EP2406642A1 - Procédé de contrôle des propriétés électriques d'un circuit de charge commandé en mode commuté, et configuration de circuit pour la mise en oeuvre de ce procédé - Google Patents

Procédé de contrôle des propriétés électriques d'un circuit de charge commandé en mode commuté, et configuration de circuit pour la mise en oeuvre de ce procédé

Info

Publication number
EP2406642A1
EP2406642A1 EP10709464A EP10709464A EP2406642A1 EP 2406642 A1 EP2406642 A1 EP 2406642A1 EP 10709464 A EP10709464 A EP 10709464A EP 10709464 A EP10709464 A EP 10709464A EP 2406642 A1 EP2406642 A1 EP 2406642A1
Authority
EP
European Patent Office
Prior art keywords
load circuit
control signal
load
inductive
circuit
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Withdrawn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
EP10709464A
Other languages
German (de)
English (en)
Inventor
Andreas Schmidtlein
Rainer Baumgaertner
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2406642A1 publication Critical patent/EP2406642A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/14Measuring resistance by measuring current or voltage obtained from a reference source
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/26Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
    • G01R27/2611Measuring inductance
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/28Testing of electronic circuits, e.g. by signal tracer
    • G01R31/2832Specific tests of electronic circuits not provided for elsewhere
    • G01R31/2836Fault-finding or characterising
    • G01R31/2837Characterising or performance testing, e.g. of frequency response

Definitions

  • the invention describes a method for monitoring the electrical properties of a clocked controlled load circuit and a circuit arrangement for carrying out the method.
  • the present invention overcomes the problem described above
  • a method for monitoring the electrical properties of a clocked controlled load circuit, wherein the load circuit comprises at least one ohmic and at least one inductive component comprising the following steps: defining at least a first and a second control signal, wherein the control signals are determined such that upon actuation of the Load circuit with the first control signal outweighs the inductive behavior of the load circuit and dominates the ohmic behavior of the load circuit when driving the load circuit with the second control signal, detecting at least one of the control signal and the / the ohmic and / or inductive components dependent variable in controlling the Load circuit with the first control signal and when driving the load circuit with the second control signal, determining the deviations of the measured variables of the expected based on the nominal values of the inductive and resistive components, classifying the state of the load circuit based on the determined deviations.
  • the inventive method and the circuit arrangement according to the invention have the advantage that the ohmic and / or inductive properties of the entire load circuit are fully evaluated and thereby a very reliable statement about the functioning of the entire load circuit and optionally can be made about the source of error.
  • an integrative measuring method is used to detect the measured variables, as described in the earlier German patent application DE 10 2008 04 09 31. Especially with short pulse durations of the control signal, this measurement method delivers very precise results.
  • the method according to the invention can be used both for the initial test prior to the commissioning of the load circuit and for the monitoring of the load circuit during operation.
  • control signals are set such that a mechanical activation of the load circuit is avoided. This could not be guaranteed in previously used methods due to the necessary length of the control pulses, so that it often came to an unwanted activation of the load component, so for example to start an electric motor or to open / close a valve. Further features and advantages of embodiments of the invention will become apparent from the following description with reference to the accompanying figures.
  • FIG. 1 shows a schematic representation of a circuit arrangement for carrying out the method according to the invention
  • FIG. 2 shows the course of a measured variable as a function of time
  • FIG. 3 the course of a measured variable as a function of the pulse duration
  • FIG. 4 shows the profile of measured variables as a function of the pulse duration and the ohmic and inductive properties
  • FIG. 5 shows a schematic representation of the sequence of the method according to the invention.
  • FIG. 1 shows the essential elements of a load circuit to which the method according to the invention can be applied and a measuring unit for carrying out the method according to the invention.
  • the load circuit 100 comprises a series circuit of a controllable switching means 101, an inductive load 102 and a measuring means 103, in the simplest case in the form of an ohmic resistor (shunt resistor).
  • a terminal of the switching means 101 is connected to a supply voltage UB.
  • a connection of the measuring means 103 is connected to ground.
  • the measuring means 103 is shown as an ohmic resistance, but can also be realized only by a conductor track section with a known resistance value.
  • the switching means 101 is acted upon by a control unit 104 with a clocked pulse width modulated control signal and serves to control the current flow through the load circuit 100 and thus also by the inductive load 102.
  • a measuring unit 105 may detect one or more of the control signal and the ohmic and inductive components of the load circuit 100 dependent variables. Measured variables can be, for example, the current in the measuring means 103, the voltage at the load 102, the voltage drop at the switching means 101 and / or the supply voltage UB.
  • Such load circuits 100 occur, for example, in the control of a solenoid valve.
  • the switching means 101 is then usually designed as a semiconductor switch, the inductive load 102 as a solenoid for controlling the solenoid valve and the measuring means 103 as a precision resistor.
  • load circuits are found in the control of DC motors.
  • the switching means 101 is configured, for example, as a semiconductor switch.
  • the DC motor which for example serves to drive a hydraulic pump, represents the load 102 and a conductor track section with known resistance serves as a measuring means 103.
  • the method according to the invention is described below by way of example with reference to the current in the measuring means 103 as a measured variable, but can also be used analogously for all other measured variables which depend on the control signal and on the ohmic and inductive properties of the load circuit.
  • FIG. 2 schematically shows a typical course of the current in a load circuit, which consists exclusively of an inductance L and an ohmic resistance R.
  • At least two control signals are determined in a step S 501 (see FIG. 5) such that a first control signal has a frequency and a duty cycle, so that the current flow in the load circuit 100 is determined by the inductor. tive component of the load circuit 100 is stamped, and that a second control signal has a frequency and a duty cycle, so that the current flow in the load circuit 100 is characterized by the ohmic component of the load circuit 100. Frequency and duty cycle are determined depending on the nominal values of the individual components of the load circuit 100.
  • control signals can also be set such that a mechanical activation of the load circuit 100 is avoided, which is desired in many applications. For example, when checking a load circuit with an electric motor as the load component, unintentional starting of the motor should be avoided at all costs. Likewise is also unintentional
  • Measuring method described can be applied analogously in direct measurement of the measured quantities.
  • Both the inductive component and the ohmic component of the load circuit 100 have so-called nominal values L 0 and R 0 . Assuming a constant voltage, the current integral ⁇ Idt is higher than that
  • the two control signals determined such that for the first control signal, the inductive behavior of the load circuit 100 and for the second control signal outweighs the ohmic behavior of the load circuit, the course of the current integral Idt in response to the pulse duration ⁇ in split two parts.
  • FIG. 4 schematically shows a first current integral for a purely inductive load circuit.
  • the first current integral Idt as a function F1 (L 0, ⁇ ), which depends only on the nominal value L 0 of the inductive component of the load circuit and the pulse duration ⁇ of the control signal.
  • F1 L 0, ⁇
  • F2 R 0 , ⁇
  • step S 504 see FIG. 5
  • the functionality and advantageously also the error source are classified.
  • This classification can be realized for example by a classification table, a decision matrix, a map or even a decision tree. Depending on the degree of detail of the table, the matrix, the map or the tree, a very detailed error diagnosis is possible. If, for example, the measured current integral in the inductively embossed region deviates greatly from the nominally expected current integral of the inductance L 0 , this indicates a short-circuit in the inductive load 102 (cf.
  • Example motor short circuit or valve spool short circuit If, on the other hand, the measured current integral in the region of the ohmic embossing has a large deviation from the nominally expected current integral of the resistance Ro, this can be indicative of the alloying of the switching means 101.
  • Deviations from both expected inductive and expected ohmic behavior are also possible to detect errors that can not be detected by evaluating a single measured variable.
  • a relatively high-impedance shunt of an inductive load 102 for example a DC motor, on the one hand leads to a decrease in the ohmic
  • the inventive method can be used both as an initial test before commissioning of the load circuit 100 and as a permanent monitoring of the load circuit 100 during operation.
  • the first control signal is advantageously determined as a signal having a relatively high frequency and a relatively short pulse duration.
  • Control signal is set as a signal with a relatively low frequency, but larger, preferably average pulse width.
  • the frequency of the control signal is advantageously cyclically changed while the duty cycle remains the same.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Electric Motors In General (AREA)
  • Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
  • Control Of Voltage And Current In General (AREA)
  • Electronic Switches (AREA)

Abstract

L'invention concerne un procédé et une configuration de circuit pour le contrôle des propriétés électriques d'un circuit de charge (100) commandé en mode commuté, le circuit de charge présentant au moins une composante ohmique et au moins une composante inductive, procédé caractérisé en ce qu'il comprend les étapes suivantes : détermination d'au moins un premier et un second signal de commande, les signaux de commande étant déterminés de façon que lors de la commande du circuit de charge (100) au premier signal de commande, le comportement inductif du circuit de charge (100) prédomine, et que lors de la commande du circuit de charge (100) au second signal de commande, le comportement ohmique du circuit de charge (100) prédomine; détection d'au moins un paramètre de mesure dépendant du signal de commande et de la composante ou des composantes ohmiques et/ou inductives, lors de la commande du circuit de charge (100) au premier signal de commande, et lors de la commande du circuit de charge (100) au second signal de commande; détermination des écarts des paramètres de mesure par rapport aux paramètres de mesure escomptés sur la base des valeurs nominales des composantes inductives et ohmiques; classification de l'état du circuit de charge (100) en se basant sur les écarts déterminés.
EP10709464A 2009-03-09 2010-03-08 Procédé de contrôle des propriétés électriques d'un circuit de charge commandé en mode commuté, et configuration de circuit pour la mise en oeuvre de ce procédé Withdrawn EP2406642A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009001400A DE102009001400A1 (de) 2009-03-09 2009-03-09 Verfahren zur Überwachung der elektrischen Eigenschaften eines getaktet gesteuerten Lastkreises und Schaltungsanordnung zur Durchführung des Verfahrens
PCT/EP2010/052876 WO2010102965A1 (fr) 2009-03-09 2010-03-08 Procédé de contrôle des propriétés électriques d'un circuit de charge commandé en mode commuté, et configuration de circuit pour la mise en oeuvre de ce procédé

Publications (1)

Publication Number Publication Date
EP2406642A1 true EP2406642A1 (fr) 2012-01-18

Family

ID=42313640

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10709464A Withdrawn EP2406642A1 (fr) 2009-03-09 2010-03-08 Procédé de contrôle des propriétés électriques d'un circuit de charge commandé en mode commuté, et configuration de circuit pour la mise en oeuvre de ce procédé

Country Status (5)

Country Link
US (1) US8786294B2 (fr)
EP (1) EP2406642A1 (fr)
CN (1) CN102348992B (fr)
DE (1) DE102009001400A1 (fr)
WO (1) WO2010102965A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140167786A1 (en) * 2012-12-14 2014-06-19 Schneider Electric USA, Inc. Current Sensor For Power Measurement Applications
KR102084801B1 (ko) * 2014-03-10 2020-03-05 매그나칩 반도체 유한회사 스위치 제어 회로, 스위치 제어 방법 및 이를 이용한 변환기
WO2017050331A1 (fr) 2015-09-21 2017-03-30 Schaeffler Technologies AG & Co. KG Unité de commande ainsi que procédé de surveillance du fonctionnement d'un actionneur électromagnétique
CN113395082B (zh) * 2021-06-21 2023-02-28 北京博瑞微电子科技有限公司 采用周期性开关电感负载传输线的频率可调时钟传输装置

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Publication number Priority date Publication date Assignee Title
GB1200688A (en) * 1968-09-26 1970-07-29 Siemens Ag Electronic test apparatus for the automatic examination of a characteristic curve of a circuit element
FR2573212B1 (fr) * 1984-11-13 1987-01-02 Thomson Csf Mat Tel Procede et systeme de mesure de la qualite d'au moins un contact electrique
US5481187A (en) 1991-11-29 1996-01-02 Caterpillar Inc. Method and apparatus for determining the position of an armature in an electromagnetic actuator
FI89636C (fi) 1991-12-10 1993-10-25 Valtion Teknillinen Foerfarande foer bestaemning av induktans
DE19831381A1 (de) 1997-07-14 1999-01-21 Philips Patentverwaltung Elektrischer Antrieb
FR2780513B1 (fr) * 1998-06-26 2000-09-08 Poste Procede de surveillance d'actionneurs electro-mecaniques et dispositifs pour sa mise en oeuvre
WO2001014897A1 (fr) 1999-08-24 2001-03-01 Siemens Aktiengesellschaft Procede et dispositif pour mesurer la resistance ohmique du circuit de stator d'une machine a induction
US6458611B1 (en) * 2001-03-07 2002-10-01 Intel Corporation Integrated circuit device characterization
DE10229760B4 (de) * 2002-07-03 2005-10-20 Daimler Chrysler Ag Positionsermittlungsverfahren für einen induktiven Positionssensor
DE102005034859A1 (de) 2005-07-26 2007-02-01 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Meßanordnung zur Messung des Induktivitäts- und des Widerstandswertes eines induktiven Sensors
DE102008040931B4 (de) 2008-08-01 2021-04-22 Robert Bosch Gmbh Verfahren zur Messwertermittlung in einem getaktet angesteuerten System

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2010102965A1 *

Also Published As

Publication number Publication date
CN102348992B (zh) 2015-01-14
US8786294B2 (en) 2014-07-22
CN102348992A (zh) 2012-02-08
WO2010102965A1 (fr) 2010-09-16
US20120249166A1 (en) 2012-10-04
DE102009001400A1 (de) 2010-09-16

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