CN214669416U - 20kV alternating current-direct current two-in-one ultrahigh voltage withstand voltage tester - Google Patents
20kV alternating current-direct current two-in-one ultrahigh voltage withstand voltage tester Download PDFInfo
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- CN214669416U CN214669416U CN202120590257.2U CN202120590257U CN214669416U CN 214669416 U CN214669416 U CN 214669416U CN 202120590257 U CN202120590257 U CN 202120590257U CN 214669416 U CN214669416 U CN 214669416U
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- 230000003750 conditioning effect Effects 0.000 claims abstract description 5
- 238000002955 isolation Methods 0.000 claims description 23
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- 238000012360 testing method Methods 0.000 abstract description 18
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Abstract
The utility model provides a 20kV alternating current-direct current two unification superhigh pressure withstand voltage tester, includes: the SPWM inversion module is connected with the low-voltage direct-current bus and used for converting direct-current voltage into alternating-current voltage; the output end of the step-up transformer is connected with a high-voltage switching isolator capable of realizing alternating current and direct current switching; the sampling conditioning module is used for applying the high voltage output by the booster transformer to an object to be measured; the external of the embedded main control module is connected with a human-computer interface module and a data interconnection module, and the output end of the embedded main control module is connected with the input end of the SPWM inversion module. The alternating current-direct current two-in-one ultrahigh voltage withstand voltage tester can be used for alternating current withstand voltage testing and direct current withstand voltage testing, the purpose of alternating current-direct current two-in-one is achieved, operation is convenient, and meanwhile cost is saved.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a withstand voltage tester, concretely relates to two unification superhigh pressure withstand voltage testers of 20kV alternating current-direct current.
[ background of the invention ]
Electronic and electrical products such as household appliances (refrigerators, air conditioners, kitchens and bathrooms, small household appliances), laboratory appliances (test boxes and instruments and meters), information equipment (computers, mobile phones and chargers), new energy vehicles (electric vehicles and electric coaches), electronic components and products closely related to human use all need to ensure the use safety. The withstand voltage test is used as the core of safety detection, and all the standards, authentication and offline detection need forced detection. With the progress of the technology, the requirement of the voltage-resistant grade is higher and higher, and the requirement of the voltage-resistant test of 20kV grade is higher and higher. However, in the related field, there is no ac/dc integrated 20kV withstand voltage tester, and during testing, a user needs to purchase two ac withstand voltage testers and dc withstand voltage testers with separate functions, or connect ac and dc to different interfaces respectively for testing, which brings trouble to operation and increases testing cost.
[ Utility model ] content
In order to solve the problem, the utility model provides a two unification superhigh pressure withstand voltage testers of 20kV alternating current-direct current, test voltage reaches 20kV, can carry out alternating current withstand voltage test, also can carry out direct current withstand voltage test, reaches the purpose of two unifications of alternating current-direct current, has practiced thrift the cost when convenient operation.
The utility model discloses a realize through following technical scheme, provide a 20kV alternating current-direct current two unification superhigh pressure withstand voltage tester, include:
the SPWM inversion module is connected with the low-voltage direct-current bus and used for converting direct-current voltage into alternating-current voltage;
a step-up transformer for carrying out the signal that steps up with SPWM module output, a high-pressure switching isolator for realizing exchanging, direct current switch is connected to its output, and this high-pressure switching isolator includes: the output end of the second high-voltage isolation change-over switch is connected with an ultrahigh-voltage rectification module, the output end of the ultrahigh-voltage rectification module is connected with a third high-voltage isolation change-over switch, and the output ends of the first high-voltage isolation change-over switch and the third high-voltage isolation change-over switch are connected with a two-in-one output interface;
the sampling conditioning module is used for applying the high voltage output by the booster transformer to an object to be measured;
the external of the embedded main control module is connected with a human-computer interface module and a data interconnection module, and the output end of the embedded main control module is connected with the input end of the SPWM inversion module.
In particular, the internal circuit of the high-voltage switching isolator comprises: the transformer comprises a transformer, an ACW relay, a DCW relay and a diode, wherein the primary side of the transformer is connected with a power supply end, the ACW relay and the diode are connected in parallel at one end of the secondary side of the transformer, the DCW relay and a 1K resistor are connected in parallel at the output end of the diode, the 1K resistor and the output end of the ACW relay are connected in series to form a 300K resistor, the 300K resistor and the output end of the DCW relay are connected with the other end of the secondary side of the transformer, and a 300MEG resistor and a capacitor are connected in parallel between the output end of the DCW relay and the secondary side of the transformer.
In particular, two ends of the ACW relay and the DCW relay are respectively connected with a 100MEG resistor in parallel, and a 500 ohm resistor is connected between the diode and the 1k resistor in series.
In particular, the ACW relay contact can bear 45kV high voltage.
Particularly, a PID controller is arranged in the embedded main control module.
The utility model provides a 20kV alternating current-direct current two unification superhigh pressure withstand voltage tester switches the special design of isolator through the high pressure, can realize the effective isolation to the superhigh pressure, can make the same high-pressure interface on this superhigh pressure withstand voltage tester again, can export and exchange 20kV, also can export direct current 20kV, reach the purpose of two unifications of alternating current-direct current, practiced thrift the test cost in convenient operation.
[ description of the drawings ]
Fig. 1 is a block diagram of a 20kV ac/dc two-in-one ultra-high voltage withstand voltage tester of the present invention;
fig. 2 is the utility model relates to a 20kV alternating current-direct current two unification superhigh pressure withstand voltage tester medium-high voltage switches the internal circuit diagram of isolator.
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings.
Referring to fig. 1-2, the present invention provides a 20kV ac/dc two-in-one ultra-high voltage withstand voltage tester, which comprises:
the SPWM inversion module 1 is connected with the low-voltage direct-current bus and used for converting direct-current voltage into alternating-current voltage;
the step-up transformer 2 for boosting the signal output by the SPWM module, the output end of which is connected with a high-voltage switching isolator 3 for realizing AC and DC switching, the high-voltage switching isolator 3 comprises: the first high-voltage isolation change-over switch 4 and the second high-voltage isolation change-over switch 5 are connected in parallel with the output end of the boosting transformer 2, the output end of the second high-voltage isolation change-over switch 5 is connected with an ultrahigh-voltage rectifier module 6, the output end of the ultrahigh-voltage rectifier module 6 is connected with a third high-voltage isolation change-over switch 7, and the output ends of the first high-voltage isolation change-over switch 4 and the third high-voltage isolation change-over switch 7 are connected with a two-in-one output interface 8;
a sampling conditioning module 9 for applying the high voltage output by the step-up transformer 2 to the object to be measured;
the external of the embedded main control module 10 is connected with a human-computer interface module 11 and a data interconnection module 12, and the output end of the embedded main control module 10 is connected with the input end of the SPWM inversion module 1.
In particular, the internal circuit of the high-voltage switching isolator 3 comprises: the primary side of the transformer 31 is connected with a power supply end, the ACW relay 32 and the diode 34 are connected in parallel with one end of the secondary side of the transformer 31, the DCW relay 33 and a 1k resistor 35 are connected in parallel with the output end of the diode 34, the 1k resistor 35 and the output end of the ACW relay 32 are connected in series with a 300k resistor 36, the 300k resistor 36 and the output end of the DCW relay 33 are connected with the other end of the secondary side of the transformer 31, and a 300MEG resistor 37 and a capacitor are connected in parallel between the output end of the DCW relay 33 and the secondary side of the transformer 31; in the utility model discloses in, when the disconnection of ACW relay, DCW relay actuation, the circuit gets into half-wave rectification mode, and output direct current is withstand voltage, ACW relay actuation, DCW relay disconnection, the circuit gets into and exchanges the output mode, and output exchanges withstand voltage to ensure the same high voltage interface of this tester, can carry out the direct voltage test, can carry out the alternating voltage test again, practiced thrift the test cost when convenient operation.
In particular, in the dc withstand voltage mode, the two ends of the contact of the ACW relay 32 need to bear extra high voltage, in order to make the contact of the ACW relay bear the force, the two ends of the ACW relay 32 and the DCW relay 33 are respectively connected in parallel with a 100MEG resistor 38, and a 500 ohm resistor 39 is connected in series between the diode 34 and the 1k resistor 35.
Particularly, the ACW relay 32 contact can bear 45kV high pressure, and conventional high-voltage relay bears 20kV voltage at highest, consequently the utility model provides an ACW relay's bearing capacity is stronger, and the performance is more excellent.
Particularly, a PID controller is arranged in the embedded main control module 10, so that the stability of the output voltage can be guaranteed, and the test result can be further improved.
Working process or working principle:
firstly, a user determines the limit of test voltage and alarm current according to the rule corresponding to a product to be tested, and finishes editing of a test program through a man-machine interface module and a data interconnection module; and then the embedded main control module judges whether the test program is subjected to alternating current withstand voltage or direct current withstand voltage by calling the test program, drives the high-voltage switching isolator module to select an alternating current withstand voltage channel or a direct current withstand voltage channel, and after the switching is finished, drives the SPWM inverter module to output a programmable sinusoidal signal and finishes the boosting process through the boosting transformer.
When the alternating-current withstand voltage is output, the first high-voltage isolation change-over switch is closed, the second high-voltage isolation switch and the third high-voltage isolation switch are disconnected, and a high-voltage alternating-current signal is output;
when the direct-current withstand voltage is output, the second high-voltage isolation change-over switch and the third high-voltage isolation change-over switch are closed, the first high-voltage isolation change-over switch is disconnected, the ultrahigh-voltage rectification module is switched into a loop, and a high-voltage direct-current signal is output;
wherein, a PID controller is arranged in the embedded main control module to ensure the stability of the output voltage. And (3) obtaining the current in the loop through sampling, comparing the current with a threshold set by a user, giving out a qualified conclusion and an unqualified conclusion, and obtaining a test result.
Claims (5)
1. The utility model provides a 20kV alternating current-direct current two unification superhigh pressure withstand voltage tester which characterized in that includes:
the SPWM inversion module (1) is connected with the low-voltage direct-current bus and is used for converting direct-current voltage into alternating-current voltage;
the step-up transformer (2) is used for boosting the signal output by the SPWM module, the output end of the step-up transformer is connected with a high-voltage switching isolator (3) used for realizing alternating current and direct current switching, and the high-voltage switching isolator (3) comprises: the boost converter comprises a first high-voltage isolation change-over switch (4) and a second high-voltage isolation change-over switch (5) which are connected in parallel with the output end of a boost transformer (2), wherein the output end of the second high-voltage isolation change-over switch (5) is connected with an ultrahigh-voltage rectification module (6), the output end of the ultrahigh-voltage rectification module (6) is connected with a third high-voltage isolation change-over switch (7), and the output ends of the first high-voltage isolation change-over switch (4) and the third high-voltage isolation change-over switch (7) are connected with a two-in-one output interface (8);
the sampling conditioning module (9) is used for applying the high voltage output by the booster transformer (2) to an object to be tested;
the embedded main control module (10) is used for controlling signals collected by the sampling and conditioning module (9), the external of the embedded main control module is connected with the human-computer interface module (11) and the data interconnection module (12), and the output end of the embedded main control module (10) is connected with the input end of the SPWM inversion module (1).
2. The 20kV AC/DC two-in-one extra-high voltage withstand voltage tester according to claim 1, wherein the internal circuit of the high voltage switching isolator (3) comprises: the transformer-based power supply comprises a transformer (31), an ACW relay (32), a DCW relay (33) and a diode (34), wherein the primary side of the transformer (31) is connected with a power supply end, the ACW relay (32) and the diode (34) are connected in parallel with one end of the secondary side of the transformer (31), the DCW relay (33) and a 1k resistor (35) are connected in parallel with the output end of the diode (34), the 1k resistor (35) and the output end of the ACW relay (32) are connected in series to form a 300k resistor (36), the output ends of the 300k resistor (36) and the DCW relay (33) are connected with the other end of the secondary side of the transformer (31), and a 300MEG resistor (37) and a capacitor are connected in parallel between the output end of the DCW relay (33) and the secondary side of the transformer (31).
3. The 20kV alternating current-direct current two-in-one ultrahigh voltage withstand voltage tester according to claim 2, wherein two ends of the ACW relay (32) and the DCW relay (33) are respectively connected with a 100MEG resistor (38) in parallel, and a 500 ohm resistor (39) is connected between the diode (34) and the 1k resistor (35) in series.
4. The 20kV alternating current-direct current two-in-one ultrahigh voltage withstand voltage tester according to claim 2, wherein the contact of the ACW relay (32) can bear 45kV high voltage.
5. The 20kV alternating current-direct current two-in-one ultrahigh voltage withstand voltage tester according to claim 1, wherein a PID controller is arranged in the embedded main control module (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120590257.2U CN214669416U (en) | 2021-03-23 | 2021-03-23 | 20kV alternating current-direct current two-in-one ultrahigh voltage withstand voltage tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120590257.2U CN214669416U (en) | 2021-03-23 | 2021-03-23 | 20kV alternating current-direct current two-in-one ultrahigh voltage withstand voltage tester |
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| Publication Number | Publication Date |
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| CN214669416U true CN214669416U (en) | 2021-11-09 |
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| CN202120590257.2U Expired - Fee Related CN214669416U (en) | 2021-03-23 | 2021-03-23 | 20kV alternating current-direct current two-in-one ultrahigh voltage withstand voltage tester |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114035008A (en) * | 2021-11-10 | 2022-02-11 | 广东电网有限责任公司广州供电局 | Voltage withstand test circuit and device |
| CN115616257A (en) * | 2022-12-05 | 2023-01-17 | 常州同惠电子股份有限公司 | Alternating current and direct current test switching device and method for ultra-high voltage |
-
2021
- 2021-03-23 CN CN202120590257.2U patent/CN214669416U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114035008A (en) * | 2021-11-10 | 2022-02-11 | 广东电网有限责任公司广州供电局 | Voltage withstand test circuit and device |
| CN115616257A (en) * | 2022-12-05 | 2023-01-17 | 常州同惠电子股份有限公司 | Alternating current and direct current test switching device and method for ultra-high voltage |
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