WO2014176840A1 - 动态负载切换的控制方法及系统 - Google Patents

动态负载切换的控制方法及系统 Download PDF

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Publication number
WO2014176840A1
WO2014176840A1 PCT/CN2013/080792 CN2013080792W WO2014176840A1 WO 2014176840 A1 WO2014176840 A1 WO 2014176840A1 CN 2013080792 W CN2013080792 W CN 2013080792W WO 2014176840 A1 WO2014176840 A1 WO 2014176840A1
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WO
WIPO (PCT)
Prior art keywords
switching
time period
predetermined time
load
transmitting end
Prior art date
Application number
PCT/CN2013/080792
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English (en)
French (fr)
Inventor
李聃
秦超
龙海岸
孙会
娄兵兵
Original Assignee
海尔集团技术研发中心
海尔集团公司
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Application filed by 海尔集团技术研发中心, 海尔集团公司 filed Critical 海尔集团技术研发中心
Publication of WO2014176840A1 publication Critical patent/WO2014176840A1/zh

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Classifications

    • 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
    • H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • 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
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0048—Circuits or arrangements for reducing losses
    • H02M1/0054—Transistor switching losses
    • H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
    • 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
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/1566—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators with means for compensating against rapid load changes, e.g. with auxiliary current source, with dual mode control or with inductance variation
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Definitions

  • the present invention relates to the field of radio energy transmission, and in particular, to a method and system for controlling dynamic load switching.
  • the soft switch control refers to the operation of the semiconductor component control device such as high-power thyristor using zero voltage switching or zero current switching.
  • the operating frequency tracks the operating frequency of the resonant system in order to achieve high system efficiency.
  • the hard switching control refers to the working mode in which the device switches when the voltage is not zero or the current is not zero. The system switch consumes a large amount of power to sacrifice the system working efficiency. Improve system stability.
  • the soft-switch control mode When the soft-switch control mode is used to control the frequency of the resonant system, when the dynamic load is switched or the load power is abrupt, the resonant system will be affected by the sudden change of the load, resulting in the detuning of the system, causing the system to be unstable, and serious. Causes damage to components.
  • the frequency of the resonant system is simply controlled by the hard-switching control mode, the system efficiency is lower than that of the soft-switching control, and the loss of the switching tube is large, which affects the service life of the main components of the system.
  • the technical problem to be solved by the present invention is to provide a dynamic load switching control method and system.
  • the switching soft switching working mode is hard switching operation, and then switching after the load switching is completed. It is a soft switch control to achieve stable operation of the wireless power transmission system during dynamic load switching.
  • a method for controlling dynamic load switching comprising: The transmitting end controls the operation of the resonant circuit in a soft switching manner;
  • the communication information is sent to the transmitting end;
  • the transmitting end control parameter is adjusted according to the communication information, and the resonant circuit is controlled in a hard switching manner during the first predetermined time period;
  • the receiving end load completes the corresponding action switching
  • the communication information includes a switching action instruction to be executed by the receiving end load, and the first predetermined time period refers to a time when the transmitting end receives the communication information until the end of the hard switching control mode.
  • the transmitting end controls the end of the resonant circuit operation in a hard switching manner during the first predetermined period of time, the transmitting end switches to a soft switching mode to control the operation of the resonant circuit.
  • the receiving end is about to perform load switching, delaying according to the second predetermined time period and transmitting a switching action instruction to be executed by the load to the transmitting end in the third predetermined time period; when according to the second predetermined At the end of the time period delay, the load response is switched accordingly;
  • the second predetermined time period refers to a time when the receiving end receives the switching action command to the load response corresponding to the switching action;
  • the third predetermined time period refers to the receiving end receiving the switching action command to send the switching action command to Time at the transmitting end;
  • the second predetermined time period is less than the first predetermined time period, and the third predetermined time period is smaller than the second predetermined time period.
  • the transmitting end and the receiving end transmit the communication information through a dedicated communication channel or an inductive coupling channel.
  • the transmitting end control parameter is adjusted according to the communication information, and the resonant circuit is controlled in a hard switching manner according to the corresponding frequency in the first predetermined time period.
  • the present invention also discloses a dynamic load switching control system, the system including transmitting At the end and the receiving end, the transmitting end transmits power to the receiving end through the inductive coupling channel.
  • the transmitting end controls the resonant circuit in a soft switching manner; when the receiving end is to perform load switching, transmitting communication information to the transmitting end; when the transmitting end receives the communication information sent by the receiving end, according to the communication information, the transmitting end
  • the control parameter is adjusted and controls the operation of the resonant circuit in a hard switching manner during the first predetermined time period; during the first predetermined time period, the receiving end load completes the corresponding action switching;
  • the communication information includes a switching action instruction to be executed by the receiving end load, and the first predetermined time period refers to a time when the transmitting end receives the communication information until the end of the hard switching control mode.
  • the transmitting end controls the end of the resonant circuit operation in the corresponding hard switching manner in the first predetermined time period, the transmitting end switches to a soft switching mode to control the operation of the resonant circuit.
  • the receiving end when the receiving end is about to perform load switching, delaying according to the second predetermined time period and transmitting a switching action instruction to be executed by the load to the transmitting end in the third predetermined time period;
  • the load response When the delay of the second predetermined time period ends, the load response correspondingly switches;
  • the second predetermined time period refers to a time when the receiving end receives the switching action command to the load response corresponding to the switching action;
  • the third predetermined time period refers to the receiving end receiving the switching action command to send the switching action command to Time at the transmitting end;
  • the second predetermined time period is less than the first predetermined time period, and the third predetermined time period is smaller than the second predetermined time period.
  • the transmitting end and the receiving end transmit the communication information through a dedicated communication channel or an inductive coupling channel.
  • the transmitting end control parameter is adjusted according to the communication information, and the resonant circuit is controlled in a hard switching manner according to the corresponding frequency in the first predetermined time period.
  • FIG. 1 is a flowchart of a method for controlling dynamic load switching according to an embodiment of the present invention
  • FIG. 2 is a flowchart of performing load switching on a transmitting end according to an embodiment of the present invention
  • FIG. 3 is a flowchart of performing load switching on a receiving end according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of a dynamic load switching time according to the present invention.
  • FIG. 5 is a structural block diagram of a control system for dynamic load switching according to an embodiment of the present invention.
  • FIG. 1 is a flowchart of a method for controlling dynamic load switching according to an embodiment of the present invention.
  • the method is applied to a wireless power transmission system.
  • the wireless power transmission system includes a transmitting end and a receiving end.
  • the connection between the transmitting end and the receiving end is established by inductive coupling for wireless energy transmission, and the receiving end supplies power to the load.
  • the transmitting end includes a transmitting circuit (including a transmitting coil), a resonant circuit and a control circuit; and the receiving end includes a receiving circuit (including a receiving coil).
  • the primary and secondary resonant circuits may be selected from a group of capacitors, resistors, and inductive devices, or other alternatives may be selected.
  • the transmitting end controls the operation of the resonant circuit in a soft switching manner, and transmits power to the receiving end;
  • the receiving end delays according to the second predetermined time period and sends the communication information to the transmitting end within the third predetermined time period;
  • the transmitting end receives the communication information sent by the receiving end, adjusts the control parameter of the resonant circuit according to the communication information, and switches the soft switching mode to the hard switching mode to control the resonant circuit operation in the first predetermined time period, and transmits the electrical energy to the receiving end;
  • the receiving end completes a corresponding switching action
  • the communication information includes a switching action instruction that the receiving end load is to perform.
  • the first predetermined time period refers to a time when the transmitting end receives the communication information until the end of the hard switching control mode.
  • the second predetermined time period refers to a time when the receiving end receives the switching action instruction to the load response corresponding to the switching action; the third predetermined time period refers to the receiving end receiving the switching action instruction to send the switching action instruction to the transmitting end.
  • the second predetermined time period is less than the first predetermined time period, and the third predetermined time period is smaller than the second predetermined time period.
  • the method further includes: when the transmitting end controls the operation of the resonant circuit in a hard-switching manner in the first predetermined time period, the transmitting end switches to a soft-switching mode to control the resonant circuit operation.
  • the method described in this embodiment utilizes a combination of soft switch control and hard switch control to ensure high stability of the system during dynamic load switching and to ensure high transmission efficiency to the utmost extent.
  • FIG. 2 is a flowchart of performing load switching on a transmitting end according to an embodiment of the present invention. As shown in Figure 2, the specific process includes:
  • Step 201 The radio energy transmitting end controls the resonant circuit to work in a soft switching manner.
  • the radio energy transmitting end controls the operation of the resonant circuit in a soft switching manner, so that the frequency of the load end satisfies the resonant frequency of the system, and the efficient transmission can be ensured.
  • the existing radio energy transmission is usually a one-way transmission mode, and the receiving end obtains a signal from the transmitting end through inductive coupling to supply power to the load.
  • the communication between the transmitting end and the receiving end needs to be set.
  • the way of communication between the transmitting end and the receiving end can be selected according to actual needs. For example, data interaction between the two parties can be accomplished by sharing the inductively coupled transmission channel.
  • the transmitting end and the receiving end may also transmit communication information through a dedicated communication channel, the dedicated communication channel being different from the inductive coupling transmission channel.
  • the transmitting end and the receiving end transmit information wirelessly through a dedicated communication channel.
  • the communication information refers to a switching action instruction or the like to be executed by the receiving end load. For example, the load will be switched from standby to active, or from active to standby, or the load power needs to be adjusted.
  • the switching action instruction to be executed by the load is transmitted to the transmitting end.
  • Step 203 Adjust the transmitting end control parameter according to the communication information and control the resonant circuit to work in a hard switching manner during the first predetermined time period.
  • the transmitting end Since the resonant circuit is affected by the sudden change of the load, after receiving the communication information sent by the receiving end, the transmitting end adjusts the resonance parameter of the system according to the communication information to adapt to the power requirement of the load end. When the load is switched, it has a great influence on the parameters of the resonant circuit. If the operation of the resonant circuit is continued in the soft switching mode, the resonant circuit may be detuned. Therefore, after receiving the communication information, the transmitting end controls the resonant circuit to work by the hard switching mode for the first predetermined time period to adapt to the load switching. The effect on the resonant circuit.
  • the first predetermined time period may be set by the transmitter controller, or may be set by the operator by setting a button.
  • the parameter settings for the first predetermined time period can be set as needed.
  • Step 204 The system works in a hard-switching manner.
  • the transmitting end switches to the hard switching mode to control the operation of the resonant circuit.
  • the hard switching mode is to control the operation of the resonant circuit according to the selection of the corresponding frequency value according to the communication information.
  • the frequency value is preset based on the load different power.
  • the hard switching mode enables the resonant circuit to complete parameter adjustment in a short time and improves the stability of the resonant circuit.
  • Step 205 The detecting transmitting device controls whether the working of the resonant system ends in a corresponding hard switching manner in the first predetermined time period, and if so, executing step 201; otherwise, performing step 204.
  • the transmitting end controls the operation of the resonant system in a corresponding hard switching manner.
  • the load completes the corresponding action switching, and when the transmitting end controls the operation of the resonant circuit in the corresponding hard switching manner in the first predetermined time period, the transmitting end switches to the soft switching mode. Control the resonant circuit to work.
  • FIG. 3 is a flow chart of dynamically switching a load provided by an embodiment of the present invention. As shown in Figure 3, the specific process includes:
  • Step 301 The receiving end load is in standby or working state.
  • Step 302 Detect whether the load is about to execute a switching action instruction.
  • Step 303 Perform a delay according to the second predetermined time period and send the switching action instruction to the wireless power transmitting end within a third predetermined time period.
  • the load master chip sends a switching action instruction to be executed by the load to the receiving end, and when the receiving end load receives the switching action instruction to be executed, the delay is performed according to the second predetermined time period set by the operator while the third predetermined The switching action instruction to be executed by the load is sent to the transmission during the time period, where the second predetermined time period refers to the time when the receiving end receives the switching action instruction to the load response corresponding switching action; the third predetermined time period refers to Receiving, by the receiving end, a switching action instruction to a time when the switching action instruction is sent to the transmitting end;
  • the second predetermined time period is less than the first predetermined time period, and the third predetermined time period is smaller than the second predetermined time period.
  • the second predetermined time period is greater than the third predetermined time period to ensure that the load action command to be executed is sent to the transmitting end before the load response switching action, and the transmitting end ensures that the control end adjusts the control parameter ahead of time.
  • Step 304 Continue the delay according to the second predetermined time period.
  • Step 305 The second predetermined time period delay ends, and responds to the operation instruction.
  • the transmitting end At the end of the second predetermined time period, the transmitting end has adjusted the resonant circuit frequency to the frequency required for the load switching action, and the load completes the corresponding action switching.
  • the second predetermined time period is smaller than the first predetermined time period, that is, when the transmitting end controls the operation of the resonant circuit in a hard switching manner according to the response frequency within the first predetermined time period, the load action switching has been completed.
  • the transmitting end switches the hard switching mode to the soft switching mode to control the resonant circuit. When the whole switching process ensures that the load action is switched, the transmitting end controls the resonant circuit in a hard switching manner, improving 4 is a timing diagram of dynamic load switching according to the present invention.
  • the receiving end when receiving the switching action instruction, performs the delay according to the second predetermined time period T2, and performs the switching action after the T2 time period ends.
  • the switching action instruction to be executed by the load needs to be sent to the transmitting end.
  • the third predetermined time period T3 refers to a time period when the receiving end receives the switching action instruction and starts transmitting the related information, and the time period when the transmitting end receives the information is to prevent the communication information transmission delay from being too long, and the communication information is not timely. Transmission to the transmitting end, the transmitter control parameter adjustment cannot be completed in advance.
  • the transmitting end controls the operation of the resonant circuit in a soft switching manner.
  • the transmitting end control parameter is adjusted according to the communication information, and continues to be hard-switched for the first predetermined time period T1.
  • the mode controls the operation of the resonant circuit, and the first predetermined time period T1 refers to a time when the transmitting end receives the communication information until the end of the hard switching control mode; in the first predetermined time period T1, the load completes the corresponding action switching;
  • the first predetermined time period T1 is greater than the second predetermined time period T2, which can ensure that the load end controls the resonant circuit in a hard switching manner after the action switching is completed, and the stability of the system can be ensured.
  • switching to the soft switching mode controls the operation of the resonant circuit.
  • FIG. 5 is a structural block diagram of a control system for dynamic load switching according to an embodiment of the present invention. As shown in FIG. 5, the system includes a transmitting end 501 and a receiving end 502. The transmitting end 501 transmits power to the receiving end 502 through an inductive coupling channel, and the receiving end 502 supplies power to the load 503.
  • the transmitting end 501 and the receiving end 502 establish a connection by inductive coupling to perform radio energy transmission; the transmitting end 501 controls the operation of the resonant circuit in a soft switching manner; when the receiving end 502 is to perform load switching, the communication is sent to the transmitting end 501.
  • Information when the transmitting end 501 receives the communication information sent by the receiving end 502, adjusts the control parameters of the transmitting end 501 according to the communication information, and controls the resonant circuit to work in a hard switching manner for the first predetermined time period; During the first predetermined time period, The receiving load completes the corresponding action switching;
  • the communication information includes a switching action instruction to be executed by the load, and the first predetermined time period refers to a time when the transmitting end receives the communication information until the end of the hard switching control mode.
  • the transmitting end includes a transmitting circuit (including a transmitting coil), a resonant circuit and a control circuit; and the receiving end includes a receiving circuit (including a receiving coil).
  • a transmitting circuit including a transmitting coil
  • a resonant circuit including a control circuit
  • the receiving end includes a receiving circuit (including a receiving coil).
  • the various circuit unit components are implemented differently.
  • the primary and secondary resonant circuits may be selected from a group of capacitors, resistors, and inductive devices, or other alternatives may be selected.
  • the transmitting end 501 When the transmitting end 501 controls the operation of the resonant circuit in a hard switching manner during the first predetermined period of time, the transmitting end switches to a soft switching mode to control the operation of the resonant circuit.
  • the second predetermined time period refers to a time when the receiving end receives the switching action command to the load response corresponding to the switching action; the third predetermined time period refers to the receiving end receiving the switching action command to send the switching action command to The time of the transmitting end; the second predetermined time period is smaller than the first predetermined time period.
  • the system in this embodiment involves the information exchange between the transmitting end and the receiving end. Therefore, the communication between the transmitting end and the receiving end needs to be set.
  • the way of communication between the transmitting end and the receiving end can be selected according to actual needs. For example, the mutual data interaction can be accomplished by sharing the radio energy transmission channel.
  • the transmitting end and the receiving end may also be transmitted through a dedicated communication channel. Communication information, the dedicated communication channel being different from the radio energy transmission channel.
  • the transmitting end and the receiving end transmit information in a wired or wireless manner through a dedicated communication channel.
  • the transmitting end control parameter is adjusted according to the communication information, and the resonant circuit is controlled in a hard switching manner according to the corresponding frequency in the first predetermined time period.
  • the transmitting end controls the operation of the resonant circuit by combining the soft switch control and the hard switch control, ensuring that the transmitting end works in the soft switch state for most of the time, and controls the transmitting end when the dynamic load is switched.
  • the hard-switching state in the case of ensuring efficient transmission of the system, the system operation stability is improved, and system detuning caused by dynamic load switching is eliminated.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Selective Calling Equipment (AREA)
  • Inverter Devices (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

一种动态负载切换的控制方法及系统，发射端（501）以软开关方式控制谐振电路工作；当接收端（502）将要进行负载（503）切换时，向发射端（501）发送通讯信息；当发射端（501）接收到接收端（502）发送的通讯信息时，根据该通讯信息对发射端（501）控制参数进行调节并在第一预定时间段内以硬开关方式控制谐振电路工作；在第一预定时间段（T1）内，接收端负载（503）完成相应动作切换；其中，该通讯信息包括负载（503）将要执行的切换动作指令，该第一预定时间段指发射端（501）接收到通讯信息到硬开关控制方式结束的时间。利用软开关和硬开关相结合的方式控制谐振电路工作的方式，消除了接收端负载突变时对谐振系统的影响，在保证系统高效传输的情况下，提高系统的稳定性及安全性。

Description

动态负载切换的控制方法及系统 技术领域
本发明涉及无线电能传输领域， 尤其涉及一种动态负载切换的控制方法及 系统。
背景技术
无线电能传输系统工作频率有以下两种控制方式： 软开关控制和硬开关控 制， 软开关控制是指用大功率可控硅等半导体元件控制电器采用零电压切换或 者零电流切换的方式工作， 系统工作频率跟踪谐振系统工作频率， 以期达到系 统高效率； 硬开关控制是指器件在电压不为零或者电流不为零的情况下进行切 换的工作方式， 系统开关耗损大， 以牺牲系统工作效率， 提高系统稳定性。
当单纯的采用软开关控制方式对谐振系统频率进行控制时， 在动态负载切 换或者负载功率突变时， 谐振系统会受到负载突变的影响， 导致系统工作失谐， 引起系统工作不稳定， 严重的会导致元器件损坏。 当单纯的采用硬开关控制方 式对谐振系统频率进行控制时， 系统效率相较于软开关控制较低， 且开关管损 耗大， 影响系统主要元器件使用寿命。
发明内容
本发明所要解决的技术问题是提供一种动态负载切换的控制方法及系统， 发射器在动态负载切换或者负载自身功率切换时， 转换软开关工作方式为硬开 关工作， 在负载切换完毕后再转换为软开关控制， 以实现无线电力传输系统在 动态负载切换时的稳定工作。
为达到上述目的， 本发明是通过以下技术方案来实现的：
一种动态负载切换的控制方法， 该方法包括： 发射端以软开关方式控制谐振电路工作；
当接收端将要进行负载切换时， 向发射端发送通讯信息；
当发射端接收到接收端发送的通讯信息时， 根据所述通讯信息对发射端控 制参数进行调节并在第一预定时间段内以硬开关方式控制谐振电路工作；
在所述第一预定时间段内， 接收端负载完成相应动作切换；
其中， 所述通讯信息包括接收端负载将要执行的切换动作指令， 所述第一 预定时间段指发射端接收到通讯信息至硬开关控制方式结束的时间。
进一歩地， 当所述发射端在所述第一预定时间段内以硬开关方式控制谐振 电路工作结束时， 发射端切换成软开关方式控制谐振电路工作。
进一歩地， 当接收端将要进行负载切换时， 根据第二预定时间段进行延时 并在第三预定时间段内将负载将要执行的切换动作指令发送到发射端； 当按照 所述第二预定时间段延时结束时， 负载响应相应切换动作；
其中， 所述第二预定时间段指接收端接收到切换动作指令至负载响应相应 切换动作的时间； 所述第三预定时间段指接收端接收到切换动作指令至将所述 切换动作指令发送到发射端的时间；
所述第二预定时间段小于所述第一预定时间段， 所述第三预定时间段小于 所述第二预定时间段。
进一歩地， 所述发射端与接收端通过专用的通讯信道或者感应耦合信道传 输通讯信息。
进一歩地， 当所述发射端接收到接收端发送的通讯信息时， 根据所述通讯 信息对发射端控制参数进行调节并在第一预定时间段内按照相应频率以硬开关 方式控制谐振电路工作。
相应地， 本发明还公开一种动态负载切换的控制系统， 所述系统包括发射 端和接收端， 发射端通过感应耦合通道向接收端传输电能，
其中， 发射端以软开关方式控制谐振电路工作； 当接收端将要进行负载切 换时， 向发射端发送通讯信息； 当发射端接收到接收端发送的通讯信息时， 根 据所述通讯信息对发射端控制参数进行调节并在第一预定时间段内以硬开关方 式控制谐振电路工作； 在所述第一预定时间段内， 接收端负载完成相应动作切 换；
其中， 所述通讯信息包括接收端负载将要执行的切换动作指令， 所述第一 预定时间段指发射端接收到通讯信息至硬开关控制方式结束的时间。
进一歩地， 当所述发射端在所述第一预定时间段内以相应硬开关方式控制 谐振电路工作结束时， 发射端切换成软开关方式控制谐振电路工作。
进一歩地， 当接收端将要进行负载切换时， 根据第二预定时间段进行延时 并在第三预定时间段内将所述负载将要执行的切换动作指令发送到发射端； 当 按照所述第二预定时间段延时结束时， 负载响应相应切换动作；
其中， 所述第二预定时间段指接收端接收到切换动作指令至负载响应相应 切换动作的时间； 所述第三预定时间段指接收端接收到切换动作指令至将所述 切换动作指令发送到发射端的时间；
所述第二预定时间段小于所述第一预定时间段， 所述第三预定时间段小于 所述第二预定时间段。
进一歩地， 所述发射端与接收端通过专用的通讯信道或者感应耦合信道传 输通讯信息。
进一歩地， 当发射端接收到接收端发送的通讯信息时， 根据所述通讯信息 对发射端控制参数进行调节并在第一预定时间段内按照相应频率以硬开关方式 控制谐振电路工作。 采用本发明的技术方案， 在无线电能传输系统接收端负载突变时， 对发射 端参数进行提前调节， 在软开关工作过程中加入调整参数的硬开关工作时段， 消除接收端负载突变时对谐振系统的影响， 提高系统工作稳定性及安全性。 附图说明
图 1为本发明实施例提供的负载动态切换的控制方法流程图；
图 2为本发明实施例提供的发射端进行负载切换的流程图；
图 3为本发明实施例提供的接收端进行负载切换的流程图；
图 4为本发明动态负载切换时间示意图；
图 5为本发明实施例提供的动态负载切换的控制系统结构框图。
具体实施方式
下面结合附图和实施例对本发明作进一歩说明。 此处所描述的具体实施例 仅用于解释本发明， 而非对本发明的限定。
图 1为本发明实施例提供的负载动态切换的控制方法流程图。 本实施例中 该方法应用于无线电能传输系统中。
无线电能传输系统包括发射端和接收端。 发射端与接收端之间通过感应耦 合建立连接， 进行无线电能传输， 接收端为负载供电。 这里需要说明的是， 本 实施例中， 无线电能传输系统包括的主要功能单元与现有技术是相同或相近 的。 发射端包括发射电路 （包括发射线圈） 、 谐振电路和控制电路； 接收端包 括接收电路 （包括接收线圈） 。 本领域普通技术人员容易知道， 所述各电路单 元组成可能采用的实现方式不同。 例如原边和副边谐振电路可以选择由一组电 容、 电阻和电感器件组成， 也可以选择其他可替代方案。
具体流程如下：
发射端以软开关方式控制谐振电路工作， 向接收端传输电能； 当接收端将要进行负载切换时， 接收端按照第二预定时间段进行延时并在 第三预定时间段内向发射端发送通讯信息；
发射端接收到接收端发送的通讯信息， 根据所述通讯信息调整谐振电路的 控制参数， 在第一预定时间段内将软开关方式切换为硬开关方式控制谐振电路 工作， 向接收端传输电能；
在所述第一预定时间段内， 接收端完成相应切换动作；
其中， 所述通讯信息包括接收端负载将要执行的切换动作指令。 所述第一 预定时间段指发射端接收到通讯信息至硬开关控制方式结束的时间。
所述第二预定时间段指接收端接收到切换动作指令至负载响应相应切换动 作的时间； 所述第三预定时间段指接收端接收到切换动作指令至将所述切换动 作指令发送到发射端的时间；
所述第二预定时间段小于所述第一预定时间段， 所述第三预定时间段小于 所述第二预定时间段。
此外， 在上述歩骤基础上还包括， 当所述发射端在所述第一预定时间段内 以硬开关方式控制谐振电路工作结束时， 发射端切换成软开关方式控制谐振电 路工作。
本实施例所述的方法， 利用软开关控制和硬开关控制相结合的方式， 保证 在负载动态切换的时， 系统稳定性高， 且最大限度的保证较高的传输效率。
图 2为本发明实施例提供的发射端进行负载切换的流程图。 如图 2所示， 具体流程包括：
歩骤 201 : 无线电能发射端以软开关方式控制谐振电路工作。
无线电能发射端以软开关方式控制谐振电路工作， 以使负载端频率满足系 统谐振频率， 能够保证高效传输。 歩骤 202 : 检测发射端是否接收到接收端发送的通讯信息， 如是， 执行歩 骤 203 ; 否则， 执行歩骤 201。
现有的无线电能传输通常为单向传输方式， 接收端通过感应耦合的方式获 取发射端发出的信号， 为负载提供电源。 本实施例中， 由于涉及到发射端与接 收端之间的信息交互， 因此， 需要对发射端与接收端之间的通讯进行设置。 对 于发射端与接收端之间通讯的方式可以根据实际需要进行选择。 例如， 可以通 过共用感应耦合传输通道的方式完成双方数据交互。 当然， 为了实现发射端和 接收端数据交互， 需要对无线电能传输通道上传输信号的类型及时间进行控 制。 另外， 为了避免单向无线传输信道上产生信号干扰， 还可以采用发射端与 接收端通过专用通讯信道传输通讯信息， 所述专用通讯信道与所述感应耦合传 输信道不同。 发射端与接收端通过专用通讯信道以无线方式进行信息传输。
所述通讯信息是指接收端负载将要执行的切换动作指令等。 例如， 负载将 要由待机状态切换到工作状态， 或者由工作状态切换到待机状态， 或者， 负载 端功率需要进行调整等。
当接收端负载接收到将要执行的切换动作指令时， 将所述负载将要执行的 切换动作指令发送到发射端。
歩骤 203 : 根据所述通讯信息对发射端控制参数进行调节并在第一预定时 间段内以硬开关方式控制谐振电路工作。
由于谐振电路会受到负载突变的影响， 因此发射端接收到接收端发送的通 讯信息后， 根据通讯信息对系统谐振参数进行调整， 以适应负载端的功率要 求。 负载切换时， 对于谐振电路参数影响较大， 如果继续以软开关方式控制谐 振电路工作， 容易导致谐振电路工作失谐。 因此， 发射端在接收到通讯信息 后， 会在第一预定时间段内通过硬开关方式控制谐振电路工作以适应负载切换 时， 对谐振电路产生的影响。
这里需要说明的是， 所述第一预定时间段可由发射端控制器设置完成， 也 可以由操作者通过设置按键完成设置。 对于所述第一预定时间段参数设置可根 据需要进行设置。
歩骤 204: 系统以硬开关方式工作。
发射端切换到硬开关方式控制谐振电路工作。 其中， 所述硬开关方式是根 据通讯信息选择相应频率值控制谐振电路工作。 所述频率值是根据负载不同功 率情况下预先设定的。 硬开关方式能够使得谐振电路短时间内完成参数调整， 提高了谐振电路的稳定性。
歩骤 205 : 检测发射装置在所述第一预定时间段内以相应硬开关方式控制 谐振系统工作是否结束， 如是， 执行歩骤 201 ; 否则， 执行歩骤 204。
在所述第一预定时间段内， 发射端以相应硬开关方式控制谐振系统工作。 在所述第一预定时间段内， 负载完成相应动作切换， 并且当所述发射端在所述 第一预定时间段内以相应硬开关方式控制谐振电路工作结束时， 发射端切换成 软开关方式控制谐振电路工作。
图 2是从发射端的角度对于负载动态切换流程的描述。 图 3本发明实施例 提供的负载进行动态切换的流程图。 如图 3所示， 具体流程包括：
歩骤 301 : 接收端负载处于待机或者工作状态。
歩骤 302 : 检测负载是否将要执行切换动作指令。
这里需要说明的是， 负载是否执行切换动作指令是由负载主控芯片中设定 的执行流程确定的。 当然， 最终选择哪个负载工作是由操作者设定的。 所述负 载将要执行的切换动作指令包括由待机状态切换到工作状态， 或者由工作状态 切换到待机状态， 或者完成自身功率的切换等。 歩骤 303 : 根据第二预定时间段进行延时并在第三预定时间段内将所述切 换动作指令发送到无线电能发射端。
负载主控芯片将负载将要执行的切换动作指令发送到接收端， 当接收端负 载接收到将要执行的切换动作指令时， 根据操作者设定的第二预定时间段进行 延时同时在第三预定时间段内将所述负载将要执行的切换动作指令发送到发射 其中， 所述第二预定时间段指接收端接收到切换动作指令至负载响应相应 切换动作的时间； 所述第三预定时间段指接收端接收到切换动作指令至将所述 切换动作指令发送到发射端的时间；
所述第二预定时间段小于所述第一预定时间段， 所述第三预定时间段小于 所述第二预定时间段。
第二预定时间段大于第三预定时间段保证在负载响应切换动作之前， 将负 载将要执行的切换动作指令发送到发射端， 保证发射端提前完成控制参数调 节。
歩骤 304: 按照第二预定时间段继续延时。
歩骤 305 : 第二预定时间段延时结束， 响应操作指令。
第二预定时间段结束时， 发射端已经将谐振电路频率调整到了负载切换动 作需要的频率， 此时负载完成相应动作切换。 所述第二预定时间段小于所述第 一预定时间段， 即发射端在所述第一预定时间段内按照响应频率以硬开关方式 控制谐振电路工作结束时， 已经完成负载动作切换。 为了兼顾系统高效传输的 要求， 发射端将硬开关方式再切换成软开关方式控制谐振电路工作， 整个切换 过程保证负载动作切换时， 发射端是以硬开关方式控制谐振电路工作的， 提高 图 4为本发明动态负载切换的时间示意图。 如图 4所示， 接收端接收到切 换动作指令时， 根据第二预定时间段 T2进行延时， 待 T2时间段结束后再执行 切换动作。 同时接收到切换动作指令时， 需要将所述负载将要执行的切换动作 指令发送到发射端。 所述第三预定时间段 T3 是指从接收端接收到切换动作指 令开始发送相关信息， 到发射端接收到该信息的时间段， 是为了防止通讯信息 传输延时过长， 导致通讯信息没有及时传输到发射端， 无法提前完成发射端控 制参数调节。 发射端以软开关方式控制谐振电路工作， 当发射端接收到接收端 发送的通讯信息时， 根据所述通讯信息对发射端控制参数进行调节， 并在第一 预定时间段 T1内持续以硬开关方式控制谐振电路工作， 第一预定时间段 T1指 发射端接收到通讯信息至硬开关控制方式结束的时间； 在所述第一预定时间段 T1内， 负载完成相应动作切换；
其中， 第一预定时间段 T1大于第二预定时间段 T2 , 能够保证负载在进行 动作切换完成后， 发射端还是以硬开关方式控制谐振电路工作， 能够保证系统 的稳定性。 当所述发射端在所述第一预定时间段内以相应硬开关方式控制谐振 电路工作结束时， 切换成软开关方式控制谐振电路工作。
图 5为本发明实施例提供的动态负载切换的控制系统结构框图。 如图 5所 示， 所述系统包括发射端 501和接收端 502， 发射端 501通过感应耦合信道向 接收端 502传输电能， 接收端 502为负载 503供电，
其中， 所述发射端 501与接收端 502通过感应耦合建立连接， 进行无线电 能传输； 发射端 501以软开关方式控制谐振电路工作； 当接收端 502将要进行 负载切换时， 向发射端 501发送通讯信息； 当发射端 501接收到接收端 502发 送的通讯信息时， 根据所述通讯信息对发射端 501控制参数进行调节并在第一 预定时间段内以硬开关方式控制谐振电路工作； 在所述第一预定时间段内， 接 收端负载完成相应动作切换；
其中， 所述通讯信息包括负载将要执行的切换动作指令， 所述第一预定时 间段指发射端接收到通讯信息至硬开关控制方式结束的时间。
这里需要说明的是， 本实施例中， 无线电能传输系统包括的主要功能单元 与现有技术是相同的。 发射端包括发射电路 （包括发射线圈） 、 谐振电路和控 制电路； 接收端包括接收电路 （包括接收线圈） 。 本领域普通技术人员容易知 道， 所述各电路单元组成采用的实现方式不同。 例如原边和副边谐振电路可以 选择由一组电容、 电阻和电感器件组成， 也可以选择其他可替代方案。
当所述发射端 501在所述第一预定时间段内以硬开关方式控制谐振电路工 作结束时， 发射端切换成软开关方式控制谐振电路工作。
当接收端 502将要进行负载切换时， 根据第二预定时间段进行延时并并在 第三预定时间段内将所述负载将要执行的切换动作指令发送到发射端； 当接收 端按照第二预定时间段延时结束时， 负载响应相应切换动作；
其中， 所述第二预定时间段指接收端接收到切换动作指令至负载响应相应 切换动作的时间； 所述第三预定时间段指接收端接收到切换动作指令至将所述 切换动作指令发送到发射端的时间； 所述第二预定时间段小于所述第一预定时 间段。
本实施例所述系统由于涉及到发射端与接收端之间的信息交互， 因此， 需 要对发射端与接收端之间的通讯进行设置。 对于发射端与接收端之间通讯的方 式可以根据实际需要进行选择。 例如， 可以通过共用所述无线电能传输通道的 方式完成双方数据交互。 当然， 为了实现发射端和接收端数据交互， 需要对无 线电能传输通道上传输信号的类型及时间进行控制。 另外， 为了避免单向无线 传输信道上产生信号干扰， 还可以采用发射端与接收端通过专用通讯信道传输 通讯信息， 所述专用通讯信道与所述无线电能传输信道不同。 发射端与接收端 通过专用通讯信道以有线或者无线方式进行信息传输。
当发射端 501接收到接收端 502发送的通讯信息时， 根据所述通讯信息对 发射端控制参数进行调节并在第一预定时间段内按照相应频率以硬开关方式控 制谐振电路工作。
本实施例所述系统中， 发射端利用软开关控制和硬开关控制相结合的方式 控制谐振电路工作， 保证发射端绝大多数时间工作在软开关状态下， 当动态负 载切换时控制发射端工作在硬开关状态， 在保证系统高效传输的情况下， 提高 了系统运行稳定性， 消除因动态负载切换引起的系统失谐。
上述仅为本发明的较佳实施例及所运用技术原理， 任何熟悉本技术领域的 技术人员在本发明揭露的技术范围内， 可轻易想到的变化或替换， 都应涵盖在 本发明的保护范围内。

Claims

权 利 要 求 书
1、 一种动态负载切换的控制方法， 其特征在于， 该方法包括- 发射端以软开关方式控制谐振电路工作；
当接收端将要进行负载切换时， 向发射端发送通讯信息；
当发射端接收到接收端发送的通讯信息时， 根据所述通讯信息对发射端控 制参数进行调节并在第一预定时间段内以硬开关方式控制谐振电路工作； 在所述第一预定时间段内， 接收端负载完成相应动作切换；
其中， 所述通讯信息包括接收端负载将要执行的切换动作指令， 所述第一 预定时间段指发射端接收到通讯信息至硬开关控制方式结束的时间。
2、 根据权利要求 1 所述的动态负载切换的控制方法， 其特征在于， 当所 述发射端在所述第一预定时间段内以硬开关方式控制谐振电路工作结束时， 发 射端切换成软开关方式控制谐振电路工作。
3、 根据权利要求 1 所述的动态负载切换的控制方法， 其特征在于， 当接 收端将要进行负载切换时， 根据第二预定时间段进行延时并在第三预定时间段 内将负载将要执行的切换动作指令发送到发射端； 当按照所述第二预定时间段 延时结束时， 负载响应相应切换动作；
其中， 所述第二预定时间段指接收端接收到切换动作指令至负载响应相应 切换动作的时间； 所述第三预定时间段指接收端接收到切换动作指令至将所述 切换动作指令发送到发射端的时间；
所述第二预定时间段小于所述第一预定时间段， 所述第三预定时间段小于 所述第二预定时间段。
4、 根据权利要求 1 所述的动态负载切换的控制方法， 其特征在于， 所述 发射端与接收端通过专用的通讯信道或者感应耦合信道传输通讯信息。
5、 根据权利要求 1 所述的动态负载切换的控制方法， 其特征在于， 当所 述发射端接收到接收端发送的通讯信息时， 根据所述通讯信息对发射端控制参 数进行调节并在第一预定时间段内按照相应频率以硬开关方式控制谐振电路工 作。
6、 一种动态负载切换的控制系统， 其特征在于， 所述系统包括发射端和 接收端， 发射端通过感应耦合通道向接收端传输电能，
其中， 发射端以软开关方式控制谐振电路工作； 当接收端将要进行负载切 换时， 向发射端发送通讯信息； 当发射端接收到接收端发送的通讯信息时， 根 据所述通讯信息对发射端控制参数进行调节并在第一预定时间段内以硬开关方 式控制谐振电路工作； 在所述第一预定时间段内， 接收端负载完成相应动作切 换；
其中， 所述通讯信息包括接收端负载将要执行的切换动作指令， 所述第一 预定时间段指发射端接收到通讯信息至硬开关控制方式结束的时间。
7、 根据权利要求 6 所述的动态负载切换的控制系统， 其特征在于， 当所 述发射端在所述第一预定时间段内以相应硬开关方式控制谐振电路工作结束 时， 发射端切换成软开关方式控制谐振电路工作。
8、 根据权利要求 6 所述的动态负载切换的控制系统， 其特征在于， 当接 收端将要进行负载切换时， 根据第二预定时间段进行延时并在第三预定时间段 内将所述负载将要执行的切换动作指令发送到发射端； 当按照所述第二预定时 间段延时结束时， 负载响应相应切换动作；
其中， 所述第二预定时间段指接收端接收到切换动作指令至负载响应相应 切换动作的时间； 所述第三预定时间段指接收端接收到切换动作指令至将所述 切换动作指令发送到发射端的时间；
所述第二预定时间段小于所述第一预定时间段， 所述第三预定时间段小于 所述第二预定时间段。
9、 根据权利要求 6 所述的动态负载切换的控制系统， 其特征在于， 所述 发射端与接收端通过专用的通讯信道或者感应耦合信道传输通讯信息。
10、 根据权利要求 6所述的动态负载切换的控制系统， 其特征在于， 当发 射端接收到接收端发送的通讯信息时， 根据所述通讯信息对发射端控制参数进 行调节并在第一预定时间段内按照相应频率以硬开关方式控制谐振电路工作。
PCT/CN2013/080792 2013-04-28 2013-08-05 动态负载切换的控制方法及系统 WO2014176840A1 (zh)

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