EP0829123B1 - Freilaufkreis mit einstellbarer aus-verzugszeit - Google Patents
Freilaufkreis mit einstellbarer aus-verzugszeit Download PDFInfo
- Publication number
- EP0829123B1 EP0829123B1 EP96919570A EP96919570A EP0829123B1 EP 0829123 B1 EP0829123 B1 EP 0829123B1 EP 96919570 A EP96919570 A EP 96919570A EP 96919570 A EP96919570 A EP 96919570A EP 0829123 B1 EP0829123 B1 EP 0829123B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- switching transistor
- parallel
- coil
- diode
- free
- 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 - Lifetime
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Images
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
- a generic freewheeling circuit is from DE 33 17 942 C2 known.
- the mechanical switching devices are worn out DC-fed ohmic inductive loads in series.
- the electronic switch is through one of the load voltage charged capacitive memory controllable.
- the electronic switch is a voltage-dependent resistor in parallel and the parallel connection is in turn parallel to the load.
- the circuit arrangement acts like a load freewheeling diode connected in parallel. As long as a control supply voltage source is connected to the load, the capacitive memory charged and the electronic switch controlled.
- the capacitive storage discharges what a transition of the electronic switch to the locked state causes.
- the due to the stored magnetic Energy continues to flow through the ohmic inductive load Electricity is switched from the electronic switch to the voltage-dependent resistance commutates, and thus the residual energy stored in the inductor finally quickly dismantled.
- Such ohmic inductive loads are e.g. Contactor coils, by a control supply voltage source with direct current be supplied.
- a control supply voltage source with direct current be supplied.
- the protection and the included Contactor coil used result in the fall of the Protection of waste periods of e.g. 100 to 300 msec, what in view to the requirements is still relatively slow. It there is often the goal of shorter or defined waste periods for the shooter to reach.
- G 94 09 760.7 there is a circuit arrangement for control protection. Parallel to the contactor coil is a freewheeling branch, the one switching transistor and one contains freewheeling diode in series. A freewheel control controls the switching transistor depending on the Voltage form of the control voltage.
- a device for controlling an electromagnetic Known consumer includes a series connection of the electromagnetic Consumer and a first switching means, a freewheeling circuit for the electromagnetic consumer who wants a second Includes switching means and control means for actuation the switching means.
- the invention has for its object a freewheeling circuit to create the above type, with which the magnetic Energy of a coil, generally a parallel one ohmic inductive load, after switching it off from a control supply voltage within a short or defined Can reduce duration.
- a freewheeling circuit to create the above type, with which the magnetic Energy of a coil, generally a parallel one ohmic inductive load, after switching it off from a control supply voltage within a short or defined Can reduce duration.
- the use of such a freewheeling circuit in the case of shooters, a short or defined fall duration of the Enable shooters. According to the invention, this is done with the features solved according to claim 1.
- the advantage of this freewheeling circuit is its self-directed effect. she stems from the fact that when switch-off overvoltages occur the coil of the freewheeling transistor, i.e. the first switching transistor is safely blocked and thus the flow of electricity to the voltage-dependent resistance is commutated.
- the drawing shows a parallel to a coil 1 Free wheel.
- This parallel connection is due to one Control supply voltage source 8 with a positive pole 13 and one Negative pole 14.
- the freewheeling circuit includes one directly to Coil 1 in parallel series connection from a first Diode 2 and a first switching transistor 4, which is a voltage-dependent Resistor 3 is connected in parallel.
- the drain terminal D of the switching transistor 4 at the negative pole 14 its source terminal S is with the anode of the first Diode 2 connected, which in turn with its cathode connection the positive pole 13 is switched on.
- the positive pole 13 is over a third diode 15 and a third in series ohmic resistor 16 to the gate terminal G of the first Switching transistor 4 connected.
- One from a first ohmic resistor 7 and a capacitor 6 existing parallel circuit 5 lies between the Source terminal S and the gate terminal G of the first switching transistor 4.
- the parallel connection 5 is a first Zener diode 17 and a second switching transistor 9 in parallel, the one with its emitter at the source connection S and with its Collector at gate terminal G of first switching transistor 4 is present.
- the base of the second switching transistor 9 is over a series connection of a second ohmic resistor 10, a second Zener diode 11 and a second diode 12 the negative pole 14 switched, on which the anode connection of the second diode 12 and the two cathode connections the second diode 12 and the second zener diode 11 are interconnected.
- the coil 1 is e.g. a contactor coil that has an electronic Control 18, as shown, can be connected in series can.
- the control supply voltage source 8 is a DC voltage source, with which the coil 1, generally an ohmic inductive Load, is supplied.
- the diode 15 and the ohmic resistor 16 the parallel connection in series from the first Zener diode 17, the first ohmic resistor 7 and the capacitor 6 with a control voltage.
- the first switching transistor 4 in the conductive state that is maintained as long as how the control supply voltage source 8 is connected.
- the control supply voltage source 8 builds up Drive voltage from the first switching transistor 4 after the parallel connection 5 predetermined time constant only slowly until it reaches a value at which the first Switching transistor 4 blocks.
- the second switching transistor 9 makes the area a safe one Disable the first operating as a free-wheeling transistor Switching transistor 4 guaranteed.
- the diode circuit of the second switching transistor 9, consisting from the second ohmic resistor 10, the second Zener diode 11 and the second diode 12 are used for Occurrence of overvoltages on the first switching transistor 4, which arise when the first switching transistor 4 in linear range operates, the second switching transistor 9 to steer safely and thus the gate-source route of the short circuit the first switching transistor 4 and this to lock.
- the voltage-dependent resistor 3 serves to protect the Drain-source path of the first switching transistor 4. It builds that arise when the control supply voltage source 8 is switched off Shutdown overvoltages on coil 1 and protects the first switching transistor 4 before destruction.
- the protection's switch-off delay time can be set arbitrarily. This only applies to the maximum Switch-off delay period in which protection without wiring would fall off.
- the first switching transistor 4th and the voltage-dependent resistor 3 is the circuit adaptable to various electromagnetic drives.
- the freewheeling circuit can also be used for an electronically clocked Coil control 18 can be used.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electronic Switches (AREA)
- Relay Circuits (AREA)
Abstract
Description
Claims (2)
- Freilaufkreis mit vorgebbarer AUS-Verzugsdauer für eine Spule (1), mit folgenden Merkmalen:a) der Freilaufkreis umfaßt eine parallel zur Spule (1) liegende Reihenschaltung aus einer ersten Diode (2) und einem spannungsabhängigen Widerstand (3),b) dem spannungsabhängigen Widerstand (3) ist ein erster Schalttransistor (4) parallelgeschaltet,c) zur Ansteuerung des ersten Schalttransistors (4) liegt eine Parallelschaltung (5) aus einem Kondensator (6) und einem ersten ohmschen Widerstand (7) an dessen Steuereingang (6),d) die Parallelschaltung (5) liegt gleichzeitig an einer Steuerspeisespannungsquelle (8),e) der Parallelschaltung (5) ein zweiter Schalttransistor (9) parallelgeschaltet ist, und daßf) bei Auftreten einer Abschaltüberspannung an der Spule (1) der zweite Schalttransistor (9) durchgesteuert und dadurch der erste Schalttransistor (4) gesperrt wird.
- Freilaufkreis nach Anspruch 1, dadurch gekennzeichnet, daß der Ansteuerkreis des zweiten Schalttransistors (9) eine Reihenschaltung aus einem zweiten ohmschen Widerstand (10), einer Zenerdiode (11) und einer zweiten Diode (12) enthält, wobei die Zenerdiode (11) und die zweite Diode (12) entgegengesetzt gepolt geschaltet sind.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19519757 | 1995-05-30 | ||
DE19519757A DE19519757C2 (de) | 1995-05-30 | 1995-05-30 | Freilaufkreis mit vorgebbarer AUS-Vorzugszeit für eine Spule |
PCT/DE1996/000899 WO1996038893A1 (de) | 1995-05-30 | 1996-05-23 | Freilaufkreis mit einstellbarer aus-verzugszeit |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0829123A1 EP0829123A1 (de) | 1998-03-18 |
EP0829123B1 true EP0829123B1 (de) | 1999-02-03 |
Family
ID=7763194
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96919570A Expired - Lifetime EP0829123B1 (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) |
Families Citing this family (7)
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 |
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 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3317942A1 (de) * | 1983-05-17 | 1984-11-22 | Siemens AG, 1000 Berlin und 8000 München | Schaltungsanordnung |
GB8402470D0 (en) * | 1984-01-31 | 1984-03-07 | Lucas Ind Plc | Drive circuits |
DE4229440B4 (de) * | 1992-09-03 | 2004-04-15 | Robert Bosch Gmbh | Schaltungsanordnung zum Ein- und Ausschalten einer elektrischen Last |
DE4321127A1 (de) * | 1993-06-25 | 1995-01-05 | Bosch Gmbh Robert | Vorrichtung zur Ansteuerung eines elektromagnetischen Verbrauchers |
DE4321252C2 (de) * | 1993-06-25 | 1996-09-12 | Siemens Ag | Schaltungsanordnung zur Ansteuerung eines Schützes |
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
Also Published As
Publication number | Publication date |
---|---|
CN1185240A (zh) | 1998-06-17 |
CN1080014C (zh) | 2002-02-27 |
US5933312A (en) | 1999-08-03 |
EP0829123A1 (de) | 1998-03-18 |
WO1996038893A1 (de) | 1996-12-05 |
DE19519757A1 (de) | 1996-12-12 |
DE19519757C2 (de) | 1997-04-24 |
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