EP1505303A1 - Procedure for noise reduction for a machine group - Google Patents

Procedure for noise reduction for a machine group Download PDF

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Publication number
EP1505303A1
EP1505303A1 EP04018592A EP04018592A EP1505303A1 EP 1505303 A1 EP1505303 A1 EP 1505303A1 EP 04018592 A EP04018592 A EP 04018592A EP 04018592 A EP04018592 A EP 04018592A EP 1505303 A1 EP1505303 A1 EP 1505303A1
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EP
European Patent Office
Prior art keywords
machine set
clock frequency
frequency
change
noise level
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.)
Granted
Application number
EP04018592A
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German (de)
French (fr)
Other versions
EP1505303B1 (en
Inventor
Franz-Josef Ernst
Heinz Gassen
Janusz Olejnik
Uwe Schierhorn
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.)
Carrier Kaeltetechnik Deutschland GmbH
Original Assignee
Linde Kaeltetechnik GmbH
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Publication of EP1505303A1 publication Critical patent/EP1505303A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0027—Pulsation and noise damping means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/20—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by changing the driving speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0066—Control, e.g. regulation, of pumps, pumping installations or systems by changing the speed, e.g. of the driving engine
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0052—Noise reduction
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/20—Time, e.g. elapsed operating time
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/34—Change machine operation from normal operational mode into special mode, e.g. service mode, resin regeneration mode, sterilizing mode, steam mode, odour eliminating mode or special cleaning mode to clean the hydraulic circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/12—Sound
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/021—Inverters therefor

Definitions

  • the invention relates to a method for reducing noise on a Machine set comprising at least one frequency converter.
  • machine set below all known arrangements of compressors, pumps, fans and similar aggregates, which at least a frequency converter is assigned to understand. In particular, they are among them Variable speed compressor sets and variable speed condenser and Recooler, as used in refrigeration and air conditioning systems, to understand.
  • the clock frequency of To change or increase frequency for example, 2 or 4 kHz to 12 or 15 kHz. This causes a motor generated by a motor Noise level can be lowered.
  • the permissible current of the frequency inverter is limited or reduced. This happens to prevent excessive thermal load on the engine components.
  • Object of the present invention is to provide a generic method for Reduction of noise on a machine set to indicate the opposite has the known state of the art advantages.
  • the inventive method is first determined whether the by the machine set caused a pre-set or presettable noise level exceeds.
  • the presence of persons in the (immediate) Environment of the machine set selected As sensors come here For example, IR sensors, stepless proximity switches or conventional Motion detector used.
  • the clock frequency of or Frequency converter changed again, preferably the original again Clock frequency is set.
  • the clock frequency is not a preset and / or Preset value raised.
  • a minimum life which can not be exceeded may, be defined, with a summation of the already completed terms each reflects the current state of life.
  • Process is a continuous and / or discontinuous change of Clock frequency feasible.
  • the clock frequency is preferably flowing or in a demarcated Range - ie between a set or adjustable minimum and Maximum value - changed.
  • the inventive method allows disturbing noises at least always avoid if a preset or presettable Noise level is exceeded and / or at least one person is the Machine set approaching.
  • the parameter lifetime of the respective Machine set or its aggregates such as compressors, condensers, etc. considered.
  • the inventive method also allows the realization of Machine sets with conventional compressors, condensers or recoolers can work. So there are no, especially adapted to higher clock frequencies Aggregates, such as special motors, as known from the prior art are known required. Furthermore, it is now no longer necessary Components or units of a machine set on the actual required level to dimension out.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)
  • Control Of Multiple Motors (AREA)
  • Paper (AREA)
  • Control Of Positive-Displacement Air Blowers (AREA)

Abstract

The noise reduction process is for a machine set with at least one frequency inverter. Sensors are used to report the noise level produced by the machine set. The sensors report the presence of people in the vicinity of the machine set. A check is made for a change of the parameters of the machine set. If there has been such a change, and a certain sound level has been exceeded, the timing frequency of the frequency inverter is altered.

Description

Die Erfindung betrifft ein Verfahren zur Reduzierung von Geräuschen an einem Maschinensatz, der wenigstens einen Frequenzumrichter aufweist.The invention relates to a method for reducing noise on a Machine set comprising at least one frequency converter.

Unter dem Begriff "Maschinensatz" seien nachfolgend alle bekannten Anordnungen von Verdichtern, Pumpen, Ventilatoren und ähnlichen Aggregaten, denen wenigstens ein Frequenzumrichter zugeordnet ist, zu verstehen. Insbesondere seien darunter drehzahlgeregelte Verdichtersätze sowie drehzahlgeregelte Verflüssiger und Rückkühler, wie sie in Kälte- und Klimaanlagen zur Anwendung kommen, zu verstehen.The term "machine set" below all known arrangements of compressors, pumps, fans and similar aggregates, which at least a frequency converter is assigned to understand. In particular, they are among them Variable speed compressor sets and variable speed condenser and Recooler, as used in refrigeration and air conditioning systems, to understand.

Bei derartigen Maschinensätzen entstehen oftmals störende Geräusche, weil beispielsweise gepulste Spannungen von im Pulsweitenverfahren arbeitenden Frequenzumrichtern die Blechpakete der nachgeschalteten bzw. zugeordneten Motoren zur Resonanz anregen. Durch diese Geräusche werden beispielsweise die Anwohner von Supermärkten immer dann belästigt, wenn die lüfterbetriebenen Rückkühler und Verflüssiger - wie dies der Regelfall ist - außen an bzw. auf den Dächern der Supermärkte angeordnet sind. Aber auch das Personal derartiger Supermärkte, das in der unmittelbaren Umgebung von Maschinensätzen tätig ist, wird durch die von ihnen ausgehenden Geräusche belästigt.With such sets of machines disturbing noises often arise, because For example, pulsed voltages of working in the pulse width method Frequency inverters, the laminated cores of the downstream or associated Stimulate motors to resonance. These sounds, for example, the Residents of supermarkets always bothered when the fan-driven Recooler and condenser - as is the rule - outside on or on the Roofs of supermarkets are arranged. But also the staff of such Supermarkets, which operates in the immediate vicinity of machine sets, will harassed by the noise emanating from them.

Es wurde bereits vorgeschlagen, in derartigen Fällen die Taktfrequenz der Frequenzumrichter zu verändern bzw. zu erhöhen, also beispielsweise von 2 bzw. 4 kHz auf 12 bzw. 15 kHz. Dies führt dazu, dass ein von einem Motor erzeugte Geräuschpegel gesenkt werden kann. Mit der Erhöhung der Taktfrequenz muss jedoch der zulässige Strom der Frequenzumrichter begrenzt bzw. verkleinert werden. Dies geschieht, um einer zu hohen thermischen Belastung der Motorbauteile vorzubeugen.It has already been proposed in such cases, the clock frequency of To change or increase frequency, for example, 2 or 4 kHz to 12 or 15 kHz. This causes a motor generated by a motor Noise level can be lowered. However, with the increase of the clock frequency must the permissible current of the frequency inverter is limited or reduced. This happens to prevent excessive thermal load on the engine components.

Ferner haben höhere Taktfrequenzen den Nachteil, dass die Lebensdauer der Motorwicklungen sinkt; aus diesen Gründen gehen einige Hersteller von Motoren zu entsprechend teuren Speziallösungen im Hinblick auf die Drahtqualität und -isolierung der Wicklungen über. Furthermore, higher clock frequencies have the disadvantage that the life of the Motor windings drops; For these reasons, some manufacturers of motors are increasing correspondingly expensive special solutions with regard to wire quality and insulation the windings over.

Aufgabe der vorliegenden Erfindung ist es, ein gattungsgemäßes Verfahren zur Reduzierung von Geräuschen an einem Maschinensatz anzugeben, das gegenüber dem bekannten Stand der Technik Vorteile aufweist.Object of the present invention is to provide a generic method for Reduction of noise on a machine set to indicate the opposite has the known state of the art advantages.

Zur Lösung dieser Aufgabe wird ein gattungsgemäßes Verfahren vorgeschlagen, das dadurch gekennzeichnet ist, dass

  • mittels entsprechender Sensoren der durch den Maschinensatz verursachte Geräuschpegel ermittelt und/oder
  • mittels entsprechender Sensoren die Anwesenheit von Personen in der Umgebung des Maschinensatzes ermittelt wird,
  • geprüft wird, ob eine Änderung der Parameter des Maschinensatzes vorgenommen werden kann, und,
  • falls dies bejaht wird und ein voreingestellter Geräuschpegel überschritten und/oder die Anwesenheit wenigstens einer Person detektiert wird, eine Änderung der Taktfrequenz des oder der Frequenzumrichter vorgenommen wird.
To solve this problem, a generic method is proposed, which is characterized in that
  • determined by means of appropriate sensors caused by the machine set noise level and / or
  • the presence of persons in the vicinity of the machine set is determined by means of appropriate sensors,
  • it is checked whether a change of the parameters of the machine set can be made, and
  • if this is in the affirmative and a preset noise level is exceeded and / or the presence of at least one person is detected, a change in the clock frequency of the frequency converter (s) is made.

Entsprechend dem erfindungsgemäßen Verfahren wird zunächst ermittelt, ob der durch den Maschinensatz verursachte Geräuschpegel einen voreingestellten bzw. voreinstellbaren Geräuschpegel überschreitet. Alternativ oder zusätzlich wird mittels entsprechender Sensoren die Anwesenheit von Personen in der (unmittelbaren) Umgebung des Maschinensatzes selektiert. Als Sensoren kommen hierbei beispielsweise IR-Sensoren, stufenlose Näherungsschalter oder herkömmliche Bewegungsmelder zum Einsatz.According to the inventive method is first determined whether the by the machine set caused a pre-set or presettable noise level exceeds. Alternatively or additionally, by means of corresponding sensors the presence of persons in the (immediate) Environment of the machine set selected. As sensors come here For example, IR sensors, stepless proximity switches or conventional Motion detector used.

Des Weiteren wird geprüft, ob überhaupt eine Änderung der Parameter des Maschinensatzes vorgenommen werden kann. Dieser Verfahrensschritt ist erforderlich, da unter bestimmten Betriebsbedingungen eine Änderung der Parameter des Maschinensatzes unter Umständen nicht möglich ist, da der Maschinensatz ansonsten bestimmte Vorgaben nicht mehr einhalten bzw. erfüllen könnte. Eine derartige Situation kann beispielsweise dann auftreten, wenn der Maschinensatz einer Kälte- oder Klimaanlage gerade die maximal mögliche Leistung zur Verfügung stellen muss und der Betriebsstrom bereits sein Maximum erreicht hat. It also checks whether there is any change in the parameters of the Machine set can be made. This step is necessary because under certain operating conditions a change in the parameters of the Machine set may not be possible because the machine set otherwise certain specifications could no longer be respected or fulfilled. Such a situation can occur, for example, when the machine set a cold or Air conditioning just needs to provide the maximum possible performance and the operating current has already reached its maximum.

Wurde nun festgestellt, dass der durch den Maschinensatz verursachte Geräuschpegel über einem voreingestellten Geräuschpegel liegt und/oder sich eine Person in der Umgebung des Maschinensatzes aufhält und darüber hinaus eine Änderung der Parameter des Maschinensatzes vorgenommen werden kann, so wird erfindungsgemäß nunmehr eine Änderung der Taktfrequenz des oder der Frequenzumrichter vorgenommen. Durch dies Änderung der Taktfrequenz des oder der Frequenzumrichter wird erreicht, dass das störende Geräusch verringert und damit die Belästigung von Personen verringert wird.It has now been found that the noise level caused by the machine set is above a preset noise level and / or a person is in the Environment of the machine set and beyond a change in the Parameter of the machine set can be made so will According to the invention now a change in the clock frequency of or Frequency converter made. By changing the clock frequency of or the frequency converter is achieved that reduces the disturbing noise and thus the harassment of persons is reduced.

Das erfindungsgemäße Verfahren weiterbildend wird vorgeschlagen, dass dann, wenn der voreingestellte Geräuschpegel wieder unterschritten und/oder die Anwesenheit wenigstens einer Person nicht mehr festgestellt wird, die Taktfrequenz des oder der Frequenzumrichter wieder verändert, vorzugsweise wieder die ursprüngliche Taktfrequenz eingestellt wird.Further developing the method according to the invention, it is proposed that if the pre-set noise level falls below again and / or the presence At least one person is no longer detected, the clock frequency of or Frequency converter changed again, preferably the original again Clock frequency is set.

Mittels dieser Ausgestaltung des erfindungsgemäßen Verfahrens wird sichergestellt, dass die Änderung der Taktfrequenz nur so lange aufrechterhalten wird, wie dies unbedingt erforderlich ist. Verlässt also beispielsweise eine Person, die sich in der Umgebung des Maschinensatzes aufgehalten hat, dessen Umgebung, so kann die Taktfrequenz des oder der Frequenzumrichter wieder entsprechend verändert werden.By means of this embodiment of the method according to the invention, it is ensured that the change in the clock frequency is maintained only as long as this absolutely necessary. For example, leave a person who is in the Environment of the machine set has stopped, its environment, so can the Clock frequency of the frequency converter or be changed again accordingly.

Entsprechend einer weiteren vorteilhaften Ausgestaltung des erfindungsgemäßen Verfahrens wird die Taktfrequenz nicht über einen voreingestellten und/oder voreinstellbaren Wert angehoben.According to a further advantageous embodiment of the invention Method, the clock frequency is not a preset and / or Preset value raised.

Wie bereits erwähnt, können zu hohe Taktfrequenzen dazu führen, dass die Lebensdauern der dem bzw. den Frequenzumrichtern zugeordneten Maschinen verringert wird. Es ist daher ggf. eine Wichtung von Geräuschreduzierung und Lebensdauer vorzunehmen. Hierbei handelt es sich um eine unscharfe Regelung zu deren Verarbeitung eine sog. Fuzzy-Logik-Funktion erforderlich ist.As mentioned above, too high clock frequencies can cause the Lifes of the or the frequency converter associated machines is reduced. It is therefore possibly a weighting of noise reduction and To make life. This is a fuzzy scheme too whose processing requires a so-called fuzzy logic function.

Auch kann beispielsweise eine Mindestlebensdauer, die nicht unterschritten werden darf, definiert werden, wobei eine Aufsummierung der bereits geleisteten Laufzeiten jeweils den aktuellen Stand der Lebensdauer wiedergibt. Also, for example, a minimum life, which can not be exceeded may, be defined, with a summation of the already completed terms each reflects the current state of life.

Entsprechend einer weiteren vorteilhaften Ausgestaltung des erfindungsgemäßen Verfahrens ist eine kontinuierliche und/oder diskontinuierliche Änderung der Taktfrequenz realisierbar.According to a further advantageous embodiment of the invention Process is a continuous and / or discontinuous change of Clock frequency feasible.

Ferner wird die Taktfrequenz vorzugsweise fließend oder in einem abgegrenzten Bereich - also zwischen einem eingestellten oder einstellbaren Minimal- und Maximalwert - verändert.Furthermore, the clock frequency is preferably flowing or in a demarcated Range - ie between a set or adjustable minimum and Maximum value - changed.

Neben den vorgenannten Parametem können weitere Parameter, wie beispielsweise die Tonhaltigkeit des störenden Geräusches, die Tageszeit, zu der das störende Geräusch auftritt, die Taktfrequenz des Bauteiles bzw. Aggregates, das das störende Geräusch verursacht, etc. berücksichtigt werden.In addition to the aforementioned Parametem other parameters, such as the tonal quality of the disturbing noise, the time of day, to which the disturbing Sound occurs, the clock frequency of the component or aggregate, the disturbing Noise caused, etc. are taken into account.

Das erfindungsgemäße Verfahren ermöglicht es, störende Geräusche zumindest immer dann zu vermeiden, wenn ein voreingestellter bzw. voreinstellbarer Geräuschpegel überschritten wird und/oder wenigstens eine Person sich dem Maschinensatz nähert. Gleichzeitig wird der Parameter Lebensdauer des jeweiligen Maschinensatzes bzw. seiner Aggregate, wie Verdichter, Verflüssiger, etc. berücksichtigt.The inventive method allows disturbing noises at least always avoid if a preset or presettable Noise level is exceeded and / or at least one person is the Machine set approaching. At the same time, the parameter lifetime of the respective Machine set or its aggregates, such as compressors, condensers, etc. considered.

Das erfindungsgemäße Verfahren ermöglicht ferner die Realisierung von Maschinensätzen, die mit herkömmlichen Verdichtem, Verflüssigern bzw. Rückkühlern arbeiten können. Es sind also keine, speziell an höhere Taktfrequenzen angepassten Aggregate, wie beispielsweise spezielle Motoren, wie sie aus dem Stand der Technik bekannt sind, erforderlich. Des Weiteren ist nunmehr auch nicht mehr erforderlich, Bauteile bzw. Aggregate eines Maschinensatzes über das eigentlich erforderliche Maß hinaus zu dimensionieren.The inventive method also allows the realization of Machine sets with conventional compressors, condensers or recoolers can work. So there are no, especially adapted to higher clock frequencies Aggregates, such as special motors, as known from the prior art are known required. Furthermore, it is now no longer necessary Components or units of a machine set on the actual required level to dimension out.

Claims (6)

Verfahren zur Reduzierung von Geräuschen an einem Maschinensatz, der wenigstens einen Frequenzumrichter aufweist, dadurch gekennzeichnet, dass mittels entsprechender Sensoren der durch den Maschinensatz verursachte Geräuschpegel ermittelt und/oder mittels entsprechender Sensoren die Anwesenheit von Personen in der Umgebung des Maschinensatzes ermittelt wird, geprüft wird, ob eine Änderung der Parameter des Maschinensatzes vorgenommen werden kann, und, falls dies bejaht wird und ein voreingestellter Geräuschpegel überschritten und/oder die Anwesenheit wenigstens einer Person detektiert wird, eine Änderung der Taktfrequenz des oder der Frequenzumrichter vorgenommen wird. Method for reducing noise on a machine set having at least one frequency converter, characterized in that determined by means of appropriate sensors caused by the machine set noise level and / or the presence of persons in the vicinity of the machine set is determined by means of appropriate sensors, it is checked whether a change of the parameters of the machine set can be made, and if this is in the affirmative and a preset noise level is exceeded and / or the presence of at least one person is detected, a change in the clock frequency of the frequency converter (s) is made. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass dann, wenn der voreingestellte Geräuschpegel wieder unterschritten und/oder die Anwesenheit wenigstens einer Person nicht mehr festgestellt wird, die Taktfrequenz des oder der Frequenzumrichter wieder verändert, vorzugsweise wieder die ursprüngliche Taktfrequenz eingestellt wird.A method according to claim 1, characterized in that when the preset noise level falls below again and / or the presence of at least one person is no longer detected, the clock frequency of the frequency or the inverter again changed, preferably the original clock frequency is set again. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Sensoren, die die Anwesenheit von Personen erfassen, als IR-Sensor, als stufenlose Näherungsschalter, als Bewegungsmelder o. ä. ausgebildet sind.A method according to claim 1 or 2, characterized in that the sensors which detect the presence of persons, as IR sensor, as a continuous proximity switch, as a motion detector o. Ä. Are formed. Verfahren nach einem der vorhergehenden Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Taktfrequenz nicht über einen voreingestellten und/oder voreinstellbaren Wert angehoben wird.Method according to one of the preceding claims 1 to 3, characterized in that the clock frequency is not raised above a preset and / or presettable value. Verfahren nach einem der vorhergehenden Ansprüche 1 bis 4, dadurch gekennzeichnet, dass bei der Veränderung der Taktfrequenz auch der Parameter Lebensdauer der dem oder den Frequenzumrichtern zugeordneten Maschinen berücksichtigt wird. Method according to one of the preceding claims 1 to 4, characterized in that when changing the clock frequency and the parameter life of the one or more frequency converter associated machines is taken into account. Verfahren nach einem der vorhergehenden Ansprüche 1 bis 5, dadurch gekennzeichnet, dass eine kontinuierliche und/oder diskontinuierliche Änderung der Taktfrequenz realisierbar ist.Method according to one of the preceding claims 1 to 5, characterized in that a continuous and / or discontinuous change of the clock frequency can be realized.
EP04018592A 2003-08-08 2004-08-05 Procedure for noise reduction for a machine group Active EP1505303B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10336498 2003-08-08
DE10336498A DE10336498A1 (en) 2003-08-08 2003-08-08 Method for reducing the noise of a machine set

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EP1505303A1 true EP1505303A1 (en) 2005-02-09
EP1505303B1 EP1505303B1 (en) 2006-10-11

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AT (1) ATE342447T1 (en)
DE (2) DE10336498A1 (en)
ES (1) ES2274359T3 (en)

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DE102008040920A1 (en) * 2008-08-01 2010-02-04 Robert Bosch Gmbh Method for controlling electric motor by pulse-width modulated control signals, involves generating control pulse with target-duty cycle and temporally varying pulse width and pulse spacing
EP2195912A1 (en) * 2007-09-24 2010-06-16 Robert Bosch GmbH Method and device for controlling an electric motor
CN102996419A (en) * 2011-09-14 2013-03-27 泰州乐金电子冷机有限公司 Compressor control device and compressor control method thereof
WO2020252549A1 (en) * 2019-06-17 2020-12-24 Embraco Indústria De Compressores E Soluções Em Refrigeração Ltda. System and method for operational acoustic optimization of a variable speed compressor and refrigerator

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DE102021118448A1 (en) 2021-07-16 2023-01-19 Bayerische Motoren Werke Aktiengesellschaft Control unit for reducing the operating noise of an electric refrigerant compressor

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EP1887443A1 (en) * 2006-08-10 2008-02-13 Electrolux Home Products Corporation N.V. Home appliance with ambience detector and ambience dependent operation
EP2278421A3 (en) * 2006-08-10 2011-03-23 Electrolux Home Products Corporation N.V. Home appliance with ambience detector and ambience dependent operation
EP2278423A3 (en) * 2006-08-10 2011-04-20 Electrolux Home Products Corporation N.V. Home appliance with ambience detector and ambience dependent operation
EP2278422A3 (en) * 2006-08-10 2011-04-20 Electrolux Home Products Corporation N.V. Home appliance with ambience detector and ambience dependent operation
EP2195912A1 (en) * 2007-09-24 2010-06-16 Robert Bosch GmbH Method and device for controlling an electric motor
US10097121B2 (en) 2007-09-24 2018-10-09 Robert Bosch Gmbh Method and device for controlling an electric motor
DE102008040920A1 (en) * 2008-08-01 2010-02-04 Robert Bosch Gmbh Method for controlling electric motor by pulse-width modulated control signals, involves generating control pulse with target-duty cycle and temporally varying pulse width and pulse spacing
CN102996419A (en) * 2011-09-14 2013-03-27 泰州乐金电子冷机有限公司 Compressor control device and compressor control method thereof
WO2020252549A1 (en) * 2019-06-17 2020-12-24 Embraco Indústria De Compressores E Soluções Em Refrigeração Ltda. System and method for operational acoustic optimization of a variable speed compressor and refrigerator
US11959681B2 (en) 2019-06-17 2024-04-16 Nidec Global Appliance Brasil Ltda. System and method for operational acoustic optimization of a variable speed compressor and refrigerator

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ES2274359T3 (en) 2007-05-16
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DE502004001709D1 (en) 2006-11-23
EP1505303B1 (en) 2006-10-11

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