DE20308901U1 - Braking resistance for electric motors, consists of resistance wire enclosed by radially compressed insulating material in metal tube embedded in insulating material filling metal housing - Google Patents
Braking resistance for electric motors, consists of resistance wire enclosed by radially compressed insulating material in metal tube embedded in insulating material filling metal housingInfo
- Publication number
- DE20308901U1 DE20308901U1 DE20308901U DE20308901U DE20308901U1 DE 20308901 U1 DE20308901 U1 DE 20308901U1 DE 20308901 U DE20308901 U DE 20308901U DE 20308901 U DE20308901 U DE 20308901U DE 20308901 U1 DE20308901 U1 DE 20308901U1
- Authority
- DE
- Germany
- Prior art keywords
- insulating material
- housing
- resistance
- metal tube
- resistance wire
- 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.)
- Expired - Lifetime
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 19
- 239000002184 metal Substances 0.000 title claims abstract description 19
- 239000011810 insulating material Substances 0.000 title claims abstract description 11
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 229910044991 metal oxide Inorganic materials 0.000 claims description 2
- 150000004706 metal oxides Chemical class 0.000 claims description 2
- 244000309464 bull Species 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/02—Housing; Enclosing; Embedding; Filling the housing or enclosure
- H01C1/028—Housing; Enclosing; Embedding; Filling the housing or enclosure the resistive element being embedded in insulation with outer enclosing sheath
-
- 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
- H01C3/06—Flexible or folding resistors, whereby such a resistor can be looped or collapsed upon itself
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/0094—Structural association with other electrical or electronic devices
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Details Of Resistors (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
Description
Anmelder-Nr.: 1522213Applicant No.: 1522213
Bezeichnung: Bremswiderstand für ElektromotorenDesignation: Braking resistor for electric motors
Die Erfindung betrifft einen elektrischen Widerstand zur Umwandlung elektrischer Energie in Wärme beim Abbremsen von Elektromotoren durch Umschalten von Motorbetrieb auf Generatorbetrieb.The invention relates to an electrical resistor for converting electrical energy into heat when braking electric motors by switching from motor operation to generator operation.
An die Regelbarkeit und Steuerbarkeit von Elektromotoren, die für Spezialantriebe eingesetzt werden, werden zunehmend höhere Ansprüche gestellt. Die Drehzahl ist mit Frequenzumformern nach Bedarf regelbar. Häufig besteht aber auch die Notwendigkeit, so eingesetzte Motoren sehr schnell, d.h. innerhalb kürzester Zeit, von einer hohen Arbeitsdrehzahl auf die Drehzahl Null abzubremsen. Dazu werden die Motoren vom normalen Motorbetrieb auf Generatorbetrieb umgeschaltet und abgebremst. Die dabei entstehende elektrische Energie muß schnell abgeführt werden, was durch ihre Umwandlung in Wärme mittels Bremswider-Increasingly higher demands are being placed on the controllability and controllability of electric motors used for special drives. The speed can be controlled as required using frequency converters. However, it is often necessary to brake motors used in this way very quickly, i.e. within a very short time, from a high working speed to zero speed. To do this, the motors are switched from normal motor operation to generator operation and braked. The electrical energy generated in this process must be dissipated quickly, which is achieved by converting it into heat using braking resistors.
Neymeyer & Partner GbR, PatentanwälteNeymeyer & Partner GbR, patent attorneys
• »8052 Villingen-Schwenningen (DE) &Ggr; ; *· Ne - 05. Juni 2003• »8052 Villingen-Schwenningen (DE) &Ggr;; *· Ne - 05. June 2003
ständen erfolgt. Diese sollen bei möglichst kleiner Bauweise hohe Wärmemengen schnell aufnehmen können und zudem hochspannungsfest sein.These should be able to absorb large amounts of heat quickly while being as small as possible and should also be high-voltage resistant.
Der Erfindung liegt die Aufgabe zugrunde, einen elektrischen Wiederstand der eingangs genannten Art zu schaffen, der bei kompakter und einfacher Bauweise sowie einer Hochspannungsfestigkeit von wenigstens 4000 V in der Lage ist, schnell hohe Wärmemengen aufzunehmen und wieder abzugeben .The invention is based on the object of creating an electrical resistor of the type mentioned at the beginning, which is capable of quickly absorbing and releasing large amounts of heat while having a compact and simple design and a high voltage strength of at least 4000 V.
Gelöst wird diese Aufgabe erfindungsgemäß dadurch, daß der Widerstand aus einem Widerstandsdraht besteht, der in einem Metallrohr von einer durch radiales Verpressen hochverdichteten Isolierstoffmasse umschlossen ist und daß das Metallrohr selbst innerhalb eines aus einem Metall mit einer hohen spezifischen Wärmekapazität bestehenden Gehäuse in eine das Gehäuse ausfüllende Isoliermasse eingebettet ist.This object is achieved according to the invention in that the resistor consists of a resistance wire which is enclosed in a metal tube by an insulating material mass which is highly compressed by radial pressing and in that the metal tube itself is embedded within a housing consisting of a metal with a high specific heat capacity in an insulating mass which fills the housing.
Ein so ausgebildeter Bremswiderstand erfüllt in vorzüglicher Weise alle an ihn gestellten Anforderungen, die sich aus der vorgenannten Aufgabe ergeben.A braking resistor designed in this way perfectly fulfils all the requirements placed on it by the aforementioned task.
Neymeyer & PARTNER GbR, Patentanwälte ; JJ.. J JJ., J J8052 k'illingen-Schwenningen (DE)Neymeyer & PARTNER GbR, patent attorneys ; JJ.. J JJ., J J8052 k'illingen-Schwenningen (DE)
. .: .: :: :·: ;. ? Ne-05.Juni2003. .: .: :: :·: ;. ? Ne-June 05, 2003
Abgesehen davon, daß schon durch die Verwendung geeigneter
Isolierstoffe als Isolierstoffmasse bzw. als Isoliermasse, die das Gehäuse ausfüllt, eine hohe Wärmekapazität bei minimaler Baugröße erreicht werden kann, wird dieser
Vorteil noch durch die Ausgestaltung gemäß Anspruch 2 erhöht, da Aluminium unter den für diesen Zweck in Frage
kommenden Metallen die höchste spezifische Wärmekapazität aufweist.Apart from the fact that the use of suitable
Insulating materials as insulating material mass or as insulating mass that fills the housing, a high heat capacity can be achieved with minimal size, this
The advantage is further increased by the embodiment according to claim 2, since aluminium is one of the materials in question for this purpose.
has the highest specific heat capacity of all metals.
Durch die Ausgestaltung nach Anspruch 3 kann in bekannter Weise eine erhöhte Wärmeabgabe an die Umgebung und somit
eine schnellere Abkühlung erzielt werden.The design according to claim 3 can, in a known manner, result in increased heat emission to the environment and thus
faster cooling can be achieved.
Besondere herstellungstechnische Vorteile werden durch
die Ausgestaltung nach Anspruch 4 erzielt.Special manufacturing advantages are achieved by
the embodiment according to claim 4 is achieved.
Die Verwendung von MgO oder SiO2 als Isoliermasse gemäß
Anspruch 5 erhöht nicht nur die Wärmekapazität, sondern
gewährleistet auf Grund der guten Wärmeleitfähigkeit dieser Isoliermassen eine schnelle Wärmeableitung vom Widerstandsdraht zum Aluminiumgehäuse.The use of MgO or SiO 2 as insulating material according to
Claim 5 not only increases the heat capacity, but
Due to the good thermal conductivity of these insulating materials, rapid heat dissipation from the resistance wire to the aluminum housing is ensured.
Neymeyer & Partner GbR, Patentanwälte , ««·· I JJ., J J8052 Cillingen-Schwenningen (DE)Neymeyer & Partner GbR, patent attorneys, ««·· I JJ., J J8052 Cillingen-Schwenningen (DE)
' * Ne - 05. Juni 2003' * Ne - 05 June 2003
Mit dem gemäß Anspruch 6 vorgesehenen Thermoschalter kann eine Überlastung des Widerstands vermieden werden.With the thermal switch provided according to claim 6, an overload of the resistor can be avoided.
Die gemäß Anspruch 7 vorgesehene Wendelform des Widerstandsdrahtes kann zur Verminderung der Baugröße beitragen. The spiral shape of the resistance wire provided according to claim 7 can contribute to reducing the size.
Anhand der Zeichnung wird die Erfindung im folgenden näher erläutert. Es zeigt:The invention is explained in more detail below with reference to the drawing. It shows:
Fig. 1 einen Längsschnitt durch einen elektrischen Bremswiderstand;Fig. 1 shows a longitudinal section through an electrical braking resistor;
Fig. 2 einen Schnitt II-II aus Fig. 1;Fig. 2 shows a section II-II of Fig. 1;
Fig. 3 in vergrößerter Darstellung im Querschnitt eine als Wendel ausgebildeten Widerstandsdraht in einem Metallrohr;Fig. 3 shows an enlarged cross-section of a resistance wire designed as a spiral in a metal tube;
Fig. 4 einen gerade verlaufenden Widerstandsdraht in einem Metallrohr.Fig. 4 a straight resistance wire in a metal tube.
Der Bremswiderstand besteht aus einem Widerstandsdraht 1, der gemäß Fig. 4 als gerader Draht oder gemäß Fig. 3 alsThe braking resistor consists of a resistance wire 1, which can be a straight wire as shown in Fig. 4 or a
Neymeyer & Partner GbR, PatentanwälteNeymeyer & Partner GbR, patent attorneys
• · ♦• · ♦
• <78O55Villingen-Schwenningen (DE)• <78O55Villingen-Schwenningen (DE)
• ·.": Ne-05.• ·.": Ne-05.
Wendel ausgebildet, konzentrisch mit radialem Abstand in einem Metallrohr 2 in eine durch radiales Verpressen hochverdichtete Isolierstoffmasse 3 eingebettet ist. Dieses Metallrohr besteht vorzugsweise aus dünnwandigem Edelstahl.Spiral-shaped, embedded concentrically with radial spacing in a metal tube 2 in an insulating material mass 3 that is highly compressed by radial pressing. This metal tube is preferably made of thin-walled stainless steel.
Die so gebildete Widerstandseinheit 4 bzw. das Metallrohr 2 selbst ist meanderförmig verlaufend innerhalb eines, vorzugsweise aus Aluminium bestehenden Gehäuses 5, in eine dieses Gehäuse 5 ausfüllende Isoliermasse 6 eingebettet. Diese Isoliermasse 6 besteht ebenfalls aus MgO oder SiO2, also aus einem Metalloxyd, das eine relativ gute Wärmeleitfähigkeit und auch eine relativ hohe spezifische Wärmekapazität aufweist.The resistance unit 4 formed in this way or the metal tube 2 itself is embedded in a meandering shape within a housing 5, preferably made of aluminum, in an insulating compound 6 that fills this housing 5. This insulating compound 6 also consists of MgO or SiO 2 , i.e. of a metal oxide that has a relatively good thermal conductivity and also a relatively high specific heat capacity.
Auch Aluminium als Gehäusewerkstoff weist unter den für einen solchen Zweck in Frage kommenden Metallen die höchste spezifische Wärmekapazität auf, jedenfalls eine höhere spezifische Wärmekapazität als beispielsweise Kupfer, Messing oder Eisen bzw. Stahl.Aluminium as a housing material also has the highest specific heat capacity among the metals that can be used for such a purpose, at least a higher specific heat capacity than, for example, copper, brass or iron or steel.
Herstellungsmäßig von Vorteil ist es, das Gehäuse 5 aus einem stranggepressten Rohrprofil herzustellen, das, wie Fig. 2 zeigt, vorzugsweise eine rechteckige Querschnittsform aufweist und zumindest auf einer Seite mit einer Anzahl von Kühlrippen 7 versehen ist.From a manufacturing point of view, it is advantageous to produce the housing 5 from an extruded tubular profile which, as shown in Fig. 2, preferably has a rectangular cross-sectional shape and is provided with a number of cooling fins 7 on at least one side.
Neymeyer & Partner GbR, PatentanwälteNeymeyer & Partner GbR, patent attorneys
·- eT-·- eT-
• * * J"805i l'illingen-Schwenningen (DE) .'· Ne - 05. Juni 2003• * * J"805i l'illingen-Schwenningen (DE) .'· Ne - 05. June 2003
Selbstverständlich können auch andere Querschnittsformen, beispielsweise eine zylindrische Querschnittsform mit radialen Kühlrippen oder eine halbkreisförmige Querschnittsform gewählt werden, wenn dies für den besonderen Anwendungsfall von Vorteil sein kann.Of course, other cross-sectional shapes, for example a cylindrical cross-sectional shape with radial cooling fins or a semicircular cross-sectional shape, can also be selected if this can be advantageous for the particular application.
Die jeweils aus den mit Verschlußstopfen 8 versehenen Enden des Metallrohres 2 herausgeführten Enden 9 und 10 des Widerstandsdrahtes 1 sind an Anschlußdrähte oder -litzen 11 bzw. 12 angelötet oder angeschweißt, die durch eine Öffnung 13 einer stirnseitigen Abschlußplatte 14 des Gehäuses 5 nach außen geführt sind.The ends 9 and 10 of the resistance wire 1, which respectively lead out of the ends of the metal tube 2 provided with sealing plugs 8, are soldered or welded to connecting wires or strands 11 or 12, which are led outwards through an opening 13 of a front end plate 14 of the housing 5.
Auch das gegenüberliegende Ende des Gehäuses 5 ist mit einer Abschlußplatte 15 verschlossen, die jedoch keine Durchlaßöffnungen aufzuweisen braucht.The opposite end of the housing 5 is also closed with an end plate 15, which, however, does not need to have any through openings.
Aus Sicherheitsgründen ist es zweckmäßig, in die Isoliermasse 6 des Gehäuses 5 einen Thermoschalter 16 einzubetten, dessen Anschlußdrähte 17 und 18 durch eine weitere Öffnung 19 der Abschlußplatte 14 nach außen geführt sind, um an eine Motorsteuerung angeschlossen zu werden.For safety reasons, it is expedient to embed a thermal switch 16 in the insulating compound 6 of the housing 5, the connecting wires 17 and 18 of which are led out through a further opening 19 in the end plate 14 in order to be connected to a motor control system.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE20308901U DE20308901U1 (en) | 2003-06-06 | 2003-06-06 | Braking resistance for electric motors, consists of resistance wire enclosed by radially compressed insulating material in metal tube embedded in insulating material filling metal housing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE20308901U DE20308901U1 (en) | 2003-06-06 | 2003-06-06 | Braking resistance for electric motors, consists of resistance wire enclosed by radially compressed insulating material in metal tube embedded in insulating material filling metal housing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE20308901U1 true DE20308901U1 (en) | 2003-08-14 |
Family
ID=27763254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE20308901U Expired - Lifetime DE20308901U1 (en) | 2003-06-06 | 2003-06-06 | Braking resistance for electric motors, consists of resistance wire enclosed by radially compressed insulating material in metal tube embedded in insulating material filling metal housing |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE20308901U1 (en) |
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1711035A1 (en) | 2005-04-08 | 2006-10-11 | DBK David + Baader GmbH | Electric brake resistance and method for producing the same |
| DE202007014360U1 (en) * | 2007-10-12 | 2009-02-26 | Türk & Hillinger GmbH | Aluminum heating resistor |
| EP2200170A1 (en) * | 2008-12-19 | 2010-06-23 | OpenHydro IP Limited | A system for braking and isolation of a hydroelectric turbine generator |
| US8308422B2 (en) | 2006-07-14 | 2012-11-13 | Openhydro Group Limited | Submerged hydroelectric turbines having buoyancy chambers |
| DE202005022043U1 (en) | 2005-04-08 | 2012-12-05 | Dbk David + Baader Gmbh | Electric braking resistor |
| US8466595B2 (en) | 2006-07-14 | 2013-06-18 | Openhydro Group Limited | Hydroelectric turbine |
| US8596964B2 (en) | 2006-07-14 | 2013-12-03 | Openhydro Group Limited | Turbines having a debris release chute |
| US8690526B2 (en) | 2008-12-18 | 2014-04-08 | Openhydro Ip Limited | Hydroelectric turbine with passive braking |
| US8754540B2 (en) | 2008-02-05 | 2014-06-17 | James Ives | Hydroelectric turbine with floating rotor |
| US8784005B2 (en) | 2008-04-17 | 2014-07-22 | Openhydro Group Limited | Turbine installation method |
| US8864439B2 (en) | 2006-07-14 | 2014-10-21 | Openhydro Ip Limited | Tidal flow hydroelectric turbine |
| US8872371B2 (en) | 2009-04-17 | 2014-10-28 | OpenHydro IP Liminted | Enhanced method of controlling the output of a hydroelectric turbine generator |
| US8933598B2 (en) | 2009-09-29 | 2015-01-13 | Openhydro Ip Limited | Hydroelectric turbine with coil cooling |
| US9054512B2 (en) | 2008-12-19 | 2015-06-09 | Openhydro Ip Limited | Method of installing a hydroelectric turbine generator |
| CN105047336A (en) * | 2015-07-15 | 2015-11-11 | 北京东方计量测试研究所 | Oil-filled ac-dc difference calculable resistor |
| US9236725B2 (en) | 2009-09-29 | 2016-01-12 | Openhydro Ip Limited | Hydroelectric turbine cabling system |
| US9234492B2 (en) | 2010-12-23 | 2016-01-12 | Openhydro Ip Limited | Hydroelectric turbine testing method |
| US9284709B2 (en) | 2007-04-11 | 2016-03-15 | Openhydro Group Limited | Method of installing a hydroelectric turbine |
| EP1902944B1 (en) | 2006-09-20 | 2016-04-13 | Schniewindt GmbH & Co. KG | Ship propulsion |
| US9473046B2 (en) | 2009-09-29 | 2016-10-18 | Openhydro Ip Limited | Electrical power conversion system and method |
| US9765647B2 (en) | 2010-11-09 | 2017-09-19 | Openhydro Ip Limited | Hydroelectric turbine recovery system and a method therefor |
| WO2020083620A1 (en) * | 2018-10-25 | 2020-04-30 | Siemens Mobility GmbH | Braking resistor for an electrically driven vehicle |
| US10854360B2 (en) | 2017-06-20 | 2020-12-01 | Vishay Electronic Gmbh | Power resistor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3233923A1 (en) | 1982-09-13 | 1984-03-15 | BBC Aktiengesellschaft Brown, Boveri & Cie., 5401 Baden, Aargau | Method for rheostatic braking of traction vehicles and circuit arrangement for carrying out the method |
| DE3447570C1 (en) | 1984-12-21 | 1986-08-21 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Method for the mains-independent resistant braking of an asynchronous machine which is supplied via a bridge circuit which can be turned off |
| DE3703689A1 (en) | 1987-02-06 | 1988-08-18 | Magnet Motor Gmbh | Electrical resistance unit for use in a fire damp protection region |
| DE8904401U1 (en) | 1989-04-08 | 1990-08-02 | Robert Bosch Gmbh, 70469 Stuttgart | Glow plug |
| AT402123B (en) | 1991-06-26 | 1997-02-25 | Siemens Ag Oesterreich | Pulsed-load resistance having a heat sink |
| DE19754932A1 (en) | 1997-12-11 | 1999-06-24 | Voith Turbo Kg | Electric braking resistor assembly for electric drive systems |
-
2003
- 2003-06-06 DE DE20308901U patent/DE20308901U1/en not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3233923A1 (en) | 1982-09-13 | 1984-03-15 | BBC Aktiengesellschaft Brown, Boveri & Cie., 5401 Baden, Aargau | Method for rheostatic braking of traction vehicles and circuit arrangement for carrying out the method |
| DE3447570C1 (en) | 1984-12-21 | 1986-08-21 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Method for the mains-independent resistant braking of an asynchronous machine which is supplied via a bridge circuit which can be turned off |
| DE3703689A1 (en) | 1987-02-06 | 1988-08-18 | Magnet Motor Gmbh | Electrical resistance unit for use in a fire damp protection region |
| DE8904401U1 (en) | 1989-04-08 | 1990-08-02 | Robert Bosch Gmbh, 70469 Stuttgart | Glow plug |
| AT402123B (en) | 1991-06-26 | 1997-02-25 | Siemens Ag Oesterreich | Pulsed-load resistance having a heat sink |
| DE19754932A1 (en) | 1997-12-11 | 1999-06-24 | Voith Turbo Kg | Electric braking resistor assembly for electric drive systems |
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1711035A1 (en) | 2005-04-08 | 2006-10-11 | DBK David + Baader GmbH | Electric brake resistance and method for producing the same |
| DE202005022043U1 (en) | 2005-04-08 | 2012-12-05 | Dbk David + Baader Gmbh | Electric braking resistor |
| US8596964B2 (en) | 2006-07-14 | 2013-12-03 | Openhydro Group Limited | Turbines having a debris release chute |
| US8864439B2 (en) | 2006-07-14 | 2014-10-21 | Openhydro Ip Limited | Tidal flow hydroelectric turbine |
| US8308422B2 (en) | 2006-07-14 | 2012-11-13 | Openhydro Group Limited | Submerged hydroelectric turbines having buoyancy chambers |
| US8466595B2 (en) | 2006-07-14 | 2013-06-18 | Openhydro Group Limited | Hydroelectric turbine |
| EP1902944B1 (en) | 2006-09-20 | 2016-04-13 | Schniewindt GmbH & Co. KG | Ship propulsion |
| US9284709B2 (en) | 2007-04-11 | 2016-03-15 | Openhydro Group Limited | Method of installing a hydroelectric turbine |
| DE202007014360U1 (en) * | 2007-10-12 | 2009-02-26 | Türk & Hillinger GmbH | Aluminum heating resistor |
| US8754540B2 (en) | 2008-02-05 | 2014-06-17 | James Ives | Hydroelectric turbine with floating rotor |
| US8784005B2 (en) | 2008-04-17 | 2014-07-22 | Openhydro Group Limited | Turbine installation method |
| US8690526B2 (en) | 2008-12-18 | 2014-04-08 | Openhydro Ip Limited | Hydroelectric turbine with passive braking |
| EP2200170A1 (en) * | 2008-12-19 | 2010-06-23 | OpenHydro IP Limited | A system for braking and isolation of a hydroelectric turbine generator |
| US9054512B2 (en) | 2008-12-19 | 2015-06-09 | Openhydro Ip Limited | Method of installing a hydroelectric turbine generator |
| US8872371B2 (en) | 2009-04-17 | 2014-10-28 | OpenHydro IP Liminted | Enhanced method of controlling the output of a hydroelectric turbine generator |
| US9236725B2 (en) | 2009-09-29 | 2016-01-12 | Openhydro Ip Limited | Hydroelectric turbine cabling system |
| US8933598B2 (en) | 2009-09-29 | 2015-01-13 | Openhydro Ip Limited | Hydroelectric turbine with coil cooling |
| US9473046B2 (en) | 2009-09-29 | 2016-10-18 | Openhydro Ip Limited | Electrical power conversion system and method |
| US9765647B2 (en) | 2010-11-09 | 2017-09-19 | Openhydro Ip Limited | Hydroelectric turbine recovery system and a method therefor |
| US9234492B2 (en) | 2010-12-23 | 2016-01-12 | Openhydro Ip Limited | Hydroelectric turbine testing method |
| CN105047336A (en) * | 2015-07-15 | 2015-11-11 | 北京东方计量测试研究所 | Oil-filled ac-dc difference calculable resistor |
| US10854360B2 (en) | 2017-06-20 | 2020-12-01 | Vishay Electronic Gmbh | Power resistor |
| WO2020083620A1 (en) * | 2018-10-25 | 2020-04-30 | Siemens Mobility GmbH | Braking resistor for an electrically driven vehicle |
| RU208396U1 (en) * | 2018-10-25 | 2021-12-16 | Сименс Мобилити Гмбх | BRAKE RHEOSTAT UNIT |
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