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EP0768683A1 - Stromversorgungsschaltung für eine Erregerspule eines Elktromagneten - Google Patents

Stromversorgungsschaltung für eine Erregerspule eines Elktromagneten Download PDF

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Publication number
EP0768683A1
EP0768683A1 EP96402114A EP96402114A EP0768683A1 EP 0768683 A1 EP0768683 A1 EP 0768683A1 EP 96402114 A EP96402114 A EP 96402114A EP 96402114 A EP96402114 A EP 96402114A EP 0768683 A1 EP0768683 A1 EP 0768683A1
Authority
EP
European Patent Office
Prior art keywords
semiconductor element
winding
supply
circuit
voltage
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.)
Granted
Application number
EP96402114A
Other languages
English (en)
French (fr)
Other versions
EP0768683B1 (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
Original Assignee
Schneider Electric SE
Priority date (The priority date 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 date listed.)
Filing date
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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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
    • H01F7/1833—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 direct current or alternating current supply circuit for 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 high inrush current to cause the initial displacement of the mobile magnetic circuit of the electromagnet, then only the holding winding remains supplied with a lower current to maintain the mobile magnetic circuit in the attracted position, the supply of the call winding being stopped by switching.
  • the invention therefore aims to provide an electronic circuit which ensures switching of the supply of one of the two windings of the coil only when, after the closing of the electromagnet, the current of the coil is very close to reaching the holding current sufficient to keep the mobile magnetic circuit in the attracted position.
  • the supply circuit is characterized in that it comprises means for switching a first semiconductor element with controlled conductivity capable of ensuring or blocking the supply of the secondary winding, said means being arranged between the main winding and the control of the semiconductor element and comprising a second semiconductor element.
  • the switching means are intended to ensure the switching of the first semiconductor element when the voltage between the control and the output of the second semiconductor element reaches a threshold voltage greater than the value corresponding to the start of closing of the electro- magnet.
  • 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 this when the voltage between the control and the output of the second semiconductor element reaches the threshold value.
  • the adaptation circuit advantageously comprises an RC filter consisting of 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 placed in series, one of the resistors being connected to the main winding and the other resistance being placed in parallel with the capacitor and connected to the line. return feed from the coil.
  • the arrangement and the constitution of the switching means thus make it possible to carry out with confidence the switching of the first semiconductor element when the current is close to reaching the holding value after the complete closure of the electromagnet.
  • FIG. 1 The diagram visible in FIG. 1 represents the supply circuit of an excitation coil of an electromagnet according to the invention.
  • the electromagnet not shown here, comprises the excitation coil, a fixed magnetic circuit and a mobile magnetic circuit intended to be attracted by the fixed magnetic circuit when the coil is supplied with current.
  • the solenoid coil is provided with two windings, a main winding B1 and a secondary winding B2.
  • the windings B1 and B2 are placed in parallel between two supply lines, a go line a and a return line b, connected to the respective poles, positive and negative of a source S of current supply.
  • This circuit can operate from a direct current source ( Figures 1 to 3) or rectified alternating current ( Figure 4).
  • the main winding B1 and the secondary winding B2 are capable of triggering the movement of the mobile magnetic circuit. Only the main winding B1 is continuously supplied to allow the mobile magnetic circuit to be kept in the attracted position 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 the winding B2 is controlled by a semiconductor element T2 with controlled conductivity of the transistor type for example.
  • the bipolar or other type of transistor T2 is connected to a threshold voltage circuit 20 which delivers the threshold voltage necessary for its conductivity as soon as the circuit is energized.
  • the circuit 20 can consist of two resistors R3 and R4 connected in series between the lines a and b, the control of the transistor T2 being connected to the point of connection C of the two resistors.
  • the circuit 20 can consist of a resistor R2 and a Zener diode Z2 connected in series between the lines a and b, the control of the transistor T2 being connected to connection point C of the resistor and the diode.
  • the transistor T2 is intended to be blocked after the magnetic circuits of the electromagnet are closed in order to cut the supply to the secondary winding B2.
  • the transistor is blocked by switching means 10 arranged between its control and the main winding B1.
  • the switching means 10 comprise a voltage matching circuit 11 and a semiconductor element T1 with controlled conductivity of the transistor type.
  • the voltage adaptation circuit 11 includes a resistor R5 connected to the main winding B1 and connected in series with a filter of type RC which includes a resistor R6 and a capacitor C1 connected in parallel and connected to the return line b. This circuit constitutes a voltage integrator.
  • the bipolar or other type transistor T1 has an input connected to the control of the transistor T2, an output connected to the return line b, and a control connected to the connection point D between the resistor R5 and the resistor R6 of the circuit 11.
  • the diagram in FIG. 4 represents the circuit supplied from a full-wave rectified alternating current source.
  • a rectifier bridge is arranged between the AC power source S and the supply lines a and b of the circuit so as to supply the latter with full alternating rectified alternating current, each alternation being constituted. straightened sinusoids.
  • a smoothing device 30 is optionally added which makes it possible to attenuate the shape of the 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 negative values. 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 shape of the current is the same, the curve is on the other hand composed of sinusoids.
  • the constitution of the adaptation circuit 11 can therefore remain unchanged compared to 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 closing the electromagnet.
  • the intensity increases through the two windings up to a value l1 of the current from which the mobile magnetic circuit moves towards the fixed magnetic circuit, resulting in a simultaneous reduction of the current up to closing the electromagnet corresponding to time t1 in the figure; these stages are characteristic of the first wave O1 of the current.
  • the current increases again according to an exponential type curve which corresponds to the second wave O2 of the current to reach the holding value lc corresponding to the beginning of the holding phase B.
  • FIG. 6 illustrates the voltage across the resistor R1, the shape of which 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 measurement means constituted by the resistor R1 or even a Zener diode.
  • FIG. 7 illustrates the shape of the voltage across the terminals of the RC circuit of the adaptation circuit 11, that is to say between the control and the output of the 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 the transistor T1. So that the value V1 of the voltage at the terminals of the circuit RC, therefore of the voltage between the control and the output of the transistor T1, remains lower than the threshold value Vs as long as the electromagnet is not closed, we ensures that the value Vm of the first voltage wave O1 'across the terminals of R1 is less than the holding voltage Vc of the second voltage wave O2' corresponding to the holding current lc sufficient to keep the electromagnet closed , which is achieved thanks to the voltage adaptation circuit 11.
  • the two resistors R5 and R6 and the capacitor C1 constitute an integrator which processes the voltage signal delivered at the terminals of the resistor R1 in order to adapt from this signals the time required to reach the trigger threshold voltage Vs of transistor T1.
  • the capacitor C1 discharges during the voltage drop across 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)
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 true EP0768683A1 (de) 1997-04-16
EP0768683B1 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
US10978258B2 (en) * 2019-01-21 2021-04-13 Eaton Intelligent Power Limited Direct current circuit breaker device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2128651A1 (de) * 1971-04-23 1972-11-02 Lucifer S.A. Chemin Lucifer, Carouge-Genf (Schweiz) Einrichtung zur Steuerung eines Elektromagneten
FR2290009A1 (fr) * 1974-10-28 1976-05-28 Telemecanique Electrique Circuits d'alimentation d'electro-aimants et electro-aimants comprenant ces circuits
DE2639233A1 (de) * 1975-09-05 1977-03-17 Lucifer Sa Einrichtung zur steuerung eines elektromagneten
JPS5828074A (ja) * 1981-08-11 1983-02-18 Nachi Fujikoshi Corp ソレノイドバルブ

Family Cites Families (5)

* 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
DE2132717A1 (de) * 1971-07-01 1973-01-18 Bosch Gmbh Robert Ansteuerschaltung fuer magnetventile hoher schaltgeschwindigkeit, insbesondere einer hydraulischen stelleinrichtung
US4227231A (en) * 1978-09-05 1980-10-07 Eaton Corporation Integral relay low voltage retentive means
KR900009058B1 (ko) * 1987-02-25 1990-12-17 미쓰비시전기 주식회사 전자 스위치 장치
JPH0528727Y2 (de) * 1988-03-31 1993-07-23

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2128651A1 (de) * 1971-04-23 1972-11-02 Lucifer S.A. Chemin Lucifer, Carouge-Genf (Schweiz) Einrichtung zur Steuerung eines Elektromagneten
FR2290009A1 (fr) * 1974-10-28 1976-05-28 Telemecanique Electrique Circuits d'alimentation d'electro-aimants et electro-aimants comprenant ces circuits
DE2639233A1 (de) * 1975-09-05 1977-03-17 Lucifer Sa Einrichtung zur steuerung eines elektromagneten
JPS5828074A (ja) * 1981-08-11 1983-02-18 Nachi Fujikoshi Corp ソレノイドバルブ

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 006, no. 106 (M - 213)<1251> 10 May 1983 (1983-05-10) *

Also Published As

Publication number Publication date
MX9604704A (es) 1997-04-30
HU9602811D0 (en) 1996-11-28
JPH09161637A (ja) 1997-06-20
PL181225B1 (pl) 2001-06-29
FR2739969A1 (fr) 1997-04-18
CN1151597A (zh) 1997-06-11
CA2187662C (fr) 1999-09-07
TW409448B (en) 2000-10-21
CZ298596A3 (cs) 1998-09-16
HUP9602811A3 (en) 2000-03-28
AU6816796A (en) 1997-07-31
US5805405A (en) 1998-09-08
HUP9602811A2 (en) 1997-07-28
FR2739969B1 (fr) 1997-11-14
CZ287509B6 (en) 2000-12-13
EP0768683B1 (de) 1999-05-12
PL316485A1 (en) 1997-04-14
BR9605102A (pt) 1998-07-07
DE69602407D1 (de) 1999-06-17
DE69602407T2 (de) 1999-09-23
SG52852A1 (en) 1998-09-28
HU221224B1 (en) 2002-08-28
CN1136590C (zh) 2004-01-28
CA2187662A1 (fr) 1997-04-13
AU710707B2 (en) 1999-09-30
JP3792314B2 (ja) 2006-07-05
ES2131382T3 (es) 1999-07-16

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