CN105390220A - Alternating-current resistor structure - Google Patents
Alternating-current resistor structure Download PDFInfo
- Publication number
- CN105390220A CN105390220A CN201510895960.3A CN201510895960A CN105390220A CN 105390220 A CN105390220 A CN 105390220A CN 201510895960 A CN201510895960 A CN 201510895960A CN 105390220 A CN105390220 A CN 105390220A
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- Prior art keywords
- resistance
- resistor
- adopts
- porcelain
- alternating
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C13/00—Resistors not provided for elsewhere
- H01C13/02—Structural combinations of resistors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/01—Mounting; Supporting
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Details Of Resistors (AREA)
Abstract
The invention discloses an alternating-current resistor structure. The alternating-current resistor structure is structurally characterized in that resistor elements are mounted on a mounting plate or a cylindrical bracket; the resistor elements are winding type resistor elements or adopt metal foil resistor structures; resistor materials of the winding type resistor elements are nickel based precision electrical resistance alloy materials; a base material of the mounting plate is a low-dielectric-loss and high-insulation resistance plate; resistors on the mounting plate are connected to form a flat lead wire; the mounting plate has four resistance lead-out ends; and resistance values are led out on the same plane by adopting a current end and a potential end. The alternating-current resistor structure has the technical effects that an alternating-current standard resistor can meet requirements of technical parameters required for measurement and transmission of alternating-current resistance values; and distributed capacitance and distributed inductance are reduced in structural design, additional influence quantity generated by change of the alternating-current resistance values along with a frequency is minimized, and minimal influence quantity caused by the frequency is increased.
Description
Technical field
The present invention relates to technical field of electronic components, for electromagnetic measurement passes the demarcation of measuring to the amount of resistance value, the amount comprising alternating current resistance passes, and is specially a kind of AC resistance device structure.
Background technology
Resistance value is in amount biography process, and except the technical characteristic that DC Standard Resistor should have, remain the impact of the idle component had at resistor, its influence amount changes along with the change of frequency thereupon.The development of science and technology, pass requirement to the amount of resistance value more and more higher, the amount especially under exchange status passes the emphasis becoming modern measurement and test technology, and the amount bringing alternating current resistance passes system, and this patent is the correlation technique of specification AC resistance device and launches.
A. c. standard resistor affects the principal element of quality except the due technology essential factor of D.C. resistance, distributed capacitance, residual inductance plays a major role, namely there is kelvin effect and eddy current loss in its physical angle analysis, the influence amount occurred for different resistance is relevant with resistance size, frequency is relevant, structurally must take into full account this relative influence amount for this reason.
Summary of the invention
The object of the present invention is to provide a kind of AC resistance device structure, take effective combining structure, make alternating current resistance close to true, in the frequency range of regulation, variable quantity is minimum, reaches best quality.
The technical solution used in the present invention is as follows: a kind of AC resistance device structure, be made up of built with AC resistance mounting panel a metal shell, metal shell has function of shielding, it is characterized in that: resistive element is arranged on mounting panel or column type support, described resistive element is Wound-rotor type resistive element or adopts metal foil resistor structure; Described mounting panel base material is the plate of low dielectric loss, high insulation resistance, and the resistance on this mounting panel connects for platypelloid type wire, has two resistor lead-out ends, adopts current terminal and potential end in one plane to draw.
Mounting panel of the present invention or column type support are engineering plastics, the structure of the plate or column type adopting polytetrafluoroethylene, poly-maple, high frequency porcelain material to make.
Column type support of the present invention adopts high frequency porcelain, soaks silicone oil before high frequency porcelain uses after high-temperature process, at pipe two end of cylindrical structure respectively with the connecting line of silver-plated copper ring as resistor and the exit of resistance value.
Cylindrical structure column type material of the present invention also optional artificial mica, in the junction of pipe two end will by dress plane becket, as the tie point of multiply parallel resistance and the lead-out wire of resistance value; The lead-out wire of resistance adopts the wire with function of shielding.
The resistance material of Wound-rotor type resistive element of the present invention is Ni-based precision electrical resistance alloy material, and the resistance of Wound-rotor type resistive element is divided into high value resistor element, medium resistance element, low resistance element, and different resistance element winding method is different; The winding method of described high value resistor element be the effective length of resistance material by a few decile, segmentation is equidirectional around on porcelain plate, porcelain tube, the winding method of described middle valued resistor be the effective length of resistance material to tearing open, Double-wire parallel wound is on porcelain plate, porcelain tube; The winding method of described low resistance resistance is that resistance material can select flat type resistive band, and effective length to tearing open, Double-wire parallel wound is on porcelain plate, porcelain tube.
Resistive element of the present invention adopts metal foil resistor structure, mainly nickel-base alloy, and paper tinsel is pasted onto on porcelain plate, and metal forming is attached to porcelain tube carries out photoetching meets the requirements of resistance, and resistance material and resistance skeleton are that not close is fixed simultaneously.
Resistive element on mounting panel of the present invention, little valued resistor adopts parallel combination, and high resistance measurement adopts the face of resistance to adopt equidistant connection, and medium resistance series-parallel connection connects.
Resistive element on column type support of the present invention, adopts wire-wound resistor, winding method be two-wire punching around.
Technique effect of the present invention is: a. c. standard resistor of the present invention, can reach the technical parameter required for the alternating current resistance amount of carrying out biography; It reduces distributed capacitance and distributed inductance in structural design, reaches the added influence amount that alternating current resistance produces with frequency change and reaches minimum value, promote the minimum influence amount caused by frequency.
Accompanying drawing explanation
Fig. 1 is mounting plates structure schematic diagram of the present invention.
Fig. 2 is column type supporting structure schematic diagram of the present invention.
A () is column type support front view, (b) is column type support left view.
In the drawings, 1, resistive element, 2, high frequency porcelain, 3, silver-plated copper ring.
Embodiment
Resistive element of the present invention is arranged on mounting panel or post, consider that product is used in ac parameter state, so mounting panel has following technical characteristic: it is little that mounting panel or post must have dielectric loss, the engineering plastics that insulation property are high, adopt polytetrafluoroethylene, gather the structure of the plate or column type that the material such as maple, high frequency porcelain is made.The influence amount of the distributed constant that minimizing mounting panel or post cause.Resistive element mounting means: resistive element installs overall structure on a mounting board, main consideration distributed capacitance, the influence amount of residual inductance, comprise: draw the lumped capacity of terminal element, the inductance of lead-out wire and the distributed capacitance between resistive element and shell, alternating current resistance adds that its AC equivalent resistance value of influence amount (i.e. imaginary part) caused with frequency change by distribution electric parameter is by DC resistance:
The variable of alternating current resistance and frequency, it is relevant that distributed capacitance participates in inductance.Low resistance alternating current resistance, increases with frequency and reduces, and now main CR plays a major role, can adjusting resistance and the distance of shield direction for large resistance alternating current resistance, changes equivalent distributed capacitance and improves influence amount.
About mounting panel, as shown in Figure 1, the base material of mounting panel is low dielectric loss, the plate of high insulation resistance, the principal character of this mounting panel is that resistance connects for platypelloid type wire, reduces kelvin effect, A, B bis-end be resistor lead-out ends, adopt current terminal and potential end in one plane to draw.Resistance connected mode: little valued resistor adopts parallel combination, high resistance measurement adopts the face of resistance to adopt equidistant connection, and medium resistance series-parallel connection connects.
About column type support, as shown in Figure 2, high frequency porcelain can be adopted by the material of cylindrical structure cylindrical structure, this high frequency porcelain 2 soaks silicone oil after high-temperature process before use, reduce the dielectric loss that steam causes, at pipe two end respectively with the connecting line of silver-plated copper ring 3 as resistor and exit A, B of resistance value.Cylindrical structure is applicable to wire-wound resistor, winding method be two-wire punching around, its AC characteristic making resistance is good, be specially adapted to middle resistance and low resistance, each nominal value resistance can adopt several resistor coupled in parallel according to technical requirement, adjusting resistance reaches the requirement of corresponding AC resistance accuracy class, the use power of resistance of simultaneously increasing exchanges.Column type material is optional artificial mica also, in the junction of pipe two end will by dress plane becket, as the tie point of multiply parallel resistance and the lead-out wire of resistance value.The lead-out wire of resistance must adopt the wire with function of shielding.
About resistive element, the resistive element in invention has distributed capacitance, residual inductance, the technical characteristic that the influence amount of kelvin effect eddy current to resistance value is little.Technical characteristic 1, wire resistor element, its resistance material of Wound-rotor type resistive element is Ni-based precision electrical resistance alloy material, the column type of frame configuration, template two kinds.The resistance of resistive element is divided into high value resistor element, medium resistance element, low resistance element, and different resistance element winding method is all different.The winding method of high resistance measurement: the effective length of resistance material is by a few decile, and segmentation is equidirectional around on porcelain plate, porcelain tube, is minimum to make the influence amount of equivalent electric capacity; The winding method of middle valued resistor: the effective length of resistance material is to tearing open, and Double-wire parallel wound, on porcelain plate, porcelain tube, makes it distributed capacitance and residual inductance amount compensates, and make it alternating current resistance with frequency change, and its change in resistance amount is little; The winding method of low resistance resistance: resistance material can select flat type resistive band, effective length to tearing open, Double-wire parallel wound, on porcelain plate, porcelain tube, reduces the influence amount of kelvin effect and residual capacitance.Technical characteristic 2: adopt metal foil resistor structure, the technical characteristics of metal thin film resistor is distributed capacitance, residual inductance, kelvin effect and vortes interference little, mainly nickel-base alloy, paper tinsel is pasted onto on porcelain plate, metal forming is attached to porcelain tube carries out photoetching meets the requirements of resistance, resistance material and resistance skeleton are that not close is fixed simultaneously, variations in temperature can not produce two kinds of material expansion coefficient different values and affect the plastic deformation of resistance material, and affect temperature coefficient value, so the temperature coefficient value of metal foil resistor is directly determined by metallic resistance material and resistance manufacture craft.
About shielding construction, interchange standard resistor is equipped with ramp by a metal shell built with AC resistance mounting panel and metal shell and forms.A metal shell plays function of shielding simultaneously.There is distributed capacitance between metal shell and resistance mounting plate, and capacitive leakage changes with potential difference between the two, fixed capacity leaks the ratio of the electric current flowing into or flow out resistance, and guarantee alternating current resistance is constant.One: exchange standard resistor internal resistance and connect employing grading shield.Exchange some sections of resistance in standard resistor and connect employing grading shield, every section of shielding imposes the midpoint potential of corresponding section, the distributed capacitance of every corresponding section makes angular difference very little, the corresponding minimizing of difference of alternating current-direct current resistance, this grading shield is not only suitable for interchange standard resistor, is also suitable for decimal system a. c. resistance box simultaneously.This technical characteristic reduces capacitive by equipotential to leak, and namely increases resistance quantity, reduce the resistance of single resistance, reduce and leak.Its two: a. c. standard resistor shielding exchanges between standard resistor metal shell and resistance mounting plate a fixing distributed capacitance, resistance mounting plate to be connected with terminal on panel by plain conductor also has distributed capacitance, panel also there is distributed capacitance between terminal, this distributed capacitance and residual inductance all can affect alternating current resistance, and the poor position between alterating and direct current resistance.
Exchanging standard resistor is not use under single-frequency, and the change of frequency of utilization, makes distributed electrical capacity also change thereupon, thus affects alternating current resistance.Problem solves the minimizing of distributed electrical capacity and constant.Structurally take into full account and keep certain space between shell four perisporium and resistance mounting plate, on resistance mounting plate, to adopt current terminal voltage end to be that same node shielded conductor is drawn out to the Connection Block with function of shielding upper outside for the exit of resistance value, ramp in outer panels must adopt the device with function of shielding, high-pressure side and low-pressure end will maintain a certain distance, and have radome on terminal.
Claims (8)
1. an AC resistance device structure, be made up of built with AC resistance mounting panel a metal shell, metal shell has function of shielding, it is characterized in that: resistive element is arranged on mounting panel or column type support, described resistive element is Wound-rotor type resistive element or adopts metal foil resistor structure; Described mounting panel base material is the plate of low dielectric loss, high insulation resistance, and the resistance on this mounting panel connects for platypelloid type wire, has four resistor lead-out ends, adopts current terminal and potential end in one plane to draw.
2. a kind of AC resistance device structure according to claim 1, is characterized in that: described mounting panel or column type support are engineering plastics, the structure of the plate or column type adopting polytetrafluoroethylene, poly-maple, high frequency porcelain material to make.
3. a kind of AC resistance device structure according to claim 2, it is characterized in that: described column type support adopts high frequency porcelain, silicone oil is soaked after high-temperature process, at pipe two end of cylindrical structure respectively with the connecting line of silver-plated copper ring as resistor and the exit of resistance value before high frequency porcelain uses.
4. a kind of AC resistance device structure according to claim 3, it is characterized in that: described cylindrical structure column type material also optional artificial mica, in the junction of pipe two end will by dress plane becket, as the tie point of multiply parallel resistance and the lead-out wire of resistance value; The lead-out wire of resistance adopts the wire with function of shielding.
5. a kind of AC resistance device structure according to claim 1, it is characterized in that: the resistance material of described Wound-rotor type resistive element is Ni-based precision electrical resistance alloy material, the resistance of Wound-rotor type resistive element is divided into high value resistor element, medium resistance element, low resistance element, different resistance element winding method is different; The winding method of described high value resistor element be the effective length of resistance material by a few decile, segmentation is equidirectional around on porcelain plate, porcelain tube, the winding method of described middle valued resistor be the effective length of resistance material to tearing open, Double-wire parallel wound is on porcelain plate, porcelain tube; The winding method of described low resistance resistance is that resistance material can select flat type resistive band, and effective length to tearing open, Double-wire parallel wound is on porcelain plate, porcelain tube.
6. a kind of AC resistance device structure according to claim 1, it is characterized in that: described resistive element adopts metal foil resistor structure, mainly nickel-base alloy, paper tinsel is pasted onto on porcelain plate, metal film is attached to and porcelain tube carries out photoetching meets the requirements of resistance, and resistance material and resistance skeleton are that not close is fixed simultaneously.
7. a kind of AC resistance device structure according to claim 1, is characterized in that: the resistive element on described mounting panel, and little valued resistor adopts parallel combination, and high resistance measurement adopts between resistance and adopts equidistant connection, and medium resistance series-parallel connection connects.
8. a kind of AC resistance device structure according to claim 1, is characterized in that: the resistive element on column type support of the present invention, adopts wire-wound resistor, winding method be two-wire punching around.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510895960.3A CN105390220A (en) | 2015-12-08 | 2015-12-08 | Alternating-current resistor structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510895960.3A CN105390220A (en) | 2015-12-08 | 2015-12-08 | Alternating-current resistor structure |
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| CN105390220A true CN105390220A (en) | 2016-03-09 |
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| CN201510895960.3A Pending CN105390220A (en) | 2015-12-08 | 2015-12-08 | Alternating-current resistor structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110400668A (en) * | 2018-04-24 | 2019-11-01 | 莫列斯有限公司 | Electronic component |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110400668A (en) * | 2018-04-24 | 2019-11-01 | 莫列斯有限公司 | Electronic component |
| US11037895B2 (en) | 2018-04-24 | 2021-06-15 | Molex, Llc | Electronic component |
| CN110400668B (en) * | 2018-04-24 | 2022-02-08 | 莫列斯有限公司 | Electronic component |
| CN114582578A (en) * | 2018-04-24 | 2022-06-03 | 莫列斯有限公司 | Electronic component |
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Application publication date: 20160309 |