DE3446645A1 - Circuit arrangement for forming a current signal - Google Patents

Circuit arrangement for forming a current signal

Info

Publication number
DE3446645A1
DE3446645A1 DE19843446645 DE3446645A DE3446645A1 DE 3446645 A1 DE3446645 A1 DE 3446645A1 DE 19843446645 DE19843446645 DE 19843446645 DE 3446645 A DE3446645 A DE 3446645A DE 3446645 A1 DE3446645 A1 DE 3446645A1
Authority
DE
Germany
Prior art keywords
circuit arrangement
current signal
forming
current
diagonal
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Withdrawn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
DE19843446645
Other languages
German (de)
Inventor
Karl Dipl.-Ing. 8500 Nürnberg Kapp
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to DE19843446645 priority Critical patent/DE3446645A1/en
Publication of DE3446645A1 publication Critical patent/DE3446645A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H02P7/03—Arrangements for regulating or controlling the speed or torque of electric DC motors for controlling the direction of rotation of DC motors
    • H02P7/04—Arrangements for regulating or controlling the speed or torque of electric DC motors for controlling the direction of rotation of DC motors by means of a H-bridge circuit

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Of Direct Current Motors (AREA)

Abstract

The invention relates to a circuit arrangement for forming a signal corresponding to the current through a load (5). The load (5) is located in one diagonal of a transistor bridge (1 to 4), to the other diagonal of which the feed voltage source is connected. The current signal is picked up at two matching transistors (3, 4) of two parallel bridge branches (1, 3; 2, 4). <IMAGE>

Description

Schaltungsanordnung zur Bildung eines StromsignalesCircuit arrangement for generating a current signal

Die Erfindung betrifft eine Schaltungsanordnung zur Bildung eines dem Strom durch einen Verbraucher entsprechenden Signales mit einem in Reihe mit dem Verbraucher liegenden Widerstand, an dem das Stromsignal abgegriffen ist.The invention relates to a circuit arrangement for forming a the current through a consumer corresponding signal with a in series with the resistance at which the current signal is tapped.

In der Figur 1 ist eine bekannte Schaltungsanordnung dieser Art dargestellt. Sie weist eine aus vier Transistoren 1 bis 4 bestehende Brücke auf, in deren einer Diagonale ein Gleichstrommotor 5 liegt und deren andere Diagonale über Klemmen 6 an einer Gleichspannungsquelle angeschlossen ist. Für die Einschaltung des Motors 5 in der einen Drehrichtung sind beispielsweise die Transistoren 2 und 3 leitend, so daß der Strom durch den Motor 5 in der gestrichelt gezeichneten Richtung fließt. In Reihe mit der Brücke 1 bis 4 liegt ein Meßwiderstand 7, an dem über einen Verstärker 8 ein dem Motorstrom entsprechendes Signal abgegriffen ist.A known circuit arrangement of this type is shown in FIG. It has a bridge consisting of four transistors 1 to 4, in one of which A direct current motor 5 is located on the diagonal and the other diagonal over terminals 6 is connected to a DC voltage source. For switching on the motor 5 In one direction of rotation, for example, transistors 2 and 3 are conductive, so that the current flows through the motor 5 in the direction shown in dashed lines. In series with the bridge 1 to 4 is a measuring resistor 7 to which an amplifier 8 a signal corresponding to the motor current is tapped.

Der Erfindung liegt die Aufgabe zugrunde, eine Schaltungsanordnung der eingangs genannten Art so auszubilden, daß ein zusätzlicher Strommeßwiderstand überflüssig ist.The invention is based on the object of a circuit arrangement of the type mentioned in such a way that an additional current measuring resistor is superfluous.

Diese Aufgabe ist erfindungsgemäß dadurch gelöst, daß der Widerstand ein elektrisch steuerbarer Widerstand ist, der an sich vorhanden ist und zur Steuerung des Motors dient.According to the invention, this object is achieved in that the resistor is an electrically controllable resistor that is present per se and for control of the engine.

Anhand eines in der Figur 2 dargestellten Ausführunssbeispieles ist die Erfindungs nachfolgend näher erläutert.On the basis of an exemplary embodiment shown in FIG the invention explained in more detail below.

In der Figur 2 sind Teile, die mit Teilen der Figur 1 gleich sind, mit den gleichen Bezugszeichen bezeichnet. In FIG. 2, parts that are the same as parts of FIG. 1 are denoted by the same reference numerals.

Die Transistoren 1 bis 4 sind dabei Feldeffekttransistoren. An den einander entsprechenden Transistoren 3 und 4 der beiden Brückenzweige sind zwei Verstärker 9, 10 angeschlossen, die jeweils eine dem Stromfluß durch die Transistoren 3, 4 entsprechende Spannung auf Ausgangsleitungen 11, 12 bilden. Bei dem gestrichelt gezeichneten Stromfluß ist dabei die Ausgangsspannung des Verstärkers 9 ein Maß für den Motorstrom, während in dem Fall, in dem der Motor in entgegengesetzter Richtung betrieben ist und demgemäß die Transistoren 1, 4 leitend sind, die Spannung des Verstärkers 10 das Maß für den Motorstrom ist. Die Steuerung des Motorstromes erfolgt dabei wie bei der Schaltung gemäß Figur 1 durch die Transistoren 1 bis 4.The transistors 1 to 4 are field effect transistors. To the Corresponding transistors 3 and 4 of the two bridge branches are two Amplifier 9, 10 connected, each one of the current flow through the transistors 3, 4 form the corresponding voltage on output lines 11, 12. The dashed line The current flow shown is the output voltage of the amplifier 9 is a measure for the motor current, while in the case where the motor is in the opposite direction is operated and accordingly the transistors 1, 4 are conductive, the voltage of the Amplifier 10 is the measure for the motor current. The motor current is controlled as in the circuit according to FIG. 1, through the transistors 1 to 4.

2 Patentansprüche 2 Figuren - Leerseite -2 claims 2 figures - blank page -

Claims (2)

Patentansprüche 1. Schaltungsanordnung zur Bildung eines dem Strom durch einen Verbraucher (5) entsprechenden Signales mit einem in Reihe mit dem Verbraucher liegenden Widerstand (3, 4), an dem das Stromsignal abgegriffen ist, d a d u r c h g e k e n n z e i c h n e t , daß der Widerstand (3, 4) ein elektrisch steuerbarer Widerstand ist.Claims 1. Circuit arrangement for forming a stream by a consumer (5) corresponding signal with a signal in series with the consumer lying resistor (3, 4) at which the current signal is tapped, d a d u r c h e k e n n n z e i c h n e t that the resistor (3, 4) is an electrically controllable Resistance is. 2. Schaltungsanordnung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß der Verbraucher (5) in einer Diagonale einer Transistorbrücke (1 bis 4) liegt, an deren anderer Diagonale die Speisespannungsquelle angeschlossen ist und bei der das Stromsignal an zwei einander entsprechenden Transistoren (3, 4) zweier paralleler Brückenzweige (1, 3; 2, 4) abgegriffen ist.2. Circuit arrangement according to claim 1, d a d u r c h g e k e n n z e i c h n e t that the consumer (5) in a diagonal of a transistor bridge (1 to 4), to whose other diagonal the supply voltage source is connected and in which the current signal is applied to two corresponding transistors (3, 4) two parallel bridge branches (1, 3; 2, 4) is tapped.
DE19843446645 1984-12-20 1984-12-20 Circuit arrangement for forming a current signal Withdrawn DE3446645A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19843446645 DE3446645A1 (en) 1984-12-20 1984-12-20 Circuit arrangement for forming a current signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19843446645 DE3446645A1 (en) 1984-12-20 1984-12-20 Circuit arrangement for forming a current signal

Publications (1)

Publication Number Publication Date
DE3446645A1 true DE3446645A1 (en) 1986-07-03

Family

ID=6253394

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19843446645 Withdrawn DE3446645A1 (en) 1984-12-20 1984-12-20 Circuit arrangement for forming a current signal

Country Status (1)

Country Link
DE (1) DE3446645A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2612644A1 (en) * 1987-03-19 1988-09-23 Heidelberger Druckmasch Ag CURRENT MEASURING DEVICE, IN PARTICULAR FOR DETERMINING THE CURRENT OF A DC MOTOR
DE3928651A1 (en) * 1989-08-30 1991-03-07 Wabco Westinghouse Fahrzeug ELECTRONIC CIRCUIT FOR MONITORING A POWER AMPLIFIER AND ITS LOAD
FR2687863A1 (en) * 1992-02-25 1993-08-27 Rahban Thierry Four-quadrant energy converter for a load
DE4338714A1 (en) * 1993-11-12 1995-05-18 Bosch Gmbh Robert Circuit arrangement for current measurement via a switching transistor
EP0822652A1 (en) * 1996-08-01 1998-02-04 Philips Patentverwaltung GmbH Control circuit for driving a DC motor in two directions

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3115805A1 (en) * 1981-04-13 1983-01-05 Petr Dmitrievi&ccaron; Andrienko Method for automatic load switching, and an automatic load switch for carrying it out

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3115805A1 (en) * 1981-04-13 1983-01-05 Petr Dmitrievi&ccaron; Andrienko Method for automatic load switching, and an automatic load switch for carrying it out

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2612644A1 (en) * 1987-03-19 1988-09-23 Heidelberger Druckmasch Ag CURRENT MEASURING DEVICE, IN PARTICULAR FOR DETERMINING THE CURRENT OF A DC MOTOR
DE3928651A1 (en) * 1989-08-30 1991-03-07 Wabco Westinghouse Fahrzeug ELECTRONIC CIRCUIT FOR MONITORING A POWER AMPLIFIER AND ITS LOAD
US5205619A (en) * 1989-08-30 1993-04-27 Wabco Westinghouse Fahrzeugbremsen Gmbh Electronic circuit for surveillance of final amplifier and its load
FR2687863A1 (en) * 1992-02-25 1993-08-27 Rahban Thierry Four-quadrant energy converter for a load
DE4338714A1 (en) * 1993-11-12 1995-05-18 Bosch Gmbh Robert Circuit arrangement for current measurement via a switching transistor
DE4338714C2 (en) * 1993-11-12 2000-06-21 Bosch Gmbh Robert Circuit arrangement for current measurement via a switching transistor
EP0822652A1 (en) * 1996-08-01 1998-02-04 Philips Patentverwaltung GmbH Control circuit for driving a DC motor in two directions

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