EP0604481A1 - Resistance a grande puissance refroidie par liquide. - Google Patents

Resistance a grande puissance refroidie par liquide.

Info

Publication number
EP0604481A1
EP0604481A1 EP92918785A EP92918785A EP0604481A1 EP 0604481 A1 EP0604481 A1 EP 0604481A1 EP 92918785 A EP92918785 A EP 92918785A EP 92918785 A EP92918785 A EP 92918785A EP 0604481 A1 EP0604481 A1 EP 0604481A1
Authority
EP
European Patent Office
Prior art keywords
liquid
resistance element
load resistor
resistance
chamber
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
EP92918785A
Other languages
German (de)
English (en)
Other versions
EP0604481B1 (fr
Inventor
Alfred Bochtler
Rolf Neubert
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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Publication of EP0604481A1 publication Critical patent/EP0604481A1/fr
Application granted granted Critical
Publication of EP0604481B1 publication Critical patent/EP0604481B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/08—Cooling, heating or ventilating arrangements
    • H01C1/082—Cooling, heating or ventilating arrangements using forced fluid flow
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C3/00—Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven or formed as grids
    • H01C3/02—Non-adjustable metal resistors made of wire or ribbon, e.g. coiled, woven or formed as grids arranged or constructed for reducing self-induction, capacitance or variation with frequency

Definitions

  • the invention relates to a liquid-cooled high-load resistor. 5
  • a liquid-cooled power resistor is known from EP 0 066 902 B1.
  • This liquid-cooled power resistor consists of a cylindrical housing, which is provided with two splashes.
  • the 10 housing is closed at the front with an upper cover plate and a lower cover plate. •
  • the flanges are formed in rectangular parallelepiped shape, so that their edges project beyond the cylinder and for connection to the Deckplat ⁇ th serve by means of fastening screws.
  • 15 sene housing is provided with two connections for deionized water, with an inlet hole in the lower connection and an outlet hole in the upper connection. Four panels are attached to the inside of the housing. You alternately leave left
  • the panels 20 and right a flow cross-section free and serve to deflect the deionized water. They are provided with holes through which a resistance conductor is guided like a serpentine. Thus, the panels are also used as holders for the resistance conductor
  • the upper and lower cover plates are each provided with a connecting pin and fixed by means of a nut.
  • the resistance conductor is connected to these connecting pins.
  • this liquid-cooled power resistor still has a high inductance.
  • its resistance value is relatively high, for example 10 ⁇ . to 10 ⁇ l.
  • a liquid-cooled contra which consists of a hollow body and a resistance carrier arranged in its interior.
  • This resistance carrier is wound with resistance wire.
  • the hollow body and the resistance body consist of insulating material and are spaced apart from one another by an intermediate space forming a cooling channel. Which is connected to a coolant inflow at the lower end of the hollow body and to a coolant outflow at the upper end of the hollow body.
  • the resistance carrier consists of a rod-shaped body with radially arranged arms on which the resistance wire is wound bidirectionally. The ends of the resistance wire are each connected to an electrical connection.
  • Such a liquid-cooled resistor has a low inductance and can dissipate a high power loss.
  • it is disadvantageous that such resistors have a low insulating strength and the cooling liquid must not be electrically conductive. Due to the use of a thin wire as a resistance conductor, the resistance value of such a liquid-cooled resistor is very large.
  • the invention is based on the object of specifying a liquid-cooled high-load resistor which can dissipate a high power loss in a small space, is low-inductance and has a very low resistance value.
  • This object is achieved in that the chamber consists of two insulating plates and an insulating ring and that a bifilar wound conductor strip spiral is provided as a resistance element, which is stretched between the two insulating plates in such a way that the cooling liquid flows through a rectangular channel.
  • the resistance element By arranging the resistance element directly in the cooling liquid, as a result of which the cooling liquid flows along both sides of the current-carrying resistance element, a high power loss can be dissipated to the cooling liquid.
  • the resistance element By designing the resistance element as a bifilar wound conductor strip spiral, the resulting inductance of the high-load resistor is kept to a minimum, with a flat strip being selected as the resistance material, which, owing to the geometry, has a low self-inductance compared to a round conductor.
  • the conductor strip of the resistance element is provided with an insulating layer. Ceramic material with which the conductor strip is coated can be provided as the insulating layer. It is therefore also possible to use conductive cooling liquid, for example service water, as the cooling liquid. Oil can also be used as a coolant. If the conductor strip of the resistance element is not insulated, deionized water is used as the cooling liquid.
  • the resistance element is mechanically fixed by means of knobs on at least one insulating plate.
  • These knobs are made of electrically non-conductive material, for example plastic. This simplifies the Assembly of the individual parts to form a high-load resistor and the resistance spiral has a uniform slope along the resistance flat strip, whereby a channel formed along the flat strip has a uniform cross section.
  • Another embodiment of the mechanical fixing of the resistance element is a bifilar groove in an insulating plate of the high-load resistor.
  • an insulating plate and an insulating ring of this high-load resistor form one design. This considerably simplifies the assembly, because the resistance element is first installed in the chamber of the high-load resistor and in a subsequent operation, this pre-assembled high-load resistor can be closed in a liquid-tight manner by means of the second insulating plate. By using one unit, only one sealing ring is used.
  • the space requirement for such a high-load resistor is small.
  • the resistance value can be adjusted by changing the length, width or thickness of the conductor strip material.
  • the variation of the conductor strip thickness is expedient for an existing construction of the housing.
  • the power loss to be dissipated is determined with the amount of liquid flowing through per unit of time.
  • the high-load resistor according to the invention Possibility to flow around the conductor tape spiral once or twice.
  • the coolant flows from the inlet to the center of the high-load resistor - turning point of the bifilar wound conductor coil - and back to the outlet.
  • a further inlet and outlet are arranged in the turning area of the bifilarly wound conductor tape spiral. This creates two parallel cooling channels that can be flowed through in the same direction or in opposite directions with cooling liquid.
  • twice the amount of cooling fluid can flow through this high-load resistor per unit of time, as a result of which the power loss that is given off to the coolant is doubled without changing the space requirement of the high-load resistor.
  • Figure 1 shows a plan view of the high-load resistor according to the invention
  • Figure 2 illustrates a sectional view II-II of Figure 1, in Figure 3, the resistance element is shown in more detail
  • Figure 4 shows an embodiment of the electrical
  • FIG. 5 shows a further sectional view in-iii according to FIG. 1
  • FIG. 6 shows a further sectional view IV-iv according to FIG.
  • FIG. 1 shows a top view of the liquid-cooled high-load resistor according to the invention.
  • This load resistor consists of a housing 2 and a resistance element 4, which is shown in more detail in FIG. For better understanding, the associated sectional illustration II-II, shown in FIG. 2, is also described.
  • the housing 2 of the high-load resistor consists of a chamber 6, in which the resistance element 4 is arranged, and a cover 8.
  • an insulating plate is provided, which is detachably closed with the chamber 6 by means of a circumferential sealing ring 10 in a liquid-tight manner .
  • the cover 8 can also not be detachably connected to the chamber 6.
  • the chamber 6 consists of an insulating plate 12 and an insulating ring 14. The corners of the
  • Insulating rings 14 are designed as flanges or fastening flags 16.
  • the insulating plate 12, which forms the bottom of the chamber 6, is likewise closed in a liquid-tight manner by means of a circumferential sealing ring.
  • the insulating ring 14 and the insulating plate 12 form a structural unit.
  • Knobs 18 made of electrically non-conductive material are provided for mechanically fixing the resistance element 4 on the insulating plate 12. These knobs 18 are alternately inserted on both sides along imaginary radial lines on the insulating plate 12. Deflection pins 20 and 22 are arranged in the interior of the resistance element 4 and are shown in FIG. 6 below.
  • the electrical connections 24 and 26 of the resistance element 4 are arranged in the edge region of the chamber 6. Also in the edge region of the chamber 6, an inlet 28 and an outlet 30 for the coolant are arranged in the insulating plate 8. As shown in FIG. 2, the resistance element 4 is clamped in the chamber 6 by means of the insulating plate 8 and the releasable fastening elements in such a way that the cooling liquid flows through a rectangular channel 32.
  • a bifilar wound conductor strip spiral 34 is provided as the resistance element 4, which is provided with an electrical connection 24 and 26 at its free ends.
  • a stainless steel strip with the following dimensions 0.5x10x4,000 mm 3 can be provided as the resistance material.
  • the deflection pins 20 and 22 are arranged eccentrically to the center point 40 of the chamber 6 of the high-load resistor. The distance from the center 36 to the center 40 is marked with a and the distance from the center 38 to the center 36 is marked with b. The bending radii of the conductor strip of the resistance element 4 can be determined by means of these distances.
  • a further inlet or a further outlet can be arranged in the center 36, in addition to the deflecting pin 20, a further inlet or a further outlet can be arranged and in the center 38, in addition to the deflecting pin 22, a further outlet or a further inlet can be arranged.
  • the bifilar wound conductor strip spiral 34 and the centrally arranged deflection pins 20 and 22 result in a spiral channel 32 through which the coolant always flows in the opposite direction relative to a partition (conductor strip). These two flow directions are marked by broken arrows.
  • the single-channel design of the liquid-cooled high-load resistor is converted into a two-channel embodiment.
  • the coolant By placing the Inlet 28, the outlet 30, the further inlet and the further outlet, the coolant can flow in the two channels in the same direction or in the opposite direction.
  • the flow rate of the cooling liquid can be doubled through the second channel, as a result of which the dissipated power loss also doubles.
  • the conductor current is supplied and discharged at the electrical connections 24 and 26, the individual spiral paths are flowed through in the opposite direction by the current, as a result of which the resulting inductance of this resistance element 4 is minimal.
  • the resistance material has the shape of a flat strip (FIG. 4), which, owing to the geometry, has a lower self-inductance than a round conductor.
  • the electrical connection 24 or 26, of which only the connection 26 is shown in FIG. 4, consists of a web 42 which is arranged on a disk 44.
  • a threaded bolt 46 is attached to the side of the disk 44 facing away from the web 42.
  • the free end of the conductor strip spiral 34 is electrically conductively connected to the web 42.
  • an end face 48 of the web 42 terminates with the insulating ring 14 (chamber wall) and a web side 50 directed towards the entrance of the cooling channel 32 is chamfered so that the cooling liquid can enter and exit as swirl-free as possible.
  • FIG. 5 shows a further sectional illustration III-in according to FIG. 1.
  • This sectional view III-III shows an electrical connection 24 on one side and the inlet 28 arranged in the insulating plate 8 on the other hand.
  • the electrical connection 24 consists of the previously described parts of web 42, washer 44 and threaded bolt 46 (FIG. 4) and a connecting conductor 52, which is electrically conductively connected to the threaded bolt 46 by means of a nut 54 and a washer 56.
  • the inlet 28 consists of a socket 58 which is anchored in the insulating plate 8 in a liquid-tight manner by means of a seal 60.
  • a coolant hose 62 of a cooling system (not shown in more detail) is plugged onto the nozzle 58.
  • the cooling liquid flows through the hose 62 and the nozzle 58 into the entrance of the cooling channel 32, the opening of which lies in the sectional plane. This means that the coolant emerges vertically from the drawing plane.
  • FIG. 6 shows a further sectional view IV-IV according to FIG. 1 in more detail.
  • This illustration shows the deflecting pins 20 and 22 in the middle of the chamber 6 of the high-load resistor.
  • These deflecting pins 20 and 22 each also serve as receptacles for a releasable fastening means 64, with which the bifilar wound conductor strip spiral 34 is also pressed in the chamber 6 in the center of the high-load resistance.
  • this resistor has a resistance value of only 0.8.2. with a load capacity of 5 kW at a flow rate of 3 1 / min for the single-channel version.
  • the two-channel embodiment has a load capacity of 10 kW with a flow rate of 6 1 / min.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Details Of Resistors (AREA)
  • Transformer Cooling (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Thermistors And Varistors (AREA)
  • Glass Compositions (AREA)

Abstract

La présente invention se rapporte à une résistance à haute puissance refroidie par liquide, constituée d'un boîtier (2) et d'un élément de résistance (4), l'élément de résistance (4) étant disposé à l'intérieur d'une chambre (6) traversée par un liquide de refroidissement allant de l'entrée vers la sortie (28, 30). Selon l'invention, la chambre (6) est constituée de deux plaques isolantes (8, 12) et d'une bague isolante (14), et l'élément de résistance (4) est une spirale en ruban conducteur (34) enroulée de manière bifilaire, laquelle est prise entre les deux plaques isolantes (8, 12) de telle manière que le liquide de refroidissement passe dans un canal de section rectangulaire (32). De cette manière on obtient une résistance à haute puissance refroidie par liquide, laquelle peut supporter, dans un espace restreint, des dissipations de puissance élevées, présente une faible inductance et une valeur de résistance très basse.
EP92918785A 1991-09-19 1992-09-08 Resistance a grande puissance refroidie par liquide Expired - Lifetime EP0604481B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE9111719U 1991-09-19
DE9111719U DE9111719U1 (de) 1991-09-19 1991-09-19 Flüssigkeitsgekühlter Hochlastwiderstand
PCT/DE1992/000762 WO1993006605A1 (fr) 1991-09-19 1992-09-08 Resistance a grande puissance refroidie par liquide

Publications (2)

Publication Number Publication Date
EP0604481A1 true EP0604481A1 (fr) 1994-07-06
EP0604481B1 EP0604481B1 (fr) 1995-08-16

Family

ID=6871459

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92918785A Expired - Lifetime EP0604481B1 (fr) 1991-09-19 1992-09-08 Resistance a grande puissance refroidie par liquide

Country Status (6)

Country Link
US (1) US5508677A (fr)
EP (1) EP0604481B1 (fr)
AT (1) ATE126624T1 (fr)
CA (1) CA2119366C (fr)
DE (2) DE9111719U1 (fr)
WO (1) WO1993006605A1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9111719U1 (de) * 1991-09-19 1991-11-07 Siemens AG, 8000 München Flüssigkeitsgekühlter Hochlastwiderstand
DE9203354U1 (de) * 1992-03-12 1992-04-30 Siemens AG, 80333 München Flüssigkeitsgekühlter Hochlastwiderstand
DE9409441U1 (de) * 1994-06-10 1994-08-04 Siemens AG, 80333 München Flüssigkeitsgekühlter Hochlastwiderstand
US6452477B1 (en) * 2000-09-06 2002-09-17 Marconi Medical Systems, Inc. High voltage low inductance circuit protection resistor
US20090148657A1 (en) * 2007-12-05 2009-06-11 Jan Ihle Injection Molded PTC-Ceramics
US20090148802A1 (en) * 2007-12-05 2009-06-11 Jan Ihle Process for heating a fluid and an injection molded molding
US20090146042A1 (en) * 2007-12-05 2009-06-11 Jan Ihle Mold comprising a ptc-ceramic
US9034210B2 (en) * 2007-12-05 2015-05-19 Epcos Ag Feedstock and method for preparing the feedstock
US20090145977A1 (en) * 2007-12-05 2009-06-11 Jan Ihle Injection molded nozzle and injector comprising the injection molded nozzle
EP2897137B1 (fr) * 2014-01-16 2020-04-29 Vishay MCB Industrie Résistance électrique compacte à forte puissance
US9514864B2 (en) * 2014-02-24 2016-12-06 Sandia Corporation Solid-state resistor for pulsed power machines
DE102018133195B4 (de) * 2018-12-20 2021-04-08 Auto-Kabel Management Gmbh Hochstromwiderstand sowie Schaltungsanordnung
CN109545486A (zh) * 2019-01-09 2019-03-29 深圳市正阳兴电子科技有限公司 一种斩波电阻器及载体装置
US11451156B2 (en) 2020-01-21 2022-09-20 Itt Manufacturing Enterprises Llc Overvoltage clamp for a matrix converter
US11394264B2 (en) 2020-01-21 2022-07-19 Itt Manufacturing Enterprises Llc Motor assembly for driving a pump or rotary device with a low inductance resistor for a matrix converter

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Publication number Priority date Publication date Assignee Title
DE410792C (de) * 1925-03-05 Oerlikon Maschf Kuehlvorrichtung fuer elektrisch erwaermte, gewellte Metallbaender
GB191124679A (en) * 1910-11-07 1912-10-31 William Le Roy Emmet Improvements in and relating to Water Cooled Resistances.
US2254838A (en) * 1938-09-08 1941-09-02 Rca Corp Resistor
US3156889A (en) * 1962-06-14 1964-11-10 Aerospace Corp Rheostat
US3858146A (en) * 1973-06-04 1974-12-31 B Simonsen Electrical discharge resistor
DE3133485A1 (de) * 1980-09-15 1982-05-06 Peter 2563 Ipsach Herren Fluessigkeitsgekuehlte elektrische baugruppe
DE3267531D1 (en) * 1981-05-21 1986-01-02 Bbc Brown Boveri & Cie Liquid-cooled power resistor and its application
DE3639239A1 (de) * 1986-11-17 1988-05-19 Siemens Ag Fluessigkeitsgekuehlter widerstand
DE9111719U1 (de) * 1991-09-19 1991-11-07 Siemens AG, 8000 München Flüssigkeitsgekühlter Hochlastwiderstand
DE9203354U1 (de) * 1992-03-12 1992-04-30 Siemens AG, 80333 München Flüssigkeitsgekühlter Hochlastwiderstand

Non-Patent Citations (1)

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Title
See references of WO9306605A1 *

Also Published As

Publication number Publication date
US5508677A (en) 1996-04-16
EP0604481B1 (fr) 1995-08-16
WO1993006605A1 (fr) 1993-04-01
CA2119366C (fr) 1997-06-17
CA2119366A1 (fr) 1993-04-01
ATE126624T1 (de) 1995-09-15
DE9111719U1 (de) 1991-11-07
DE59203311D1 (de) 1995-09-21

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