WO2014176872A1 - 无线电能传输系统的功率调节方法及系统 - Google Patents

无线电能传输系统的功率调节方法及系统 Download PDF

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Publication number
WO2014176872A1
WO2014176872A1 PCT/CN2013/085452 CN2013085452W WO2014176872A1 WO 2014176872 A1 WO2014176872 A1 WO 2014176872A1 CN 2013085452 W CN2013085452 W CN 2013085452W WO 2014176872 A1 WO2014176872 A1 WO 2014176872A1
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Prior art keywords
transmission system
power transmission
wireless power
power
information
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PCT/CN2013/085452
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English (en)
French (fr)
Inventor
李聃
李明
龙海岸
孙伟
鄢海峰
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海尔集团技术研发中心
海尔集团公司
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Publication of WO2014176872A1 publication Critical patent/WO2014176872A1/zh

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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
    • H02J50/80—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

Definitions

  • the present invention relates to the field of radio energy transmission technologies, and in particular, to a power adjustment method and system for a radio energy transmission system.
  • Wireless power transmission also known as contact s power transmission (CPT)
  • CPT contact s power transmission
  • the coupled power transfer technology transfers energy to the load in a non-contact manner by electromagnetic coupling. The principle is shown in Figure 1.
  • the radio energy transmission system is divided into two parts: the transmitting end (primary side) circuit and the receiving end (secondary side) circuit.
  • the transmitting end circuit mainly performs the conversion and transmission of electric energy
  • the receiving end circuit mainly performs the energy picking and voltage regulation.
  • the system uses the high-frequency magnetic field excited by the high-frequency current in the primary transmitting coil to cause electromagnetic induction to generate an induced voltage in the secondary side picking coil to complete the non-contact transmission of energy.
  • the transmission power of the transmitting end is adjusted according to the magnitude of the load power of the receiving end.
  • the resonance point of the system changes.
  • the transmitter gradually adjusts the resonance frequency and other parameters to match the receiving end to complete the power adjustment.
  • the transmitting power of the transmitting end is gradually approaching the rated power of the receiving end.
  • the adjustment time is long and cannot be adjusted to the rated power of the load immediately;
  • the object of the present invention is to provide a power adjustment method and system for a wireless power transmission system.
  • the transmitting end of the wireless energy transmission system directly switches to different power positions according to the communication information of different receiving ends, which greatly shortens the adjustment time and improves the system. control precision.
  • a power conditioning method for a wireless power transmission system comprising:
  • the receiving end of the radio energy transmission system transmits the communication information including the current load information to the transmitting end of the radio energy transmission system;
  • the transmitting end of the radio energy transmission system searches the index table for the power parameter corresponding to the load information
  • the transmitting end of the radio energy transmission system transmits power matching the power parameter to the receiving end of the radio energy transmission system.
  • a power conditioning system for a wireless power transmission system comprising:
  • a receiving end of the radio energy transmission system configured to send communication information to a transmitting end of the radio energy transmission system; and a wireless communication channel, configured to transmit the communication information;
  • the transmitting end of the radio energy transmission system specifically includes an index table setting unit, an index table searching unit, and a power switching unit, where
  • An index table setting unit configured to establish an index table of load information and power parameters
  • the index table searching unit is configured to search for a power parameter corresponding to the communication information in the index table, and the power switching unit is configured to switch to a power matching the receiving end of the wireless power transmission system according to the power parameter.
  • the invention establishes a communication channel in the wireless energy transmission system, and the receiving end sends its own relevant parameters and status information to the transmitting end through the communication channel, and the transmitting end adjusts the power according to different parameter information. In this way, the adjustment of the transmit power of the transmitting end can be achieved in one step, which greatly reduces the adjustment time of the system power and the error of the power adjustment.
  • FIG. 1 is a schematic diagram of the principle of a wireless power transmission system provided by the prior art
  • FIG. 2 is a flow chart of a power adjustment method of a wireless power transmission system according to Embodiment 1 of the present invention
  • Embodiment 3 is a flow chart showing the operation of the power adjustment system of the radio energy transmission system provided by Embodiment 2 of the present invention.
  • FIG. 5 is a block diagram showing the power adjustment system of the wireless power transmission system provided in Embodiment 4 of the present invention.
  • Fig. 2 is a flow chart showing a power adjustment method of a wireless power transmission system according to a first embodiment of the present invention.
  • step S 01 the receiving end of the wireless power transmission system transmits the communication information including the current load information to the transmitting end of the wireless power transmission system.
  • the load information includes: a class code of the load, a product model, gear position information, and status information.
  • the transmitting end of the radio energy transmission system and the receiving end of the radio energy transmission system establish a wireless communication channel for transmitting the load information.
  • step S102 the transmitting end of the radio energy transmission system searches the index table for the power parameter corresponding to the communication information.
  • an index table is established in the memory of the transmitting end, and the index table includes the type code of the receiving end, the power size, and other related information.
  • the transmitting end receives the communication information, the index table is queried, and the index table is found. Corresponding power parameters.
  • the transmitting end of the wireless power transmitting system transmits power matching the power parameter to the receiving end of the wireless power transmitting system.
  • Fig. 3 is a flow chart showing the operation of the power adjustment system of the radio energy transmission system provided by the second embodiment of the present invention.
  • step S201 the receiving end performs boot initialization.
  • step S202 the communication information is sent to the transmitting end.
  • the information communicated between the transmitting end and the receiving end mainly includes load category code, product model, gear position information and status information.
  • the load category code is mainly a large class representing the load, such as a mixer, a rice cooker, etc.; the product model represents the same Different models of the product may also represent different rated powers; the gear position information refers to the working state of the load, such as rice cooker, the power represented when it is in the cooking state and in the insulated state is also different; It mainly refers to the load fault information. When the load fails, the transmitter can be notified in time.
  • step S203 it is detected whether the working state changes
  • step S204 the gear position information code is transmitted to the transmitting end.
  • the communication information is sent to the transmitting end through the communication channel. Since the load is generally switched between different gear positions after the connection is established, only the transmitting information needs to be notified when the gear position information and the load size change. The end can be switched to the corresponding power.
  • the codes of the different receivers are different, and the codes sent by the same receiver due to the different power levels are different. When the power of the receiving end changes, the transmitting end will be notified in time to initiate the corresponding change.
  • step S205 the operating state is switched, and then the flow returns to step S203 to continue the loop.
  • Fig. 4 is a flow chart showing the operation of the power transmitting system of the radio energy transmission system provided by the third embodiment of the present invention.
  • Step S301 the transmitter is powered on and initialized.
  • Step S302 Receive communication information through a communication channel.
  • the foregoing communication information includes a category code of the load, a product model number, gear position information, and status information.
  • the transmitting end of the radio energy transmission system establishes an index table of load information and power parameters.
  • Step S304 Adjust the transmit power to match the working power of the receiving end.
  • the power gear position is directly switched to achieve the purpose of adjusting the transmission power, and the adjustment is accurate and fast.
  • Step S305 Display the adjusted power information.
  • Step S 3Q6 after performing other detections and processing, returning to step S 3Q2 to cycle control power adjustment.
  • the power-adjusted detection includes matching detection with the receiving end, communication channel status detection, and other necessary detections to ensure normal operation of the system.
  • the embodiment of the invention mainly performs power control by establishing a wireless communication channel and adopting an open loop control and a table lookup method. It can directly adjust the position of different powers of different loads in one step, which greatly shortens the response of the system power change, adjusts the time, and increases the stability of the system.
  • FIG. 5 is a block diagram showing the power adjustment system of the wireless power transmission system provided in Embodiment 4 of the present invention.
  • the receiving end 41 of the wireless power transmission system transmits the communication information to the transmitting end of the wireless power transmission system through the wireless communication channel 42;
  • a wireless communication module is respectively added to the transmitting end and the receiving end of the wireless power transmission system, and the wireless communication channel 42 is built to realize the real-time feedback of the relevant information to the transmitting end.
  • the wireless communication channel 42 can adopt wireless technologies such as WIFI, Z IGBEE, and Bluetooth.
  • the transmitting end 43 of the radio energy transmission system specifically includes an index table setting unit 431, an index table searching unit 432, and a power switching unit 433.
  • the index table setting unit 431 first establishes an index table of load information and power parameters; and receives the foregoing communication data. Thereafter, the index table searching unit 432 searches the index table for the power parameter corresponding to the communication information, and then sends the power parameter to the power switching unit 433.
  • the power switching unit 433 switches the transmission power to the receiving with the wireless power transmission system according to the power parameter. Power matching is achieved by matching the power positions of the terminals.
  • a power index table of different devices is built in, and the manner of checking the table is performed.
  • the adjustment of the load output power is more accurate, faster and more efficient than the response change of the parameters from the circuit to estimate the load power, thus improving the control accuracy of the system as a whole.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

一种无线电能传输系统的功率调节方法及系统。该方法包括：无线电能传输系统的接收端发送包含当前负载信息的通讯信息至无线电能传输系统的发射端（S101）；无线电能传输系统的发射端在索引表中查找与负载信息相对应的功率参数（S102）；无线电能传输系统的发射端向无线电能传输系统的接收端发射与功率参数相匹配的功率（S103）。无线电能传输系统的发射端直接根据不同接收端反馈的通讯信息切换到不同的功率档位，提高了系统的控制精度，缩短了调整时间。

Description

说 明 书 无线电能传输系统的功率调节方法及系统 本专利申请要求于 2013年 04月 28日提交的， 申请号为 201310155610.4, 申请人为海尔集团技术研发中心、 海尔集团公司， 发明名称为 "无线电能传输 系统的功率调节方法及系统" 的中国专利申请的优先权， 该申请的全文以引用 的方式并入本申请中。
技术领域
本发明涉及无线电能传输技术领域， 尤其涉及一种无线电能传输系统的功 率调节方法及系统。
背景技术
无线电能传输（Wi re les s Power Transmi s s ion , WPT)又称非接触电能传输 (Contact les s Power Transmi s s ion, CPT) , 就是借助于电磁场或电磁波进行能 量传递的一种技术， 一般采用感应耦合电能传输技术， 通过电磁耦合以非接触 方式向负载传递能量， 其原理如图 1所示。
无线电能传输系统分为发射端 （原边） 电路以及接收端 （副边） 电路两大 部分， 发射端电路主要是完成电能的变换与发送， 接收端电路主要是完成能量 的拾取与稳压。 系统通过原边发射线圈中的高频电流激发的高频磁场在副边拾 取线圈中引起电磁感应产生感应电压完成能量的非接触传送。
在传统的大功率无线电能传输系统中， 发射端的发射功率是根据接收端负 载功率的大小来进行调节。 当负载变化时， 系统的谐振点就会发生变化， 此时 发射端逐渐调整谐振频率等参数来与接收端进行匹配， 以完成功率调整。 该方 法在实现过程中， 存在以下问题：
1、 发射端的发射功率是逐渐逼近接收端的额定功率， 调整时间较长， 不能 即时调整到负载的额定功率；
2、 由于负载功率的大小是通过系统相关参数变化等方式进行反馈， 不可避 免产生了测量误差， 影响到系统功率匹配的精度 c
发明内容
本发明的目的在于提出一种无线电能传输系统的功率调节方法及系统， 无 线电能传输系统发射端直接根据不同接收端的通讯信息切换到不同的功率档 位， 大大缩短了调整时间并提高了系统的控制精度。
为达此目的， 本发明采用以下技术方案：
一种无线电能传输系统的功率调节方法， 包括：
无线电能传输系统的接收端发送包含当前负载信息的通讯信息至无线电能 传输系统的发射端；
无线电能传输系统的发射端在索引表中查找与所述负载信息对应的功率参 数；
无线电能传输系统的发射端向无线电能传输系统的接收端发射与所述功率 参数相匹配的功率。
一种无线电能传输系统的功率调节系统， 包括：
无线电能传输系统接收端， 用于发送通讯信息至无线电能传输系统发射端； 无线通讯信道， 用于传输所述通讯信息；
无线电能传输系统发射端具体包括索引表设定单元、 索引表查找单元和功 率切换单元， 其中，
索引表设定单元， 用于建立负载信息与功率参数的索引表；
索引表查找单元， 用于在索引表中查找与所述通讯信息对应的功率参数； 功率切换单元， 用于根据所述功率参数切换到与无线电能传输系统接收端 相匹配的功率。
本发明在无线电能传输系统中建立通讯信道， 接收端通过通讯信道将自身 相关参数和状态信息发给发射端， 发射端根据不同的参数信息调整功率的大小。 这样发射端发射功率的调整可以一步到位， 大大减少了系统功率的调整时间和 功率调整的误差。 附图说明
图 1是现有技术提供的无线电能传输系统的原理示意图；
图 2是本发明具体实施方式 1提供的无线电能传输系统的功率调节方法流 程图；
图 3是本发明具体实施方式 2提供的无线电能传输系统的功率调节系统接 收端工作流程图；
图 4是本发明具体实施方式 3提供的无线电能传输系统的功率调节系统发 射端工作流程图；
图 5是本发明具体实施方式 4提供的无线电能传输系统的功率调节系统结 构图。
具体实施方式
下面结合附图并通过具体实施方式来进一步说明本发明的技术方案。
图 2是本发明具体实施方式 1提供的无线电能传输系统的功率调节方法流 程图。
在步骤 S 1 01中， 无线电能传输系统的接收端发送包含当前负载信息的通讯 信息至无线电能传输系统的发射端。
作为本发明的一个实施例， 上述负载信息包括： 负载的类别代码、 产品型 号、 档位信息以及状态信息。
在本发明实施例中， 无线电能传输系统的发射端与无线电能传输系统的接 收端建立无线通信通道， 用于传输上述负载信息。
在步骤 S 1 02中， 无线电能传输系统发射端在索引表中查找与所述通讯信息 对应的功率参数。
在本发明实施例中， 发射端内存里建立有索引表， 此索引表包含接收端类 型代码、 功率大小以及其它一些相关信息， 当发射端接收到上述通讯信息后查 询索引表， 找到与之相对应的功率参数。 在步骤 S103中， 无线电能传输系统的发射端向无线电能传输系统的接收端 发射与所述功率参数相匹配的功率。
图 3是本发明具体实施方式 2提供的无线电能传输系统的功率调节系统接 收端工作流程图。
在步骤 S201中， 接收端进行开机初始化。
在步骤 S202中， 发送通讯信息至发射端。
发射端与接收端通讯的信息主要包括负载类别代码、 产品型号、 档位信息 以及状态信息几个字段信息： 负载类别代码主要是代表负载的大类， 如搅拌机、 电饭煲等； 产品型号是代表相同产品不同的型号， 也可能代表不同的额定功率； 档位信息是指负载所处的工作状态， 如电饭煲， 当处于煮饭状态时和处于保温 状态时所代表的功率也是不一样的； 状态信息主要指负载故障信息， 当负载发 生故障时可以及时通知发射端。
在步骤 S203中， 检测工作状态是否发生变化；
若是， 执行步骤 S204 ;
若否， 则重新检测。
在步骤 S204中， 发送档位信息代码至发射端。
接收端开机初始化后通过通讯信道把负载的通信息发至发射端， 由于建立 连接后， 一般只是负载在不同的档位之间进行切换， 故当档位信息及负载大小 变化时只需要通知发射端进行切换到相对应的功率即可。 不同接收端的代码不 同， 而且相同接收端由于所处的功率大小不同所发送的代码也不同。 当接收端 功率有所变化时会及时地通知发射端以启动相应的变更。
在步骤 S205中， 切换工作状态， 然后返回步骤 S203 , 继续循环。
图 4是本发明具体实施方式 3提供的无线电能传输系统的功率调节系统发 射端工作流程图。
步骤 S301 , 发射端开机初始化。
步骤 S 302 , 通过通讯信道接收通讯信息。
在本发明实施例中， 上述通讯信息包括负载的类别代码、 产品型号、 档位 信息以及状态信息。 步骤 S 303 , 查找索引表中与通讯信息相应的功率参数。
在本发明实施例中， 无线电能传输系统的发射端建立负载信息与功率参数 的索引表。
步骤 S 304 , 调整发射功率， 以匹配接收端的工作功率。
本发明实施例通过功率档位直接切换达到调整发射功率的目的， 调整精准 快速。
步骤 S 305 , 显示调整后的功率信息。
步骤 S 3Q6 , 进行其他检测、 处理后， 返回步骤 S 3Q2 , 循环控制功率调节。 该步骤中， 在功率调整后的检测包括与接收端的匹配度检测、 通讯信道状 态检测以及其它保证系统正常运行的必要检测。
本发明实施例主要是通过建立无线通讯信道， 采用开环控制、 查表的方法 进行功率控制。 可直接针对不同的负载的不同功率大小一步调整到位， 大大缩 短了系统功率变化的响应、 调整时间， 增加系统的稳定性。
图 5是本发明具体实施方式 4提供的无线电能传输系统的功率调节系统结 构图。
无线电能传输系统接收端 41通过无线通讯信道 42发送通讯信息至无线电 能传输系统发射端 43 ;
为了解决通讯信息的传输， 本发明实施例在无线电能传输系统的发射端和 接收端分别增设有无线通讯模块， 用于搭建无线通讯信道 42 , 实现接收端实时 向发射端反馈相关信息。 该无线通讯信道 42可以采用 WIFI、 Z IGBEE、 蓝牙等无 线技术。
无线电能传输系统发射端 43具体包括索引表设定单元 431、 索引表查找单 元 432和功率切换单元 433, 索引表设定单元 431首先建立负载信息与功率参数 的索引表； 在接收到前述通讯数据后， 索引表查找单元 432 在索引表中查找与 该通讯信息对应的功率参数， 然后发送至功率切换单元 433; 功率切换单元 433 根据所述功率参数将发射功率切换到与无线电能传输系统的接收端相匹配的功 率档位， 实现功率调节。
本发明实施例通过内建不同设备的功率索引表， 并通过查表的方式进行对 负载输出功率的调整， 相比从电路中参数的响应变化来推算负载功率的调节方 式精确、 快速、 高效， 从而总体上提高了系统的控制精度。
以上所述仅是本发明的优选实施方式， 应当指出， 对于本技术领域的普通 技术人员来说， 在不脱离本发明原理的前提下， 还可以作出若干改进和润饰， 这些改进和润饰也应视为本发明的保护范围。

Claims

权 利 要 求 书
1、 一种无线电能传输系统的功率调节方法， 其特征在于， 包括：
无线电能传输系统的接收端发送包含当前负载信息的通讯信息至无线电能 传输系统的发射端；
无线电能传输系统的发射端在索引表中查找与所述负载信息对应的功率参 数；
无线电能传输系统的发射端向无线电能传输系统的接收端发射与所述功率 参数相匹配的功率。
2、 根据权利要求 1所述的方法， 其特征在于， 所述负载信息包括负载的类 别代码、 产品型号、 档位信息以及状态信息。
3、 根据权利要求 1所述的方法， 其特征在于， 所述无线电能传输系统的发 射端在索引表中查找与所述负载信息对应的功率参数之前， 还包括：
无线电能传输系统的发射端建立负载信息与功率参数的索引表。
4、 根据权利要求 1所述的方法， 其特征在于， 所述无线电能传输系统的接 收端发送包含当前负载信息的通讯信息至无线电能传输系统的发射端之前， 还 包括：
无线电能传输系统的发射端与无线电能传输系统的接收端建立无线通信通 道。
5、根据权利要求 4所述的方法，其特征在于，所述无线通讯信道采用 WIFI、 ZIGBEE或者蓝牙技术。
6、 一种无线电能传输系统的功率调节系统， 其特征在于， 包括：
无线电能传输系统接收端， 用于发送包含当前负载信息的通讯信息至无线 电能传输系统的发射端；
无线通讯信道， 用于传输所述负载信息；
无线电能传输系统发射端具体包括索引表设定单元、 索引表查找单元和功 率切换单元， 其中，
索引表设定单元， 用于建立负载信息与功率参数的索引表；
索引表查找单元， 用于在索引表中查找与所述通讯信息对应的功率参数； 功率切换单元， 用于向无线电能传输系统的接收端发射与所述功率参数相 匹配的功率。
7、 根据权利要求 6所述的系统， 其特征在于， 所述负载信息包括负载的类 别代码、 产品型号、 档位信息以及状态信息。
8、根据权利要求 6所述的系统，其特征在于，所述无线通讯信道采用 WIFI、 ZIGBEE或者蓝牙技术。
PCT/CN2013/085452 2013-04-28 2013-10-18 无线电能传输系统的功率调节方法及系统 WO2014176872A1 (zh)

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