WO1996038893A1 - Freilaufkreis mit einstellbarer aus-verzugszeit - Google Patents
Freilaufkreis mit einstellbarer aus-verzugszeit Download PDFInfo
- Publication number
- WO1996038893A1 WO1996038893A1 PCT/DE1996/000899 DE9600899W WO9638893A1 WO 1996038893 A1 WO1996038893 A1 WO 1996038893A1 DE 9600899 W DE9600899 W DE 9600899W WO 9638893 A1 WO9638893 A1 WO 9638893A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- switching transistor
- parallel
- circuit
- coil
- diode
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
- H01F7/1805—Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current
- H01F7/1811—Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current demagnetising upon switching off, removing residual magnetism
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
- H01F7/1883—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings by steepening leading and trailing edges of magnetisation pulse, e.g. printer drivers
Definitions
- the invention relates to a freewheeling circuit with a predefinable OFF delay time for a coil, with the following features:
- the free-wheeling circuit comprises a series circuit lying parallel to the coil and consisting of a first diode and a voltage-dependent resistor, b) the voltage-dependent resistor is connected in parallel with a first switching transistor, c) there is a parallel connection consisting of a capacitor and a for driving the first switching transistor first ohmic resistance at its control input, d) the parallel connection is simultaneously connected to a control supply voltage source.
- a generic freewheeling circuit is known from DE 33 17 942 C2.
- a circuit arrangement for protecting mechanical switching devices by an electronic switch is disclosed here.
- the mechanical switching devices are in series with ohmic inductive loads fed by direct current.
- the electronic switch can be controlled by a capacitive memory loaded from the load voltage.
- the electronic switch is parallel to the load and becomes conductive when the switching device is switched off.
- the electronic switch has a voltage-dependent resistor in parallel and the parallel connection is in turn parallel to the load.
- the circuit arrangement acts similarly to a freewheeling diode connected in parallel to the load. As long as a control ⁇ supply voltage source connected to the load, the capacitive accumulator is charged and the electronic switch turned on.
- Such ohmic inductive loads are e.g. Contactor coils that are supplied with direct current by a control supply voltage source. Depending on the size of the contactor and the contactor coil used, the contactor may fall off, e.g. 100 to 300 msec, which is still relatively slow in view of the requirements. The goal is often to achieve shorter or defined waste times for the shooters.
- a circuit arrangement for controlling a contactor is disclosed in G 94 09 760.7.
- Parallel to the contactor coil is a freewheeling branch, which contains a switching transistor and a freewheeling diode in series with it.
- a freewheel control controls the switching transistor, depending on the voltage form of the control voltage.
- a device for controlling an electromagnetic consumer includes a series connection of the electromagnetic consumer and a first switching means, a freewheeling circuit for the electromagnetic consumer, which comprises a second switching means, and control means for actuating the switching means.
- the invention has for its object to provide a free-wheeling circuit of the type mentioned above, with which the magnetic energy of a coil, generally a parallel connected ohmic inductive load, can be reduced from a control supply voltage within a short or defined period after it has been switched off .
- a freewheeling circuit in the case of shooters, the shooters should have a short or defined fall duration According to the invention this is achieved with the features according to claim 1.
- the advantage of this freewheeling circuit is its self-controlled effect. It stems from the fact that when switch-off overvoltages occur on the coil, the freewheeling transistor, ie the first switching transistor, is reliably blocked and the current flow is thus commutated to the voltage-dependent resistor.
- the drawing shows a freewheeling circuit connected in parallel with a coil 1.
- This parallel connection is connected to a control supply voltage source 8 with a positive pole 13 and a negative pole 14.
- the freewheeling circuit comprises a series circuit directly parallel to the coil 1, comprising a first diode 2 and a first switching transistor 4, to which a voltage-dependent resistor 3 is connected in parallel.
- the drain terminal D of the switching transistor 4 is connected to the negative pole 14, its source terminal S is connected to the anode of the first diode 2, which in turn is connected to the positive pole 13 with its cathode terminal.
- the positive pole 13 is connected to the gate terminal G of the first switching transistor 4 via a third diode 15 and a third ohmic resistor 16 connected in series therewith.
- a parallel circuit 5 consisting of a first ohmic resistor 7 and a capacitor 6 lies between the source terminal S and the gate terminal G of the first switching transistor 4.
- the parallel circuit 5 has a first Zener diode 17 and a second switching transistor 9 connected in parallel which with its emitter at the source terminal S and with its collector at the gate terminal G of the first switching transistor 4th is present.
- the base of the second switching transistor 9 is connected to the negative pole 14 via a series circuit comprising a second ohmic resistor 10, a second Zener diode 11 and a second diode 12, the anode connection of the second diode 12 and the two cathode connections being connected to this the second diode 12 and the second zener diode 11 are connected to one another.
- the coil 1 is e.g. a contactor coil, which an electronic control 18, as shown, can be connected in series.
- the control supply voltage source 8 is a direct voltage source with which the coil 1, generally an ohmic inductive load, is supplied. At the same time, a control voltage is applied to the series connection of the first zener diode 17, the first ohmic resistor 7 and the capacitor 6 via the diode 15 and the ohmic resistor 16. This switches the first switching transistor 4 into the conductive state, which is maintained as long as the control supply voltage source 8 is switched on. When the control supply voltage source 8 is switched off, the control voltage from the first switching transistor 4 decreases only slowly after the time constant specified by the parallel circuit 5 until it reaches a value at which the first
- Switching transistor 4 blocks. To avoid the unstable switching state of the first switching transistor 4 in its linear region, the second switching transistor 9 ensures safe blocking of the first switching transistor 4 operating as a free-wheeling transistor.
- the diode connection of the second switching transistor 9, consisting of the second ohmic resistor 10, the second Zener diode 11 and the second diode 12, is used in the event of overvoltages on the first switching transistor 4 which occur when the first switching transistor 4 is in the linear range works, the second switching transistor 9th to steer safely and thus short-circuit the gate-source path of the first switching transistor 4 and thus to block it.
- the voltage-dependent resistor 3 serves to protect the drain-source path of the first switching transistor 4. It reduces the switch-off overvoltages on the coil 1 which occur when the control supply voltage source 8 is switched off and protects the first switching transistor 4 against destruction.
- the switch-off delay time of the contactor can be set as desired. This only applies up to the maximum switch-off delay period in which the contactor would drop out without circuitry.
- the circuitry can be adapted to various electromagnetic drives.
- the freewheeling circuit can also be used for an electronically clocked coil control 18.
- the freewheeling circuit described here is much simpler and has fewer components.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electronic Switches (AREA)
- Relay Circuits (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP96919570A EP0829123B1 (de) | 1995-05-30 | 1996-05-23 | Freilaufkreis mit einstellbarer aus-verzugszeit |
US08/945,920 US5933312A (en) | 1995-05-30 | 1996-05-23 | Free-wheel circuit with an adjustable off delay time |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19519757A DE19519757C2 (de) | 1995-05-30 | 1995-05-30 | Freilaufkreis mit vorgebbarer AUS-Vorzugszeit für eine Spule |
DE19519757.7 | 1995-05-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996038893A1 true WO1996038893A1 (de) | 1996-12-05 |
Family
ID=7763194
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1996/000899 WO1996038893A1 (de) | 1995-05-30 | 1996-05-23 | Freilaufkreis mit einstellbarer aus-verzugszeit |
Country Status (5)
Country | Link |
---|---|
US (1) | US5933312A (de) |
EP (1) | EP0829123B1 (de) |
CN (1) | CN1080014C (de) |
DE (1) | DE19519757C2 (de) |
WO (1) | WO1996038893A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109066632A (zh) * | 2018-10-18 | 2018-12-21 | 广东电网有限责任公司 | 一种快速灭磁装置及方法 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19725317B4 (de) * | 1997-06-09 | 2005-06-23 | Vickers Systems Zweigniederlassung Der Trinova Gmbh | Schaltungsanordnung zur Ansteuerung eines mit Gleichspannung betätigbaren Magnetventiles |
JP3926720B2 (ja) * | 2002-10-09 | 2007-06-06 | 株式会社ケーヒン | 励磁制御回路 |
DE102009043415B3 (de) * | 2009-09-29 | 2010-10-14 | Siemens Aktiengesellschaft | Freilaufkreis |
US8982527B2 (en) | 2010-09-28 | 2015-03-17 | Nxp B.V. | System and method for driving a relay circuit |
CN103887783B (zh) * | 2012-12-20 | 2017-06-13 | 海洋王(东莞)照明科技有限公司 | 一种过压保护电路 |
JP5744144B2 (ja) * | 2013-09-26 | 2015-07-01 | 三菱電機株式会社 | 誘導性負荷の給電制御装置 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3317942A1 (de) * | 1983-05-17 | 1984-11-22 | Siemens AG, 1000 Berlin und 8000 München | Schaltungsanordnung |
DE4229440A1 (de) * | 1992-09-03 | 1994-03-10 | Bosch Gmbh Robert | Schaltungsanordnung zum Ein- und Ausschalten einer elektrischen Last |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8402470D0 (en) * | 1984-01-31 | 1984-03-07 | Lucas Ind Plc | Drive circuits |
DE4321252C2 (de) * | 1993-06-25 | 1996-09-12 | Siemens Ag | Schaltungsanordnung zur Ansteuerung eines Schützes |
DE4321127A1 (de) * | 1993-06-25 | 1995-01-05 | Bosch Gmbh Robert | Vorrichtung zur Ansteuerung eines elektromagnetischen Verbrauchers |
JP3018857B2 (ja) * | 1993-09-07 | 2000-03-13 | 富士電機株式会社 | 電磁石装置の駆動回路 |
-
1995
- 1995-05-30 DE DE19519757A patent/DE19519757C2/de not_active Expired - Lifetime
-
1996
- 1996-05-23 US US08/945,920 patent/US5933312A/en not_active Expired - Lifetime
- 1996-05-23 CN CN96194128A patent/CN1080014C/zh not_active Expired - Lifetime
- 1996-05-23 WO PCT/DE1996/000899 patent/WO1996038893A1/de active IP Right Grant
- 1996-05-23 EP EP96919570A patent/EP0829123B1/de not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3317942A1 (de) * | 1983-05-17 | 1984-11-22 | Siemens AG, 1000 Berlin und 8000 München | Schaltungsanordnung |
DE4229440A1 (de) * | 1992-09-03 | 1994-03-10 | Bosch Gmbh Robert | Schaltungsanordnung zum Ein- und Ausschalten einer elektrischen Last |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109066632A (zh) * | 2018-10-18 | 2018-12-21 | 广东电网有限责任公司 | 一种快速灭磁装置及方法 |
CN109066632B (zh) * | 2018-10-18 | 2024-01-23 | 广东电网有限责任公司 | 一种快速灭磁方法 |
Also Published As
Publication number | Publication date |
---|---|
DE19519757C2 (de) | 1997-04-24 |
EP0829123B1 (de) | 1999-02-03 |
DE19519757A1 (de) | 1996-12-12 |
US5933312A (en) | 1999-08-03 |
EP0829123A1 (de) | 1998-03-18 |
CN1080014C (zh) | 2002-02-27 |
CN1185240A (zh) | 1998-06-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE102009043415B3 (de) | Freilaufkreis | |
EP1527470B1 (de) | Steueranordnung für einen elektromagnetischen antrieb | |
EP0756782B2 (de) | Gleichstrom-steuerschaltung | |
EP0287166B1 (de) | Schaltungsanordnung zur Begrenzung der Einschaltstromspitzen bei einem Schalttransistor | |
EP0829123B1 (de) | Freilaufkreis mit einstellbarer aus-verzugszeit | |
DE69822397T2 (de) | Vorrichtung zur Steuerung eines Schutzschalters | |
DE2423258A1 (de) | Schaltungsanordnung zur stromversorgung eines induktiven verbrauchers | |
DE102019116344B3 (de) | Schutzvorrichtung | |
EP0965140B1 (de) | Stromgeregelte endstufe für elektromagnetische stellantriebe | |
DE19747033A1 (de) | Elektronische Schalteinrichtung für Magneten | |
EP1366502B1 (de) | Elektrische schaltung zur vermeidung eines lichtbogens über einem elektrischen kontakt | |
DE10341582B4 (de) | Schaltungsanordnung zum schnellen Schalten induktiver Lasten | |
EP2994929A1 (de) | Relais | |
DE2447199A1 (de) | Schaltungsanordnung zur steuerung eines relais | |
DE69921076T2 (de) | Elektronische Steuerschaltung für eine bistabile Betätigungsvorrichtung | |
EP0489935B1 (de) | MOSFET-Schalter für eine induktive Last | |
EP1203389B1 (de) | Beschaltung für ein elektromagnetisches schaltgerät | |
DE2260011C3 (de) | ||
EP0353533B1 (de) | Schaltungsanordnung bei Endstufen für die Steuerung von Stellmagneten | |
EP0941550B1 (de) | Elektromagnet für magnetventil | |
DE19725317B4 (de) | Schaltungsanordnung zur Ansteuerung eines mit Gleichspannung betätigbaren Magnetventiles | |
EP0210495B1 (de) | Freilaufschaltung | |
DE2827282A1 (de) | Steuervorrichtung | |
DE2854587A1 (de) | Steuerschaltung fuer einen kontaktgeber | |
CH425948A (de) | Schaltungsanordnung zur Ein- und Ausschaltung von Elektromagneten, insbesondere für Werkzeugmaschineneinrichtungen mit grosser Genauigkeit |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 96194128.6 Country of ref document: CN |
|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): CN JP US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1996919570 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 08945920 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 1996919570 Country of ref document: EP |
|
WWG | Wipo information: grant in national office |
Ref document number: 1996919570 Country of ref document: EP |