WO2002057570A1 - Elektronischer frequenzumformer mit einem kühlkreislauf - Google Patents
Elektronischer frequenzumformer mit einem kühlkreislauf Download PDFInfo
- Publication number
- WO2002057570A1 WO2002057570A1 PCT/EP2002/000224 EP0200224W WO02057570A1 WO 2002057570 A1 WO2002057570 A1 WO 2002057570A1 EP 0200224 W EP0200224 W EP 0200224W WO 02057570 A1 WO02057570 A1 WO 02057570A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- housing
- converter
- frequency converter
- vibrator
- frequency
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/06—Solidifying concrete, e.g. by application of vacuum before hardening
- E04G21/08—Internal vibrators, e.g. needle vibrators
Definitions
- the invention relates to an electronic frequency converter according to the preamble of claim 1, which is used with a high-frequency internal vibrator for compacting concrete.
- vibrations in the form of high-frequency vibrations are introduced into the fresh concrete beds by vibrators.
- the most frequently used vibrators on construction sites are the so-called internal vibrators or internal vibrators.
- an internal vibrator for compacting concrete which is operated with a high-frequency electric motor.
- a frequency converter is combined with an actuating switch of the electric motor to form a miniaturized unit and housed in a switch housing.
- additional frequency converters can be dispensed with in comparison to conventional high-frequency internal vibrators, as a result of which the handling of this internal vibrator is considerably simplified for an operator.
- the radius of use of the internal vibrator is improved as a result of the reduced dimensions of the switch housing and the associated decrease in weight.
- the dimensions of the switch housing cannot always be completely small.
- ner building electronic frequency converter can be adapted because a sufficiently large dissipation of heat, which is generated during operation of the frequency converter, must be ensured by means of convection over the surface of the switch housing.
- a further downsizing of the switch housing would have the disadvantage that insufficient heat dissipation to the surroundings is guaranteed and the frequency converter can therefore fail as a result of thermal overload.
- the invention is based on the object of specifying an electronic frequency converter which can be operated in a thermally stable manner and thus can be used without interference in practical operation.
- An electronic frequency converter according to the invention for a high-frequency internal vibrator for compacting concrete is characterized by a cooling circuit with a cooling medium contained therein, and a first heat exchanger integrated into the cooling circuit for transmission heat generated in the converter housing to the cooling medium and by a second heat exchanger integrated in the cooling circuit for transferring heat absorbed by the cooling medium to the outside.
- the cooling circuit and the first and second heat exchangers integrated therein bring about very good cooling of the frequency converter by efficiently dissipating heat from the converter housing to the outside, so that the frequency converter is protected against failure due to heat build-up in the converter housing.
- Conventional heat dissipation via convection is superimposed by heat transfer to the cooling medium and a subsequent heat dissipation to the outside, so that, compared to known frequency converters without a cooling circuit, it is possible to reduce the size of a surface of the converter housing without impairing the operational reliability of the frequency converter.
- a further downsizing of the converter housing and, associated therewith, improved handling of the frequency converter when used in practice can thus be achieved.
- the first heat exchanger is arranged on or on the converter housing.
- the first heat exchanger is assigned to heat-generating components of the frequency converter, which are accommodated in the converter housing, in such a way that heat generated by these components can be transferred to the cooling medium through the first heat exchanger.
- the second heat exchanger is provided separately from the converter housing in order to transmit heat absorbed by the cooling medium to the outside.
- a particularly advantageous embodiment of the invention is characterized in that the aforementioned part of the cooling circuit, the z. B. can be carried out in the form of pipes, is formed within the converter housing.
- This part of the cooling circuit is therefore very well shielded from external influences, which can occur, for example, in the form of impacts.
- it can also be accommodated in the converter housing. It is possible to either arrange the first heat exchanger in the vicinity of the heat-generating components, or alternatively to attach it directly to these heat-generating components.
- the electronic frequency converter can be made very robust by integrating the first heat exchanger and part of the cooling circuit within the converter housing.
- the cooling medium used together with the cooling circuit can consist of a cooling liquid or alternatively a cooling gas.
- the cooling medium is circulated in the cooling circuit by a pump, a throughput of the pump being adapted accordingly to the dimensions of the first and second heat exchangers.
- the converter housing is combined with the pump to form a structural unit. It is particularly advantageous that the pump is integrated in the converter housing in order to be protected from external influences.
- a hand switch for actuating the electronic frequency converter is integrated in the converter housing.
- the frequency converter can be switched on or off directly on the converter housing in a simple manner.
- the electronic frequency converter can be operated with alternating current.
- the frequency converter can be connected directly to the luminous flux network with, for example, 230 V and 50 Hz via a normal plug.
- a particularly advantageous embodiment of the invention provides a high-frequency internal vibrator for compacting concrete, which has a vibrator housing, in which an unbalanced mass and an electric motor operating at a higher frequency than the mains for driving the unbalanced mass, a frequency converter accommodated in a converter housing for feeding of the electric motor and a protective tube connecting the vibrator housing and the converter housing and is characterized in that the frequency converter is an electronic frequency converter according to the invention.
- a further part of the cooling circuit of the frequency converter is formed in the protective hose and in the vibrator housing, the second heat exchanger being arranged within the vibrator housing.
- the cooling medium circulated by the pump flows through the second heat exchanger, as a result of which the heat absorbed by the cooling medium is transferred to the vibrator housing.
- a further particularly advantageous embodiment of the high-frequency internal vibrator is characterized by a detection device, by means of which a change in a motor current supplied to the electric motor can be detected, and by a temperature protection switching device that can be controlled by the detection device, for switching the pump on and off.
- the vibrator housing is not continuously immersed in the concrete to be compacted, but is optionally pulled out of the concrete briefly so that it can be immersed again at another point. If, during operation, the vibrator housing is not inside the concrete, but instead hangs freely in the air, very high temperatures develop immediately in the vibrator housing, whereby the motor current supplied to the electric motor decreases.
- the pump can be switched off by the temperature protection switching device when the motor current is detected by the detection device.
- the resulting interruption of the circulation of the cooling medium prevents the heat generated by the electric motor in the vibrator housing and in this case transferred to the cooling medium via the second heat exchanger as a result of the circulation of the cooling medium being transported back to the first heat exchanger, which is disadvantageous additional heating of the frequency converter, which at that time was not very stressed, would result.
- the pump can be switched on by the temperature protection switching device in the event of an increase in the motor current detected by the detection device, so that an advantageous heat transfer from the vibrator housing to the cool concrete can take place.
- FIG. 1 shows a basic structure of a high-frequency internal vibrator with an electronic frequency converter according to the invention.
- the electronic frequency converter 1 shown in the figure has a converter housing 2 and a first heat exchanger 3, which is arranged inside the converter housing 2 in the vicinity of heat-generating components (not shown) of the frequency converter 1.
- the first heat exchanger 3 can be attached to a wall of the converter housing 2, for example by means of a holder. Alternatively, the first heat exchanger 3 can be attached directly to the heat-generating components.
- the arrangement in the interior of the converter housing 2 means that the first heat exchanger 3 is very well protected against damaging external influences, which cannot be excluded when used on a construction site.
- the frequency converter 1 according to the invention also has a cooling circuit 4, in which the first heat exchanger 3 is integrated.
- the cooling circuit 4 is a
- Contain cooling medium (not shown), which is a cooling liquid or a cooling gas.
- the heat-generating components th of the frequency converter 1 generated heat transferred to the cooling medium.
- the frequency converter 1 also has a pump 5, which is combined with the converter housing 2 to form a structural unit.
- the pump 5 is accommodated in the converter housing 2 in the same way as the first heat exchanger 3 for protection against external damage.
- the above-mentioned cooling circuit 4 is formed by a pipe or hose system, a part of the cooling circuit 4 running inside the converter housing 2.
- the pipes which are generally sensitive to impacts, are effectively protected against damage.
- the pump 5 is connected to the cooling circuit 4 in such a way that the cooling medium can be circulated by it in the cooling circuit 4.
- the frequency converter 1 is part of a high-frequency internal vibrator, which also has a vibrator housing 6 and a protective tube 7.
- an unbalanced mass and an electric motor (not shown) for driving the unbalanced mass are arranged in a known manner.
- the electric motor is supplied with a voltage by the frequency converter 1, the frequency of which is preferably in the range of 200 Hz and thus above the usual mains frequency of 50 Hz.
- One end of the protective hose 7 is connected to the vibrator housing 6, while another end of the protective hose 7 is attached to the converter housing 2 via a coupling device 8.
- the protective tube 7 is flexible in terms of ease of handling, and its outer diameter is dimensioned such that it can be easily gripped by an operator, so that it can also serve as an operating tube.
- the protective tube 7 in a variant of the frequency converter 1 according to the invention can be removed in a simple manner from the vibrating housing 6 or via the coupling device 8 from the converter housing 2.
- a power supply cable 9 with a plug 10 is led out on one side of the converter housing 2.
- the electronic frequency converter 1 can be supplied with conventional mains alternating current via the power supply cable 9 and the plug 10. driven, increasing the normal AC frequency from 50 Hz to values of up to 200 Hz.
- electrical lines (not shown) are received, which connect an output of the frequency converter 1 to the electric motor arranged in the vibrating housing 6. As a result, the electric motor can be supplied with a high-frequency voltage output by the frequency converter 1.
- the frequency converter 1 also has a second heat exchanger 11 integrated in the cooling circuit 4, which is arranged inside the vibrator housing 6. A part of the cooling circuit 4 runs inside the protective tube 7 and leads from the converter housing 2 to the second heat exchanger 11.
- the operation of the pump 5 ensures that the cooling medium contained in the cooling circuit 4 passes from the first heat exchanger 3 through the protective hose 7 to the second heat exchanger 11.
- the heat transferred to the cooling medium by the first heat exchanger 3 is now released to the vibrator housing 6 via the second heat exchanger 11.
- the cooling medium then circulates back through the protective tube 7 in the direction of the first heat exchanger 3.
- the vibrator housing 6 is immersed in the still fresh concrete 12 to be processed during operation. Since the concrete generally has a relatively low temperature in relation to the frequency converter 1, the heat transferred from the second heat exchanger 11 to the vibrator housing 6 can then be efficiently conducted away to the cooling concrete 12.
- the frequency converter 1 according to the invention explained above can be operated with great certainty in a thermally non-critical state over a long period of time.
- the external dimensions of the converter housing 2 can be further reduced without the frequency converter 1 malfunctioning or failing as a result of insufficient convection cooling of the converter housing 2.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003583078A JP3940123B2 (ja) | 2001-01-12 | 2002-01-11 | 冷却される電子式周波数変換器を有する高周波内部バイブレータ |
US10/250,960 US6960013B2 (en) | 2001-01-12 | 2002-01-11 | High frequency immersion vibrator comprising a cooled electronic frequency converter |
EP02719689A EP1349997B1 (de) | 2001-01-12 | 2002-01-11 | Hochfrequenz-innenrüttler mit gekühltem elektronischen frequenzumformer |
DE50213410T DE50213410D1 (de) | 2001-01-12 | 2002-01-11 | Hochfrequenz-innenrüttler mit gekühltem elektronischen frequenzumformer |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10101277A DE10101277B4 (de) | 2001-01-12 | 2001-01-12 | Hochfrequenz-Innenrüttler mit gekühltem elektronischen Frequenzumformer |
DE10101277.2 | 2001-01-12 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2002057570A1 true WO2002057570A1 (de) | 2002-07-25 |
WO2002057570A8 WO2002057570A8 (de) | 2002-09-06 |
Family
ID=7670407
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2002/000224 WO2002057570A1 (de) | 2001-01-12 | 2002-01-11 | Elektronischer frequenzumformer mit einem kühlkreislauf |
Country Status (6)
Country | Link |
---|---|
US (1) | US6960013B2 (de) |
EP (1) | EP1349997B1 (de) |
JP (1) | JP3940123B2 (de) |
DE (2) | DE10101277B4 (de) |
ES (1) | ES2322037T3 (de) |
WO (1) | WO2002057570A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6960013B2 (en) * | 2001-01-12 | 2005-11-01 | Wacker Construction Equipment Ag | High frequency immersion vibrator comprising a cooled electronic frequency converter |
CN114086245A (zh) * | 2021-11-23 | 2022-02-25 | 山东天岳先进科技股份有限公司 | 一种循环冷却系统及长晶炉 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10124145C1 (de) * | 2001-05-17 | 2002-08-14 | Wacker Werke Kg | Innenrüttler zum Verdichten von Beton |
JP2006183430A (ja) * | 2004-12-28 | 2006-07-13 | Nippon Oil Corp | コンクリートバイブレータ |
US20150200566A1 (en) * | 2014-01-10 | 2015-07-16 | Zippy Technology Corp. | Redundant power supply system for reducing standby power consumption |
CN111002430B (zh) * | 2019-12-20 | 2021-08-06 | 上海舟润实业有限公司 | 一种混凝土夯实设备 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE9217854U1 (de) | 1992-12-30 | 1993-03-04 | Wacker-Werke Gmbh & Co Kg, 8077 Reichertshofen, De | |
DE19815645C1 (de) * | 1998-04-07 | 1999-08-19 | Siemens Ag | Umrichteranordnung mit Kühleinrichtung |
DE19900348A1 (de) * | 1999-01-07 | 2000-07-13 | Irt Innovative Recycling Techn | Kompaktsteuerung für einen elektromotorischen Innenrüttler |
DE19913305A1 (de) * | 1999-03-24 | 2000-10-12 | Wacker Werke Kg | Innenrüttler mit Frequenzumformer |
Family Cites Families (24)
Publication number | Priority date | Publication date | Assignee | Title |
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US1989409A (en) * | 1932-05-24 | 1935-01-29 | Viber Company Ltd | Method and apparatus for compacting and dewatering cementitious materials |
CH578665A5 (en) * | 1974-08-26 | 1976-08-13 | Vlk Jaroslav | Integral vibrator for compacting freshly cast concrete - has tubular hermetically sealed housing with motor connected to eccentric |
DE2525592B2 (de) * | 1975-06-09 | 1977-07-28 | Innenvibrator zum verdichten von beton o.dgl. | |
US5202612A (en) * | 1988-01-29 | 1993-04-13 | Sinano Electric Co., Ltd. | Concrete vibrator |
JPH0751839B2 (ja) * | 1989-02-21 | 1995-06-05 | エクセン株式会社 | 可搬型壁打コンクリート打設装置 |
US5108189A (en) * | 1990-09-19 | 1992-04-28 | Fred Oswald | Vibrator and related method |
DE59204379D1 (de) * | 1991-08-14 | 1995-12-21 | Kaercher Gmbh & Co Alfred | Hochdruckreinigungsgerät. |
US5556199A (en) * | 1994-12-14 | 1996-09-17 | Oswald; Fred | Vibrator with covering and related method |
US5725304A (en) * | 1995-12-13 | 1998-03-10 | Makita Corporation | Battery concrete vibrator |
JPH09291703A (ja) * | 1996-04-26 | 1997-11-11 | Mikasa Sangyo Kk | コンクリート振動機 |
US6109111A (en) * | 1997-02-14 | 2000-08-29 | Racine Federated Inc. | Concrete vibrator monitor |
JP3296260B2 (ja) * | 1997-09-01 | 2002-06-24 | 三菱電機株式会社 | 高圧電気機器の水冷装置 |
EP0916785A1 (de) * | 1997-11-11 | 1999-05-19 | BOMAG GmbH | Vibrator zur Beton-Verdichtung |
DE19756250C2 (de) * | 1997-12-17 | 2000-11-02 | Siemens Ag | Selbstgeführter Stromrichter eines spannungseinprägenden Umrichters mit Hochleistungs-Modulen |
DE19815655C2 (de) | 1998-04-08 | 2002-04-11 | Eckart Doege | Antriebseinrichtung für eine Arbeitsmaschine |
CH689598A5 (de) * | 1998-06-09 | 1999-06-30 | Msz Motoren Service Ag Zuerich | Von einem Umformer gespeister Innenrüttler |
DE19831282A1 (de) * | 1998-07-13 | 2000-01-20 | Abb Daimler Benz Transp | Halbleiterkühlkörper-System und Verfahren zur Herstellung |
EP1048106A1 (de) * | 1998-10-16 | 2000-11-02 | Ilyas Tekin | Leistungstransformatorentwurf für elektronische umwandler |
DE19913450A1 (de) * | 1999-03-25 | 2000-09-28 | Mannesmann Sachs Ag | Leistungselektronik zum Steuern einer elektrischen Maschine |
DE29912206U1 (de) * | 1999-07-13 | 1999-10-07 | Gutgesell Karsten | Aktivkühler für Microprozessoren |
DE10033137A1 (de) * | 2000-07-07 | 2002-01-31 | Wacker Werke Kg | Frequenzumformer für einen Innenrüttler |
DE10101277B4 (de) * | 2001-01-12 | 2006-11-02 | Wacker Construction Equipment Ag | Hochfrequenz-Innenrüttler mit gekühltem elektronischen Frequenzumformer |
US6811297B2 (en) * | 2001-02-26 | 2004-11-02 | Fred Oswald | Vibrator having a core with soft sheath and apertures therethrough |
US20030111753A1 (en) * | 2001-12-13 | 2003-06-19 | Oztec Industries Inc. | Vibrator and related method |
-
2001
- 2001-01-12 DE DE10101277A patent/DE10101277B4/de not_active Expired - Fee Related
-
2002
- 2002-01-11 EP EP02719689A patent/EP1349997B1/de not_active Expired - Lifetime
- 2002-01-11 WO PCT/EP2002/000224 patent/WO2002057570A1/de active Application Filing
- 2002-01-11 US US10/250,960 patent/US6960013B2/en not_active Expired - Fee Related
- 2002-01-11 JP JP2003583078A patent/JP3940123B2/ja not_active Expired - Fee Related
- 2002-01-11 ES ES02719689T patent/ES2322037T3/es not_active Expired - Lifetime
- 2002-01-11 DE DE50213410T patent/DE50213410D1/de not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE9217854U1 (de) | 1992-12-30 | 1993-03-04 | Wacker-Werke Gmbh & Co Kg, 8077 Reichertshofen, De | |
DE19815645C1 (de) * | 1998-04-07 | 1999-08-19 | Siemens Ag | Umrichteranordnung mit Kühleinrichtung |
DE19900348A1 (de) * | 1999-01-07 | 2000-07-13 | Irt Innovative Recycling Techn | Kompaktsteuerung für einen elektromotorischen Innenrüttler |
DE19913305A1 (de) * | 1999-03-24 | 2000-10-12 | Wacker Werke Kg | Innenrüttler mit Frequenzumformer |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6960013B2 (en) * | 2001-01-12 | 2005-11-01 | Wacker Construction Equipment Ag | High frequency immersion vibrator comprising a cooled electronic frequency converter |
CN114086245A (zh) * | 2021-11-23 | 2022-02-25 | 山东天岳先进科技股份有限公司 | 一种循环冷却系统及长晶炉 |
CN114086245B (zh) * | 2021-11-23 | 2022-08-26 | 山东天岳先进科技股份有限公司 | 一种循环冷却系统及长晶炉 |
Also Published As
Publication number | Publication date |
---|---|
EP1349997B1 (de) | 2009-04-01 |
DE10101277A1 (de) | 2002-07-25 |
DE50213410D1 (de) | 2009-05-14 |
US20040061457A1 (en) | 2004-04-01 |
JP2005520077A (ja) | 2005-07-07 |
JP3940123B2 (ja) | 2007-07-04 |
DE10101277B4 (de) | 2006-11-02 |
WO2002057570A8 (de) | 2002-09-06 |
ES2322037T3 (es) | 2009-06-16 |
US6960013B2 (en) | 2005-11-01 |
EP1349997A1 (de) | 2003-10-08 |
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