baber/WOPTO huggingface dataset:
Patent CN-113529554-B (CN)
IPC: E01C23/09
Filed: 2021-09-15
Granted: 2021-12-21
Abstract: 本发明公开了一种切缝深度可控的桥梁道路施工用环保型切缝装置，属于道路施工技术领域，其包括安装箱、位移轮、安装框、限位框和切割轮，所述安装箱的下表面设置有位移轮，所述出气管与冷却头之间连接有软管。该切缝深度可控的桥梁道路施工用环保型切缝装置，通过可握持转动的转环使得转环在转动时能够通过调节齿轮带动调节块转动，调节块通过与位移杆的螺纹连接带动位移杆和安装杆向下滑动，从而改变安装杆下端安装的切割轮切入路面的深度，利用调节齿轮上下滑动时可以分别与2个调节块交替卡合或者同时卡合的方式，使得2个切割轮可以以不同的深度切入路面，从而分两次切割至所需的深度，保证切缝的边缘整齐美观不易崩裂，延长了路面的使用寿命。
Patent CN-113776927-B (CN)
Title: 用于灯具钢化玻璃加工的检验装置及检验方法
IPC: G01N3/48
Filed: 2021-11-11
Granted: 2022-06-17
Abstract: 本发明涉及钢化玻璃技术领域，且公开了用于灯具钢化玻璃加工的检验装置及检验方法，解决了不便于调节铁球撞击钢化玻璃的位置，而且钢化玻璃撞击碎裂后，不便于对碎裂的玻璃进行收集，进而不便于实际使用的问题，其包括钢化玻璃支撑箱本体和碎玻璃收集箱本体，所述碎玻璃收集箱本体设于钢化玻璃支撑箱本体内，钢化玻璃支撑箱本体和碎玻璃收集箱本体均为顶端开口的空腔结构，碎玻璃收集箱本体的顶部设有两个活动支撑座，两个活动支撑座相靠近的一侧均固定连接有第一支撑托板，活动支撑座远离第一支撑托板的一侧固定连接有限位活动板；可以根据实际需求，调节铁球支撑管和铁球的位置，以及便于对碎裂的玻璃进行清理。
Patent CN-113816506-B (CN)
IPC: C02F5/14
Filed: 2021-11-22
Granted: 2022-04-01
Abstract: 本发明属于水处理剂领域，公开了一种反渗透阻垢剂及其制备方法，所述反渗透阻垢剂包括按重量份数计的如下组分：新型有机膦超支化大分子20‑45份、丙烯酸‑聚乙二醇单甲醚‑次磷酸钠三元共聚物50‑75份、去离子水5‑30份。解决了目前市场反渗透阻垢剂无法满足“零排放”高盐水、矿井水等高硫酸根高盐反渗透系统的运行使用，导致的硫酸盐结垢、污堵，清洗困难，产水量低，产水水质差，生产非停，运行成本高，能耗高等一系列问题，有效解决了目前工业废水零排放、矿井水综合利用项目的运行中的突出问题。
Patent CN-114088423-B (CN)
Title: 一种座椅调节器的耐久性能测试系统
IPC: G01M99/00
Filed: 2022-01-21
Granted: 2022-04-12
Abstract: 本发明涉及耐久检测技术领域，用于解决现有的座椅调节器耐久性能测试系统无法结合实际使用情况进行测试分析的问题，具体为一种座椅调节器的耐久性能测试系统，包括测试平台，测试平台通信连接有状态检测模块、用户分析模块以及综合分析模块，状态检测模块用于对座椅调节器的工作状态进行检测分析并得到状态表现值ZB，体重分析单元用于对用户的体重进行分析检测并得到压力表现值YB，频率分析单元用于对座椅调节器的使用频率进行分析检测并得到频率表现值PB；本发明是通过状态检测模块可以对出厂后的座椅调节器的使用状态进行检测分析，从而反映出座椅调节器的实际使用状态，提高耐久性能检测结果的精确性。
Patent CN-114216786-B (CN)
IPC: G01N3/08
Filed: 2022-02-22
Granted: 2022-05-17
Abstract: 本发明属于借助于测定材料的物理性质来测试或分析材料技术领域，具体涉及一种切顶卸压无煤柱自成巷三维物理模型试验系统和方法。系统包括：框架系统、液压伺服加载系统和控制及测试系统，框架系统包括底座、左立壁、右立壁、前移动体、后移动体、横梁和料框，底座、左立壁、右立壁、前移动体、后移动体和横梁围合形成容置空间，料框设置于底座上，并位于容置空间内；液压伺服加载系统设置于容置空间内，包括六个加载平面和加载油缸，六个加载平面上的加载油缸分别固定在底座、左立壁、右立壁、前移动体、后移动体和横梁上；控制及测试系统与每一个加载油缸的伺服阀电性连接。本发明能够实现三向六面加载及110工法开采全过程模拟。
Patent GE-P20012513-B (GE)
Title: Medical Device and Nonreusable Syringe
Inventor: SHO TOMAZ J
IPC: A61M5/00
Filed: 1994-09-07
Abstract: 1. Technical Result Increase in reliability, simplification of production and assembly.          2. Essence A device comprises a needle 34, a drain mechanism and a sliding element 24 movable within the body 12. The drain mechanism comprises a needle holder 84, a displacing element 96 for applying force to the needle holder and a retainer ring 102. The needle holder and the retainer ring are connected with the capability of separation which are guided with sliding contact surfaces and have the capability of drainage on account of their respective displacement caused by the movement of the sliding element.          3. Field of Application Medical devices, in particular nonreusable syringes.
Patent GE-P19970857-B (GE)
Title: Charge for Ceramic Composite Material Al2O3 B4C TiB2
Inventor: LEKISHVILI KARLO
IPC: C01B31/36
Filed: 1995-06-08
Abstract: This invention refers to powder metallurgy, in particular to charge composition for synthesis of aluminium oxide with boron carbide and titan diboride.    Technical result of the invention is to improve mechanical properties of product obtained by charge synthesis, to simplify and to cheapen the technology that is achieved in that the charge for synthesis of aluminium oxide, titan diboride and boron carbide contains boron anhydride, aluminium and carbon black, titan powder dispersed to 5-1000 mkm, boron powder and boron carbide dispersed to 10-20 mkm, in the following proportion of components (mass %): Boron anhydride	37,4 - 38,6 Aluminium	28,2 - 32,3 Carbon black 3,1 - 3,3 Titan 7,0 - 14,2 Boron carbide 6   - 21 Boron 3,2 - 5,8
Patent GE-P20002144-B (GE)
Title: Ceramic Flux
Inventor: IAKOBASHVILI KARLO
IPC: B23K35/36
Filed: 1999-02-05
Abstract: 1. Technical Result Improvement of welding,   technological properties and the quality of weld.         2. Essence A ceramic flux comprises manganese ore, fluorspar, quartz sand, water glass, silicomanganese and kaolin in the following proportion of components, mass%:  Manganese ore 47-55 Fluorspar 7-10 Quartz sand 22-30 Kaolin 1-2 Silicomanganese 10-17 Water glass 15-20 3. Field of Application Welding, in particular welding materials
Patent GE-P20033065-B (GE)
Title: Precipitation Tank
Inventor: NIKOLAISHVILI VIOLA
IPC: B01D21/02
Filed: 2002-06-21
Abstract: 1. Technical Result Improvement of water purification.         2. Essence Water is fed to a precipitation chamber 2 with dead walls 9 by a water conveyance pipe 7. The detritus comprising water is fed into the second part of the chamber via the window 5 disposed between the partition 4 of the chamber and the base of the housing and after passing-by across the wall 3 of the chamber comes into the adjoining chamber; the water passes in series all the chambers and comes to the last one with dead walls, from which by means of water outlet it flows out from the precipitation tank purified. The precipitate on the conical bottom is gradually taken by water flow from all the chambers through precipitate removing windows 11 of the precipitate removing cylindrical pipe 10, which are opened and closed by the control mechanism.           3. Field of Application Construction of hydraulic structures.
Patent GE-P20053612-B (GE)
Title: Device for Purifying Water
Inventor: MARKARJAN SARKIS
IPC: C02F1/32
Filed: 2004-07-15
Abstract: 1. Technical Result Increase in efficiency of water purification and increase in purified water amount. 2. Essence A device comprises a hollow body 1 having the form of triangular prism with the water input opening 3 and output jet 4, along the ribs of the body there are mounted ultra-violet lamps 5 disposed in quartz housing passing ultra-violet beams. Along the prism axle there are nozzles 7 for active movement and creation of turbulent flow of water. In the end of the body (along the direction of water flow) copper electrodes 8 are mounted. In the case of the need for purification of great flow of water the treatment devices are collected into the blocks 9. 3. Field of Application Environmental protection, waste water purification.
Patent GE-P20207146-B (GE)
Title: New gadolinium chelate compounds for use in magnetic resonance imaging
Inventor: BAYER PHARMA AKTIENGESELLSCHAFT
IPC: C07D257/02
Filed: 2016-05-30
Abstract: Present invention relates to new class of high relaxivity extracellular gadolinium chelate compl-exes on the basis of low molecular nuclear polya-mines, to methods of preparing said compounds, and to the use of said compounds as MRI contrast agents.
Patent CA-1310659-C (CA)
Title: Tricyclic alcohols ethers and esters process for preparing same and use thereof in augmenting or enhancing the organoleptic properties of consumable materials
Inventor: LIGHT KENNETH K
IPC: C07C69/013
Filed: 1983-03-04
Granted: 1992-11-24
Abstract: ABSTRACT OF THE INVENTION     Described are compounds having the generic structure:       wherein     R1 represents hydrogen, methyl or acetyl and wherein R2, R3, R4 and R5 represent the same or different hydrogen, methyl or ethyl; a process for preparing same using compounds designed according to the generic structure:       and organoleptic uses thereof in perfumes, colognes, perfumed articles such as anionic, cationic, nonionic or zwitterionic solid or liquid detergents, cosmetic powders,  fabric softener compositions and dryer-added fabric softener articles, as well as in foodstuffs, chewing tobaccos, smoking tobaccos and smoking tobacco articles, e.g., the body of smoking tobacco, the wrapper or the filter therefor.     Thus, the tricyclic alcohol, ether or ester compounds of our invention having the generic structure:       impart, augment or enhance dry woody (cedary, vetiver),  thymol-like, camphoraceous, amber, sandalwood-like, fresh, sweaty, fruity, castoreum, cedrus atlantica, patchouli-like, labdanum, green, fruity, woody, cigar box-like, oriental, cedarwood-like, minty, spicy, floral (rose), vetiver-like,  grapefruit oil-like, fruity and sweet aromas in or to perfume  compositions, colognes and perfumed articles as well as oriental/incense, herbaceous, minty, earthy, woody, tobacco-like and cedarwood-like aromas and tastes to foodstuffs, chewing tobaccos, smoking tobaccos and smoking tobacco articles; wherein in the smoking tobaccos and smoking tobacco articles, these aromas and tastes are both prior to and on smoking in both the main stream and the side stream.
Patent CA-1341240-C (CA)
Title: Dna encoding human tumor necrosis factor and human tumor necrosis factor polypeptide
Inventor: YAMAGISHI JUNITI
IPC: C12P19/34
Filed: 1985-03-04
Granted: 2001-06-05
Abstract: A novel cloned DNA encoding a human tumor necrosis factor (TNF), a vector having said DNA inserted thereinto, a host transformed with said vector and a novel human TNF polypeptide, and processes for producing them.
Patent CA-1283745-C (CA)
Title: Friction material composites containing crystalline phosphate fibers and a process for the preparation thereof
Inventor: CRUTCHFIELD MARVIN M
IPC: F16D69/02
Filed: 1986-03-13
Granted: 1991-04-30
Abstract: FRICTION MATERIAL COMPOSITES CONTAINING     CRYSTALLINE PHOSPHATE FIBERS AND PROCESS FOR                THE PREPARATION THEREOF               ABSTRACT OF THE INVENTION            Asbestos-free friction material composites containing asbestiform crystalline calcium M phosphate fibers wherein M is a metal cation selected from the group consisting of sodium and lithium, and mixtures thereof, are useful as brake pads, brake linings, clutch facings, and the like where friction material composites are needed.  Such composites are prepared by (a) blending asbestiform crystalline calcium M phosphate fibers wherein M is a metal cation selected from the group consisting of sodium and lithium, and mixtures thereof, a thermosetting resin-based binder, a particulate friction modifier, and a particulate inorganic filler to form a uniform mixture; (b) placing the mixture within a mold cavity having a shape approximately that of the desired composite; and (c) compressing the mixture at a temperature and a pressure, and for a time, sufficient to form the asbestos-free friction material composites.
Patent CA-1288604-C (CA)
Inventor: WANG FRANK S
IPC: E02B/
Filed: 1986-03-18
Granted: 1991-09-10
Abstract: Abstract of the Disclosure Disclosed is a bottom-founded platform for deepwater application in an area which is subjected to sea ice and other environmental loadings.  Ice effects which have resulted in collapse of prior jacket structures in ice zones is avoided by the provision of an ice- fracturing cone being provided at the top of the jacket structure in the stratum of expected ice occurrence.  On-site subsea storage is also provided for the jacket structure.  The combined structure permits the exploitation of the subsea hydrocarbons in hostile environments which were previously inaccessible because of the combined factors of deep water, ice loads, and soft surficial sea bed conditions.
Patent CA-1276669-C (CA)
Title: Circuit breaker with arc chamber vent
Inventor: GRUNERT KURT A
IPC: H01H73/20
Filed: 1986-04-24
Granted: 1990-11-20
Abstract: 52,623 ABSTRACT OF THE DISCLOSURE A circuit breaker with arc chamber vent charac-terized by a molded insulating housing containing circuit breaker means and an arc quenching chamber,  the housing having  wall  means  forming  a  compartment  containing  a terminal,  and  the  wall  means  having  gas  vent  opening communicating between the chamber and the compartment and a tubular wall surrounding the terminal for preventing any arc gases exhausting from the chamber into the compartment from causing electrical breakdown between the terminal and any proximate conductor.
Patent CA-1272941-C (CA)
Title: Multilayer ion test means
Inventor: CHARLTON STEVEN C
IPC: G01N33/84
Filed: 1986-06-10
Granted: 1990-08-21
Abstract: MULTILAYER ION TEST MEANS ABSTRACT OF THE DISCLOSURE A multilayer test means for determining the presence of an ion in an aqueous test sample, a method for preparing it and a method for using it. The test means comprises a reagent layer containing an ionophore capable of forming a complex with the ion and reporter substance capable of interacting with the complex of ionophore and ion to produce a detectable response, a reflecting layer and option-ally an opacifying layer. The multilayer format is particularly suited to whole blood electrolyte determinations and does not require washing or wiping before use. A hematocrit independent whole blood potassium test is provided.
Patent CA-1280678-C (CA)
Title: Pneumatic tires
Inventor: HOLROYD ERIC
IPC: B60C9/26
Filed: 1986-06-19
Granted: 1991-02-26
Abstract: ABSTRACT            This invention relates to pneumatic tyres having the tread portion (11) reinforced by a breaker (17) comprising two belts (18) and (19).  Each belt is reinforced by a single continuous cord (21) formed into a chevron pattern, preferably 'v' shaped by extending back and forth across the belt (18) or (19) with loops (22) at the belt edges (25) (26),  The chevron configuration in one belt (18) pointing in the opposite direction to the chevron configuration in the other belt (19).
Patent CA-1277610-C (CA)
Title: Electromagnetic clutch-brake positioning assembly
Inventor: FAIREY BRIAN M
IPC: B41K3/64
Filed: 1986-10-15
Granted: 1990-12-11
Abstract: Abstract of the Disclosure An electromagnetic, clutch-brake, positioning assembly is shown in an endorsing or printing environment which requires precise positional control.          The assembly has an output shaft and a second output member which is an output gear which is located close to a rotary input member.  The assembly also includes a feedback system which monitors the wear of an associated brake pad in the assembly to adjust the energization of the associated electromagnetic clutch and braking coils to maintain accurate positional control.
Patent CA-1298551-C (CA)
Title: Extracellular matrix induction method to produce pancreatic islet tissue
Inventor: DUDEK RONALD W
IPC: A61K35/39
Filed: 1987-04-01
Granted: 1992-04-07
Abstract: ABSTRACT OF THE DISCLOSURE      A method and composition of regenerating tissue.  More specifically, a method for regenerating pancreatic islet tissue having the histological and insulin-containing properties of islets typically found in neonatal or adult animals is described.  The regenerated islet tissue is produced by fetal mesenchyme acting upon an epithelium such that an inductive message causes the epithelium to differentiate into islet tissue.
Patent CA-1304489-C (CA)
Title: Optical devices
Inventor: MALLINSON STEPHEN R
IPC: G02F1/137
Filed: 1987-04-03
Granted: 1992-06-30
Abstract: ABSTRACT                 OPTICAL DEVICES     A liquid crystal device (5) having smectic phase liquid crystal material in two transparent states of differing molecular orientation, each state presenting a different refractive index to polarised light transmitted therethrough, may be utilised to perform various optical junctions.  For example, switchable waveguides (6,7) a ring resonator or a diffraction grating may be produced by appropriate arrangment of the material in the two states.            Figure 1
Patent CA-1314365-C (CA)
Title: High modulus pitch-based carbon fiber and method for preparing same
Inventor: HINO TAKASHI
IPC: D01F9/145
Filed: 1987-05-04
Granted: 1993-03-16
Abstract: ABSTRACT OF THE DISCLOSURE          A method is disclosed for producing extremely high modulus carbon fibers by carbonization at a substantially lower temperature than in conventional methods, for example, at about 2500°C.  This is made possible by selectively stabilizing only an outer surface layer portion of a carbonaceous pitch-based fiber comprised mainly of optically anisotropic components, while retaining the inner portion of the fiber in a non-stabilized state and without damage to the crystallinity thereof.
Patent CA-1303303-C (CA)
Inventor: WAKUI TSUNEYOSHI
IPC: B21D22/20
Filed: 1987-06-26
Granted: 1992-06-16
Abstract: STEEL SLEETS FOR DI CANS          Abstract of the Disclosure A steel sheet for DI can having improved DI workability and resistance to die abrasion has such a surface profile that a center-line average surface roughness is within a range of 0.1?4.0 µm and a microscopic shape is comprised of mountain portions, groove-like valley portions and middle flat portions satisfying particular dimension relations.
Patent CA-1335326-C (CA)
Title: Electrical insulating oil composition
Inventor: SATO ATSUSHI
IPC: H01B3/22
Filed: 1987-09-03
Granted: 1995-04-25
Abstract: An electrical insulating oil composition having good low temperature characteristics which comprises at least 4 members selected from the group consisting of (a) m-ethylbiphenyl, (b) p-ethylbiphenyl, (c) o-benzyltoluene, (d) m-benzyltoluene, (e) p-benzyltoluene, (f) 1,1-diphenyl-ethane, and (g) 1,1-diphenylethylene; and is characterized in that the proportion of solid phase at a temperature of -40°C of the electrical insulating oil composition is not more than 45% by weight and the proportion of the total quantity of solid phase is calculated according to the following general equation of solid-liquid equilibrium:     Xi =               wherein Xi is the equilibrium mole fraction of a component i in the liquid phase of the composition, .DELTA.H? is the heat of fusion (cal.mol-1), T? is the melting point (K), T is the temperature (K), and R is the gas constant (cal.mol-1.K-1).
Patent CA-1305796-C (CA)
Title: Method and apparatus for multi-pulse speech coding
Inventor: SHIBAGAKI KOUICHI
IPC: G10L19/10
Filed: 1987-09-17
Granted: 1992-07-28
Abstract: ABSTRACT          The invention is a technique for reducing the amount of calculation necessary for the pulse search in multi-pulse coding of a speech signal.  This involves adding crosscorrelations between an impulse response of a synthetic filter without pitch prediction and an impulse response of a synthetic filter with pitch pre-diction, thereby determining autocorrelations of the impulse response of the synthetic filter with pitch prediction.  Another step is adding crosscorrelations between the impulse response of the synthetic filter without pitch prediction and an input speech signal to determine crosscorrelations between the impulse response of the synthetic filter with pitch prediction and the input speech signal.
Patent CA-1286054-C (CA)
Title: Portable hammock frame
Inventor: RAWLINS MARK W
IPC: A45F3/24
Filed: 1987-09-18
Granted: 1991-07-16
Abstract: ABSTRACT      The use of hammocks is known and are used primarily for one location set ups. These hammocks are comprised of round tubular steel structures supporting a material or web like sling between two elevated ends of the said steel structure. The said steel structures generally comprising parallel bars which run along ground level thus acting as support arms out extending upwards and meeting creating the support for the said material on web like sling.     In this invention the support frame is designed to be fully portable.  The material sling is supported by a T-Bar like configuration on either end of the said sling.  The T-Bars insert into a single swing support arm at either end of the main body frame.  The said single swing support arms are fastened to either end of the main body frame by a pivoting hinge arrangement allowing the said swing support arms to rotate under and into the main frame when moved away from each other but come to a stop on the main frame if moved toward each other.  The said stop allowing the two said swing support arms to move to a pre-determined distance apart and no further thus creating the gap in which the said material like sling stretches between.  The said main frame body comprises a hinging mechanism in the middle allowing said main frame to be folded in half.  On both ends of said main frame, two tubular female connections act as receptors for two male connections which fasten cross support legs to said main frame.
Patent CA-1301323-C (CA)
Title: Portable data scanner apparatus
Inventor: ZOUZOULAS JOHN
IPC: G06K7/10
Filed: 1987-09-28
Granted: 1992-05-19
Abstract: ABSTRACT     The present invention provides an integrated self-contained portable data scanner apparatus which is suitable for long periods of uninterrupted handheld use for purpose such as the bar code scanning of inventory.  The apparatus includes a number of modules interconnected into a self-contained unit with no external cabling necessary.  The basic modules are a scanner module, a data module including one or more data processing components such as a keyboard, a display or a microprocessor, and a removable rechargeable power module.
Patent CA-1286282-C (CA)
Title: Bit design for a rotating bit incorporating synthetic polycrystalline cutters
Inventor: GRAPPENDORF RICHARD H
IPC: E21B10/60
Filed: 1987-10-15
Granted: 1991-07-16
Abstract: Abstract of the Disclosure Hydraulic flow may be rendered substantially uniform throughout the waterways on a rotating bit from the center of the bit to the cuter gage.  This is accomplished by defining waterways into the bit face below a primary surface of the bit face.  A colinear land is then disposed into the waterway, but does not extend above the primary surface of the bit face.  A plurality of teeth are then disposed on the colinear land and extend above the primary surface of the bit face.  The flow of hydraulic fluid is prevented from dispersing as the fluid moves from the center of the bit to the outer gage.  Cutting by kerfing is further optimized by arranging triads of cutters on each of the pads disposed in the waterways into a set.  Each triad of cutters corresponds to additional triads of cutters in azimuthally subsequent and adjacent pads in the next subsequent waterway, thereby forming the set of associated triads of cutters.  Each triad of cutters in the set is radially offset from the corresponding triads in the set.  Therefore, while each triad cuts through a kerfing action individually, each triad relates to the preceding triad of cutters to cut into the kerfed lands made by that preceding triad of cutters and thus to cut through a kerfing action as well.
Patent CA-1298315-C (CA)
Title: Process for the preparation of fluorobenzaldehydes
Inventor: METZ HANS J
IPC: C07C45/63
Filed: 1987-10-30
Granted: 1992-03-31
Abstract: Abstract A process for the production of fluorobenzaldehydes which comprises reacting a chlorobenzaldehyde with an alkali fluoride in a dipolar aprotic medium.
Patent CA-1294207-C (CA)
Title: Method and apparatus for vacuum packaging
Inventor: MOBARK BENGT U
IPC: B65B31/02
Filed: 1987-11-13
Granted: 1992-01-14
Abstract: A B S T R A C T METHOD AND APPARATUS FOR VACUUM PACKAGING          A support tray 6a with a product 11a thereon is covered loosely by a cover sheet 8 in a first chamber portion 12 to be drawn upwardly into contact with the heated walls of a shallow first mould cavity. The combination of the product 11a, support tray 6a and cover sheet 8 is then advanced to a second chamber portion 13 defined by a deeper second mould cavity into which the cover sheet can be drawn while vacuum is applied to the interior of the ensuing pack through slits in the tray 6a, by means of suction ports 20.
Patent CA-1288228-C (CA)
Inventor: ERICKSON ROBERT A
IPC: B23B31/22
Filed: 1987-11-18
Granted: 1991-09-03
Abstract: ABSTRACT OF THE DISCLOSURE           In the present invention a tubular toolholder shank is releasably held in the bore of a tool support member by a releasable locking mechanism mounted in the bore of the tool support member and receivable in the tubular toolholder shank.  The locking mechanism has an actuating member radially extending through the wall of the tubular shank.
Patent CA-1286714-C (CA)
Title: Start-up system for a synchronous motor drive
Inventor: ABBONDANTI ALBERTO
IPC: H02P1/46
Filed: 1988-02-05
Granted: 1991-07-23
Abstract: ABSTRACT OF THE DISCLOSURE         In a load commutated inverter (LCI) motor drive, the motor is started from a rotor rest position by modulat-ing the rotor winding with a field current  at a constant rate to induce stator voltages which are detected in terms of signs, so as to identify the rotor rest position. The induced stator voltages are used to select an initial pair of thyristors of the inverter to be turned On in the firing sequence for the chosen direction of rotation under normal operation of the drive.