US20150364978A1 - Electric Machine - Google Patents

Electric Machine Download PDF

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Publication number
US20150364978A1
US20150364978A1 US14/391,970 US201414391970A US2015364978A1 US 20150364978 A1 US20150364978 A1 US 20150364978A1 US 201414391970 A US201414391970 A US 201414391970A US 2015364978 A1 US2015364978 A1 US 2015364978A1
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United States
Prior art keywords
rotor
stator
electric machine
switching
machine according
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.)
Abandoned
Application number
US14/391,970
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English (en)
Inventor
Lachezar Lazarov Petkanchin
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.)
NRG TECH Ltd
Original Assignee
Nrg Tech Ltd
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 Nrg Tech Ltd filed Critical Nrg Tech Ltd
Priority claimed from PCT/EP2014/069035 external-priority patent/WO2015078603A1/fr
Assigned to NRG TECH LTD. reassignment NRG TECH LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: PETKANCHIN, LACHEZAR LAZAROV
Publication of US20150364978A1 publication Critical patent/US20150364978A1/en
Abandoned legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K17/00—Asynchronous induction motors; Asynchronous induction generators
    • H02K17/02—Asynchronous induction motors
    • H02K17/26—Asynchronous induction motors having rotors or stators designed to permit synchronous operation
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/22—Surface treatment of glass, not in the form of fibres or filaments, by coating with other inorganic material
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/02—Surface treatment of glass, not in the form of fibres or filaments, by coating with glass
    • C03C17/04—Surface treatment of glass, not in the form of fibres or filaments, by coating with glass by fritting glass powder
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B20/00—Processes specially adapted for the production of quartz or fused silica articles, not otherwise provided for
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/06—Glass compositions containing silica with more than 90% silica by weight, e.g. quartz
    • C—CHEMISTRY; METALLURGY
    • C30—CRYSTAL GROWTH
    • C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B15/00—Single-crystal growth by pulling from a melt, e.g. Czochralski method
    • C30B15/10—Crucibles or containers for supporting the melt
    • H02K11/001—
    • 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
    • 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
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K17/00—Asynchronous induction motors; Asynchronous induction generators
    • H02K17/02—Asynchronous induction motors
    • H02K17/22—Asynchronous induction motors having rotors with windings connected to slip-rings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/28—Layout of windings or of connections between windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • H02K5/225—Terminal boxes or connection arrangements
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2217/00—Coatings on glass
    • C03C2217/20—Materials for coating a single layer on glass
    • C03C2217/21—Oxides
    • C03C2217/213—SiO2
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2218/00—Methods for coating glass
    • C03C2218/10—Deposition methods
    • C03C2218/11—Deposition methods from solutions or suspensions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/92—Fire or heat protection feature
    • Y10S428/921—Fire or flameproofing

Definitions

  • This invention relates to an electric machine or generator or motor and to a method to operate an electric machine or generator or motor or AC generator.
  • an electric machine comprising a stator and a rotor, wherein the rotor is adapted to rotate relatively to the stator, and wherein the rotor comprises a rotor-switching device which is arranged at the rotor.
  • the rotor-switching device comprises a rotor-control-unit and at least one switch which is adapted to electrically connect rotor-coils and/or to provide or disconnect an electric connection to a power source.
  • the rotor-control-unit is adapted to activate preselected electrical switches at a predefined moment of time so that for a given rotor coil one of the following events occur:
  • the switches are mechanical switches such as relays or semiconductor switches.
  • the switches are adapted to electrically connect different rotor-coils.
  • the switches are also adapted to provide a connection to the power supply.
  • a number of switches is the same as the number of (rotor) coils.
  • the switches are located in or at the rotor-switching-device, they also rotate together with the rotor-switching-device.
  • the rotor comprises means to provide or conduct electric power, in particular a slip ring or a rotary transformer.
  • a slip ring is an electrical connector designed to carry current or signals from a stationary wire into a rotating device. Typically, it consists of a stationary graphite or metal contact (brush) which rubs on the outside diameter of a rotating metal ring. As the metal ring turns, the electrical current or signal is conducted through the stationary brush to the metal ring making the connection. Additional ring/brush assemblies are stacked along the rotating axis if more than one electrical circuit is needed. Either the brushes or the rings are stationary and the other component rotates.
  • a rotary (rotatory) transformer is a specialized transformer used to couple electrical signals between two parts that rotate in relation to each other.
  • typical rotary transformers provide longer life than slip rings.
  • the rotor comprises a plurality of slip rings or rotary transformers, dependent on the power supply or the current(s) and voltage(s) that have to be conducted.
  • these means are arranged at a rotor axis of the rotor.
  • the power source is an AC- or DC-power source.
  • the rotor-switching device may comprise at least one electric inverter, such as a DC-DC-inverter, a DC-AC-inverter, an AC-AC-inverter and/or an AC-DC-inverter.
  • a DC-DC-inverter such as a DC-DC-inverter, a DC-AC-inverter, an AC-AC-inverter and/or an AC-DC-inverter.
  • AC-DC-inverter such as a DC-DC-inverter, a DC-AC-inverter, an AC-AC-inverter and/or an AC-DC-inverter.
  • the stator comprises at least one stator-pole-pair, wherein the rotor comprises at least one rotor-pole-pair, wherein each pole-pair is formed by at least three coils.
  • the rotor-switching-device is adapted to provide the rotor with DC and/or AC.
  • the stator-switching-device is adapted to provide the stator with DC and/or AC.
  • the electric machine can be operated in all its operation modes as generator and as motor. In one embodiment the electric machine can be operated as double fed machine. Double fed electric machines are such electric machines in which the rotor also takes active part in energy conversion process.
  • the magnetic field created by the rotor is not static, but it is rotating relative to the rotor itself and electric energy is either “pumped” to the rotor or taken out of the rotor depending on current operation mode.
  • the rotor may create a variable pole magnetic field which rotates relative to the rotor itself.
  • the rotor as well as the stator can generate rotating magnetic fields (using e.g. three-phase AC).
  • the stator-switching-device is adapted to vary a number of stator-pole-pairs by electrically connecting appropriate stator-coils, wherein the rotor-switching-device is adapted to vary a number of rotor-pole-pairs by electrically connecting appropriate rotor-coils.
  • the electric machine can be a single fed synchronous machine.
  • the stator-coils are provided with AC and the rotor-coils are provided with DC.
  • the synchronous machine is an AC rotating machine whose speed under steady state condition is proportional to the frequency of the current in its armature, respectively, in its rotor. This is also named the “synchronous speed”.
  • the synchronous speed N is given by
  • Each pole pair comprises two poles, a north- and a south-pole.
  • the smallest pole pair number is “1” (e. g. 1 north pole and 1 south pole).
  • the number of stator-pole-pairs is the same as the number of rotor-pole-pairs. They correspond to each other. In other words, by varying the number of stator-pole-pairs, respectively, the number of rotor-pole-pairs, the number of magnetic poles and in consequence the synchronous speed N is changeable.
  • the electric machine is adapted to change the pole number, respectively, the pole angular pitch while working (the pole pitch is defined as a peripheral distance between centres of two adjacent poles and the pole angular pitch is defined as the angle formed by the centres of two adjacent poles to the rotor's rotation axis).
  • the electric machine can be operated at highest efficiency at different rotation speeds and a given power frequency.
  • Another embodiment of the invention is capable to operate as double fed electric machine. In such case rotation speed N is a product of pole pair number and two frequencies—one supplied to the rotor and the other supplied to the stator.
  • the electric machine in particular the rotor, can be operated with DC and/or AC, wherein AC comprises at least 3 phases.
  • AC comprises at least 3 phases.
  • a minimal number of phases is preferably 3 (phase A, phase B and phase C).
  • polyphase systems with more phases are possible, e. g. 6 phases.
  • the electric machine will operate as single fed induction machine. If the frequency of the multiphase AC source supplied to the rotor drops to zero then the electric machine will operate as single fed synchronous machine.
  • Further benefits can bring the ability to connect sensors to the rotor-switching-device to monitor key characteristics of the rotor during operation. For instance temperature, rotor coil electric currents and other important readings can be monitored inside the rotor and information passed to the stator-switching-device via the information channel or the communication connection, respectively, between the two switching devices, This way malfunctions can be anticipated before a major accident occurs. It is also possible a set of gyroscopic sensors inside the rotor to determine exact position of the rotor at a certain moment of time. This may eliminate the need of complicated other sensors mounted outside the rotor with the same function.
  • rotor-switching-device excites proper combination of rotor-coils to create rotor magnetic field with the same number of poles as the number of poles of momentary stator rotating magnetic field.
  • a method to operate an electric machine comprising a stator and a rotor, wherein the rotor is adapted to rotate relatively to the stator, and wherein the rotor comprises a rotor-switching-device which is arranged at the rotor, comprises the steps:
  • the method comprises also the steps:
  • the method according to the invention can include the features and advantages of the electric machine according to the invention and vice versa.
  • FIG. 1 shows a perspective view of an exemplary single fed embodiment of an electric machine
  • FIG. 2 a shows a stator and rotor design of the electric machine of FIG. 1 ;
  • FIG. 2 b shows a communication connection between a rotor-switching device and a stator-switching-device of the electric machine of FIG. 1
  • the electric machine 20 comprises a stator 40 and a rotor 60 .
  • a rotor-switching-device 64 is arranged at a rotor axis 61 of the rotor 60 .
  • Means for providing or conducting electric power 62 such as slip rings or rotary transformers are also arranged at the rotation axis 61 . In this embodiment, they conduct current or voltages DC+V or DC ⁇ V, respectively, to the rotor-coils r of the rotor 60 .
  • the electric machine 20 furthermore comprises a stator-switching-device 44 that is electrically connected to an AC power source or to phases A, B and C, respectively.
  • the stator-coils s of the stator 40 are provided with alternating current.
  • This type of electric machine is named single fed machine.
  • FIGS. 2 a and 2 b show the design of the electric machine 20 more detailed.
  • Switches l 19 , l 20 and l 21 are switched to position 1.
  • Stator-coil s 10 is connected to phase A.
  • Stator-coil s 11 is connected to phase B.
  • Stator-coil s 12 is connected to phase C.
  • Stator-coil s 13 is connected to phase A.
  • Stator-coil s 14 is connected to phase B.
  • Stator-coil s 9 is connected to phase C.
  • Rotor switches l 15 , l 16 , l 17 and l 18 are switched to position 2.
  • Switches l 19 , l 20 and l 21 are switched to position 2.
  • Stator-coil s 10 is connected in reverse to phase A.
  • Stator-coil s 11 is connected to phase B.
  • Stator-coil s 12 is connected in reverse to phase C.
  • Stator-coil s 13 is connected to phase A.
  • Stator-coil s 14 is connected in reverse to phase B.
  • Stator-coil s 9 is connected to phase. This forms a familiar two pole stator-coil configuration—A B- C A- B C-.
  • Rotor switches l 15 , l 16 , l 17 and l 18 are switched to position 3. This way the rotor-coils r 6 and r 8 will create a 2 pole magnetic field SN.
  • Rotor-coils r 5 and r 7 are connected in short to work in induction mode to assist the rotor to reach synchronous speed. When rotor speed is synchronized with stator rotating 2 pole field the rotor will follow synchronously the stator rotating field.
  • Switches l 19 , l 20 and l 21 are switched to position 1.
  • Stator-coil s 10 is connected to phase A.
  • Stator-coil s 11 is connected to phase B.
  • Stator-coil s 12 is connected to phase C.
  • Stator-coil s 13 is connected to phase A.
  • Stator-coil s 14 is connected to phase B.
  • Stator-coil s 9 is connected to phase C.
  • Rotor switches l 15 , l 16 , l 17 and l 18 are switched to position 4. This way the rotor-coils r 5 , r 6 , r 7 and r 8 are connected in short. Stator rotating field will induce currents in rotor-coils making the rotor follow stator field at sub synchronous speed.
  • Switches l 19 , l 20 and l 21 are switched to position 2.
  • Stator-coil s 10 is connected in reverse to phase A.
  • Stator-coil s 11 is connected to phase B.
  • Stator-coil s 12 is connected in reverse to phase C.
  • Stator-coil s 13 is connected to phase A.
  • Stator-coil s 14 is connected in reverse to phase B.
  • Stator-coil s 9 is connected to phase C.
  • Rotor switches l 15 , l 16 , l 17 and l 18 are switched to position 4. This way the rotor-coils r 5 , r 6 , r 7 and r 8 are connected in short. Stator rotating field will induce currents in rotor-coils making the rotor follow stator field at sub synchronous speed.
  • Rotor switches l 15 , l 16 , l 17 and l 18 are switched to position 1. All rotor-coils are open. The rotor will not produce any torque, regardless of presence of stator field and rotor power supply.
  • single fed machine there may be a DC to DC inverter as part of the rotor switching device. This way high voltage DC can be supplied to slip rings and the built in rotor switching device DC to DC inverter to reduce the voltage to appropriate level. This way current over slip rings will be reduced bringing down losses and wear of the slip rings.
  • the brushes and slip rings can be replaced by a rotating transformer, having its primary coil stationary and its secondary coil mounted on the rotor and rotating along with it. This way AC will be supplied and integrated in rotor switching device AC to DC inverter should provide transition from AC to DC current needed to excite rotor-coils to produce magnetic field, static relative to the rotor. In this case brushes and slip rings are eliminated altogether.
  • FIG. 3 basically shows the same concept as FIG. 1 .
  • a rotor 60 is provided with alternating current.
  • This type of machine is named doubly fed machine.
  • FIG. 4 b shows the design in detail.
  • FIG. 4 a shows basically the same design as FIG. 2 b .
  • a rotor-switching-device 64 is provided with alternating current C′, B′, A′.
  • Switches l 15 , l 16 , l 17 , l 18 , l 34 and l 35 are operated by a rotor-control-unit 66 so that their switch position is the same and changed simultaneously from 1 to 4.
  • Switches l 19 , l 20 and l 21 are operated by a stator-control-unit 46 so that their switch position is the same and changed simultaneously from 1 to 2. All switches depicted on FIG. 4 a are shown in position 1.
  • Rotor-coil r 5 is connected to phase A′
  • rotor-coil r 6 is connected to phase C′
  • rotor-coil r 7 is connected to phase B′
  • rotor-coil r 8 is connected to phase A′
  • rotor-coil r 32 is connected to phase C′
  • rotor-coil r 33 is connected to phase B′.
  • Switches l 19 , l 20 and l 21 are switched to position 2.
  • Stator-coil s 10 is connected in reverse to phase A.
  • Stator-coil s 12 is connected in reverse to phase C.
  • Stator-coil s 13 is connected to phase A.
  • Stator-coil r 14 is connected in reverse to phase B.
  • Stator-coil s 9 is connected to phase C. This forms a familiar two pole stator-coil configuration—A B- C A- B C-.
  • Rotor switches l 15 , l 16 , l 17 , l 18 , l 34 and l 35 are switched to position 3.
  • Rotor-coil r 5 is connected to phase A′
  • rotor-coil r 6 is connected in reverse to phase C′
  • rotor-coil r 7 is connected to phase B′
  • rotor-coil r 8 is connected in reverse to phase A′
  • rotor-coil r 32 is connected to phase C′
  • rotor-coil r 33 is connected in reverse to phase B′.
  • Switches l 19 , l 20 and l 21 are switched to position 1.
  • Stator-coil s 10 is connected to phase A.
  • Stator-coil s 11 is connected to phase B.
  • Stator-coil s 12 is connected to phase C.
  • Stator-coil s 13 is connected to phase A.
  • Stator-coil s 14 is connected to phase B.
  • Stator-coil s 9 is connected to phase C.
  • Rotor switches l 15 , l 16 , l 17 , l 18 , l 34 and l 35 are switched to position 4.
  • Stator rotating field will induce currents in rotor-coils making the rotor follow stator field at sub synchronous speed.
  • Two pole induction mode operation Switches l 19 , l 20 and l 21 are switched to position 2.
  • Stator-coil s 10 is connected in reverse to phase A.
  • Stator-coil s 11 is connected to phase B.
  • Stator-coil s 12 is connected in reverse to phase C.
  • Stator-coil s 13 is connected to phase A.
  • Stator-coil s 14 is connected in reverse to phase B.
  • Stator-coil s 9 is connected to phase C.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Metallurgy (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Glass Melting And Manufacturing (AREA)
  • Silicon Compounds (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Synchronous Machinery (AREA)
US14/391,970 2013-11-28 2014-09-08 Electric Machine Abandoned US20150364978A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP13194963.8A EP2878584B1 (fr) 2013-11-28 2013-11-28 Procédé de fabrication d'un composant revêtu avec verre de quartz ou silice fondue
EP13194963.4 2013-11-28
PCT/EP2014/069035 WO2015078603A1 (fr) 2013-11-28 2014-09-08 Machine électrique

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US20150364978A1 true US20150364978A1 (en) 2015-12-17

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US14/391,970 Abandoned US20150364978A1 (en) 2013-11-28 2014-09-08 Electric Machine
US14/543,718 Active US9680360B2 (en) 2013-11-28 2014-11-17 Method for producing a coated component of transparent or opaque fused silica

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Application Number Title Priority Date Filing Date
US14/543,718 Active US9680360B2 (en) 2013-11-28 2014-11-17 Method for producing a coated component of transparent or opaque fused silica

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US (2) US20150364978A1 (fr)
EP (1) EP2878584B1 (fr)
JP (1) JP5940134B2 (fr)
KR (1) KR101649523B1 (fr)
CN (1) CN104671670B (fr)

Cited By (5)

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US20180375414A1 (en) * 2015-10-15 2018-12-27 Vastech Holdings Ltd. Electric motor
US20200106318A1 (en) * 2016-10-28 2020-04-02 Waymo Llc Devices and Methods for Driving a Rotary Platform
US10916999B2 (en) 2013-03-19 2021-02-09 Intellitech Pty Ltd Device and method for using a magnetic clutch in BLDC motors
US11462983B2 (en) 2017-12-28 2022-10-04 Intellitech Pty Ltd Electric motor
US11909263B1 (en) 2016-10-19 2024-02-20 Waymo Llc Planar rotary transformer

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US10604438B2 (en) * 2015-07-15 2020-03-31 Heraeus Quartz America Llc Process for joining opaque fused quartz to clear fused quartz
EP3173386B1 (fr) * 2015-11-25 2018-05-02 Heraeus Quarzglas GmbH & Co. KG Procede de fabrication d'un corps composite a partir de matiere à haute teneur en silice
US10015879B2 (en) * 2016-01-27 2018-07-03 Corning Incorporated Silica content substrate such as for use harsh environment circuits and high frequency antennas
EP3248950B1 (fr) * 2016-05-24 2020-08-05 Heraeus Quarzglas GmbH & Co. KG Procede de production d'un verre de quartz opaque poreux
JP6878829B2 (ja) * 2016-10-26 2021-06-02 東ソー株式会社 シリカ粉末及び高流動性シリカ造粒粉末並びにその製造方法
US20180127296A1 (en) * 2016-11-10 2018-05-10 Goodrich Corporation Additive manufacture of optical components
JP7162491B2 (ja) * 2018-10-17 2022-10-28 信越石英株式会社 多層構造シリカガラス体の製造方法
JP7157932B2 (ja) * 2019-01-11 2022-10-21 株式会社Sumco シリカガラスルツボの製造装置および製造方法
CN110064729A (zh) * 2019-05-22 2019-07-30 惠州市惠阳广杰五金制品有限公司 壳膜制作工艺
EP4108641A1 (fr) 2021-06-24 2022-12-28 Heraeus Quarzglas GmbH & Co. KG Corps moulé en verre de quartz opaque, ainsi que son procédé de fabrication

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US9680360B2 (en) 2017-06-13
US20150143848A1 (en) 2015-05-28
CN104671670A (zh) 2015-06-03
JP5940134B2 (ja) 2016-06-29
EP2878584A1 (fr) 2015-06-03
KR20150062143A (ko) 2015-06-05
KR101649523B1 (ko) 2016-08-19
EP2878584B1 (fr) 2017-01-04

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