communication unit 350, It may include a control unit 360 that controls the DC power converter 320 and the switching unit 330 to wirelessly transmit the required power to the wireless power receiver 200 through the power transmitter 340. You can.

이러한 구성을 가지는 무선전력 송신장치(100)는 무선전력 수신장치(200)로 전력을 전송하기 전에 먼저 제어부(360)가 통신부(350)를 통해 무선전력 수신장치(200)와 통신을 수행하여 무선전력 수신장치(200)에 구비되어 있는 배터리(230)의 정보를 취득한다.The wireless power transmitter 100 having this configuration has the control unit 360 first communicate with the wireless power receiver 200 through the communication unit 350 before transmitting power to the wireless power receiver 200. Information on the battery 230 provided in the power receiving device 200 is acquired.

상기 제어부(360)가 취득하는 배터리(230)의 정보에는 배터리(230)의 정격 충전전압 및 정격 충전전류를 포함할 수 있다.The information about the battery 230 acquired by the control unit 360 may include the rated charging voltage and rated charging current of the battery 230.

상기 제어부(360)는, 상기 배터리(230)의 정보가 취득되면, 직류전력 변환부(320)를 제어하여, 상용 교류전력(310)을 직류전력으로 변환하게 제어한다.When information on the battery 230 is acquired, the control unit 360 controls the DC power converter 320 to convert commercial AC power 310 into DC power.

이 때, 상기 제어부(360)는 상기 직류전력 변환부(320)가 변환하는 직류전력의 전압 레벨이, 상기 배터리(230)의 정격 충전전압의 레벨로 되게 제어한다.At this time, the control unit 360 controls the voltage level of the DC power converted by the DC power converter 320 to be the level of the rated charging voltage of the battery 230.

그리고 상기 제어부(360)는 스위칭 신호를 발생하고, 발생한 스위칭 신호에 따라 스위칭부(330)가 상기 직류전력 변환부(320)에서 변환된 직류전력을 스위칭하여 교류전력으로 변환하게 된다.Then, the control unit 360 generates a switching signal, and the switching unit 330 switches the DC power converted by the DC power converter 320 and converts it into AC power according to the generated switching signal.

여기서, 상기 스위칭부(330)는 예를 들면, 복수 개의 IGBT(Insulated Gate Bipolar Transistor) 등과 같은 스위칭 소자들이 브리지 결합되어 있는 것으로서 제어부(360)가 출력하는 소정 주파수의 스위칭 신호에 따라 상기 복수 개의 스위칭 소자들이 선택적으로 스위칭되면서, 상기 직류전력 변환부(320)에서 출력되는 직류전력을 스위칭하여 주파수의 교류전력을 생성한다.Here, the switching unit 330 is a bridge-coupled unit of a plurality of switching elements such as, for example, IGBT (Insulated Gate Bipolar Transistor), and switches the plurality of switching elements according to a switching signal of a predetermined frequency output by the control unit 360. As the elements are selectively switched, the direct current power output from the direct current power converter 320 is switched to generate alternating current power of a frequency.

그리고 상기 제어부(360)는 상기 배터리(230)의 정격 충전전류의 레벨에 따라 상기 스위칭부(330)의 스위칭 위상을 제어하여, 스위칭부(330)에서 배터리(230)의 정격 충전전류의 레벨에 따른 전류의 교류전력이 출력되게 한다.And the control unit 360 controls the switching phase of the switching unit 330 according to the level of the rated charging current of the battery 230, so that the switching unit 330 adjusts the level of the rated charging current of the battery 230 to the level of the rated charging current of the battery 230. It causes alternating current power to be output.

상기 스위칭부(330)에서 출력되는 교류전력 즉, 상기 배터리(230)의 정격 충전전압의 레벨에 따른 전압과, 상기 배터리(230)의 정격 충전전류의 레벨에 따른 전류를 가지는 교류전력은 전력 송신부(340)로 입력되어 무선전력 수신장치(200)로 무선 전송된다.The AC power output from the switching unit 330, that is, the AC power having a voltage according to the level of the rated charging voltage of the battery 230 and a current according to the level of the rated charging current of the battery 230, is generated by the power transmitting unit. It is input at 340 and wirelessly transmitted to the wireless power receiving device 200.

여기서, 상기 전력 송신부(340)는 예를 들면, 커패시터(342) 및 전력 송신코일(120)이 직렬 연결되어 상기 스위칭부(330)에서 출력되는 교류전력의 주파수에 공진되는 것으로서 상기 전력 송신코일(120)은 최적의 상태로 전력을 무선 전송하게 된다.Here, the power transmission unit 340 is, for example, a capacitor 342 and a power transmission coil 120 connected in series to resonate at the frequency of the alternating current power output from the switching unit 330, and the power transmission coil ( 120) transmits power wirelessly in optimal conditions.

이와 같이 하여 전력 송신부(340)가 무선으로 전력을 전송하고, 이를 무선전력 수신장치(200)가 수신하여 배터리(230)에 충전시키는 상태에서 무선전력 수신장치(200)가 배터리(230)의 충전전압 및 충전전류를 검출하고, 검출한 충전전압 및 충전전류를 포함하는 충전정보를 무선전력 송신장치(100)로 전송한다.In this way, the power transmitter 340 transmits power wirelessly, and the wireless power receiver 200 receives it and charges the battery 230, and the wireless power receiver 200 charges the battery 230. The voltage and charging current are detected, and charging information including the detected charging voltage and charging current is transmitted to the wireless power transmission device 100.

상기 무선전력 송신장치(100)는 상기 무선전력 송신장치(100)가 송신하는 충전정보를 통신부(350)가 수신하여 제어부(360)로 입력시킨다.The wireless power transmission device 100 receives the charging information transmitted by the wireless power transmission device 100 and inputs it to the control unit 360.

그러면, 상기 제어부(360)는 충전정보에 따라 직류전력 변환부(320) 및 스위칭부(330)를 제어하여 상기 배터리(230)에 전력을 만충전시키도록 전력을 전송한다.Then, the control unit 360 controls the DC power converter 320 and the switching unit 330 according to the charging information to transmit power to fully charge the battery 230.

도 3은 본 발명의 무선전력 전송방법에 따른 제어부의 동작을 보인 신호흐름도이다.Figure 3 is a signal flow diagram showing the operation of the control unit according to the wireless power transmission method of the present invention.

도 3을 참조하면, 제어부(360)는 통신부(350)를 통해 전력 수신장치(200)와 통신을 수행하면서 전력을 전송할 조건을 만족하는지의 여부를 판단한다(S300).Referring to FIG. 3, the control unit 360 determines whether the conditions for transmitting power are satisfied while communicating with the power receiving device 200 through the communication unit 350 (S300).

즉, 상기 제어부(360)는 상기 전력 수신장치(200)와 통신을 수행하여 이동체가 충전장소의 충전 정위치에 위치하고, 전력의 전송을 요청하는지 등의 여부를 판단한다.That is, the control unit 360 communicates with the power receiving device 200 to determine whether the mobile object is located at the charging position of the charging station and requests transmission of power.

전송조건을 만족할 경우에 상기 제어부(360)는 통신부(350)를 통해 배터리(230)의 정보를 취득한다(S302).When the transmission conditions are met, the control unit 360 acquires information about the battery 230 through the communication unit 350 (S302).

그리고 상기 제어부(360)는 취득한 배터리(230)의 정보 즉, 배터리(230)의 정격 충전전압과 정격 충전전류에 따라 직류전력 변환부(320) 및 스위칭부(330)를 제어하여 배터리(230)의 정격 충전전압과 정격 충전전류에 따른 교류전력을 생성하고, 생성한 교류전력은 전력 송신부(340)를 통해 무선전력 수신장치(200)로 무선 전송된다(S304).And the control unit 360 controls the DC power converter 320 and the switching unit 330 according to the acquired information about the battery 230, that is, the rated charging voltage and the rated charging current of the battery 230 to control the battery 230. AC power is generated according to the rated charging voltage and rated charging current, and the generated AC power is wirelessly transmitted to the wireless power receiver 200 through the power transmitter 340 (S304).

이와 같은 상태에서 상기 제어부(360)는 무선전력 수신장치(200)가 전송하는 배터리(230)의 충전정보를 통신부(350)를 통해 획득하고(S306), 획득한 충전정보로 배터리(230)의 충전이 완료되었는지의 여부를 판단한다(S308).In this state, the control unit 360 acquires the charging information of the battery 230 transmitted by the wireless power receiving device 200 through the communication unit 350 (S306), and uses the obtained charging information to charge the battery 230. It is determined whether charging is complete (S308).

상기 배터리(230)의 전력 충전이 완료되지 않았을 경우에 상기 제어부(360)는 상기 충전정보에 따라 직류전력 변환부(320) 및 스위칭부(330)를 제어하여, 상기 배터리(230)의 현재 전력 충전상태에 따른 전력이 전송되게 한다(S310).When the power charging of the battery 230 is not completed, the control unit 360 controls the DC power converter 320 and the switching unit 330 according to the charging information to determine the current power of the battery 230. Power is transmitted according to the charging state (S310).

그리고 상기 제어부(360)는 상기 배터리(230)의 전력 충전이 완료되었음이 판단될 경우에 전력의 전송동작을 정지한다(S312).And the control unit 360 stops the power transmission operation when it is determined that the power charging of the battery 230 is complete (S312).

이상에서는 대표적인 실시 예를 통하여 본 발명에 대하여 상세하게 설명하였으나, 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자는 상술한 실시 예에 대하여 본 발명의 범주에서 벗어나지 않는 한도 내에서 다양한 변형이 이루어질 수 있도록 각 실시 예들의 전부 또는 일부가 선택적으로 조합되어 구성될 수도 있다.In the above, the present invention has been described in detail through representative embodiments, but those skilled in the art may make various modifications to the above-described embodiments without departing from the scope of the present invention. All or part of each embodiment may be selectively combined to allow for configuration.

그러므로 본 발명의 권리범위는 설명된 실시 예에 국한되어 정해져서는 안 되며, 후술하는 청구범위뿐만 아니라 이 청구범위와 균등한 것들에 의해 정해져야 한다.Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims described below but also by equivalents to these claims.

100 : 무선전력 송신장치 110 : 무선전력 공급부
120 : 전력 송신코일 200 : 무선전력 수신장치
210 : 전력 수신코일 220 : 수신전력 충전부
230 : 배터리 310 : 상용 교류전력
320 : 직류전력 변환부 330 : 스위칭부
340 : 전력 송신부 342 : 커패시터
350 : 통신부 360 : 제어부100: wireless power transmission device 110: wireless power supply unit
120: Power transmission coil 200: Wireless power reception device
210: power receiving coil 220: receiving power charging unit
230: Battery 310: Commercial AC power
320: DC power conversion unit 330: Switching unit
340: power transmitter 342: capacitor
350: Communication unit 360: Control unit

Claims (3)

무선으로 전력을 송신하는 무선전력 송신장치 및 상기 무선전력 송신장치에서 송신되는 무선 전력을 수신하여 배터리를 충전하는 무선전력 수신장치를 포함하는 무선전력 충전 시스템에 있어서,
상기 무선전력 송신장치는,
상용 교류전력을 직류전력으로 변환하는 직류전력 변환부;
상기 직류전력 변환부가 변환한 직류전력을 스위칭시켜 교류전력으로 변환하는 스위칭부;
상기 스위칭부가 변환한 교류전력을 무선전력 수신장치로 무선 전송하는 전력 송신부;
상기 무선전력 수신장치와 근거리 통신을 수행하여 무선전력을 송신하기 이전에 배터리의 정격 충전전압 및 정격 충전전류 정보를 포함하는 배터리 정보와, 무선전력을 송신을 시작한 후 배터리의 전력 충전상태 정보를 취득하는 통신부; 및
상기 통신부를 통해 취득한, 배터리의 정격 충전전압 및 정격 충전전류를 포함한 배터리 정보와 배터리의 전력 충전상태 정보에 따라 상기 직류전력 변환부와 상기 스위칭부를 제어하여 상기 전력 송신부에서 전송되는 전력을 제어하는 제어부;를 포함하되,
상기 제어부는 상기 배터리의 정격 충전전압 및 정격 충전전류를 포함한 배터리 정보가 취득되면, 직류전력 변환부를 제어하여 상용 교류전력을 직류전력으로 변환하게 제어하여 상기 직류전력 변환부에서 변환하는 직류전력의 전압 레벨이 상기 배터리의 정격 충전전압의 레벨이 되도록 제어하고, 상기 제어부는 소정 주파수의 스위칭 신호를 스위칭부에 발생하고, 발생한 스위칭 신호에 따라 스위칭부가 상기 직류전력 변환부에서 변환된 직류전력을 스위칭하여 교류전력으로 변환시키되, 상기 스위칭부는 복수 개의 IGBT(Insulated Gate Bipolar Transistor)를 포함하는 스위칭 소자들이 브리지 결합되어 구성되어 제어부가 출력하는 소정 주파수의 스위칭 신호에 따라 상기 복수 개의 스위칭 소자들이 선택적으로 스위칭되면서, 상기 직류전력 변환부에서 출력되는 직류전력을 스위칭하여 소정 주파수의 교류전력을 생성하고,
상기 제어부는 상기 배터리의 정격 충전전류의 레벨에 따라 상기 스위칭부의 스위칭 위상을 제어하여, 스위칭부에서 배터리의 정격 충전전류의 레벨에 따른 전류의 교류전력이 출력하도록 동작하고,
상기 전력 송신부는 커패시터 및 전력 송신코일이 직렬 연결되어 상기 스위칭부에서 출력되는 교류전력의 주파수에 공진되도록 구성되어 있으며,
상기 무선전력 송신부가 무선으로 전력을 전송하고, 무선 송신된 전력을 무선전력 수신장치가 수신하여 무선전력 수신장치는 수신된 전력을 이용하여 배터리를 충전시키는 상태에서 무선전력 수신장치는 배터리의 충전전압 및 충전전류를 검출하고, 검출한 충전전압 및 충전전류를 포함하는 충전정보를 무선전력 송신장치로 전송하고, 상기 제어부는 수신된 배터리 충전 상태 정보에 기반하여 상기 직류전력 변환부와 상기 스위칭부를 제어하여 상기 전력 송신부에서 전송되는 전력을 제어하는 특징으로 하는
무선전력 전송장치.
A wireless power charging system comprising a wireless power transmitter that transmits power wirelessly and a wireless power receiver that receives wireless power transmitted from the wireless power transmitter to charge a battery,
The wireless power transmission device,
A direct current power converter that converts commercial alternating current power into direct current power;
A switching unit that switches the DC power converted by the DC power conversion unit and converts it into AC power;
a power transmission unit that wirelessly transmits the AC power converted by the switching unit to a wireless power receiver;
Perform short-distance communication with the wireless power receiver to acquire battery information including the battery's rated charging voltage and rated charging current information before transmitting wireless power, and battery power charge status information after starting to transmit wireless power. Ministry of Communications; and
A control unit that controls the power transmitted from the power transmitter by controlling the DC power converter and the switching unit according to battery information including the rated charging voltage and rated charging current of the battery and the power charge state information of the battery acquired through the communication unit. Including ;,
When battery information including the rated charging voltage and rated charging current of the battery is acquired, the control unit controls the DC power converter to convert commercial AC power into DC power, and controls the voltage of the DC power converted by the DC power converter. The level is controlled to be the level of the rated charging voltage of the battery, the control unit generates a switching signal of a predetermined frequency in the switching unit, and according to the generated switching signal, the switching unit switches the DC power converted in the DC power converter. It is converted into alternating current power, and the switching unit is configured by bridge-coupling switching elements including a plurality of IGBTs (Insulated Gate Bipolar Transistors), and the plurality of switching elements are selectively switched according to a switching signal of a predetermined frequency output by the control unit. , generating alternating current power of a predetermined frequency by switching the direct current power output from the direct current power converter,
The control unit controls the switching phase of the switching unit according to the level of the rated charging current of the battery, so that the switching unit outputs alternating current power according to the level of the rated charging current of the battery,
The power transmission unit is configured to have a capacitor and a power transmission coil connected in series to resonate at the frequency of the alternating current power output from the switching unit,
In a state where the wireless power transmitter transmits power wirelessly, the wireless power receiver receives the wirelessly transmitted power, and the wireless power receiver uses the received power to charge the battery, the wireless power receiver uses the charging voltage of the battery. and detecting the charging current and transmitting charging information including the detected charging voltage and charging current to the wireless power transmitter, and the control unit controls the DC power converter and the switching unit based on the received battery charging state information. Characterized by controlling the power transmitted from the power transmitter
Wireless power transmission device.
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Citations (2)

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WO2015141554A1 (en) * 2014-03-18 2015-09-24 株式会社Ihi Power supply device and non-contact power supply system
JP2021010250A (en) 2019-07-02 2021-01-28 トヨタ自動車株式会社 Vehicle, car navigation system, and information providing apparatus

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KR101253670B1 (en) * 2011-09-05 2013-04-11 엘에스전선 주식회사 Apparatus for wireless power transmission using multi antenna and Method for controlling thereof
KR102175599B1 (en) * 2014-01-24 2020-11-06 엘지이노텍 주식회사 Wireless Power Transfer System
KR101741759B1 (en) 2016-05-13 2017-06-16 한국과학기술원 Method And Apparatus for Adaptive Fast Wireless Charging

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WO2015141554A1 (en) * 2014-03-18 2015-09-24 株式会社Ihi Power supply device and non-contact power supply system
JP2021010250A (en) 2019-07-02 2021-01-28 トヨタ自動車株式会社 Vehicle, car navigation system, and information providing apparatus

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