JP6402474B2 - スイッチング電源の制御装置 - Google Patents
スイッチング電源の制御装置 Download PDFInfo
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- JP6402474B2 JP6402474B2 JP2014088248A JP2014088248A JP6402474B2 JP 6402474 B2 JP6402474 B2 JP 6402474B2 JP 2014088248 A JP2014088248 A JP 2014088248A JP 2014088248 A JP2014088248 A JP 2014088248A JP 6402474 B2 JP6402474 B2 JP 6402474B2
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- 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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33538—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only of the forward type
- H02M3/33546—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only of the forward type with automatic control of the output voltage or current
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- 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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33571—Half-bridge at primary side of an isolation transformer
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- 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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33515—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with digital control
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- 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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33538—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only of the forward type
- H02M3/33546—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only of the forward type with automatic control of the output voltage or current
- H02M3/33553—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only of the forward type with automatic control of the output voltage or current with galvanic isolation between input and output of both the power stage and the feedback loop
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- 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
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0025—Arrangements for modifying reference values, feedback values or error values in the control loop of a converter
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- 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
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- 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
- H02M3/01—Resonant DC/DC converters
-
- 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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/3353—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having at least two simultaneously operating switches on the input side, e.g. "double forward" or "double (switched) flyback" converter
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- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Description
図10は従来の電流共振コンバータの構成例を示す図、図11は電流共振コンバータ部の入出力特性(スイッチング周波数依存性)を示す図である。
fr1=1/[2π√((Lr+Lm)*Cr)] …(1)
fr2=1/[2π√(Lr*Cr)] …(2)
図11において、スイッチング周波数が低い側の共振周波数fr1よりも低い場合は、スイッチング損失が大幅に増加してしまうことから、スイッチング周波数は、共振周波数fr1以上の範囲で使用される。また、高い側の共振周波数fr2では、入出力変換比GがG=1となり、1次側電圧がそのまま出力電圧に現れる。そして、高い側の共振周波数fr2より高い領域では、図11から分かるように、スイッチング周波数を変えても入出力変換比Gがほとんど変化せず、したがって、出力電圧もほとんど変化しないことから、実質的に出力電圧を制御することができない。
図3は本発明の目標値となる入出力特性を示す図、図4は本発明による理想的なゲイン変換器特性を示す図、図5は本発明による実用的なゲイン変換器特性を示す図である。
G(Ts)=a3*Ts^3+a2*Ts^2+a1*Ts+a0 …(4)
ここで、a0、a1、a2、a3は係数、Tsはスイッチング周期である。なお、A^Bは、AのB乗を意味する。なお、式(4)の近似式の係数a0、a1、a2、a3は、式(3)のうち、おおよそ共振周期Tr1〜Tr2のTsの範囲について表計算ソフトでグラフ化し、さらに表計算ソフトの近似曲線機能を使うことによって求めることができる。
Ts=G1*Dnb,Dnb=Dna …(5)
Ga(Ts)=Ga(G1*G2*Dna)=Ga(G1*Dna)
=c3*Dna^3+c2*Dna^2+c1*Dna+c0 …(6)
なお、係数c0〜c3は、c0=a0、c1=a1*G1、c2=a2*G1^2、c3=a3*G1^3である。
Ga_ideal=d1*Dna+d0 …(7)
で表される。なお、d0,d1は係数である。
Ga_ideal=c3*Dnb^3+c2*Dnb^2+c1*Dnb+c0…(8)
この式(8)と先に求めた4つの目標ゲイン特性Ga_ideal(Ga_ideal3,Ga_ideal4,Ga_ideal5,Ga_ideal6)とにより、各目標ゲイン特性Ga_idealに対応する非線形ゲイン特性の出力信号Dnb(Dnb3,Dnb4,Dnb5,Dnb6)が求められる。これらの出力信号Dnbは、具体的には、数値解析ソフトを使って求めている。
Dnb=e3*Dna^3+e2*Dna^2+e1*Dna+e0 …(9)
この式(9)で下記のように連立方程式を立てることにより、係数e3,e2,e1,e0が求まり、図4の曲線を表す式を決定することができる。なお、理想特性を求めた入力範囲を超える入力に対しては、ゲイン変換器24は線形としており、トータルでは、図4のような非線形の特性となる。
Dnb1=e3*Dna1^3+e2*Dna1^2+e1*Dna1+e0…(10)
Dnb2=e3*Dna2^3+e2*Dna2^2+e1*Dna2+e0…(11)
Dnb3=e3*Dna3^3+e2*Dna3^2+e1*Dna3+e0…(12)
Dnb4=e3*Dna4^3+e2*Dna4^2+e1*Dna4+e0…(13)
これらの演算結果より、ゲイン変換器24と周波数生成器25と電流共振コンバータ部10とを組み合わせたゲイン特性Gaを線形、または、それに準じた特性とすることができる。
図6は周波数生成器の構成例を示す図、図7は線形なゲイン変換器を用いた場合の出力電圧の応答特性の波形例を示す図であって、(a)は電流共振コンバータ部のゲインが低く、(b)は高い場合を示し、図8は非線形なゲイン変換器を用いた場合の出力電圧の応答特性波形を示す図であって、(a)は電流共振コンバータ部のゲインが低く、(b)は高い場合を示している。
この第2の実施の形態によれば、制御部20は、トランスTの2次側の信号を1次側に伝達する絶縁器22として、絶縁アンプを用い、その絶縁器22に電流共振コンバータ部10の直流出力電圧Voutが直接入力されるよう配置されている。出力電圧検出器21には、絶縁器22の出力が入力されて、目標電圧との誤差の誤差信号Veを出力する。出力電圧検出器21の出力は、A/D変換器23に入力され、ここでアナログ値の誤差信号Veをデジタル信号Deに変換する。A/D変換器23の出力は、デジタル演算器27に入力され、ここで直流出力電圧Voutを出力電圧設定値の電圧に収束させるための制御演算が行われる。デジタル演算器27としては、PI(比例・積分)制御またはPID(比例・積分・微分)制御を行う演算器が用いられる。デジタル演算器27の出力は、ゲイン変換器24に入力され、入力信号Dnaをゲイン変換器24に設定されたゲイン特性に応じて変換し、出力信号Dnbを出力する。ゲイン変換器24の出力は、周波数生成器25に入力され、周波数生成器25では、ゲイン変換器24の出力信号Dnbに応じたスイッチング周期Tsを有するパルス波形信号が生成される。周波数生成器25の出力は、駆動部26に入力され、駆動部26では、2つのスイッチング素子M1,M2を制御する制御信号Vg1,Vg2が出力される。
Dnb=Dnbi+(Dnb(i+1)−Dnbi)*(Dna−Dnai)/(Dna(i+1)−Dnai)
で求めることができる。これにより、共振コンバータの制御精度をさらに高める場合に、変換のための演算を複雑にすることなく、さらに高次の非線形ゲイン特性を容易に実現することができる。
20 制御部
21 出力電圧検出器
22 絶縁器
23 A/D変換器(アナログ−デジタル変換器)
24 ゲイン変換器
25 周波数生成器
26 駆動部
27 デジタル演算器
31 第1の比較器
32 乗算器
33 第2の比較器
34 発振器
35 カウンタ
Claims (5)
- 電流共振コンバータ部を備えたスイッチング電源の制御装置において、
前記電流共振コンバータ部の直流出力電圧と目標電圧との誤差を検出して誤差信号を出力する出力電圧検出器と、
前記出力電圧検出器が検出した前記誤差信号をデジタル信号に変換するアナログ−デジタル変換器と、
前記アナログ−デジタル変換器から出力されるデジタル信号を入力とするゲイン変換器と、
前記ゲイン変換器から出力されるデジタル信号に比例して前記スイッチング電源のスイッチング周期を決定する出力信号周期を変化させ、かつデューティー比50%の矩形波信号となる出力信号を生成する周波数生成器と、
を備え、
前記ゲイン変換器の入力に対する出力のゲイン特性として、設定した入力範囲において、前記ゲイン変換器の入力に対する前記電流共振コンバータ部の入出力特性の非線形性を打ち消すような非線形ゲイン特性が設定されていることを特徴とするスイッチング電源の制御装置。 - 前記ゲイン変換器は、ゲイン変換を行う周期範囲に対して前記非線形ゲイン特性に近似したゲインが連続的に設定されていることを特徴とする請求項1記載のスイッチング電源の制御装置。
- 前記ゲイン変換器は、ゲイン変換を行う周期範囲を複数の領域に分割し、それぞれの領域に対して前記非線形ゲイン特性に近似したゲインが離散的に設定されていることを特徴とする請求項1記載のスイッチング電源の制御装置。
- 前記ゲイン変換器は、それぞれの領域に設定されるゲインは、基本ゲインの2のN乗(Nは整数)となるように設定されていることを特徴とする請求項3記載のスイッチング電源の制御装置。
- 前記アナログ−デジタル変換器と前記ゲイン変換器との間に設置され、前記アナログ−デジタル変換器から出力されるデジタル信号に応じて比例・積分または比例・積分・微分制御の演算を行うデジタル演算装置をさらに備えていることを特徴とする請求項1記載のスイッチング電源の制御装置。
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AT516902A1 (de) * | 2015-03-09 | 2016-09-15 | Fronius Int Gmbh | Resonanzwandler mit einem Transformator mit Mittelpunktanzapfung |
US9723661B2 (en) * | 2015-05-01 | 2017-08-01 | GE Lighting Solutions, LLC | Systems and methods for powering a microprocessor from an isolated secondary side to enable off-line communication on an LED driver |
JP6706533B2 (ja) * | 2016-04-14 | 2020-06-10 | 株式会社アイ・ライティング・システム | Led電源装置 |
US10326370B2 (en) * | 2016-06-02 | 2019-06-18 | Semiconductor Components Industries, Llc | Controlling output voltage for power converter |
US10277140B2 (en) * | 2017-08-31 | 2019-04-30 | Google Llc | High-bandwith resonant power converters |
CN109951062B (zh) * | 2017-12-21 | 2022-07-26 | 雅达电子国际有限公司 | 谐振转换器及用于谐振转换器的控制方法 |
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- 2014-04-22 JP JP2014088248A patent/JP6402474B2/ja not_active Expired - Fee Related
- 2014-06-13 US US14/303,948 patent/US9729069B2/en not_active Expired - Fee Related
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US9729069B2 (en) | 2017-08-08 |
JP2015039284A (ja) | 2015-02-26 |
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US20150023066A1 (en) | 2015-01-22 |
CN104300798A (zh) | 2015-01-21 |
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