JP6758420B2 - アイソレータ回路 - Google Patents
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
- H03K17/689—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors with galvanic isolation between the control circuit and the output circuit
- H03K17/691—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors with galvanic isolation between the control circuit and the output circuit using transformer coupling
-
- 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
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static 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
- H02M3/33507—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
-
- 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
- H02M3/33523—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 galvanic isolation between input and output of both the power stage and the feedback loop
-
- 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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
- H03K17/082—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit
- H03K17/0822—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit in field-effect transistor switches
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/18—Modifications for indicating state of switch
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital 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
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0012—Control circuits using digital or numerical techniques
-
- 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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
- H03K2017/0806—Modifications for protecting switching circuit against overcurrent or overvoltage against excessive temperature
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K5/156—Arrangements in which a continuous pulse train is transformed into a train having a desired pattern
- H03K5/1565—Arrangements in which a continuous pulse train is transformed into a train having a desired pattern the output pulses having a constant duty cycle
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Theoretical Computer Science (AREA)
- Dc Digital Transmission (AREA)
- Power Conversion In General (AREA)
- Electronic Switches (AREA)
Description
図1は、実施の形態1に係るアイソレータ回路1の機能ブロックの一例を示す図である。図1に示されるように、アイソレータ回路1においては、端子P1に入力された入力パルス信号S1が端子P2に出力パルス信号S2として伝達される。アイソレータ回路1においては、出力パルス信号S2が端子P3に帰還パルス信号S4として伝達される。アイソレータ回路1は、制御信号生成回路11と、信号伝達回路12と、比較回路42とを備える。図1に示される1次回路とは、トランス31,32によって、出力パルス信号S2が伝達される端子P3と直流的に絶縁されている側の回路を意味する。2次回路とは、トランス31,32によって、入力パルス信号S1が入力される端子P1と直流的に絶縁されている側の回路を意味する。
信号伝達の正確性という観点から、入力パルス信号のデューティ比と出力パルス信号のデューティ比とは等しいことが望ましい。すなわち、入力パルス信号と出力パルス信号との対応関係は、図6に示されるような原点を通る傾き1の直線L10として表せることが望ましい。しかし、入力パルス信号のデューティ比と出力パルス信号のデューティ比との対応関係を表す直線の傾きには線形性誤差が生じる場合がある。すなわち、入力パルス信号のデューティ比と出力パルス信号のデューティ比との対応関係は、アイソレータの特性によって生じるノイズなどより、図7に示されるような傾きが1より小さい直線L11、あるいは傾きが1より大きい直線L12として表される場合がある。
実施の形態2においては、制御信号生成回路が、メモリに保存された補正データを用いて入力パルス信号を補正するとともに、補正データをメモリに保存する場合について説明した。実施の形態2の変形例においては、アイソレータ回路の動作モードに、通常モードおよびテストモードが含まれる場合について説明する。通常モードにおいては、制御信号生成回路が、メモリに保存された補正データを用いて入力パルス信号を補正する。テストモードにおいては、制御信号生成回路が補正データをメモリに保存する。
本発明に係るアイソレータ回路のADCは、アイソレータ回路とは別の回路が含むADCであってもよい。たとえばパワー半導体の制御を行なう回路においては、通常の半導体プロセスによる回路よりも大きな電圧および電流が取り扱われることになる。パワー半導体の制御を行なう回路においては異常な温度上昇を検出するために、図12に示されるような温度検出回路70が搭載されていることが多い。温度検出回路70は、定電流源CS1と、ダイオードD1と、ADC42とを備える。ダイオードD1のアノードは、定電流源CS1に接続されている。ダイオードD1のカソードは、接地されている。定電流源CS1からダイオードD1に電流が供給される。温度によってダイオードD1の順方向下降電圧が変化する。ADC42は、順方向下降電圧をデジタル信号に変換して出力する。
実施の形態3においては、ADCの入力の接続先および出力の接続先の各々をスイッチによって切り替えることにより、アイソレータ回路からADCを分離して他の回路の構成要素として機能させるか否かを制御する場合について説明した。実施の形態3の変形例においては、ADCの入力の接続先および帰還パルス信号が出力される端子の接続先の各々をスイッチによって切り替えることにより、アイソレータ回路からADCを分離して他の回路の構成要素として機能させるか否かを制御する場合について説明する。
Claims (10)
- 第1端子に入力された第1入力パルス信号が第2端子に出力パルス信号として伝達されるとともに、前記出力パルス信号が第3端子に帰還パルス信号として伝達されるアイソレータ回路において、
前記第1端子と前記第2端子とを直流的に絶縁し、前記第1入力パルス信号を受けて前記出力パルス信号を前記第2端子に出力するように構成された第1アイソレータ部と、
前記出力パルス信号のデューティ比に対応するデジタル信号を出力するように構成されたAD変換部と、
前記第2端子と前記第3端子とを直流的に絶縁し、前記デジタル信号を受けて前記帰還パルス信号を前記第3端子に出力するように構成された第2アイソレータ部と、
前記第1入力パルス信号の後に第2入力パルス信号を前記第1端子に出力するように構成された制御信号生成回路と、
前記第1入力パルス信号と前記帰還パルス信号との比較結果を前記制御信号生成回路に出力するように構成された比較回路とを備え、
前記制御信号生成回路は、前記比較結果を用いて前記第2入力パルス信号の第2デューティ比を決定するように構成されている、アイソレータ回路。 - 前記比較結果は、前記第1入力パルス信号の第1デューティ比と前記帰還パルス信号との差分を含み、
前記制御信号生成回路は、前記第1デューティ比に前記差分を加えた値を前記第2デューティ比とするように構成されている、請求項1に記載のアイソレータ回路。 - 前記制御信号生成回路は、メモリを含み、前記第1デューティ比と前記比較結果とを関連付けて前記メモリに保存するように構成されている、請求項2に記載のアイソレータ回路。
- 前記アイソレータ回路は、第1および第2動作モードを有し、
前記制御信号生成回路は、
前記第1動作モードにおいて、前記第1入力パルス信号を出力するとともに、前記第1デューティ比と前記比較結果とを関連付けて前記メモリに保存し、
前記第2動作モードにおいて、前記比較結果を用いて前記第2デューティ比を決定し、前記第2入力パルス信号を出力するように構成されている、請求項3に記載のアイソレータ回路。 - 前記制御信号生成回路は、前記第1動作モードにおいて、前記第1入力パルス信号を含み、デューティ比が互いに異なる複数の第1入力パルス信号を出力するように構成されている、請求項4に記載のアイソレータ回路。
- 前記AD変換部は、前記第1アイソレータ部から前記出力パルス信号を受ける入力端子と、前記デジタル信号を出力する出力端子とを含み、
前記アイソレータ回路は、
第1回路と、
前記第1入力パルス信号が出力された場合、前記入力端子と前記第1アイソレータ部とを接続させ、前記第2入力パルス信号が出力された場合、前記入力端子と前記第1回路とを接続させるように構成された第1スイッチとをさらに備える、請求項1〜請求項5のいずれか1項に記載のアイソレータ回路。 - 第2回路と、
前記第1入力パルス信号が出力された場合、前記出力端子と前記第2アイソレータ部とを接続させ、前記第2入力パルス信号が出力された場合、前記出力端子と前記第2回路とを接続させるように構成された第2スイッチとをさらに備える、請求項6に記載のアイソレータ回路。 - 第2回路と、
前記第1入力パルス信号が出力された場合、前記第3端子と前記比較回路とを接続させ、前記第2入力パルス信号が出力された場合、前記第3端子と前記第2回路とを接続させるように構成された第2スイッチとをさらに備える、請求項6に記載のアイソレータ回路。 - 第1および第2アイソレータ部の各々は、トランスを含む、請求項1〜請求項8のいずれか1項に記載のアイソレータ回路。
- 第1および第2アイソレータ部の各々は、フォトカプラを含む、請求項1〜請求項8のいずれか1項に記載のアイソレータ回路。
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US9847705B2 (en) * | 2012-08-06 | 2017-12-19 | Peter Oaklander | Regulator using smart partitioning |
ITTO20130579A1 (it) * | 2013-07-10 | 2015-01-11 | Osram Gmbh | Procedimento per la trasmissione di segnali e relativo dispositivo |
JP6285235B2 (ja) * | 2014-03-25 | 2018-02-28 | ローム株式会社 | デジタル制御電源回路の制御回路、制御方法およびそれを用いたデジタル制御電源回路、ならびに電子機器および基地局 |
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2017
- 2017-01-18 US US16/475,827 patent/US10749524B2/en not_active Expired - Fee Related
- 2017-01-18 JP JP2018562787A patent/JP6758420B2/ja not_active Expired - Fee Related
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EP3573236A4 (en) | 2020-01-22 |
JPWO2018134920A1 (ja) | 2019-11-07 |
US20190334521A1 (en) | 2019-10-31 |
WO2018134920A1 (ja) | 2018-07-26 |
US10749524B2 (en) | 2020-08-18 |
EP3573236A1 (en) | 2019-11-27 |
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