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公开(公告)号：JPH1022109A
公开(公告)日：1998-01-23
申请号：JP7599197
申请日：1997-03-27
Applicant: ABB RESEARCH LTD
Inventor： GLATZ-REICHENBACH JOACHIM DR , GREUTER FELIX DR , MAUTHE GERHARD , KLAUS SCHUELER , SKIUDHOJ JORGEN , RALF STRUMPLLER , ZDENEK PELANEK
Abstract: PROBLEM TO BE SOLVED: To provide a current-limiting resistor having PTC characteristics which can be manufactured simply and at a low cost and which exhibits a large current-carrying capacity, a wide range of voltage and a high reliability of operation. SOLUTION: A current-limiting resistor is provided with two connecting electrodes 1 and 2 which are placed in parallel to each other and a resistor 3 having PTC characteristics which is in contact with the connecting electrodes 1 and 2 on its flat surface. A varistor 40 is conductively in contact with the resistor 3. The resistor 3 includes first two contact surfaces 50 and 51 and a first answering part 60. The answering part is connected in parallel to the first varistor 40 through the two contact surfaces 50 and 51 and carries out a PTC shift above the threshold of the current passing in the resistor.
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公开(公告)号：AT218242T
公开(公告)日：2002-06-15
申请号：AT98811217
申请日：1998-12-10
Applicant: ABB RESEARCH LTD
Inventor： GLATZ-REICHENBACH JOACHIM DR , STRUEMPLER RALF DR , SKINDHOJ JOERGEN DR , GREUTER FELIX DR
Abstract: The resistor body of a nonlinear resistor element having PTC characteristics includes a pulverulent first filler, whose material, e.g. TiB2, TiC, VC, WC, ZrBr2, MoSi2, has a specific conductivity of at most 10-3 OMEGA cm and in which the particle sizes are between 10 and 40 mu , and also, in order to improve the voltage sustaining capability by extending the switching zone and to achieve uniform energy absorption, includes a likewise pulverulent second filler having varistor characteristics and particle sizes between 50 and 200 mu , whose specific resistance at field strengths >/=2000 V/cm such as occur in the switching region of the resistor element and above, is at most 50 OMEGA cm, preferably at most 15 OMEGA cm, the fillers being embedded in a matrix made of a thermoplastic, in particular HD polyethylene or a thermoset. The average particle size of the second filler should exceed that of the first filler by a factor of from 2 to 5. A potentially particularly suitable material for the second filler is SiC doped with Al, B, Ga, In, N, P, As, as is similarly doped ZnO.
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公开(公告)号：DE19800470A1
公开(公告)日：1999-07-15
申请号：DE19800470
申请日：1998-01-09
Applicant: ABB RESEARCH LTD
Inventor： GLATZ-REICHENBACH JOACHIM DR , STRUEMPLER RALF DR , SKINDHOJ JOERGEN DR , GREUTER FELIX DR
Abstract: A resistor comprises a polymer matrix containing a low resistivity first filler and a second filler with a resistivity which decreases with increasing field strength and which has a specified maximum value at high field strengths. An electric resistor element with a resistive body of a polymer matrix, a first filler powder with a resistivity of \}10 OMICRON .cm and a second filler powder with a resistivity which decreases with increasing field strength and which has a value of \}50 OMICRON .cm at field strengths of \-2000 V/cm. Preferred Features: The second filler has a resistivity of \-10 OMICRON .cm and an average particle size greater than that of the first filler, the quotient of the average particle size of the first filler and that of the second filler being 2-5. The first filler consists of TiB2, TiC, VC, WC or ZrB2 of 10-40 mu m particle size and the second filler consists of doped SiC or doped ZnO of 50-200 mu m particle size. The resistive body contains 30-70 vol.% first filler and 10-40 vol.% second filler.
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公开(公告)号：DE59306823D1
公开(公告)日：1997-07-31
申请号：DE59306823
申请日：1993-08-25
Applicant: ABB RESEARCH LTD
Inventor： BAIATU TUDOR DR , GREUTER FELIX DR , STRUEMPLER RALF DR
Abstract: The electrical resistor element (10) contains, arranged between two plane-parallel electrodes (1, 2) exposed to pressure, a resistor body (3) having a positive temperature characteristic and comprising a polymer matrix and two filler components of electrically conductive particles embedded in the polymer matrix (4). When a short-circuit occurs, the resistivity of the resistor body (3) changes suddenly above a temperature limit value in a surface layer located on the electrodes and containing at least a first of the two filler components. A second of the two filler components is selected such that a binder material containing at least a polymer matrix and a second filler component has a positive temperature characteristic with a step response which is at least an order of magnitude higher than the surface layer. At the same time, this binder material has a resistivity which is at least an order of magnitude less than a binder material formed by polymer matrix and a first filter component. The resistor element has a high rated current-carrying capacity and can limit large short-circuit currents with long-lasting effect.
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公开(公告)号：AT262726T
公开(公告)日：2004-04-15
申请号：AT98811171
申请日：1998-11-26
Applicant: ABB RESEARCH LTD
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Patent Agency Ranking
公开(公告)号：ES2107580T3
公开(公告)日：1997-12-01
申请号：ES93108622
申请日：1993-05-28
Applicant: ABB RESEARCH LTD
Inventor： GREUTER FELIX DR , SCHULER CLAUS DR , STRUMPLER RALF DR
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公开(公告)号：ES2239437T3
公开(公告)日：2005-09-16
申请号：ES99810304
申请日：1999-04-13
Applicant: ABB RESEARCH LTD
Inventor： GREUTER FELIX DR , HAGEMEISTER MICHAEL , KLUGE WOLFGANG DR
Abstract: EL PROCEDIMIENTO SIRVE PARA LA FABRICACION DE UN VARISTOR, QUE TIENE UN CUERPO DE RESISTENCIA CILINDRICA (1) FORMADO POR UN MATERIAL DE OXIDO METALICO, ASI COMO DOS ELECTRODOS (2, 3) COLOCADOS CADA UNO SOBRE DOS SUPERFICIES FRONTALES, QUE SON PARALELAS ENTRE SI, DEL CUERPO DE RESISTENCIA CILINDRICO (1). EN UNA PRIMERA ETAPA DEL PROCEDIMIENTO SE COLOCA SOBRE AMBAS SUPERFICIES FRONTALES UNA CAPA DE MATERIAL DE ELECTRODOS HASTA QUE SE FORME UN BORDE EXTERNO (9). EN UNA SEGUNDA ETAPA DEL PROCEDIMIENTO SE RETIRA DE LOS ELECTRODOS UN ANILLO (4) QUE TIENE UNA ANCHURA DE APROXIMADAMENTE 10 A 500 MI M Y QUE SE HA LLEVADO HASTA LA SUPERFICIE FRONTAL DEL CUERPO DE RESISTENCIA (1) Y QUE ESTA LIMITADO POR EL BORDE EXTERNO (9), O SE BISELAN (5 '') EL CUERPO DE RESISTENCIA (1) Y ELECTRODOS EN EL BORDE EXTERNO. EL PROCEDIMIENTO HACE POSIBLE UNA FABRICACION SENCILLA Y ECONOMICA DE UN VARISTOR.
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公开(公告)号：AT156627T
公开(公告)日：1997-08-15
申请号：AT93108622
申请日：1993-05-28
Applicant: ABB RESEARCH LTD
Inventor： GREUTER FELIX DR , SCHUELER CLAUS DR , STRUEMPLER RALF DR
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公开(公告)号：DE19510100A1
公开(公告)日：1996-09-26
申请号：DE19510100
申请日：1995-03-20
Applicant: ABB RESEARCH LTD
Inventor： GREUTER FELIX DR , KLUGE-WEISS PETRA DR , NIEMEYER LUTZ DR , PERDONCIN FRANCESCO DR , STRUEMPLER RALF DR
Abstract: The resistor (1) has an electric resistor body (5) arranged between two contact terminals. The resistor body (5) is made of a connector material with a polymer matrix and an electrically conductive filler embedded in the matrix. The filer is in the form of a powder with particles whose average diameter is greater than 1 micron, preferably greater than 10 microns. The filler is a material which is harder and more resistant to oxidation than soot or silver. The resistor (1) is esp. used in a device for limiting and/or switching current. The resistor (1) is associated with a deforming arrangement (4) to elastically deform its resistor body (5). Upon a trigger signal (6) during operation of the device, the deforming arrangement (4) elastically changes the shape of the resistor body (5).
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公开(公告)号：DE4232969A1
公开(公告)日：1994-04-07
申请号：DE4232969
申请日：1992-10-01
Applicant: ABB RESEARCH LTD
Inventor： DEMARMELS ANTON DR , GREUTER FELIX DR , STRUEMPLER RALF DR
IPC: H01C7/02
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