EP0843324A1 - Stromversorgungsschaltung für Elektromagnet - Google Patents

Stromversorgungsschaltung für Elektromagnet Download PDF

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Publication number
EP0843324A1
EP0843324A1 EP97402718A EP97402718A EP0843324A1 EP 0843324 A1 EP0843324 A1 EP 0843324A1 EP 97402718 A EP97402718 A EP 97402718A EP 97402718 A EP97402718 A EP 97402718A EP 0843324 A1 EP0843324 A1 EP 0843324A1
Authority
EP
European Patent Office
Prior art keywords
thyristor
circuit
winding
supply
high 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
EP97402718A
Other languages
English (en)
French (fr)
Other versions
EP0843324B1 (de
Inventor
Nicolas Tech. Hertzog
Thierry Ing. Ourth
Michel Ing. Ledroit
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 Industries SAS
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 EP0843324A1 publication Critical patent/EP0843324A1/de
Application granted granted Critical
Publication of EP0843324B1 publication Critical patent/EP0843324B1/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

Definitions

  • the invention relates to a supply circuit for a coil for an electromagnet. provided with a single winding, comprising a power source of continuous low voltage, an alternating high voltage power source, both mounted across the winding, and a switching device mounted in series with the high voltage source and suitable for securing or blocking high voltage winding supply.
  • a coil can be made up of two windings, one main winding sized to support most of the calling power, and an auxiliary winding sufficiently dimensioned to provide the power necessary to maintain the movable frame.
  • This type of double winding coil however, has a significant size disadvantage.
  • the invention therefore aims to supply a coil electromagnet with single winding from an inexpensive supply circuit and can be used indifferently for voltages varying from 100 to 500 Volts.
  • the supply circuit is characterized in that the switching device includes a thyristor mounted between the high source voltage and winding, and a thyristor control circuit mounted across the thyristor and connected to its trigger; the control circuit allows the conduction of the thyristor during the delivery by the high voltage source of an alternation positive of a voltage wave.
  • the supply circuit of the invention therefore does not require a device reduction in consumption because the supply is stopped at high voltage while the winding remains supplied with low voltage, stopping taking place automatically at zero crossing of the alternating voltage passing through the thyristor.
  • FIG. 1 The diagram visible in Figure 1 represents the supply circuit of a coil 10, provided with a single winding 11, with an electromagnet for a device contactor type switch.
  • the electromagnet includes the coil 10, a circuit fixed magnetic and a movable magnetic circuit intended to be attracted by the circuit magnetic fixed when the coil is energized.
  • the movement of the mobile magnetic circuit is triggered by the crossing of the winding 11 of the coil, for a short time, by a current high current call from a high voltage power source alternative 30 disposed across the winding 11; keeping it in position attracted is achieved by the continuous supply of the coil by a current of maintenance, of intensity lower than that of the inrush current, delivered by a source of continuous low voltage 20 also arranged at the terminals of the winding 11, between a high line L1 and a low line L2.
  • the alternative high-voltage power source 30 can be the electrical distribution network and continuous low voltage power source 20 can be a low voltage source of around 12 Volts intended for the power supply of electronic circuits and supplied for example by a transformer whose primary constitutes an element of a current path of a derived electrical circuit in which direct current flows.
  • a diode D1 is preferably connected in series with the source at low voltage 20 to avoid when the coil is supplied by the high voltage source 30 the return of the high charging voltage to the source 20.
  • a switching device 40 is mounted in series with the source to high voltage 30. It is capable of ensuring or blocking the supply of the winding 11 in high voltage.
  • the device 40 comprises in series, between the high power source voltage 30 and winding 11, an on-off switch 41 and a thyristor 42 initiable by a control circuit 43 mounted in parallel to the thyristor between two connection points of anode A and cathode B and connected to its trigger G.
  • control circuit 43 comprises in series a diode D2 the anode of which is connected to the connection point A, a normally closed switch 44 and an RC timing circuit comprising in series a variable resistor R connected to switch 44 and a capacitor C connected to connection point B.
  • the control circuit 43 comprises a diode D3, of the Zener type or with controlled avalanche, located between the trigger G of thyristor 42 and a point of connection E between resistor R and capacitor C, and a freewheeling diode D4 whose cathode and anode are respectively connected to connection points E and B.
  • the low DC voltage delivered by the source 20 is applied to winding 11 but it remains insufficient to produce the ampere-turns necessary to trigger the movement of the mobile magnetic circuit.
  • Closing the switch 41 causes current to flow through the timing circuit RC, which causes the charging of capacitor C.
  • the trigger G of the thyristor receives via the diode D3 a control pulse and the thyristor 42 then becomes passerby.
  • the voltage V D3 is characteristic of the delay in the ignition of the thyristor 42 which represents the time elapsed between the closing of the switch 41 and the activation of the thyristor.
  • the voltage V D3 depends on the charging time of the capacitor C, itself a function of the value of the resistance R which it is possible to vary.
  • the delay in the ignition of the thyristor is adjustable as a function of the value of the resistance.
  • the resistance R is adjusted so that the triggering of the trigger G of the thyristor takes place during the rise of a positive alternation of the voltage wave which must pass through the thyristor.
  • the ignition of thyristor 42 is driven by detection means suitable for opening the switch 44 to avoid passing for a second positive altemance of voltage V in circuit 43.
  • the thyristor 42 conducts and supplies the winding 11 which is sufficiently excited to generate movement of the mobile magnetic circuit.
  • the capacitor C can discharge thanks to the freewheeling diode D4 when the voltage V becomes, in absolute value, greater than the value V D3 .
  • the coil remains only powered by the source current at low DC voltage 20, which allows the circuit to be kept in the attracted position mobile magnetic.
  • the supply of the coil by the source 20 is interrupted by a switching device 21, of the type mechanical or electrical, placed in series between source 20 and diode D1 ( Figure 1).
  • the switch 21 can be placed in parallel with the winding 11, between the cathode of diode D1 and the low line L2 or alternatively, in series with the coil (not illustrated).

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Relay Circuits (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
EP97402718A 1996-11-18 1997-11-13 Stromversorgungsschaltung für Elektromagnet Expired - Lifetime EP0843324B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9614122A FR2756091B1 (fr) 1996-11-18 1996-11-18 Circuit d'alimentation d'une bobine pour electro-aimant
FR9614122 1996-11-18

Publications (2)

Publication Number Publication Date
EP0843324A1 true EP0843324A1 (de) 1998-05-20
EP0843324B1 EP0843324B1 (de) 2001-03-14

Family

ID=9497790

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97402718A Expired - Lifetime EP0843324B1 (de) 1996-11-18 1997-11-13 Stromversorgungsschaltung für Elektromagnet

Country Status (5)

Country Link
US (1) US5946182A (de)
EP (1) EP0843324B1 (de)
DE (1) DE69704251T2 (de)
ES (1) ES2155974T3 (de)
FR (1) FR2756091B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10357144B2 (en) 2013-03-14 2019-07-23 Given Imaging Ltd. Method and circuit for muting electromagnetic interference during maneuvering of a device
US10070932B2 (en) 2013-08-29 2018-09-11 Given Imaging Ltd. System and method for maneuvering coils power optimization
CN105811963B (zh) * 2016-03-16 2019-01-01 西安电炉研究所有限公司 电子放大式晶闸管驱动器及其控制方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4391236A (en) * 1981-07-24 1983-07-05 Outboard Marine Corporation CD Ignition with automatic spark retard
EP0091648A1 (de) * 1982-04-10 1983-10-19 HONEYWELL and PHILIPS MEDICAL ELECTRONICS B.V. Erregerschaltung für Magnetventile
JPS5914615A (ja) * 1982-07-15 1984-01-25 Matsushita Electric Works Ltd 有極電磁石の交流駆動回路
JPS5948903A (ja) * 1982-09-14 1984-03-21 Mitsubishi Electric Corp 電磁石装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4185315A (en) * 1976-09-23 1980-01-22 Honeywell Inc. Apparatus with a single input connectable to electrical energizing sources of different character
US4112477A (en) * 1977-06-06 1978-09-05 General Motors Corporation Circuit for energizing a fuel injector valve coil
JP2561453B2 (ja) * 1983-02-07 1996-12-11 住友重機械工業株式会社 電気集塵機用パルス電源
US4516185A (en) * 1983-09-30 1985-05-07 Siemens-Allis, Inc. Time ratio control circuit for contactor or the like
US5734543A (en) * 1996-03-27 1998-03-31 Clemson University Method and apparatus to improve the performance of AC solenoid devices during lapses in power quality

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4391236A (en) * 1981-07-24 1983-07-05 Outboard Marine Corporation CD Ignition with automatic spark retard
EP0091648A1 (de) * 1982-04-10 1983-10-19 HONEYWELL and PHILIPS MEDICAL ELECTRONICS B.V. Erregerschaltung für Magnetventile
JPS5914615A (ja) * 1982-07-15 1984-01-25 Matsushita Electric Works Ltd 有極電磁石の交流駆動回路
JPS5948903A (ja) * 1982-09-14 1984-03-21 Mitsubishi Electric Corp 電磁石装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 008, no. 095 (E - 242) 2 May 1984 (1984-05-02) *
PATENT ABSTRACTS OF JAPAN vol. 008, no. 139 (E - 253) 28 June 1984 (1984-06-28) *

Also Published As

Publication number Publication date
DE69704251D1 (de) 2001-04-19
FR2756091B1 (fr) 1998-12-24
DE69704251T2 (de) 2001-07-12
FR2756091A1 (fr) 1998-05-22
ES2155974T3 (es) 2001-06-01
EP0843324B1 (de) 2001-03-14
US5946182A (en) 1999-08-31

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