EP0768683B1 - Stromversorgungsschaltung für eine Erregerspule eines Elktromagneten - Google Patents

Stromversorgungsschaltung für eine Erregerspule eines Elktromagneten Download PDF

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Publication number
EP0768683B1
EP0768683B1 EP96402114A EP96402114A EP0768683B1 EP 0768683 B1 EP0768683 B1 EP 0768683B1 EP 96402114 A EP96402114 A EP 96402114A EP 96402114 A EP96402114 A EP 96402114A EP 0768683 B1 EP0768683 B1 EP 0768683B1
Authority
EP
European Patent Office
Prior art keywords
semiconductor element
winding
voltage
supply circuit
circuit
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
Application number
EP96402114A
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English (en)
French (fr)
Other versions
EP0768683A1 (de
Inventor
Karim Benkaroun
Alain Gousset
Manuel Lima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schneider Electric SE
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Schneider Electric SE
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Publication date
Application filed by Schneider Electric SE filed Critical Schneider Electric SE
Publication of EP0768683A1 publication Critical patent/EP0768683A1/de
Application granted granted Critical
Publication of EP0768683B1 publication Critical patent/EP0768683B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • H01F7/1833—Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current by changing number of parallel-connected turns or windings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/14—Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias
    • H01F2029/143—Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias with control winding for generating magnetic bias

Definitions

  • the present invention relates to a current supply circuit direct or alternating current rectified from an excitation coil of an electromagnet comprising at least one main winding and a secondary winding.
  • the coil thus comprises a call winding and a holding winding.
  • the windings When the windings are arranged in parallel, they are both supplied with a strong inrush current to cause the initial displacement of the circuit moving magnetic of the electromagnet, then only the holding winding remains supplied with a lower current to maintain the mobile magnetic circuit in attracted position, the supply of the call winding being stopped by switching.
  • the invention therefore aims to achieve an electronic circuit which ensures switching of the supply of one of the two windings of the coil only when, after closing the electromagnet, the current of the coil is very close to reaching sufficient holding current to maintain the mobile magnetic circuit in attracted position.
  • the supply circuit comprising switching means of a first semiconductor element with controlled conductivity capable of ensuring or blocking the supply secondary winding, said means being arranged between the main winding and the control of the semiconductor element and comprising a second semiconductor element, is characterized in that the second semiconductor element blocks the first semiconductor element when the voltage between the control and output of the second semiconductor element reaches a threshold value greater than a value corresponding to the start of closing of the electromagnet, and that the switching means comprise a voltage adaptation circuit which is connected to the main winding and to the control of the second element semiconductor and which measures a voltage representative of the current flowing in the winding main and integrate this voltage to adapt the time required to reach the threshold voltage.
  • the switching means comprise a voltage adaptation circuit which is connected to the main winding and to the control of the second semiconductor element, the latter being connected to the control of the first semiconductor element to block it when the voltage between the command and the output of the second semiconductor element reaches the threshold value.
  • the adaptation circuit advantageously comprises an RC filter constituted a resistive element and a capacitor connected in parallel, the control of the second semiconductor element being connected to an input of this circuit.
  • the resistive element preferably consists of a divider bridge provided with two resistors connected in series, one of the resistors being connected to the main winding and the other resistor being put in parallel with the capacitor and connected to the line return feed from the coil.
  • the arrangement and constitution of the switching means thus make it possible confidently switch the first semiconductor element when the current is close to reaching the holding value after closing complete of the electromagnet.
  • FIG. 1 The diagram visible in Figure 1 represents the supply circuit of a excitation coil of an electromagnet according to the invention.
  • the electromagnet not shown here, includes the excitation coil, a fixed magnetic circuit and a movable magnetic circuit intended to be attracted by the fixed magnetic circuit when the coil is supplied with current.
  • the reel of the electromagnet is provided with two windings, a main winding B1 and a secondary winding B2.
  • the windings B1 and 82 are placed in parallel between two lines supply, a go line a and a return line b, connected to the respective poles, positive and negative of a current supply source S.
  • This circuit can work from a direct current source ( Figures 1 to 3) or alternating current straightened ( Figure 4).
  • the main winding B1 and the secondary winding B2 are suitable for trigger the movement of the mobile magnetic circuit.
  • Alone is continuously powered the main winding B1 to keep the attracted position mobile magnetic circuit once the electromagnet is closed.
  • the winding B1 is connected in series with a resistor R1 between the supply lines a and b.
  • the supply of winding B2 is controlled by a semiconductor element T2 with controlled conductivity of the transistor type for example.
  • Bipolar or other type T2 transistor is connected to a voltage circuit threshold 20 which delivers the threshold voltage necessary for its conductivity upon switching on under circuit voltage.
  • the circuit 20 can consist of two resistors R3 and R4 connected in series between lines a and b, the control of transistor T2 being connected to the connection point C of the two resistors.
  • the circuit 20 can consist of a resistor R2 and a Zéner Z2 diode connected in series between lines a and b, the control of transistor T2 being connected to connection point C of the resistor and the diode.
  • the transistor T2 is intended to be blocked after closing the circuits magnetic of the electromagnet to cut the power supply of the winding secondary 82.
  • the transistor is blocked by switching means 10 arranged between its control and the main winding B1.
  • the switching means 10 comprise a circuit for adapting voltage 11 and a semiconductor element T1 with controlled conductivity of the type transistor.
  • the voltage matching circuit 11 includes a resistor R5 connected to main winding B1 and connected in series with a RC type filter which includes a resistor R6 and a capacitor C1 connected in parallel and connected to the line of back b. This circuit constitutes a voltage integrator.
  • the transistor T1 of bipolar or other type has an input connected to the command of transistor T2, an output connected to return line b, and a command connected to the connection point D between resistance R5 and resistance R6 of circuit 11.
  • the diagram in FIG. 4 represents the circuit supplied from a full alternating rectified alternating current source.
  • a rectifier bridge is arranged between the AC power source S and power lines a and b of circuit so as to supply it with double rectified alternating current alternation, each alternation being made up of rectified sinusoids.
  • a smoothing device 30 which makes it possible to attenuate the form of straightened sinusoids.
  • the device 30 comprises a diode D2 and a capacitor C2 placed in series between the main winding B1 and the return line b, the resistor R5 of the circuit 11 being connected to a midpoint E connecting the diode D2 and the capacitor C2.
  • Figures 5a and 5b show the shape of the current flowing in the main winding B1 and respectively in the secondary winding B2.
  • the shape of the current flowing in the secondary winding B2 is the same as for the main winding B1, except that the current does not take values negative. To study the image of the current in the coil, it is therefore sufficient to study the shape of the current in the main winding.
  • the current pattern is the same, the curve on the other hand is composed of sinusoids.
  • the constitution of the adaptation circuit 11 can therefore remain unchanged from that of the DC circuit.
  • the call phase A and the maintenance phase B there are two phases, the call phase A and the maintenance phase B; the transition between the two phases corresponds to moment when the current stabilizes at a holding value after the closing of the electromagnet.
  • the intensity increases through the two windings up to a value l1 of the current from which the mobile magnetic circuit moves to the fixed magnetic circuit, resulting in a simultaneous reduction of the current until closing of the electromagnet corresponding to time t1 on the figure; these stages are characteristic of the first wave O1 of the current.
  • the current increases again according to a curve of type exponential which corresponds to the second O2 wave of the current to reach the hold value lc corresponding to the start of hold phase B. You can then cut the supply to the secondary winding B2 by means of switching 10, the adaptation circuit 11 permitting switching while ensuring closing the electromagnet.
  • Figure 6 illustrates the voltage across the resistor R1 whose shape is the same as that of the current in the winding B1 illustrated in FIG. 5a since this voltage is representative of the image of the current in the winding B1. It is this voltage which is processed by the adaptation circuit 11. It is therefore necessary to have an image of the current flowing in the coil; this image is therefore obtained by measuring means constituted by the resistor R1 or even a diode Zen.
  • Figure 7 illustrates the shape of the voltage across the RC circuit of the circuit 11, that is to say between the control and the output of transistor T1.
  • the capacitor C1 charges without reaching its maximum capacity so that the voltage remains below a threshold voltage Vs which corresponds to the voltage necessary to trigger the conductivity of transistor T1. So that the value V1 of the voltage across the RC circuit, therefore of the voltage between the control and the output of transistor T1, remains below the threshold value Vs as long as the electromagnet is not closed, it is ensured that the value Vm of the first wave O1 'of aux voltage terminals of R1 is less than the holding voltage Vc of the second wave of voltage O2 'corresponding to the holding current lc sufficient to maintain the electromagnet closed, which is achieved by the voltage adaptation circuit 11.
  • Both resistors R5 and R6 and the capacitor C1 constitute an integrator which processes the voltage signal delivered across the resistor R1 in order to adapt from this signals the time required to reach the trigger threshold voltage Vs of the transistor T1.
  • the capacitor C1 discharges during the voltage drop at terminals of R1 which corresponds to the movement of the mobile magnetic circuit.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Relay Circuits (AREA)
  • Dc-Dc Converters (AREA)
  • Valve Device For Special Equipments (AREA)
  • Electromagnets (AREA)
  • Power Conversion In General (AREA)

Claims (8)

  1. Versorgungskreis mit Gleichstrom oder gleichgerichtetem Wechselstrom eines mit mindestens einer Hauptwicklung (B1) und einer Sekundärwicklung (B2) ausgerüsteten Elektromagneten, mit Umschaltmitteln (10) eines ersten Halbleiterelements (T2) mit gesteuerter Leitfähigkeit, das die Versorgung der Sekundärwicklung (B2) gewährleisten oder sperren kann, wobei die besagten Mittel (10) zwischen der Hauptwicklung (B1) und der Steuerung des Halbleiterelements (T2) angeordnet sind und ein zweites Halbleiterelement (T1) aufweisen, das an die Steuerung des ersten Halbleiterelements (T2) angeschlossen ist, dadurch gekennzeichnet, dass
    das zweite Halbleiterelement (T1) das erste Halbleiterelement (T2) sperrt, wenn die Spannung zwischen der Steuerung und dem Ausgang des zweiten Halbleiterelements (T1) einen höheren Grenzwert (Vs) erreicht als ein entsprechender Wert (V1) bei Beginn des Schliessens des Elektromagneten ;
    die Umschaltmittel (10) einen Spannungsanpassungskreis (11) umfassen, der an die Hauptwicklung (B1) und die Steuerung des zweiten Halbleiterelements (T1) angeschlossen ist, und der ermöglicht, eine repräsentative Spannung des in der Hauptwicklung (B1) umlaufenden Stroms zu messen und diese Spannung zu integrieren, um die erforderliche Zeit zum Erreichen der Grenzspannung (Vs) anzupassen.
  2. Versorgungskreis nach Anspruch 1, dadurch gekennzeichnet, dass der Anpassungskreis (11) einen RC-Filter umfasst, bestehend aus einem mit zwei in Reihe geschalteten Widerständen (R5, R6) ausgerüsteten resistiven Element und einem Kondensator (C1), wobei einer der Widerstände (R5) an die Hauptwicklung (B1) angeschlossen und der andere Widerstand (R6) mit dem Kondensator (C1) parallel geschaltet und an die Versorgungsrückführungsleitung (b) der Spule angeschlossen ist.
  3. Versorgungskreis nach Anspruch 2, dadurch gekennzeichnet, dass die Steuerung des zweiten Halbleiterelements (T1) an einen Eingang (D) des Anpassungskreises (11) zwischen den beiden Widerständen (R5, R6) angeschlossen ist.
  4. Versorgungskreis nach einem der vorstehend genannten Ansprüche, dadurch gekennzeichnet, dass die Steuerung des ersten Halbleiterelements (T2) an einem Anschlusspunkt (C) zwischen einem Widerstand (R3) und einem Widerstand (R4) angeschlossen ist, die zwischen den beiden Versorgungsleitungen (a, b) der Spule in Reihe geschaltet sind.
  5. Versorgungskreis nach einem der vorstehend genannten Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Steuerung des ersten Halbleiterelements (T2) an einem Anschlusspunkt (C) zwischen einem Widerstand (R2) und einer Zener-Diode (Z2) angeschlossen ist, die zwischen den beiden Versorgungsleitungen (a, b) der Spule in Reihe geschaltet sind.
  6. Versorgungskreis nach einem der vorstehend genannten Ansprüche, dadurch gekennzeichnet, dass die beiden Halbleiterelemente (T1, T2) Transistoren sind.
  7. Versorgungskreis nach einem der vorstehend genannten Ansprüche, dadurch gekennzeichnet, dass die Hauptwicklung (B1) und die Sekundärwicklung (B2) zwischen den beiden Versorgungsleitungen (a, b) der Spule parallel angeordnet sind.
  8. Versorgungskreis nach einem der vorstehend genannten Ansprüche, dadurch gekennzeichnet, dass er Messmittel für das Bild des in der Hauptwicklung (B1) umlaufenden Stroms umfasst, wobei diese Mittel mit der besagten Wicklung (B1) in Reihe und parallel zum Anspassungskreis (11) angeordnet sind.
EP96402114A 1995-10-12 1996-10-04 Stromversorgungsschaltung für eine Erregerspule eines Elktromagneten Expired - Lifetime EP0768683B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9512077 1995-10-12
FR9512077A FR2739969B1 (fr) 1995-10-12 1995-10-12 Circuit d'alimentation d'une bobine d'excitation d'un electro-aimant

Publications (2)

Publication Number Publication Date
EP0768683A1 EP0768683A1 (de) 1997-04-16
EP0768683B1 true EP0768683B1 (de) 1999-05-12

Family

ID=9483536

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96402114A Expired - Lifetime EP0768683B1 (de) 1995-10-12 1996-10-04 Stromversorgungsschaltung für eine Erregerspule eines Elktromagneten

Country Status (16)

Country Link
US (1) US5805405A (de)
EP (1) EP0768683B1 (de)
JP (1) JP3792314B2 (de)
CN (1) CN1136590C (de)
AU (1) AU710707B2 (de)
BR (1) BR9605102A (de)
CA (1) CA2187662C (de)
CZ (1) CZ287509B6 (de)
DE (1) DE69602407T2 (de)
ES (1) ES2131382T3 (de)
FR (1) FR2739969B1 (de)
HU (1) HU221224B1 (de)
MX (1) MX9604704A (de)
PL (1) PL181225B1 (de)
SG (1) SG52852A1 (de)
TW (1) TW409448B (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE0202689D0 (sv) * 2002-09-11 2002-09-11 Siemens Elema Ab Electromagnetic Brake Assembly and Power Supply
DE102017119600B4 (de) * 2017-08-25 2019-06-27 Infineon Technologies Austria Ag Verfahren zum Ansteuern eines Transistorbauelements mit nicht-isoliertem Gate, Ansteuerschaltung und elektronische Schaltung
US10468966B1 (en) * 2018-06-01 2019-11-05 Infineon Technologies Ag Gate interface circuit
WO2020151805A1 (de) * 2019-01-21 2020-07-30 Eaton Intelligent Power Limited Gleichstrom-schutzschaltgerät

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE756904A (fr) * 1969-10-24 1971-03-01 Lucifer Sa Dispositif de commande d'un electro-aimant
CH523583A (fr) * 1971-04-23 1972-05-31 Lucifer Sa Dispositif de commande d'un électro-aimant
DE2132717A1 (de) * 1971-07-01 1973-01-18 Bosch Gmbh Robert Ansteuerschaltung fuer magnetventile hoher schaltgeschwindigkeit, insbesondere einer hydraulischen stelleinrichtung
FR2290009A1 (fr) * 1974-10-28 1976-05-28 Telemecanique Electrique Circuits d'alimentation d'electro-aimants et electro-aimants comprenant ces circuits
CH607260A5 (de) * 1975-09-05 1978-11-30 Lucifer Sa
US4227231A (en) * 1978-09-05 1980-10-07 Eaton Corporation Integral relay low voltage retentive means
JPS5828074A (ja) * 1981-08-11 1983-02-18 Nachi Fujikoshi Corp ソレノイドバルブ
KR900009058B1 (ko) * 1987-02-25 1990-12-17 미쓰비시전기 주식회사 전자 스위치 장치
JPH0528727Y2 (de) * 1988-03-31 1993-07-23

Also Published As

Publication number Publication date
HU9602811D0 (en) 1996-11-28
HU221224B1 (en) 2002-08-28
CA2187662C (fr) 1999-09-07
EP0768683A1 (de) 1997-04-16
FR2739969A1 (fr) 1997-04-18
CZ298596A3 (cs) 1998-09-16
HUP9602811A2 (en) 1997-07-28
BR9605102A (pt) 1998-07-07
AU6816796A (en) 1997-07-31
HUP9602811A3 (en) 2000-03-28
CZ287509B6 (en) 2000-12-13
DE69602407T2 (de) 1999-09-23
PL181225B1 (pl) 2001-06-29
AU710707B2 (en) 1999-09-30
US5805405A (en) 1998-09-08
DE69602407D1 (de) 1999-06-17
SG52852A1 (en) 1998-09-28
TW409448B (en) 2000-10-21
JPH09161637A (ja) 1997-06-20
ES2131382T3 (es) 1999-07-16
JP3792314B2 (ja) 2006-07-05
FR2739969B1 (fr) 1997-11-14
CA2187662A1 (fr) 1997-04-13
MX9604704A (es) 1997-04-30
CN1151597A (zh) 1997-06-11
CN1136590C (zh) 2004-01-28
PL316485A1 (en) 1997-04-14

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