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DE19713448A1 - Automatic cut-out device for electrical machine - Google Patents

Automatic cut-out device for electrical machine

Info

Publication number
DE19713448A1
DE19713448A1 DE19713448A DE19713448A DE19713448A1 DE 19713448 A1 DE19713448 A1 DE 19713448A1 DE 19713448 A DE19713448 A DE 19713448A DE 19713448 A DE19713448 A DE 19713448A DE 19713448 A1 DE19713448 A1 DE 19713448A1
Authority
DE
Germany
Prior art keywords
input
temperature sensor
electrical machine
switching
output
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.)
Withdrawn
Application number
DE19713448A
Other languages
German (de)
Inventor
Kai Dipl Ing Garrels
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.)
ABB Patent GmbH
Original Assignee
ABB Patent 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 ABB Patent GmbH filed Critical ABB Patent GmbH
Priority to DE19713448A priority Critical patent/DE19713448A1/en
Publication of DE19713448A1 publication Critical patent/DE19713448A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
    • H02H7/0852—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load directly responsive to abnormal temperature by using a temperature sensor
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
    • G05B19/054—Input/output
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2300/00—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H
    • H01H2300/03—Application domotique, e.g. for house automation, bus connected switches, sensors, loads or intelligent wiring
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H89/00—Combinations of two or more different basic types of electric switches, relays, selectors and emergency protective devices, not covered by any single one of the other main groups of this subclass
    • H01H89/06—Combination of a manual reset circuit with a contactor, i.e. the same circuit controlled by both a protective and a remote control device
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/0822—Integrated protection, motor control centres
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/20—Smart grids as enabling technology in buildings sector
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/14—Protecting elements, switches, relays or circuit breakers

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Programmable Controllers (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

The cut-out device has a positive temperature coefficient resistance (8), acting as a temperature sensor (2), for monitoring the operating temperature of the electrical machine (1) and coupled to a control device (3) for an electromechanical cut-out switch (40). The control device has an input/output device for a programmable internal control (30) in addition to the sensor input, the control signal for the cut-out switch provided at a binary output.

Description

Die Erfindung bezieht sich auf eine Einrichtung zur Überwachung der Temperatur einer elektrischen Maschine und zur Abschaltung bei Übertemperatur nach dem Oberbegriff des Anspruchs 1.The invention relates to a device for monitoring the temperature an electrical machine and to switch off at overtemperature after Preamble of claim 1.

Eine solche Einrichtung ist in Fig. 3 dargestellt. Die Schaltungsanordnung gemäß Fig. 3 ist dem Hauptkatalog 1996/97, Teil 1 der ABB Schalt- und Steuerungstech­ nik GmbH Heidelberg, Druckschrift Nr. 1SAC 1001 97 L0101, Seite 2/32 entnom­ men. Diese Schaltungsanordnung zeigt eine elektrische Maschine 1, die über ein elektromechanisches Schaltgerät 4, 4a, 4b mit einem Niederspannungsnetz 5 ver­ bindbar ist. Die elektrische Maschine 1 enthält einen Temperaturfühler 2, der durch drei PTC-Widerstände 8 gebildet ist. Der Temperaturfühler 2 ist an ein spezielles Steuergerät 3 angeschlossen, das eine Auswertung eines vom Temperaturfühler 2 gelieferten Meßsignal vornimmt und in Abhängigkeit vom Ergebnis der Auswertung ein Steuersignal zur Steuerung eines Elektromagneten 4a zur Betätigung des Schalters 4 bildet. Der Elektromagnet 4a ist über Kontakte 4b mit dem speziellen Steuergerät 3 verbunden.Such a device is shown in Fig. 3. The circuit arrangement according to FIG. 3 is taken from the main catalog 1996/97, part 1 of ABB Schalt- und Steuerungstechnik GmbH Heidelberg, publication no. 1SAC 1001 97 L0101, page 2/32. This circuit arrangement shows an electrical machine 1 , which can be connected to a low-voltage network 5 via an electromechanical switching device 4 , 4 a, 4 b. The electrical machine 1 contains a temperature sensor 2 , which is formed by three PTC resistors 8 . The temperature sensor 2 is connected to a special control device 3 , which carries out an evaluation of a measurement signal supplied by the temperature sensor 2 and, depending on the result of the evaluation, forms a control signal for controlling an electromagnet 4 a for actuating the switch 4 . The electromagnet 4 a is connected via contacts 4 b to the special control device 3 .

Diese bekannte Einrichtung arbeitet an sich problemlos, hat aber den Nachteil, daß ein spezielles Steuergerät erforderlich ist.This known device works on itself without problems, but has the disadvantage that a special control unit is required.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Einrichtung anzugeben, die mit einem reduzierten Aufwand realisierbar ist. Diese Aufgabe wird bei einer Einrich­ tung nach dem Oberbegriff des Anspruchs 1 durch dessen kennzeichnende Merkma­ le gelöst. Mit der Erfindung wird vorgeschlagen, anstelle eines speziellen Steuerge­ räts ein sogenanntes intelligentes E/A-Gerät einer speicherprogrammierbaren Steuerung SPS zu verwenden, das für eine Auswertung des Meßsignals des Tempe­ raturfühlers, also des jeweiligen Widerstandswertes des wenigstens einen PTC-Widerstands eingerichtet ist. In technischen Anlagen, die ohnehin eine SPS enthalten, läßt sich damit kostengünstig ein thermischer Maschinenschutz realisie­ ren.The invention is therefore based on the object of specifying a device which can be implemented with reduced effort. This task is carried out at a facility  device according to the preamble of claim 1 by its characteristic feature le solved. With the invention it is proposed instead of a special Steuerge a so-called intelligent I / O device of a programmable logic device Control PLC to be used for evaluating the measurement signal of the tempe temperature sensor, i.e. the respective resistance value of the at least one PTC resistor is set up. In technical systems that already have a PLC contain, thermal machine protection can be realized inexpensively ren.

Eine weitere Beschreibung der Erfindung erfolgt nachstehend anhand eines in den Zeichnungsfiguren dargestellten Ausführungsbeispiels.A further description of the invention is given below with reference to the in the Drawing figures shown embodiment.

Es zeigen:Show it:

Fig. 1 eine erfindungsgemäße Einrichtung zum thermischen Maschinen­ schutz, Fig. 1 a protection device of the invention for the thermal machine,

Fig. 2 ein E/A-Gerät, das in einer Einrichtung gemäß Fig. 1 einsetzbar ist, Fig. 2 shows an I / O device that is used in a device according to Fig. 1,

Fig. 3 eine Einrichtung nach dem Stand der Technik. Fig. 3 shows a device according to the prior art.

Fig. 1 zeigt eine erfindungsgemäße Anordnung mit einer elektrischen Maschine 1, die wenigstens einen integrierten PTC-Widerstand 8 als Meßfühler 2 enthält und die über ein elektromechanisches Schaltgerät 40, also ein Schütz, und ein Motorschutz­ gerät 6 an ein Niederspannungsnetz 5 angeschlossen ist. An ein intelligentes E/A-Gerät 30 einer SPS 300 ist der Meßfühler 2 und die Betätigungsspule 40a des Schaltgeräts 40 angeschlossen. Sowohl das Motorschutzgerät 6 als auch das Schaltgerät 40 weisen Hilfskontakte HK auf, die jeweils mit Eingängen des E/A-Geräts 30 verbunden sind. Das Motorschutzgerät 6 trennt die Maschine 1 bei Überstrom oder Kurzschluß vom Netz 5. Das E/A-Gerät 30 ist über einen Feldbus 7 mit anderen Geräten 36 der SPS 300 verbunden. Die SPS 300 kann ein kompaktes Gerät sein, kann aber auch als dezentralisiertes System realisiert sein. Fig. 1 shows an arrangement according to the invention with an electrical machine 1 , which contains at least one integrated PTC resistor 8 as a sensor 2 and which is connected via an electromechanical switching device 40 , ie a contactor, and a motor protection device 6 to a low-voltage network 5 . The sensor 2 and the actuating coil 40 a of the switching device 40 are connected to an intelligent I / O device 30 of a PLC 300 . Both the motor protection device 6 and the switching device 40 have auxiliary contacts HK, which are each connected to inputs of the I / O device 30 . The motor protection device 6 disconnects the machine 1 from the network 5 in the event of an overcurrent or short circuit. The I / O device 30 is connected to other devices 36 of the PLC 300 via a fieldbus 7 . The PLC 300 can be a compact device, but can also be implemented as a decentralized system.

Fig. 2 zeigt beispielhaft ein E/A-Gerät 30 mit Funktionseinheiten 31 bis 35. Diese Funktionseinheiten sind eine Stromversorgung 31, Binäreingaben 32, Binärausga­ ben 33, PTG-Eingänge 34 und eine Busankopplung 35 zur Verbindung des E/A-Geräts 30 mit einem Bus, insbesondere einem Feldbus 7. Die PTG-Eingänge 34 sind für den Anschluß von Meßfühler 2 vorgesehen und enthalten einen Mikropro­ zessor mit einem Programm zur Auswertung des oder der Meßsignale und zur Bil­ dung wenigstens eines Ausgangssignals, das über einen der Binärausgänge 33 zu einer Betätigungseinrichtung 40a eines Schaltgeräts 4, 40 führbar ist. Fig. 2 shows an example of an I / O device 30 to functional units 31 to 35. These functional units are a power supply 31 , binary inputs 32 , binary outputs 33 , PTG inputs 34 and a bus coupling 35 for connecting the I / O device 30 to a bus, in particular a field bus 7 . The PTG inputs 34 are provided for the connection of sensor 2 and contain a microprocessor with a program for evaluating the measurement signal or signals and for forming at least one output signal, which via one of the binary outputs 33 to an actuator 40 a of a switching device 4 , 40 is feasible.

Die wesentlichen Funktionen der erfindungsgemäßen Einrichtung entsprechen damit den Funktionen der Einrichtung gemäß dem Stand der Technik.The essential functions of the device according to the invention thus correspond the functions of the device according to the prior art.

Claims (2)

1. Einrichtung zur Überwachung der Temperatur einer elektrischen Maschi­ ne (1), die wenigstens einen PTC-Widerstand (8) als Temperaturfühler (2) enthält, wobei
  • a) die Einrichtung ein Steuergerät (3, 30) enthält, an das der Temperaturfühler (2) angeschlossen ist und das zur Auswertung eines vom Temperaturfühler (2) gelieferten Meßsignals eingerichtet ist, und
  • b) ein elektromechanisches Schaltgerät (4, 40) vorhanden ist, das vom Steuer­ gerät (3, 30) angesteuert ist und das bei Übertemperatur der elektrischen Maschine (1) eine elektrische Verbindung mit einem Niederspannungsnetz (5) unterbricht, dadurch gekennzeichnet, daß
  • c) das Steuergerät ein Ein/Ausgabe-Gerät (30) einer speicherprogrammierba­ ren Steuerung (300) ist, das außer binären Eingängen (32) und Ausgängen (33) zusätzlich einen Eingang (34) zum Anschluß wenigstens eines Tempe­ raturfühlers (2) aufweist, wobei
  • d) das E/A-Gerät (30) dafür eingerichtet ist, das Meßsignal auszuwerten und ein Steuersignal zur Ansteuerung des Schaltgeräts (40) zu bilden, das über einen der binären Ausgänge (33) ausgebbar ist.
1. Device for monitoring the temperature of an electrical machine ne ( 1 ), which contains at least one PTC resistor ( 8 ) as a temperature sensor ( 2 ), wherein
  • a) the device contains a control device ( 3 , 30 ) to which the temperature sensor ( 2 ) is connected and which is set up to evaluate a measurement signal supplied by the temperature sensor ( 2 ), and
  • b) an electromechanical switching device ( 4 , 40 ) is present, which is controlled by the control device ( 3 , 30 ) and which interrupts an electrical connection to a low-voltage network ( 5 ) if the electrical machine ( 1 ) becomes too hot, characterized in that
  • c) the control device is an input / output device ( 30 ) of a programmable controller ( 300 ) which, in addition to binary inputs ( 32 ) and outputs ( 33 ), also has an input ( 34 ) for connecting at least one temperature sensor ( 2 ) , in which
  • d) the I / O device ( 30 ) is set up to evaluate the measurement signal and to form a control signal for controlling the switching device ( 40 ), which can be output via one of the binary outputs ( 33 ).
2. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß an das Ein/Ausgabe-Gerät (30) außerdem ein oder mehrere Hilfskontakte (HK) angeschlos­ sen sind zur Feststellung des Schaltzustands des elektromechanischen Schaltgeräts (4, 40) oder auch eines vorgeschalteten Motorschutzgeräts (6) zur Abschaltung bei Überstrom oder Kurzschlußstrom, wobei das Ein/Ausgabe-Gerät (30) dafür einge­ richtet ist, ein Störungsmeldesignal zu bilden, das über einen Bus (7) zu anderen Busteilnehmern (36) übertragbar ist.2. Device according to claim 1, characterized in that to the input / output device ( 30 ) also one or more auxiliary contacts (HK) are ruled out to determine the switching state of the electromechanical switching device ( 4 , 40 ) or an upstream motor protection device ( 6 ) for switching off in the event of overcurrent or short-circuit current, the input / output device ( 30 ) being set up to form a fault signal which can be transmitted to other bus users ( 36 ) via a bus ( 7 ).
DE19713448A 1997-04-01 1997-04-01 Automatic cut-out device for electrical machine Withdrawn DE19713448A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19713448A DE19713448A1 (en) 1997-04-01 1997-04-01 Automatic cut-out device for electrical machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19713448A DE19713448A1 (en) 1997-04-01 1997-04-01 Automatic cut-out device for electrical machine

Publications (1)

Publication Number Publication Date
DE19713448A1 true DE19713448A1 (en) 1998-10-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE19713448A Withdrawn DE19713448A1 (en) 1997-04-01 1997-04-01 Automatic cut-out device for electrical machine

Country Status (1)

Country Link
DE (1) DE19713448A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1255266A1 (en) * 2001-05-04 2002-11-06 Tyco Electronics AMP GmbH Bus controlled relays
FR2841398A1 (en) * 2002-06-25 2003-12-26 Henri Gilbert Control of an electric motor used in hazardous environment, uses sensors in motor to provide data so winding temperature and hot-spot or surface temperature can be calculated
US6970093B1 (en) 1999-05-29 2005-11-29 Ebm-Papst St. Georgen Gmbh & Co. Kg Method for configuring the alarm device of an electrical motor and motor for implementing said method
EP2184830A1 (en) * 2008-10-13 2010-05-12 Siemens Aktiengesellschaft Device for monitoring the temperature of a multi-phase energy coil of an electric machine
DE102008057070A1 (en) * 2008-11-13 2010-05-20 Kriwan Industrie-Elektronik Gmbh Protective device for electric motors
CN103072125A (en) * 2013-01-14 2013-05-01 南京久驰机电实业有限公司 Brake control method of electric tool

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3012364C2 (en) * 1980-03-29 1985-06-05 Triumph-Adler Aktiengesellschaft für Büro- und Informationstechnik, 8500 Nürnberg Method for feeding an electric motor
DE3442472A1 (en) * 1984-11-22 1986-05-28 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Electronic monitoring apparatus
DE3836990A1 (en) * 1988-10-31 1990-05-03 Porsche Ag SURVEILLANCE PROTECTION CIRCUIT
DE4109867A1 (en) * 1991-03-26 1992-10-01 Bosch Gmbh Robert PROTECTIVE DEVICE FOR ELECTRIC MOTORS

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3012364C2 (en) * 1980-03-29 1985-06-05 Triumph-Adler Aktiengesellschaft für Büro- und Informationstechnik, 8500 Nürnberg Method for feeding an electric motor
DE3442472A1 (en) * 1984-11-22 1986-05-28 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Electronic monitoring apparatus
DE3836990A1 (en) * 1988-10-31 1990-05-03 Porsche Ag SURVEILLANCE PROTECTION CIRCUIT
DE4109867A1 (en) * 1991-03-26 1992-10-01 Bosch Gmbh Robert PROTECTIVE DEVICE FOR ELECTRIC MOTORS

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
WRATIL,Peter: Speicherprogrammierbare Steuerungen in der Automatisierungstechnik, Vogel Buchverlag, Würzburg, 1989, S.122-132 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6970093B1 (en) 1999-05-29 2005-11-29 Ebm-Papst St. Georgen Gmbh & Co. Kg Method for configuring the alarm device of an electrical motor and motor for implementing said method
EP1255266A1 (en) * 2001-05-04 2002-11-06 Tyco Electronics AMP GmbH Bus controlled relays
FR2841398A1 (en) * 2002-06-25 2003-12-26 Henri Gilbert Control of an electric motor used in hazardous environment, uses sensors in motor to provide data so winding temperature and hot-spot or surface temperature can be calculated
EP2184830A1 (en) * 2008-10-13 2010-05-12 Siemens Aktiengesellschaft Device for monitoring the temperature of a multi-phase energy coil of an electric machine
DE102008057070A1 (en) * 2008-11-13 2010-05-20 Kriwan Industrie-Elektronik Gmbh Protective device for electric motors
CN103072125A (en) * 2013-01-14 2013-05-01 南京久驰机电实业有限公司 Brake control method of electric tool
CN103072125B (en) * 2013-01-14 2015-07-01 南京久驰机电实业有限公司 Brake control method of electric tool

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