CN103852696A - Element voltage-withstand detection circuit, voltage-withstand test device and test method - Google Patents
Element voltage-withstand detection circuit, voltage-withstand test device and test method Download PDFInfo
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Abstract
The invention provides an element voltage-withstand detection circuit, a voltage-withstand test device and a test method. According to the element voltage-withstand detection circuit, a primary side winding of a transformer is connected with the mains supply, a secondary side winding of the transformer is divided two paths, namely a low-voltage output winding with voltage below 10 V and a high-voltage output winding with voltage of one or more kilovolts, the output of the high-voltage output winding with voltage of one or more kilovolts sequentially passes through a first filtering capacitor, a voltage doubling rectifying circuit ad a first current limiting resistor to form a first end M used for being connected with an element to be detected, the output of the low-voltage output winding with voltage below 10 V sequentially passes through a half-wave rectifying circuit, a third filtering capacitor, a second current limiting resistor and then is connected with a control end of a switch tube, the other two ends of the switch tube are respectively connected between the first end M and a grounding end, the control end of the switch tube is connected with the grounding end through a varistor, and an adjustable end of the varistor is also connected with the grounding end. The voltage-withstand test method is easy and convenient to operate, effective and low in cost.
Description
Technical field
The present invention relates to a kind of device withstand voltage field tests, be specifically related to a kind of device withstand voltage proving installation and method.
Background technology
In the time detecting components and parts withstand voltage, conventionally use special resistance test instrument, but resistance test instrument price also needs thousands of units at least, and be also unfavorable for carrying.So just there is the problem of cost height and detection efficiency.
Selecting suitable components and parts for circuit is very important work, whether can adapt to the occasion that will use if can just understand components and parts in use, not a very important job undoubtedly, for the suitable components and parts of the different choice of occasion, understand in advance the withstand voltage situation of components and parts, will contribute to the exploitation of subsequent product.But the price between components and parts Hi-pot Tester is very expensive, just need to provide a kind of easy, effectively, device withstand voltage method of testing that cost is low.
Summary of the invention
Based on this, be necessary to provide a kind of device withstand voltage testing circuit, pressure resistant testing device and method of testing, its provide a kind of easy, effectively, device withstand voltage method of testing that cost is low.
A kind of device withstand voltage testing circuit the invention provides, it comprises transformer, voltage doubling rectifing circuit, the first current-limiting resistance, the first filter capacitor, half-wave rectifying circuit, the 3rd filter capacitor, the second current-limiting resistance, rheostat and switching tube;
The former limit winding access civil power of described transformer, the inferior limit winding of described transformer is divided into the following low pressure output winding of 10V and kilovolt above High voltage output winding two-way, and the output of described kilovolt of above High voltage output winding is successively by being formed for connecing the first end of device under test after the first filter capacitor, voltage doubling rectifing circuit and the first current-limiting resistance;
The output of the following low pressure output of described 10V winding is successively by connecting the control end of described switching tube after half-wave rectifying circuit, the 3rd filter capacitor, the second current-limiting resistance, the another two ends of described switching tube connect respectively described first end and earth terminal, the control end of described switching tube connects described earth terminal by described rheostat, and described rheostatic adjustable end is also connected in earth terminal.
Wherein, described voltage doubling rectifing circuit comprises the first diode, the second diode, the 3rd diode and the 4th diode, the output of described kilovolt above High voltage output winding connects the positive pole of described the first diode and the negative pole of described the 3rd diode after by the first filter capacitor, the negative pole of described the first diode connects the positive pole of described the second diode, the negative pole of described the second diode connects one end of described the first current-limiting resistance, the positive pole of described the 3rd diode connects the negative pole of described the 4th diode, and the positive pole of described the 4th diode connects earth terminal.
The present invention also provides a kind of device withstand voltage pick-up unit, and it comprises transformer, voltage doubling rectifing circuit, the first current-limiting resistance, the first filter capacitor, half-wave rectifying circuit, the 3rd filter capacitor, the second current-limiting resistance, rheostat, switching tube, reometer and voltage table;
The former limit winding access civil power of described transformer, the inferior limit winding of described transformer is divided into the following low pressure output winding of 10V and kilovolt above High voltage output winding two-way, and the output of described kilovolt of above High voltage output winding is successively by being formed for connecing the first end M of device under test after the first filter capacitor, voltage doubling rectifing circuit and the first current-limiting resistance;
The output of the following low pressure output of described 10V winding is successively by connecting the control end of described switching tube after half-wave rectifying circuit, the 3rd filter capacitor, the second current-limiting resistance, the another two ends of described switching tube connect respectively described first end M and earth terminal, the control end of described switching tube connects described earth terminal by described rheostat, described rheostatic adjustable end is also connected in earth terminal, between described earth terminal and the second end N for connecing device under test, be connected described reometer, be describedly connected described voltage table for connecing between the first end M of device under test and described earth terminal.
Wherein, described voltage doubling rectifing circuit comprises the first diode, the second diode, the 3rd diode and the 4th diode, the output of described kilovolt above High voltage output winding connects the positive pole of described the first diode and the negative pole of described the 3rd diode after by the first filter capacitor, the negative pole of described the first diode connects the positive pole of described the second diode, the negative pole of described the second diode connects one end of described the first current-limiting resistance, the positive pole of described the 3rd diode connects the negative pole of described the 4th diode, and the positive pole of described the 4th diode connects earth terminal.
Based on said apparatus, the present invention also provides a kind of device withstand voltage method of testing, and it comprises the following steps:
Utilize transformer that civil power is converted to two-way output: a road is that the following low pressure output of 10V, another road are kilovolt above High voltage outputs; Described low pressure output is successively by the control end of connecting valve pipe after half-wave rectifying circuit, the 3rd filter capacitor, the second current-limiting resistance, the another two ends of described switching tube connect respectively described first end and earth terminal, the control end of described switching tube connects described earth terminal by described rheostat, and described rheostatic adjustable end is also connected in earth terminal; Described kilovolt of above High voltage output is connected in one end of device under test successively by forming first end after the first filter capacitor, voltage doubling rectifing circuit and the first current-limiting resistance, the second end connects the other end of device under test, between described earth terminal and the second end N, is connected reometer; Between first end and described earth terminal, be connected voltage table;
Resistance value is the resistance size of standardsizing rheostat from big to small;
What judge whether reometer show is the specified inverse current of device under test; If not, continue the size of standardsizing rheostat, until the demonstration of described reometer is the specified inverse current of device under test; If so, judge the withstand voltage of device under test according to the reading of voltage table;
Rheostatic resistance is adjusted to maximum.
Pressure resistant testing device of the present invention and method and test circuit, adopt easy components and parts resistance test circuit design, has the advantages such as small and exquisite, simple, reliable, only several little components and parts compositions, its volume is very little, conveniently carries, and cost is also only in ten yuan, very low.By tested components and parts are connected in circuit, and detect the withstand voltage of components and parts by reading the numerical value of voltage table, thereby can solve Cost Problems and the efficiency that need to bring with resistance test instrument.
Accompanying drawing explanation
Fig. 1 is electrical block diagram of the present invention.
Embodiment
For the ease of understanding the present invention, below with reference to relevant drawings, the present invention is described more fully.In accompanying drawing, provide preferred embodiment of the present invention.But the present invention can realize in many different forms, be not limited to embodiment described herein.On the contrary, providing the object of these embodiment is to make to the understanding of disclosure of the present invention more thoroughly comprehensively.
It should be noted that, when element is called as " being fixed on " another element, it can be directly on another element or also can have an element placed in the middle.When an element is considered to " connection " another element, it can be directly connected to another element or may have centering elements simultaneously.
Unless otherwise defined, all technology that use are herein identical with the implication that belongs to the common understanding of those skilled in the art of the present invention with scientific terminology.The term using in instructions of the present invention herein, just in order to describe the object of specific embodiment, is not intended to be restriction the present invention.Term as used herein " and/or " comprise one or more relevant Listed Items arbitrarily with all combinations.
Refer to Fig. 1, a kind of device withstand voltage testing circuit that the present embodiment provides, it comprises transformer T1, voltage doubling rectifing circuit 10, the first current-limiting resistance R1, the first filter capacitor C1, half-wave rectifying circuit 20, the 3rd filter capacitor C3, the second current-limiting resistance R3, rheostat RP1 and switching tube Q1; The former limit winding access civil power (220V) of described transformer T, the inferior limit winding of described transformer T1 is divided into the following low pressure output winding of 10V and kilovolt above High voltage output winding two-way, and the output of described kilovolt of above High voltage output winding is successively by being formed for connecing the first end M of device under test after the first filter capacitor C1, voltage doubling rectifing circuit 10 and the first current-limiting resistance R1; The output of the following low pressure output of described 10V winding is successively by connecting the control end of described switching tube Q1 after half-wave rectifying circuit 20, the 3rd filter capacitor C3, the second current-limiting resistance R2, the another two ends of described switching tube Q1 connect respectively described first end M and earth terminal N`, the control end of described switching tube Q1 connects described earth terminal N` by described rheostat RP1, and the adjustable end of described rheostat RP1 is also connected in earth terminal N`.
As shown in Figure 1, for to protection control circuit, fuse F1 can connect in the loop of the former limit of transformer T winding access civil power.In addition can be in this loop tandem tap part S1, for handled easily personnel control voltage-withstand test.In addition in order to reduce the high frequency interference of voltage doubling rectifing circuit 10 output voltages, also pass through the second filter capacitor C2 ground connection in the output of voltage doubling rectifing circuit 10.
In the above-described embodiments, combine the device withstand voltage test circuit that utilize suitable component parameter just can form simply, cost is low, easy to operate, is easy to carry about with one by simple components and parts.Its principle of work is: as shown in Figure 1, above-mentioned voltage-withstand test circuit is combined with reometer A1 and voltage table V1, series voltage Table V 1 between the node that the first current-limiting resistance R1 is connected with the first end M for connecing device under test and earth terminal N`, and between the second end N for connecing device under test and earth terminal N` series current Table A 1, then, starting switch S1, in the time measuring, tested components and parts are connected between first end M and the second end N, the voltage of civil power 220V changes two-way into by transformer, one tunnel produces kilovolt high pressure (such as 1000V) successively after filtering, rectification, after current limliting, can produce corresponding high pressure and be loaded into the two ends of components and parts to be measured at A point, be used for testing withstand voltage situation, during for the ease of test, regulate the magnitude of voltage that is carried in components and parts to be measured two ends, utilize another road of transformer to produce low voltage control voltage successively by rectification, filtering, after current limliting, be loaded into the control end of switching tube Q1, and because the control end of switching tube Q1 connects earth terminal N` by rheostat RP1, can regulate the magnitude of voltage of controlled loading at components and parts to be measured two ends by the resistance size that regulates transformer RP1, be that the magnitude of voltage that in control chart 1, A is ordered changes in preset range, preferably preset range is 4V-1400V.Standardsizing rheostat RP1 resistance from big to small, the control end current potential of switching tube Q1 declines, and the current potential of first end M rises, until reometer A1 indicates the specified inverse current of measured device, the voltage of at this moment voltage table V1 indication is the reverse withstand voltage of components and parts; After being finished, rheostat RP1 resistance is adjusted to maximum at every turn, makes M point voltage be transferred to 4V, prevent that Keep Clear-High Voltage.So, just can detect very rapidly the withstand voltage of components and parts, solve detection efficiency that the special Hi-pot Tester of the withstand voltage needs of components and parts brings and the problem of testing cost of detecting.
On the basis of above-described embodiment, above-mentioned voltage doubling rectifing circuit 10 comprises the first diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4, the output of described kilovolt above High voltage output winding connects the positive pole of described the first diode D1 and the negative pole of described the 3rd diode after by the first filter capacitor C1, the negative pole of described the first diode D1 connects the positive pole of described the second diode D2, the negative pole of described the second diode D2 connects one end of described the first current-limiting resistance R1, the other end of described the first current-limiting resistance R1 connects first end M, the positive pole of described the 3rd diode D3 connects the negative pole of described the 4th diode D4, the plus earth of described the 4th diode.
On the basis of above-described embodiment, above-mentioned half-wave rectifying circuit 20 adopts the 5th diode D5, the output of the following low pressure output of the 10V winding on T1 the limit of anodal connection transformer of described the 5th diode D5, the negative pole of described the 5th diode D5 connects one end of the second current-limiting resistance R2, the control end of the other end connecting valve pipe Q1 of described the second current-limiting resistance R2.
On the basis of above-described embodiment, above-mentioned switching tube Q1 adopts NPN type triode, and its collector connects the other end of described current-limiting resistance R2, and its collector and emitter connects respectively described first end M and earth terminal N`.Certainly the invention is not restricted to the switching tube of this type, such as adopting insulated-gate type metal-oxide-semiconductor, or positive-negative-positive triode, its annexation also will be adjusted accordingly in the time of concrete application so, but main connected mode remains " control end of the second current-limiting resistance R2 connecting valve pipe Q1, the another two ends of switching tube Q1 connect respectively first end M and earth terminal N` ".
Based on above-described embodiment, the present invention also provides a kind of device withstand voltage pick-up unit, it comprises above-mentioned device withstand voltage testing circuit, reometer A1 and voltage table V1, concrete connected mode is: the former limit winding access civil power (220V) of above-mentioned transformer T, the inferior limit winding of described transformer T1 is divided into the following low pressure output winding of 10V and kilovolt above High voltage output winding two-way, and the output of described kilovolt of above High voltage output winding is successively by being formed for connecing the first end M of device under test after the first filter capacitor C1, voltage doubling rectifing circuit 10 and the first current-limiting resistance R1; The output of the following low pressure output of described 10V winding is successively by connecting the control end of described switching tube Q1 after half-wave rectifying circuit 20, the 3rd filter capacitor C3, the second current-limiting resistance R2, the another two ends of described switching tube Q1 connect respectively described first end M and earth terminal N`, the control end of described switching tube Q1 connects described earth terminal N` by described rheostat RP1, and the adjustable end of described rheostat RP1 is also connected in earth terminal.Between described earth terminal N` and the second end N for connecing device under test, be connected described reometer A1, be describedly connected described voltage table V1 for connecing between the first end M of device under test and described earth terminal N`.
Based on above-described embodiment, the present invention also provides a kind of device withstand voltage method of testing, and it comprises the following steps:
Utilize transformer that civil power is converted to two-way output: a road is that the following low pressure output of 10V, another road are kilovolt above High voltage outputs; Described low pressure output is successively by the control end of connecting valve pipe after half-wave rectifying circuit, the 3rd filter capacitor, the second current-limiting resistance, the another two ends of described switching tube connect respectively described first end M and earth terminal N`, the control end of described switching tube connects described earth terminal by described rheostat, and described rheostatic adjustable end is also connected in earth terminal; Described kilovolt of above High voltage output is connected in one end of device under test successively by forming first end M after the first filter capacitor, voltage doubling rectifing circuit and the first current-limiting resistance, the second end N connects the other end of device under test, between described earth terminal and the second end N, is connected reometer; Between first end M and described earth terminal, be connected voltage table;
Resistance value is the resistance size of standardsizing rheostat from big to small;
What judge whether reometer show is the specified inverse current of device under test; If not, continue the size of standardsizing rheostat, until the demonstration of described reometer is the specified inverse current of device under test; If so, judge the withstand voltage of device under test according to the reading of voltage table, on voltage table, reading now can be used as the withstand voltage of device under test;
Rheostatic resistance is adjusted to maximum.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (5)
1. a device withstand voltage testing circuit, is characterized in that: comprise transformer, voltage doubling rectifing circuit, the first current-limiting resistance, the first filter capacitor, half-wave rectifying circuit, the 3rd filter capacitor, the second current-limiting resistance, rheostat and switching tube;
The former limit winding access civil power of described transformer, the inferior limit winding of described transformer is divided into the following low pressure output winding of 10V and kilovolt above High voltage output winding two-way, and the output of described kilovolt of above High voltage output winding is successively by being formed for connecing the first end of device under test after the first filter capacitor, voltage doubling rectifing circuit and the first current-limiting resistance;
The output of the following low pressure output of described 10V winding is successively by connecting the control end of described switching tube after half-wave rectifying circuit, the 3rd filter capacitor, the second current-limiting resistance, the another two ends of described switching tube connect respectively described first end and earth terminal, the control end of described switching tube connects described earth terminal by described rheostat, and described rheostatic adjustable end is also connected in earth terminal.
2. a kind of device withstand voltage testing circuit according to claim 1, it is characterized in that, described voltage doubling rectifing circuit comprises the first diode, the second diode, the 3rd diode and the 4th diode, the output of described kilovolt above High voltage output winding connects the positive pole of described the first diode and the negative pole of described the 3rd diode after by the first filter capacitor, the negative pole of described the first diode connects the positive pole of described the second diode, the negative pole of described the second diode connects one end of described the first current-limiting resistance, the positive pole of described the 3rd diode connects the negative pole of described the 4th diode, the positive pole of described the 4th diode connects earth terminal.
3. a device withstand voltage pick-up unit, it is characterized in that, comprise transformer, voltage doubling rectifing circuit, the first current-limiting resistance, the first filter capacitor, half-wave rectifying circuit, the 3rd filter capacitor, the second current-limiting resistance, rheostat, switching tube, reometer and voltage table;
The former limit winding access civil power of described transformer, the inferior limit winding of described transformer is divided into the following low pressure output winding of 10V and kilovolt above High voltage output winding two-way, and the output of described kilovolt of above High voltage output winding is successively by being formed for connecing the first end M of device under test after the first filter capacitor, voltage doubling rectifing circuit and the first current-limiting resistance;
The output of the following low pressure output of described 10V winding is successively by connecting the control end of described switching tube after half-wave rectifying circuit, the 3rd filter capacitor, the second current-limiting resistance, the another two ends of described switching tube connect respectively described first end M and earth terminal, the control end of described switching tube connects described earth terminal by described rheostat, described rheostatic adjustable end is also connected in earth terminal, between described earth terminal and the second end N for connecing device under test, be connected described reometer, be describedly connected described voltage table for connecing between the first end M of device under test and described earth terminal.
4. a kind of device withstand voltage pick-up unit according to claim 3, it is characterized in that, described voltage doubling rectifing circuit comprises the first diode, the second diode, the 3rd diode and the 4th diode, the output of described kilovolt above High voltage output winding connects the positive pole of described the first diode and the negative pole of described the 3rd diode after by the first filter capacitor, the negative pole of described the first diode connects the positive pole of described the second diode, the negative pole of described the second diode connects one end of described the first current-limiting resistance, the positive pole of described the 3rd diode connects the negative pole of described the 4th diode, the positive pole of described the 4th diode connects earth terminal.
5. the device withstand voltage method of testing based on device described in claim 3 or 4, is characterized in that, comprises the following steps:
Utilize transformer that civil power is converted to two-way output: a road is that the following low pressure output of 10V, another road are kilovolt above High voltage outputs; Described low pressure output is successively by the control end of connecting valve pipe after half-wave rectifying circuit, the 3rd filter capacitor, the second current-limiting resistance, the another two ends of described switching tube connect respectively described first end and earth terminal, the control end of described switching tube connects described earth terminal by described rheostat, and described rheostatic adjustable end is also connected in earth terminal; Described kilovolt of above High voltage output is connected in one end of device under test successively by forming first end after the first filter capacitor, voltage doubling rectifing circuit and the first current-limiting resistance, the second end connects the other end of device under test, between described earth terminal and the second end N, is connected reometer; Between first end and described earth terminal, be connected voltage table;
Resistance value is the resistance size of standardsizing rheostat from big to small;
What judge whether reometer show is the specified inverse current of device under test; If not, continue the size of standardsizing rheostat, until the demonstration of described reometer is the specified inverse current of device under test; If so, judge the withstand voltage of device under test according to the reading of voltage table;
Rheostatic resistance is adjusted to maximum.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210510977.9A CN103852696A (en) | 2012-11-30 | 2012-11-30 | Element voltage-withstand detection circuit, voltage-withstand test device and test method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210510977.9A CN103852696A (en) | 2012-11-30 | 2012-11-30 | Element voltage-withstand detection circuit, voltage-withstand test device and test method |
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| CN103852696A true CN103852696A (en) | 2014-06-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111929540A (en) * | 2019-05-13 | 2020-11-13 | 上海海拉电子有限公司 | Voltage withstand measurement circuit and method for switching device |
| CN112731084A (en) * | 2020-12-28 | 2021-04-30 | 北京深思数盾科技股份有限公司 | Transformer testing device and testing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2398641Y (en) * | 1999-01-19 | 2000-09-27 | 广州擎天实业有限公司 | Withstand voltage testing instrument |
| CN2837857Y (en) * | 2005-10-27 | 2006-11-15 | 比亚迪股份有限公司 | Transformer winding tester |
| CN201974504U (en) * | 2010-12-20 | 2011-09-14 | 德州学院 | Nondestructive withstand voltage tester |
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2012
- 2012-11-30 CN CN201210510977.9A patent/CN103852696A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2398641Y (en) * | 1999-01-19 | 2000-09-27 | 广州擎天实业有限公司 | Withstand voltage testing instrument |
| CN2837857Y (en) * | 2005-10-27 | 2006-11-15 | 比亚迪股份有限公司 | Transformer winding tester |
| CN201974504U (en) * | 2010-12-20 | 2011-09-14 | 德州学院 | Nondestructive withstand voltage tester |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111929540A (en) * | 2019-05-13 | 2020-11-13 | 上海海拉电子有限公司 | Voltage withstand measurement circuit and method for switching device |
| CN111929540B (en) * | 2019-05-13 | 2023-08-11 | 上海海拉电子有限公司 | Voltage withstand measuring circuit and method for switching device |
| CN112731084A (en) * | 2020-12-28 | 2021-04-30 | 北京深思数盾科技股份有限公司 | Transformer testing device and testing method |
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Application publication date: 20140611 |