EP0140093B1 - Schütz mit Steuerstufe und Überstromauslöser - Google Patents

Schütz mit Steuerstufe und Überstromauslöser Download PDF

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Publication number
EP0140093B1
EP0140093B1 EP19840110871 EP84110871A EP0140093B1 EP 0140093 B1 EP0140093 B1 EP 0140093B1 EP 19840110871 EP19840110871 EP 19840110871 EP 84110871 A EP84110871 A EP 84110871A EP 0140093 B1 EP0140093 B1 EP 0140093B1
Authority
EP
European Patent Office
Prior art keywords
contactor
current
winding
power amplifier
circuit arrangement
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
Application number
EP19840110871
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0140093A2 (de
EP0140093A3 (en
Inventor
Erich Huber
Anton Dipl.-Ing. Happach
Lutz Dipl.-Ing. Bergmann
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.)
Schaltbau GmbH
Original Assignee
Schaltbau GmbH
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 Schaltbau GmbH filed Critical Schaltbau GmbH
Publication of EP0140093A2 publication Critical patent/EP0140093A2/de
Publication of EP0140093A3 publication Critical patent/EP0140093A3/de
Application granted granted Critical
Publication of EP0140093B1 publication Critical patent/EP0140093B1/de
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/22—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil
    • H01H47/32—Energising current supplied by semiconductor device
    • H01H47/325—Energising current supplied by semiconductor device by switching regulator
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2445—Electromagnetic mechanisms using a reed switch

Definitions

  • the invention relates to a circuit arrangement for DC operation for contactors according to the preamble of claim 1.
  • the supply voltage supplying the contactor to the excitation coil in pulses via an electronic contactless switch or transistor during the pull-in and hold phase is determined by comparing a voltage proportional to the excitation current with a reference voltage.
  • the reference voltage is raised for a time longer than the duration of the tightening phase from the value required for holding to or above the value required for tightening. This ensures that the contactor is securely tightened to save energy.
  • the time for raising the reference voltage can be ended by measuring and evaluating the change in the magnetic field that occurs in the vicinity of the air gap when it is closed.
  • this period can also be set by a timer, e.g. a monostable multivibrator with adjustable duration can be determined.
  • the invention is based on the object of specifying a circuit arrangement for direct current operation for contactors of the type mentioned, which additionally detects and switches off overcurrents in the load circuit of the contactor.
  • the contactor also performs the protective function of a current-limiting circuit breaker in addition to the usual function of switching on and off.
  • the same line can advantageously be used to control the electronic switching stage as to signal an overcurrent, i.e. the control input for the switching stage is also the signal output.
  • a positive pole 1 of a traction battery 2 is connected to first main contacts 3 of an electromagnetic contactor 4 via a first input terminal E1.
  • Second main contacts 5 of the contactor 4 are connected to the negative pole 6 of the battery 2 via a second input terminal E2.
  • the traction battery 2 emits, for example, a DC voltage of 96V.
  • a control and regulating device 7 is connected as a load via output terminals A1, A2, which feeds an armature winding 8 and a field winding 9 of a direct current shunt motor 10, which serves, for example, as a traction motor for an electric car.
  • the main contacts 3, 5 are controlled with the aid of an excitation coil 11 of the contactor 4.
  • the excitation coil 11 is fed by a power amplifier 12.
  • the power amplifier 12 is controlled via a modulator (transistor switching stage) 13.
  • the modulator 13 is connected to a control / signaling terminal 15 of the contactor via a series resistor 14.
  • the modulator 13 is also connected on the input side via a protective gas switch contact 16 to the control terminal of a thyristor 17.
  • the thyristor 17 lies with its anode at the input of the modulator 13 and with its cathode at a connection terminal S2 of the contactor.
  • the one supply connection of the power amplifier 13 is also connected to this connection terminal S2.
  • the other supply terminal of amplifier 12 is above another terminal S1 of the contactor at the positive pole 18 of a Steuerbat t ery 19.
  • the negative pole 20 of the battery 19 of the contactor is connected to the terminal S2.
  • the control battery 19 outputs, for example, a DC voltage of 12V.
  • a command transmitter 21 is arranged between the terminals between the pole 18 and the control / signaling terminal 15.
  • the command transmitter 21 can be designed with low power since only control signals or signal signals have to be processed, while the excitation coil 11 is driven in terms of power via the power amplifier 12.
  • the command transmitter 21 is additionally provided with a current detection device in order to detect an overcurrent trip of the contactor 4.
  • the control / signaling terminal 15 is acted upon by the command transmitter 21 with a control signal of, for example, 12V.
  • the modulator 13 first delivers a long pulse for the contactor's pick-up period and then "calculation pulses" for the holding period with a Frequency of, for example, 333 Hz to the power amplifier 12.
  • the first long pulse briefly applies a high power to the excitation coil 11, which ensures that the contactor is reliably pulled on.
  • the excitation coil 11 only has to be supplied with reduced power, the ratio of pause times (eg 2 ms) to pulse times (eg 1 ms) of the "computing pulses" determining the holding current.
  • the positive control signal specified via the command transmitter 21 is switched off (OV potential at terminal 15), whereby the modulator 13 outputs the Activation of the power amplifier 12 serving "computing pulses" ended.
  • the switching contacts of the protective gas switching contact 16 arranged in the immediate vicinity of the leads E1-A1 or E2-A2 are closed as a result of the magnetic field exceeding a predefinable limit value .
  • the thyristor 17 is ignited through its gate connection and consequently the input of the electromagnetic control stage of the contactor is short-circuited.
  • a short-circuit current flows from the command transmitter 21 via the control / signaling terminal 15, the series resistor 14 and the thyristor 17 to the negative terminal S2.
  • the series resistor 14 essentially serves to determine and limit the short-circuit current.
  • the command transmitter 21 and the thyristor 17 can be designed with poor performance.
  • the electronic control stage of the contactor no longer has a positive control signal, which results in de-energization of the coil 11 and opening of the main contacts 3, 5. As a result, the overcurrent is reduced and the contacts of the protective gas switch contact 16 open again.
  • the command transmitter 21 is provided with a current detection device for error detection and reporting.
  • This current detection device detects both the low control current flowing in normal operation and the increased short-circuit current occurring in the event of a fault. If the short-circuit current occurs, this is interpreted as a fault message for an overcurrent shutdown.
  • a thyristor 17 instead of a thyristor 17, other switching elements with a memory function can also be used in the event of a fault. Furthermore, a magnetic field-dependent field plate can also be used instead of the protective gas switch contact 16.
  • FIG. 2 shows a first variant of the circuit according to FIG. 1.
  • the contactor 4 has two separate windings instead of a single excitation coil 11, namely a high current winding 11A for pulling the relay (pull-in winding) and a low current winding 11H for holding the relay (holding winding).
  • the high-current winding 11A is fed by a first and the low-current winding 11H by a second power amplifier 12A or 12H.
  • the power amplifier 12H is connected directly and the power amplifier 12A is connected to the series resistor 14 via a modulator 13A (monoflop).
  • the power amplifiers 12A, 12H are each connected to the poles 18, 20 of the control battery 19.
  • the rest of the circuit arrangement is as described under Fig. 1.
  • the positive control signal triggers the leading edge of the modulator 13A, which drives the power amplifier 12A for the starting winding 11A (high-current winding) during a predefinable starting time.
  • the power amplifier 12H for the holding winding 11H receives the control signal directly. After the starting time of the modulator 13A, the power amplifier 12A and thus the starting winding 11A are switched off, since the low-current winding 11 H is sufficient to maintain the holding phase alone.
  • the winding wire can be correspondingly thin. be dimensioned so that the high-current winding 11A takes up only a small part of the available winding space. There is therefore sufficient space for the holding winding 11 H to be designed for long-term operation.
  • FIG. 3 shows a second variant of the circuit according to FIG. 1.
  • a high current winding 11A and a low current winding 11H are provided.
  • the winding 11A is connected to a power amplifier 12A and the winding 11H is connected to a power amplifier 12H, the power amplifier 12A in turn being controlled directly via a modulator 13A (monoflop) and the power amplifier 12H.
  • the two windings 11A, 11H are connected in series.
  • the rest of the circuit arrangement is as described under Fig. 1.
  • the leading edge of the control signal triggers the modulator 13A, which results in the activation of the power amplifier 12A and thus the activation of the pickup winding 11A.
  • the holding winding 11H is switched on via the amplifier 12H. It results there is a high starting current across winding 11A and a low current across winding 11H.
  • amplifier 12A is switched off and a holding current remains through windings 11A, 11H which are in series.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Protection Of Generators And Motors (AREA)
  • Relay Circuits (AREA)
EP19840110871 1983-09-20 1984-09-12 Schütz mit Steuerstufe und Überstromauslöser Expired EP0140093B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833333833 DE3333833A1 (de) 1983-09-20 1983-09-20 Schaltungsanordnung zum gleichstrombetrieb fuer schuetze
DE3333833 1983-09-20

Publications (3)

Publication Number Publication Date
EP0140093A2 EP0140093A2 (de) 1985-05-08
EP0140093A3 EP0140093A3 (en) 1985-10-02
EP0140093B1 true EP0140093B1 (de) 1987-03-18

Family

ID=6209506

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840110871 Expired EP0140093B1 (de) 1983-09-20 1984-09-12 Schütz mit Steuerstufe und Überstromauslöser

Country Status (3)

Country Link
EP (1) EP0140093B1 (enrdf_load_stackoverflow)
JP (1) JPS60121641A (enrdf_load_stackoverflow)
DE (1) DE3333833A1 (enrdf_load_stackoverflow)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2612685B1 (fr) * 1987-03-16 1992-11-06 Marcoz Bruno Dispositif de commande pour l'ouverture et la fermeture de circuits de puissance electrique
DE3719298A1 (de) * 1987-06-10 1988-12-22 Bayerische Motoren Werke Ag Verfahren zum loesen der kontakte eines klebenden relais sowie schaltungsanordnung zur durchfuehrung des verfahrens
DE3908192A1 (de) * 1989-03-14 1990-09-20 Licentia Gmbh Elektronische schuetzansteuerung
DE4034485A1 (de) * 1990-10-30 1992-05-07 Ernst H Grundmann Niederspannungsschaltgeraet
DE19511795A1 (de) * 1994-08-26 1996-10-02 Siemens Ag Elektromechanisches Schaltgerät
DE4430382A1 (de) * 1994-08-26 1996-02-29 Siemens Ag Elektromechanisches Schaltgerät
DE102021206315A1 (de) 2021-06-21 2022-12-22 Robert Bosch Gesellschaft mit beschränkter Haftung Steuerschaltung und Ladevorrichtung zum Aufladen eines Akkupacks mit einer Steuerschaltung

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE402311C (de) * 1921-07-12 1924-09-20 Siemens Schuckertwerke G M B H Schaltung fuer Selbstausschalter mit Fernsteuerung
SE337860B (enrdf_load_stackoverflow) * 1969-12-16 1971-08-23 Asea Ab
DE2305343A1 (de) * 1973-02-03 1974-08-08 Baum Elektrophysik Gmbh Schaltung an einer erregerspule fuer schuetze oder relais
DE2513043A1 (de) * 1975-03-25 1976-10-07 Baum Elektrophysik Gmbh Schaltung zum gleichstrombetrieb fuer schuetze oder relais
DE2542724A1 (de) * 1975-09-25 1977-04-07 Vdo Schindling Ueberstromschalter
US4215383A (en) * 1978-02-16 1980-07-29 Ramsey Controls, Inc. Current regulator for DC motors including sensitivity control means therefor
DE3208660A1 (de) * 1981-03-12 1982-09-23 Lucas Industries Ltd., Birmingham, West Midlands Steuerschaltung

Also Published As

Publication number Publication date
EP0140093A2 (de) 1985-05-08
DE3333833A1 (de) 1985-04-04
DE3333833C2 (enrdf_load_stackoverflow) 1987-06-04
EP0140093A3 (en) 1985-10-02
JPS60121641A (ja) 1985-06-29

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