JP6519238B2 - 電流検出回路 - Google Patents
電流検出回路 Download PDFInfo
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- JP6519238B2 JP6519238B2 JP2015047970A JP2015047970A JP6519238B2 JP 6519238 B2 JP6519238 B2 JP 6519238B2 JP 2015047970 A JP2015047970 A JP 2015047970A JP 2015047970 A JP2015047970 A JP 2015047970A JP 6519238 B2 JP6519238 B2 JP 6519238B2
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- 238000001514 detection method Methods 0.000 title claims description 30
- 238000006243 chemical reaction Methods 0.000 claims description 101
- 230000000737 periodic effect Effects 0.000 claims description 13
- 238000005070 sampling Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 description 12
- 238000012935 Averaging Methods 0.000 description 8
- 230000002159 abnormal effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000005856 abnormality Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
- H02P25/06—Linear motors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
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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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
- Inverter Devices (AREA)
- Electronic Switches (AREA)
Description
を備えることを特徴とする。
D1 ダイオード
R1 電流検出抵抗
E 電源
L ソレノイド
11 目標電流値入力部
12 オペアンプ
13 A/D変換部
14,14A 移動平均演算部
15 比較器
16 制御部
141 FIFOバッファ
142,143,144 加算器
145 セレクタ
146 レジスタ
147 除算器
148 CPU
149 RAM
150 プログラム用メモリ
Claims (1)
- ソレノイドに流れる電流を検出する検出部と、
前記ソレノイドに電流を流すためのスイッチング素子を所定のPWM周期でPWM制御する制御部と、
前記検出部で検出された電流値を前記所定のPWM周期のn倍の周期でサンプリングしアナログデジタル変換することによりPWM周期毎にn回のAD変換値を出力するA/D変換部と、
前記A/D変換部からのn回のAD変換値を記憶するFIFOバッファを有する移動平均演算部と、を備え、
前記移動平均演算部は、過去のn回のAD変換値を加算した加算結果から前記FIFOバッファからの最も古い1回のAD変換値を減算して得られる(n−1)回のAD変換値に対し、前記A/D変換部からの最新の1回のAD変換値を加算してn回のAD変換値の移動平均用総和値を得、当該移動平均用総和値をnで除算することにより移動平均値を演算し、
前記移動平均演算部は、
前記A/D変換部からのn回のAD変換値を記憶するFIFOバッファと、
過去のn回のAD変換値を加算した加算結果を記憶するレジスタと、
前記レジスタからのn回のAD変換値を加算した加算結果から、前記FIFOバッファからの最も古い1回のAD変換値を減算して(n−1)回のAD変換値を得る第1の加算器と、
前記第1の加算器からの(n−1)回のAD変換値に前記A/D変換部からの最新の1回のAD変換値を加算してn回のAD変換値の移動平均用総和値を得る第2の加算器と、
前記第2の加算器からの移動平均用総和値をnで除算することにより移動平均値を演算する除算器と、
前記所定のPWM周期毎に、前記A/D変換部からのn回のAD変換値を加算して得られた周期平均用総和値を出力する第3の加算器と、
前記所定のPWM周期の最後に、前記第2の加算器からの移動平均用総和値を前記第3の加算器で得られた周期平均用総和値に置き換える補正部と、
を備えることを特徴とする電流検出回路。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2015047970A JP6519238B2 (ja) | 2015-03-11 | 2015-03-11 | 電流検出回路 |
PCT/JP2016/054337 WO2016143465A1 (ja) | 2015-03-11 | 2016-02-15 | 電流検出回路及びソレノイド駆動装置 |
Applications Claiming Priority (1)
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---|---|---|---|
JP2015047970A JP6519238B2 (ja) | 2015-03-11 | 2015-03-11 | 電流検出回路 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2016169955A JP2016169955A (ja) | 2016-09-23 |
JP6519238B2 true JP6519238B2 (ja) | 2019-05-29 |
Family
ID=56879410
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2015047970A Active JP6519238B2 (ja) | 2015-03-11 | 2015-03-11 | 電流検出回路 |
Country Status (2)
Country | Link |
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JP (1) | JP6519238B2 (ja) |
WO (1) | WO2016143465A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021261000A1 (ja) * | 2020-06-24 | 2021-12-30 | 日立Astemo株式会社 | 車載制御装置 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000179667A (ja) * | 1998-12-18 | 2000-06-27 | Hitachi Ltd | 自動車用油圧制御装置及び制御方法 |
JP2003219690A (ja) * | 2002-01-24 | 2003-07-31 | Meidensha Corp | Pwmインバータの出力電流検出方式 |
JP4738287B2 (ja) * | 2006-09-01 | 2011-08-03 | 株式会社カワデン | モータの過電流検出回路 |
EP2235561B8 (en) * | 2007-12-21 | 2017-05-31 | Leddartech Inc. | Detection and ranging methods and systems |
JP5691883B2 (ja) * | 2011-06-29 | 2015-04-01 | 株式会社デンソー | 負荷駆動回路 |
-
2015
- 2015-03-11 JP JP2015047970A patent/JP6519238B2/ja active Active
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2016
- 2016-02-15 WO PCT/JP2016/054337 patent/WO2016143465A1/ja active Application Filing
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Publication number | Publication date |
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JP2016169955A (ja) | 2016-09-23 |
WO2016143465A1 (ja) | 2016-09-15 |
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