WO2004109887A1 - 逆起電力防止ユニット - Google Patents
逆起電力防止ユニット Download PDFInfo
- Publication number
- WO2004109887A1 WO2004109887A1 PCT/JP2004/007645 JP2004007645W WO2004109887A1 WO 2004109887 A1 WO2004109887 A1 WO 2004109887A1 JP 2004007645 W JP2004007645 W JP 2004007645W WO 2004109887 A1 WO2004109887 A1 WO 2004109887A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- electromotive force
- battery
- back electromotive
- diode
- circuit
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/045—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere
- H02H9/047—Free-wheeling circuits
Definitions
- the present invention relates to a back electromotive force prevention unit of a DC power supply that absorbs back electromotive force generated in an inductive load.
- a rechargeable secondary battery is usually used as the vehicle battery.
- Fig. 12 shows the battery and in-vehicle equipment as electric circuits.
- reference numeral 20 denotes a battery
- 21 denotes a cell motor
- 22 denotes electric components
- 23 denotes a generator
- 24 denotes a starter switch
- 25 denotes a rectifying diode
- 26 denotes an electromotive force of a charging generator 23. Shows an automatic on / off switch that automatically turns on when the battery voltage exceeds the battery voltage.
- the load of the battery 20 includes the cell motor 21 and the electrical component 22.
- the inductance component (inductive load) is included not only in the cell motor 21 but also in the car air conditioner, the car audio and the like in the electrical component 22. ) Exists. A back electromotive force is generated from these inductance components, which becomes noise and is superimposed on the output terminal voltage.
- the charging generator 23 since the plus side of the charging generator 23 is turned on and off by the automatic on / off switch 26 while monitoring the voltage of the battery 20, the charging generator 23 is turned off when it is off.
- the open coil L makes it difficult to absorb the generated back EMF.
- the back electromotive force due to such an inductance component appears as a disturbing noise to the power of audio and radio, and also causes power flickering of television images.
- the noise by the capacitor 2 2 4 Attenuates harmonic components and attenuates noise between the battery power sources generated by switching of the switching element 202 with the LC filter composed of the inductance 222 and the electrolytic capacitor 222, and the inductance 222
- the amount of noise generated when the switching element 202 is turned off is reduced, and the voltage fluctuation between the battery power supplies is reduced by the electrolytic capacitor 222 (see, for example, Japanese Patent Application Laid-Open No. 7-2837). See No. 97).
- a noise filter using a capacitor inductance can only remove harmonic components or components of a specific frequency, and the effect of suppressing a high peak back EMF is low.
- the present invention has been made in view of such circumstances, and is configured such that power is supplied from a DC power source such as a battery to a load including an inductive load via a circuit element or a circuit portion that performs a switching operation.
- a DC power source such as a battery
- a load including an inductive load via a circuit element or a circuit portion that performs a switching operation.
- a reverse voltage prevention unit capable of preventing a circuit element or a circuit portion performing the switching operation from generating noise due to a back electromotive force generated by an inductive load during the switching operation.
- a back electromotive force prevention unit is supplied with power from a DC power supply such as a battery to a load including an inductive load via a circuit element or a circuit portion that performs a switching operation.
- a DC power supply such as a battery
- a load including an inductive load via a circuit element or a circuit portion that performs a switching operation.
- An electromotive force prevention unit comprising: a diode connected in parallel to an output terminal of the DC power supply for absorbing a back electromotive force generated by the inductive load; and a capacitor connected in parallel to the diode.
- the back electromotive force prevention unit power is supplied from a DC power supply such as a battery to a load including an inductive load via a circuit element or a circuit portion that performs a switching operation.
- a back electromotive force prevention unit having a diode connected in parallel to an output terminal of the DC power supply for absorbing a back electromotive force generated by the inductive load and a capacitor connected in parallel to the diode is mounted. Accordingly, it is possible to effectively prevent the generation of noise due to the back electromotive force generated by the inductive load during the switching operation of the circuit element or the circuit portion that performs the switching operation.
- the back electromotive force prevention unit comprises a backflow prevention diode between a positive lead wire and a negative lead wire connected to a positive terminal and a negative terminal of a DC power source, respectively. And a fuse element that blows due to overcurrent is connected in series, and a back electromotive force prevention unit of a battery in which a capacitor is connected in parallel with the backflow prevention diode is provided.
- crimp terminals may be provided at ends of the positive lead wire and the negative lead wire.
- the back electromotive force prevention unit for example, by installing a reverse voltage absorption diode in a vehicle-mounted battery, noise is quickly suppressed, and unnecessary current is prevented from flowing back to electrical components. can do. As a result, the electrical components operate properly, and the entire vehicle can be operated smoothly. It also has the effect of reducing the noise of FM radio installed in vehicles, improving sound quality, and reducing noise of AM radio. In addition, the shift shock of automatic vehicles is eliminated, the vehicle becomes quieter, and fuel efficiency is improved.
- FIG. 1 is a circuit diagram showing a configuration of an audio circuit to which the present invention is applied.
- FIG. 2 is a diagram showing a circuit in which the amplifier of the audio circuit shown in FIG. 1 is replaced with a switch, and a battery is inserted on the secondary side of the transformer instead of inputting an AC signal to the transformer.
- FIG. 3 is a diagram showing a potential waveform at a point A when the switch 4 turns on and off in the circuit shown in FIG.
- FIG. 4 is a diagram showing a circuit obtained by removing the diode D2 from the circuit shown in FIG.
- FIG. 5 is a diagram showing a circuit in which the capacitor C1 and the diode D2 are removed from the circuit shown in FIG.
- FIGS. 6A and 6B are waveform diagrams showing a change in potential at point A when switch 4 is turned on and off in the circuit shown in FIG.
- FIG. 6C is a waveform diagram showing a change state of the potential at point C when switch 4 is turned on and off in the circuit shown in FIG.
- FIG. 7 is a diagram showing a circuit in which the capacitor C1 is removed from the circuit shown in FIG. 2 and the diode D2 is left.
- FIGS. 8A and 8B are waveform diagrams showing a change in potential at point A when switch 4 is turned on and off in the circuit shown in FIG.
- FIG. 9 is a diagram showing a configuration example of a switching power supply to which the present invention is applied.
- FIG. 10 is a diagram showing the appearance of the back electromotive force prevention unit according to the embodiment of the present invention.
- FIG. 11 is a circuit diagram showing a state where the back electromotive force prevention unit according to the present invention is connected to a battery.
- FIG. 12 is an electric circuit diagram of a vehicle-mounted battery and a vehicle-mounted device.
- FIG. 13 is a circuit diagram showing an example of a conventional noise filter. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 shows the configuration of an audio circuit to which the present invention is applied.
- an audio circuit to which the present invention is applied includes a transformer 1 having input terminals 50 and 51 to which an input signal is applied. And a diode D 1 connected to the secondary side of the transformer and rectifying an input AC signal, a smoothing capacitor C 1, an amplifier 2, and a speaker 3. Further, a diode D2 for absorbing a back electromotive force is connected in parallel to the smoothing capacitor C1.
- FIG. 2 shows the voltage waveform at point A on the force side of the diode D 1 when the switch 4 is turned on and off.
- the switch 4 when the switch 4 is switched from the off state to the on state at time t1, for example, the electromotive force of the battery 5 has a ten-point polarity with respect to the driving coil 3a of the speaker 3, and the D point side has a ten polarity.
- the capacitor C1 is charged so that the point B has a positive polarity and the point A has a single polarity because the voltage is applied so that the point C, which is the switch 4 side, has a negative polarity.
- the potential at the point A starts to decrease in the negative direction from 0 V and decreases to a predetermined level.
- the electric charge stored in the capacitor C1 is discharged through the diode D2 and the driving coil 3a, so that the potential at the point A rises and returns to the original potential at time t2.
- the switch 4 when the switch 4 is switched from the on state to the off state at the time t3, the point C of the drive coil 3a has one polarity with respect to the drive coil 3a, and the point D of the drive coil 3a has a sufficient polarity.
- Back electromotive force is generated so that the current flows into the capacitor C1 from the point A side via the diode D2, so that the capacitor C1 has a positive polarity on the point A side and a positive polarity on the point B. Is charged to the polarity of
- the potential at point A starts to rise in the positive direction from 0 V and rises to a predetermined level. Thereafter, the electric charge stored in the capacitor C1 is discharged through the diode Dl and the secondary winding of the transformer 1 so as to be returned to the battery 5 as a power supply, and is also discharged through the diode D2. You. As a result, the potential at point A starts to fall and returns to the 0 V level at time t4.
- the switch 4 is turned on and off, as shown in Fig. 3
- the potential at the point A is temporarily changed by the function of the capacitor C1 for smoothing and the diode D2 for absorbing the back electromotive force. It changes slowly as it rises or falls.
- FIG. 4 shows a circuit in which the diode D2 is removed from the circuit shown in FIG.
- switch 4 was turned on and off with this circuit, the potential waveform at point A was almost the same as in Fig. 3.
- FIG. 5 shows a circuit in which the capacitor C1 and the diode D2 are removed from the circuit shown in FIG.
- FIGS. 6A to 6C show waveforms indicating the state of change in potential at points A and C when switch 4 is turned on and off in this circuit.
- FIG. 6B when the switch 4 is switched from the on state to the off state, the potential at the point A greatly changes as compared to the case shown in FIG.
- the potential at the point C shows a vibration waveform that attenuates as time passes, as shown in FIG. 6C.
- the potential at point D has a waveform that is the inverse of the potential at point C.
- FIG. 7 shows a circuit in which the capacitor C1 is removed from the circuit shown in FIG. 2 and the diode D2 is left.
- Figures 8A and 8B show the potential waveform at point A when switch 4 is turned on and off with this circuit. As shown in Fig. 8A, the potential waveform at point A when switch 4 switches from the off state to the on state is not exactly the same as that of the circuit shown in Fig. 5 (the waveform shown in Fig. 6A). , Little change.
- the potential waveform at the point A when the switch 4 switches from the ON state to the OFF state is larger than that of the circuit shown in FIG. 5 (FIG. 6B) as shown in FIG. 8B. It can be seen that it changes. This is because, in the circuit shown in FIG. 5, the potential waveform at point A when switch 4 switches from the on state to the off state, that is, the potential waveform at point A shown in FIG. (Inverted waveform).
- the back electromotive force generated in the driving coil 3a of the speaker 3 when the switch 4 switches from the on state to the off state is absorbed by the diode D2, and the point A is sufficiently connected to the capacitor C1.
- the pole is recharged so that point B has one polarity.
- This capacitor C 1 not only has an original function of smoothing a pulsating flow after the AC signal is rectified by the diode D 1, but also smoothes back electromotive force generated in an inductive load such as the driving coil 3 a having the speed force 3. It also has the function of performing
- the capacitor C1 has a function of returning a harmonic component generated by a back electromotive force generated in an inductive load such as the driving coil 3a of the speaker 3 to the battery side. I have.
- FIG. 9 shows a configuration example of a switching power supply to which the present invention is applied.
- a rectifier circuit 10 ′ a capacitor C 10 for smoothing the output voltage of the rectifier circuit 10, a diode D 11 for back electromotive force absorption connected in parallel to the capacitor C 10, It has a comparator 11, an oscillator 12, a transformer 13, diodes D12, D13, and a smoothing circuit composed of a coil L1 and a capacitor C12.
- the comparator 11 to which the output of the rectifier circuit 10 and the output of the oscillator 12 are input is periodically switched according to the comparison result between the output of the rectifier circuit 10 and the output of the oscillator 12.
- An alternating signal (for example, a 100 kHz pulse signal) that changes between a high level and a low level is output, is transformed by a transformer 13, is rectified by a diode D12, and is rectified by a coil L1.
- the smoothed DC voltage is output to the output terminals 62 and 63 by the smoothing circuit composed of the capacitor C12.
- the switching power supply of the above configuration includes a large number of inductances, which are inductive loads, the transformer 13 and the coil L each time switching is performed by the comparator, similarly to the drive coil of the speaker of the audio circuit described above.
- a counter electromotive force is generated at 1 or the like, but the counter electromotive force generated by connecting a diode in parallel with the smoothing capacitor C 10 with the polarity shown in FIG. 9 can be absorbed. .
- FIG. 10 shows the appearance of the back electromotive force prevention unit 100 according to the embodiment of the present invention, in which a reverse current flows between the positive lead wire 102 and the negative lead wire 103.
- a blocking diode 104 and a fuse 105 are connected in series, and a capacitor 106 is connected in parallel with the backflow blocking diode 104.
- the fuse 105 is detachable from the fuse socket 107 so that it can be replaced when the fuse 105 blows.
- Crimped terminals 108 and 109 are attached to the ends of the positive lead wire 102 and the negative lead wire 103, respectively. And the contact resistance is reduced.
- FIG. 11 is a circuit diagram showing a state where the back electromotive force prevention unit 100 according to the present invention is connected to the battery 110.
- 1 1 1 is a cell motor
- 1 1 2 is an electrical component
- 1 1 3 is a generator
- 1 1 4 is a starter switch
- 1 1 5 is a rectifier diode
- 1 1 6 is a charging generator 1 1 3 Shows an automatic on / off switch that is automatically turned on when the electromotive force of the battery exceeds the battery voltage.
- the back electromotive force prevention unit 100 is actually connected directly to the positive terminal and the negative terminal of the battery 110.
- the load of the battery 110 includes the cell motor 111 and the electrical equipment 112, but not only the cell motor 111 but also the car air conditioner, car audio, etc. in the electrical equipment 112. Also has an inductance component. These inductance components generate back electromotive force, which becomes noise and is superimposed on the output terminal voltage.
- the coil L of the charging generator 113 is turned off when it is off. Are open, making it difficult to absorb the generated back EMF.
- the back electromotive force generated from the inductance components of the cell motor 111, electrical components 112, and the charging generator 113 is reduced by the backflow. It flows through the blocking diode 104 and is absorbed, and does not appear at the output terminal of the battery 110.
- the reverse current blocking diode 104 is inserted into the battery 110.
- noise can be suppressed quickly, and unnecessary current can be prevented from flowing back to the electric appliance.
- the forward and reverse harmonic noise can be absorbed by the capacitor 106.
- the capacitor 106 or the backflow prevention diode 104 fails and short-circuits, the large current flowing from the battery 110 blows the fuse 105 to prevent accidents. .
- the present invention provides a back electromotive force prevention unit for a DC power supply which is applied to an audio circuit, a switching power supply, etc. and absorbs a back electromotive force generated in an inductive load.
- the back electromotive force prevention unit according to the present invention can effectively prevent the generation of noise due to the back electromotive force generated by the inductive load during the switching operation of the circuit element or the circuit section that performs the switching operation.
- the back electromotive force prevention unit for a battery according to the present invention can quickly suppress noise and prevent unnecessary current from flowing back to electrical components. Therefore, for example, by applying the present invention to a car-to-battery, electrical components can be operated correctly, and the entire car operates smoothly.
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- Dc-Dc Converters (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Emergency Protection Circuit Devices (AREA)
- Secondary Cells (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/558,355 US7821760B2 (en) | 2003-05-28 | 2004-05-27 | Counter electromotive force prevention unit |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003150411 | 2003-05-28 | ||
JP2003/150411 | 2003-05-28 | ||
JP2004093260A JP4256810B2 (ja) | 2003-05-28 | 2004-03-26 | 逆起電力防止ユニット |
JP2004/93260 | 2004-03-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004109887A1 true WO2004109887A1 (ja) | 2004-12-16 |
Family
ID=33513351
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/007645 WO2004109887A1 (ja) | 2003-05-28 | 2004-05-27 | 逆起電力防止ユニット |
Country Status (3)
Country | Link |
---|---|
US (1) | US7821760B2 (ja) |
JP (1) | JP4256810B2 (ja) |
WO (1) | WO2004109887A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114180094A (zh) * | 2021-12-08 | 2022-03-15 | 中国兵器装备集团自动化研究所有限公司 | 一种系留多旋翼无人机电源管理装置及方法 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1749701A1 (de) * | 2005-08-03 | 2007-02-07 | Ford Global Technologies, LLC | Schaltungsanordnung für Rekuperationsenergie von Kraftfahrzeugen |
JP2007331405A (ja) * | 2006-06-12 | 2007-12-27 | Shigeki Shiratori | 自動車の電気回路安定化装置及び該装置を備えた自動車 |
JP2008168815A (ja) * | 2007-01-12 | 2008-07-24 | Kyokuto Kaihatsu Kogyo Co Ltd | 荷受台昇降装置の駆動制御装置 |
JP2011132887A (ja) * | 2009-12-24 | 2011-07-07 | 5Zigen International Inc | 車両の電力供給安定装置 |
JP4783478B1 (ja) * | 2011-01-28 | 2011-09-28 | オーディオ・ラボ有限会社 | 誘導信号除去回路 |
DE102017210303B3 (de) * | 2017-06-20 | 2018-11-22 | Audi Ag | Verfahren und Batteriemanagementsystem zum Betreiben einer Traktionsbatterie in einem Kraftfahrzeug sowie Kraftfahrzeug mit einem derartigen Batteriemanagementsystem |
Citations (3)
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JPH079849A (ja) * | 1993-06-23 | 1995-01-13 | Neox Lab:Kk | 車両用サンバイザ |
JPH0847244A (ja) * | 1994-07-28 | 1996-02-16 | Motor Jidosha Kk | 電力変換装置のノイズ防止装置及びノイズ防止フィルター |
JP2001326300A (ja) * | 2000-05-18 | 2001-11-22 | Nissan Motor Co Ltd | 半導体装置 |
Family Cites Families (11)
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US3564333A (en) * | 1968-02-21 | 1971-02-16 | Nat Standard Co | Electric welder that uses magnetic amplifier to supply firing signals for controlled rectifier |
US4415959A (en) * | 1981-03-20 | 1983-11-15 | Vicor Corporation | Forward converter switching at zero current |
JP2757191B2 (ja) | 1988-09-28 | 1998-05-25 | スズキ株式会社 | 船外機用音声アラーム出力切換装置 |
US4971583A (en) | 1988-05-31 | 1990-11-20 | Suzuki Jidosha Kogyo Kabushiki Kaisha | Apparatus for outboard engine for switching to voice alarm output |
IT1268472B1 (it) * | 1993-10-22 | 1997-03-04 | St Microelectronics Srl | Convertitore buck a modalita' di funzionamento automaticamente determinata dal livello di carico |
JP3219932B2 (ja) | 1994-04-08 | 2001-10-15 | カルソニックカンセイ株式会社 | 自動車用ノイズフィルタ |
JP3385893B2 (ja) * | 1997-02-21 | 2003-03-10 | トヨタ自動車株式会社 | 内燃機関用空燃比センサのヒータ制御装置 |
JPH1183023A (ja) | 1997-08-29 | 1999-03-26 | Mitsubishi Electric Corp | 高周波加熱調理器 |
DE69922495T2 (de) * | 1999-06-16 | 2005-11-03 | Stmicroelectronics S.R.L., Agrate Brianza | Schaltung zur Verbindung zwischen einem Autoradio und einer Kraftfahrzeugbatterie |
DE60011038T2 (de) * | 2000-04-01 | 2005-07-21 | Robert Bosch Gmbh | Zeit und Fall-kontrolliertes Aktivierungssystem für die Aufladung und die Entladung von piezoelektrischen Elementen |
JP2002094348A (ja) * | 2000-09-13 | 2002-03-29 | Soshin Electric Co Ltd | Dcラインフィルタ |
-
2004
- 2004-03-26 JP JP2004093260A patent/JP4256810B2/ja not_active Expired - Lifetime
- 2004-05-27 WO PCT/JP2004/007645 patent/WO2004109887A1/ja active Application Filing
- 2004-05-27 US US10/558,355 patent/US7821760B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH079849A (ja) * | 1993-06-23 | 1995-01-13 | Neox Lab:Kk | 車両用サンバイザ |
JPH0847244A (ja) * | 1994-07-28 | 1996-02-16 | Motor Jidosha Kk | 電力変換装置のノイズ防止装置及びノイズ防止フィルター |
JP2001326300A (ja) * | 2000-05-18 | 2001-11-22 | Nissan Motor Co Ltd | 半導体装置 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114180094A (zh) * | 2021-12-08 | 2022-03-15 | 中国兵器装备集团自动化研究所有限公司 | 一种系留多旋翼无人机电源管理装置及方法 |
CN114180094B (zh) * | 2021-12-08 | 2024-02-09 | 中国兵器装备集团自动化研究所有限公司 | 一种系留多旋翼无人机电源管理装置及方法 |
Also Published As
Publication number | Publication date |
---|---|
JP2005012994A (ja) | 2005-01-13 |
US7821760B2 (en) | 2010-10-26 |
US20070159134A1 (en) | 2007-07-12 |
JP4256810B2 (ja) | 2009-04-22 |
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