JP5180714B2 - 負荷短絡保護回路 - Google Patents
負荷短絡保護回路 Download PDFInfo
- Publication number
- JP5180714B2 JP5180714B2 JP2008186257A JP2008186257A JP5180714B2 JP 5180714 B2 JP5180714 B2 JP 5180714B2 JP 2008186257 A JP2008186257 A JP 2008186257A JP 2008186257 A JP2008186257 A JP 2008186257A JP 5180714 B2 JP5180714 B2 JP 5180714B2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- load
- short
- potential
- motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/0833—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for electric motors with control arrangements
- H02H7/0844—Fail safe control, e.g. by comparing control signal and controlled current, isolating motor on commutation error
Description
・・・式(1)
20 制御回路
21 発振回路
22 短絡検出回路
23 ラッチ回路
24 分周回路
25 ゲートコントロール回路
30a、30b、30c 検知回路
31 分周回路
32 定電流源回路
C1 容量素子
COMP 比較器
Q1〜Q4、Q6 NMOSトランジスタ
Q5 PMOSトランジスタ
R1 抵抗素子
Claims (5)
- 誘導性の負荷を電源に対して時間的に断続して接続するスイッチ素子と、
前記スイッチ素子が前記負荷を電源に対して接続してから所定時間経過後において、前記スイッチ素子の前記負荷への接続点の電位を検知する検知回路と、
前記検知した接続点の電位に応じて前記負荷への電源供給を遮断するように前記スイッチ素子を制御する制御回路と、
容量素子を含む充放電回路と、
を備え、
前記検知回路は、前記接続点の電位と所定の電位とを比較する比較回路を備え、前記比較回路の比較結果によって前記接続点の電位を検知し、
前記スイッチ素子が前記負荷を電源に対して接続してから前記容量素子に対する充放電を開始した後、前記比較回路は、前記容量素子における充放電端の電位を前記所定の電位として比較対象とする負荷短絡保護回路。 - 前記制御回路は、前記負荷が短絡状態にあると判断される範囲に前記接続点の電位がある場合に、前記負荷への電源供給を遮断するように前記スイッチ素子を制御する請求項1記載の負荷短絡保護回路。
- 前記充放電回路は、定電流源回路を備え、前記定電流源回路からの電流によって前記容量素子に対し充放電を行う請求項1または2記載の負荷短絡保護回路。
- 前記充放電回路は、抵抗素子を備え、電源から前記抵抗素子を介した電流によって前記容量素子に対し充放電を行う請求項1または2記載の負荷短絡保護回路。
- 前記負荷はモータであって、請求項1乃至4のいずれか一に記載の負荷短絡保護回路を備えるモータ駆動装置。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008186257A JP5180714B2 (ja) | 2008-07-17 | 2008-07-17 | 負荷短絡保護回路 |
US12/458,270 US8264280B2 (en) | 2008-07-17 | 2009-07-07 | Load driving circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008186257A JP5180714B2 (ja) | 2008-07-17 | 2008-07-17 | 負荷短絡保護回路 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2010028961A JP2010028961A (ja) | 2010-02-04 |
JP5180714B2 true JP5180714B2 (ja) | 2013-04-10 |
Family
ID=41530105
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2008186257A Expired - Fee Related JP5180714B2 (ja) | 2008-07-17 | 2008-07-17 | 負荷短絡保護回路 |
Country Status (2)
Country | Link |
---|---|
US (1) | US8264280B2 (ja) |
JP (1) | JP5180714B2 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010040184A1 (de) * | 2010-09-02 | 2012-03-08 | Robert Bosch Gmbh | Schaltungsanordnung zum pulsweitenmodulierten Ansteuern eines Elektromotors |
JP5567956B2 (ja) * | 2010-09-16 | 2014-08-06 | 矢崎総業株式会社 | 複数組電池のセル電圧均等化装置 |
JP5653975B2 (ja) * | 2012-08-27 | 2015-01-14 | 株式会社東海理化電機製作所 | モータ制御装置 |
JP6379509B2 (ja) * | 2014-02-18 | 2018-08-29 | セイコーエプソン株式会社 | 回路装置及び電子機器 |
FR3087897B1 (fr) * | 2018-10-26 | 2021-05-07 | Continental Automotive France | Procede d'alimentation d'une charge inductive |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3020038B2 (ja) * | 1991-04-16 | 2000-03-15 | 光洋精工株式会社 | 電動パワーステアリング装置 |
JPH0787771A (ja) | 1993-09-14 | 1995-03-31 | Omron Corp | モータ速度・位置推定装置 |
US5563479A (en) * | 1993-10-29 | 1996-10-08 | Aisin Seiki Kabushiki Kaisha | Power supply apparatus for electric vehicle |
JP3188806B2 (ja) * | 1994-04-04 | 2001-07-16 | 三菱電機株式会社 | 直流モータ回転不良検出装置および直流モータ駆動装置 |
CN1042993C (zh) * | 1994-05-12 | 1999-04-14 | 株式会社小松制作所 | 负载驱动装置 |
TW328190B (en) * | 1994-06-14 | 1998-03-11 | Toshiba Co Ltd | Control device of brushless motor and method of fault detection and air conditioner |
JPH08107697A (ja) * | 1994-10-04 | 1996-04-23 | Hitachi Home Tec Ltd | Dcファンモータの異常検出回路 |
JP3518944B2 (ja) * | 1996-04-11 | 2004-04-12 | 三菱電機株式会社 | モータ駆動装置 |
JP3706515B2 (ja) * | 1998-12-28 | 2005-10-12 | 矢崎総業株式会社 | 電源供給制御装置および電源供給制御方法 |
TW576008B (en) * | 2002-09-10 | 2004-02-11 | Richtek Technology Corp | High-voltage side short-circuit protection apparatus and method for DC/DC converter |
JP3966194B2 (ja) * | 2003-03-17 | 2007-08-29 | 株式会社デンソー | モータ制御装置 |
US7482793B2 (en) * | 2006-09-11 | 2009-01-27 | Micrel, Inc. | Ripple generation in buck regulator using fixed on-time control to enable the use of output capacitor having any ESR |
US7443148B2 (en) * | 2006-09-11 | 2008-10-28 | Micrel, Inc. | Constant on-time regulator with increased maximum duty cycle |
JP4765900B2 (ja) * | 2006-11-07 | 2011-09-07 | 船井電機株式会社 | ディスク装置 |
US7889011B2 (en) * | 2008-06-30 | 2011-02-15 | Texas Instruments Incorporated | Output short circuit and load detection |
-
2008
- 2008-07-17 JP JP2008186257A patent/JP5180714B2/ja not_active Expired - Fee Related
-
2009
- 2009-07-07 US US12/458,270 patent/US8264280B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JP2010028961A (ja) | 2010-02-04 |
US8264280B2 (en) | 2012-09-11 |
US20100014196A1 (en) | 2010-01-21 |
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