WO2013007511A2 - Procédé de régulation du régime d'un moteur d'entraînement électrique d'un appareil ménager et appareil ménager - Google Patents

Procédé de régulation du régime d'un moteur d'entraînement électrique d'un appareil ménager et appareil ménager Download PDF

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Publication number
WO2013007511A2
WO2013007511A2 PCT/EP2012/062313 EP2012062313W WO2013007511A2 WO 2013007511 A2 WO2013007511 A2 WO 2013007511A2 EP 2012062313 W EP2012062313 W EP 2012062313W WO 2013007511 A2 WO2013007511 A2 WO 2013007511A2
Authority
WO
WIPO (PCT)
Prior art keywords
signal
drive motor
time interval
control device
speed
Prior art date
Application number
PCT/EP2012/062313
Other languages
German (de)
English (en)
Other versions
WO2013007511A3 (fr
Inventor
Matthias Dreßler
Original Assignee
BSH Bosch und Siemens Hausgeräte 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 BSH Bosch und Siemens Hausgeräte GmbH filed Critical BSH Bosch und Siemens Hausgeräte GmbH
Publication of WO2013007511A2 publication Critical patent/WO2013007511A2/fr
Publication of WO2013007511A3 publication Critical patent/WO2013007511A3/fr

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Classifications

    • 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
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
    • H02P29/02—Providing protection against overload without automatic interruption of supply
    • H02P29/032—Preventing damage to the motor, e.g. setting individual current limits for different drive conditions
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/04—Signal transfer or data transmission arrangements
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/24—Spin speed; Drum movements
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting

Definitions

  • the invention relates to a method for regulating the rotational speed of an electric drive motor of a household appliance by means of a control device, which is fed to a tachometer a tachometer, which characterizes the current speed of the drive motor, and which generates a control signal in response to the speed signal and outputs to the drive motor.
  • the speedometer signal is checked for plausibility by means of the control device. If an implausibility of the tacho signal is detected, the drive motor is switched off after a predetermined time interval from the determination of the implausibility.
  • the invention also relates to a household appliance for carrying out such a method.
  • the interest here is directed to the regulation of the rotational speed of a drive motor, by means of which a laundry drum of a washing machine is driven. It is state of the art to use a tachometer or a tachometer to measure the current speed of the laundry drum.
  • the tachometer provides a tacho signal, which describes the respective instantaneous speed of the laundry drum. Namely, the tacho signal usually contains so-called tacho pulses, which are voltage pulses.
  • the speed of the laundry drum or the drive motor is controlled, namely by means of a control device. In the present case, it is particularly a digital control device, which may include a digital signal processor and a microcontroller.
  • the regulation thus takes place with the aid of a computer program which is stored in the control device.
  • the controller structure is implemented using a program code.
  • independent safety function is detected after a predetermined - set as a constant - time interval that no further tachometer pulses arrive, and the drive motor is turned off. Within the predetermined time interval thus takes place an accelerated speed increase. In the prior art, therefore, this time interval must be dimensioned so that no risk can occur within this time interval by moving the washing machine due to the maximum acceleration of the laundry drum.
  • An inventive method is designed for controlling the rotational speed of an electric drive motor of a household appliance by means of a control device.
  • the control device is fed to a tachometer signal a tachometer, which characterizes the current speed of the drive motor.
  • the control device generates a control signal as a function of the speed signal and outputs this control signal to the drive motor.
  • the actuating signal sets the speed of the drive motor.
  • the control device checks whether the received tacho signal is plausible or not. If an implausibility of the tacho signal is detected, the drive motor is switched off after a predetermined time interval from the determination of the implausibility.
  • the drive motor is switched off when no plausible tacho signal is received within the time interval or the implausibility continues over the entire predetermined time interval.
  • the control signal as it exists at the time of determining the implausibility of the tacho signal, is maintained unchanged.
  • the invention is based on the recognition that in the prior art, the dimensioning of the predetermined time interval is relatively problematic, because always compromises are required. Namely, this time interval in the prior art should on the one hand be as small as possible in order to minimize the risk of displacement of the household appliance due to the acceleration of the drum. On the other hand, this time interval in the prior art should also be as large as possible to prevent the shutdown of the drive motor due to start-up problems - caused by Wäscheklemmer, undervoltage or the like. By the method according to the invention it is now possible that the time interval is made larger than in the prior art, because the risk of mechanical displacement of the household appliance is no longer present.
  • the household appliance is a device for the care of laundry - especially a washing machine.
  • the drive motor in particular a laundry drum for receiving the laundry items is driven.
  • the household appliance can be added due to an uncontrolled acceleration of the laundry drum in the spin mode. This problem is now circumvented by the method according to the invention. So the controller checks if the tacho signal is plausible or not. As part of the review of the tacho signal, the control device can check whether the tacho signal voltage pulses or Tachoimpulse includes or not. In the absence of voltage pulses - during control - the tacho signal is assessed as implausible.
  • An implausibility is thus determined if during the regulation of the speed, the voltage pulses were initially present and then a failure of the voltage pulses is detected.
  • the failure of the voltage pulses indicates that a defect or an error of the speedometer device.
  • a tacho-defect can also look like that the tacho pulses are delivered, but the impulses are implausible.
  • Checking the tacho signal for plausibility can thus involve comparing a voltage pulse of the tacho signal with a reference pulse. If a deviation of the voltage pulse from the reference pulse is detected, then the tacho signal is assessed as implausible. Thus, even those tachometer errors can be detected in which the voltage pulses are indeed present, but these deviate from a standard due to a tachometer defect.
  • the drive motor can be switched off after the predetermined time interval has elapsed. In this case, an error message may be issued that the speedometer device must be checked. However, if within the predetermined time interval the tacho signal is again assessed to be plausible, then the regulation of the rotational speed can be continued and the operation of the drive motor can be continued. A shutdown of the drive motor due to an undervoltage or other, little relevant error is thus prevented.
  • An inventive household appliance comprises an electric drive motor, a tachometer device for generating a tacho signal, as well as a control device for outputting an actuating signal to the drive motor in dependence on the tacho signal.
  • the control device can check the speed signal for plausibility and turn off the drive motor after the expiry of a predetermined time interval after determining an implausibility.
  • the control device can be within the predetermined Time interval, the control signal as it is present at the time of determining the implausibility of the tacho signal, maintained unchanged.
  • FIGURE illustrates a schematic representation of a household appliance according to an embodiment of the invention.
  • a household appliance 1 is a washing machine in the embodiment.
  • the household appliance 1 includes a laundry drum 2, which serves to receive laundry.
  • an electric drive motor 3 is provided, which is controlled by means of a control device 4.
  • the household appliance 1 also includes a tachometer 5, which is designed to measure the respective current speed of the laundry drum 2. Alternatively, by means of the tachometer 5, the current speed of the drive motor 3 can be measured.
  • the control device 4 is a digital controller structure which comprises, for example, a digital signal processor and a microcontroller.
  • the regulation of the rotational speed of the drive motor 3 or the laundry drum 2 takes place with the aid of a computer program or program code stored in the control device 4.
  • the tachometer 5 generates a tacho signal 6, which is the control device 4 is supplied.
  • the speed signal 6 is thus delivered to the control device 4.
  • the control device 4 receives the speed signal 6 and thus knows the respective current speed of the laundry drum 2.
  • the control device 4 generates an actuating signal 7, which is output to the drive motor 3. With the control signal 7, a setpoint for the speed is specified.
  • the control device 4 also checks whether the tacho signal 6 is plausible and thus the tachometer 5 has a defect or not.
  • the tacho signal 6 can be evaluated as implausible in two cases.
  • the tacho signal 6 is judged to be implausible if, during the control of the rotational speed, the voltage pulses of the tacho signal 6 suddenly fail, so that no further voltage pulses are present. If such a lack of voltage pulses is detected, the tacho signal 6 is assessed as implausible and a defect of the tachometer 5 is detected.
  • the tacho signal 6 is also assessed as implausible if the existing voltage pulses are implausible or deviate from a reference pulse.
  • a time measurement begins in the control device 4. Specifically, a time interval is predetermined in the control device 4, after which the drive motor 3 is to be switched off. This time interval can be, for example, in a value range from 1 s to 60 s, in particular in a value range from 20 s to 50 s.
  • the predetermined time interval thus starts with the determination of the implausibility of the tacho signal 6. After expiration of this time interval, the drive motor 3 is switched off, if no plausible tacho signal 6 is detected within this time interval. However, if the tacho signal 6 is again assessed to be plausible within the predetermined time interval, the regulation of the rotational speed is continued.
  • the interest is directed to the behavior of the control device 4 during the predetermined time interval after determining the implausibility of the tacho signal 6.
  • the control signal 7 remains unchanged within the predetermined time interval, namely, as it is present at the time of determining the implausibility of the tacho signal.
  • the speed of the laundry drum 2 also remains constant after detection of the implausibility, as it was just before the determination of the implausibility.
  • Such behavior of the control device 4 prevents the household appliance 1 from being displaced due to acceleration of the laundry drum 2 and causing mechanical damage.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

L'invention concerne un procédé de régulation du régime d'un moteur d'entraînement (3) électrique d'un appareil ménager (1) au moyen d'un dispositif de régulation (4) qui reçoit d'un dispositif tachymétrique (5) un signal tachymétrique (6) caractérisant le régime réel du moteur d'entraînement (3) et qui, en fonction du signal tachymétrique (6), génère un signal de réglage (7) qu'il envoie au moteur d'entraînement (3), le procédé comportant les étapes suivantes: vérifier la vraisemblance du signal tachymétrique (6) au moyen du dispositif de régulation (4) et, si une invraisemblance est déterminée, déconnecter le moteur d'entraînement (3) au bout d'un certain laps de temps à partir de la constatation de l'invraisemblance, le signal de réglage (7) étant maintenu constant durant ledit laps de temps, tel qu'il se présente au moment de la détermination de l'invraisemblance du signal tachymétrique (6).
PCT/EP2012/062313 2011-07-11 2012-06-26 Procédé de régulation du régime d'un moteur d'entraînement électrique d'un appareil ménager et appareil ménager WO2013007511A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011078923A DE102011078923A1 (de) 2011-07-11 2011-07-11 Verfahren zum Regeln der Drehzahl eines elektrischen Antriebsmotors eines Haushaltsgeräts und Haushaltsgerät
DE102011078923.5 2011-07-11

Publications (2)

Publication Number Publication Date
WO2013007511A2 true WO2013007511A2 (fr) 2013-01-17
WO2013007511A3 WO2013007511A3 (fr) 2013-10-03

Family

ID=46516689

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/062313 WO2013007511A2 (fr) 2011-07-11 2012-06-26 Procédé de régulation du régime d'un moteur d'entraînement électrique d'un appareil ménager et appareil ménager

Country Status (2)

Country Link
DE (1) DE102011078923A1 (fr)
WO (1) WO2013007511A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2770101A1 (fr) * 2013-02-22 2014-08-27 Electrolux Home Products Corporation N.V. Machine de blanchisserie

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4104887A1 (de) 1990-02-19 1991-08-22 C E Set S R L Antriebseinrichtung fuer eine waschmaschinentrommel

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2752539B2 (ja) * 1991-09-21 1998-05-18 株式会社日立製作所 車両用電動機の制御装置
JP3265811B2 (ja) * 1994-03-30 2002-03-18 松下電器産業株式会社 サーボモータの制御装置
DE19733533C2 (de) * 1997-08-02 2000-01-27 Ako Werke Gmbh & Co Überwachungsschaltung für die Steuerung eines Elektromotors, insbesondere Wäschetrommelmotors
DE10035783A1 (de) * 1999-08-07 2001-02-08 Bosch Gmbh Robert Vorrichtung zur Überwachung eines Meßsystems eines elektrischen Antriebs
DE102007036668A1 (de) * 2007-08-03 2009-02-19 BSH Bosch und Siemens Hausgeräte GmbH Schaltungsanordnung zur Überwachung einer Tachoeinrichtung für einen Antriebsmotor einer Trommel einer Waschmaschine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4104887A1 (de) 1990-02-19 1991-08-22 C E Set S R L Antriebseinrichtung fuer eine waschmaschinentrommel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2770101A1 (fr) * 2013-02-22 2014-08-27 Electrolux Home Products Corporation N.V. Machine de blanchisserie
WO2014128226A1 (fr) * 2013-02-22 2014-08-28 Electrolux Home Products Corporation N.V. Machine de blanchisserie

Also Published As

Publication number Publication date
WO2013007511A3 (fr) 2013-10-03
DE102011078923A1 (de) 2013-01-17

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