CN114308736A - Capacitor product surge current performance test method and test equipment - Google Patents
Capacitor product surge current performance test method and test equipment Download PDFInfo
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- CN114308736A CN114308736A CN202111638704.8A CN202111638704A CN114308736A CN 114308736 A CN114308736 A CN 114308736A CN 202111638704 A CN202111638704 A CN 202111638704A CN 114308736 A CN114308736 A CN 114308736A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
The embodiment of the invention provides a method and equipment for testing surge current performance of a capacitor product, and relates to the field of capacitor products. The capacitor product surge current performance test method comprises the steps of obtaining a first signal representing the maximum current; acquiring a second signal representing real-time current after charging for a first preset time; acquiring a third signal representing the maximum voltage; the first signal, the second signal and the third signal are signals monitored by an oscilloscope in the process that surge current is applied to the capacitor product; if the capacitor product does not meet at least one of the following conditions, judging that the capacitor product is a defective surge current product; if all the following conditions are met, judging that the capacitor product is good at surge current; the conditions include that the maximum current is greater than a preset maximum current, the real-time current is less than a preset real-time current, and the maximum voltage is greater than a preset maximum voltage. The capacitor product surge current performance testing method can test and screen out capacitor products with performance not reaching the standard according to the judgment condition.
Description
Technical Field
The invention relates to the field of capacitor products, in particular to a method and equipment for testing surge current performance of a capacitor product.
Background
The performance of the capacitor product needs to be detected before the capacitor product is circulated, and the detection method in the prior art can only detect the capacitor product with the performance exceeding the standard, but cannot detect the capacitor product with the performance not reaching the standard.
Disclosure of Invention
The invention provides a capacitor product surge current performance testing method and testing equipment, which can detect not only capacitor products with performance exceeding the standard, but also capacitor products with performance not reaching the standard.
Embodiments of the invention may be implemented as follows:
the embodiment of the invention provides a method for testing surge current performance of a capacitor product, which comprises the following steps:
acquiring a first signal representing a maximum current;
acquiring a second signal representing real-time current after charging for a first preset time;
acquiring a third signal representing the maximum voltage;
judging whether the capacitor product is good or not according to the first signal, the second signal and the third signal;
wherein the first signal, the second signal and the third signal are signals monitored by an oscilloscope in the process that surge current is applied to the capacitor product;
if the capacitor product does not meet at least one of the following conditions, judging that the capacitor product is a surge current defective product;
if all the following conditions are met, judging that the capacitor product is a surge current good product;
wherein the conditions include:
the maximum current is greater than a preset maximum current;
the real-time current is less than a preset real-time current;
the maximum voltage is greater than a preset maximum voltage.
Optionally, after the step of determining that the capacitor product is an inrush current defective product, the method for testing the inrush current performance of the capacitor product further includes:
outputting a first screening signal representing screening of the surge current defective products;
and screening out the surge current defective products by the control clamp.
Optionally, the circuit for controlling the surge current applied to the capacitor product is switched by using an IGBT module.
Optionally, after the step of determining that the capacitor product is good at the inrush current, the method for testing the inrush current performance of the capacitor product further includes:
and after the surge current good product is continuously charged for a second preset time, the circuit is disconnected so as to carry out a voltage holding test.
Optionally, after the step of continuously charging the surge current good for a second preset time and then disconnecting the circuit to perform the voltage holding test, the method for testing the surge current performance of the capacitor product further includes:
and automatically discharging the surge current good products.
Optionally, after the surge current good product is subjected to the automatic discharging step, the method for testing the surge current performance of the capacitor product further includes:
and charging the surge current good products.
Optionally, after the step of charging the surge current good, the method for testing the surge current performance of the capacitor product further includes:
and carrying out leakage current test on the surge current good products, and automatically discharging after the test is finished.
Optionally, after the step of performing a leakage current test on the surge current good, the method for testing the surge current performance of the capacitor product further includes:
and (4) carrying out capacity, loss, equivalent series resistance and bottom protrusion tests on the surge current good products, and calculating the capacity change rate before and after the surge current tests.
Optionally, after the steps of measuring the capacity, the loss, the equivalent series resistance, and the bottom protrusion of the good surge current product are performed, and the capacity change rate before and after the surge current test is calculated, the method for measuring the surge current performance of the capacitor product further includes:
outputting a collection signal representing that the good capacitor products are collected;
and controlling a clamp to collect the good products of the capacitor.
The embodiment of the invention also provides a test device, which is applied to the surge current performance test method of the capacitor product;
wherein the test equipment is used for testing the capacitor product with the rated voltage of 500V and below 500V.
The method for testing the surge current performance of the capacitor product has the advantages that:
the capacitor product surge current performance test method comprises the steps of obtaining a first signal representing the maximum current; acquiring a second signal representing real-time current after charging for a first preset time; acquiring a third signal representing the maximum voltage; judging whether the capacitor product is good or not according to the first signal, the second signal and the third signal; the first signal, the second signal and the third signal are signals monitored by an oscilloscope in the process that surge current is applied to the capacitor product; if the capacitor product does not meet at least one of the following conditions, judging that the capacitor product is a defective surge current product; if all the following conditions are met, judging that the capacitor product is a surge current good product; wherein the conditions include: the maximum current is greater than a preset maximum current; the real-time current is less than the preset real-time current; the maximum voltage is greater than a preset maximum voltage. The capacitor product surge current performance testing method can judge and screen out capacitor products with performance not meeting the standard according to the judging conditions, and prevents the capacitor products not meeting the standard from circulating out.
The testing equipment is applied to the capacitor product surge current performance testing method, can test the surge current performance of the capacitor product and judge and screen out the capacitor products with performance not meeting the standard, and avoids the circulation of the capacitor products not meeting the standard.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a flowchart of a method for testing inrush current performance of a capacitor product according to this embodiment.
Icon: 1-feeding vibration disc and flat conveying track; 2-a transition zone; 3-return chain; 4-a first detection bit; 5-first escape position; 6-second detection bit; 7-a first charging region; 8-third detection position; 9-second discharge position; 10-a second charging region; 11-fourth detection bit; 12-a discharge zone; 13-fifth detection bit; 14-a good product collection box; 15-third discharge position.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
The performance of the capacitor product needs to be detected before the capacitor product is circulated, and the detection method in the prior art can only detect the capacitor product with the performance exceeding the standard, but cannot detect the capacitor product with the performance not reaching the standard.
Referring to fig. 1, the present embodiment provides a method and a device for testing the inrush current performance of a capacitor product, where the testing device is used to test the capacitor product with a rated voltage of 500V or less than 500V, and the method for testing the inrush current performance of the capacitor product can effectively solve the above-mentioned technical problems, and can detect not only the capacitor product with out-of-standard performance but also the capacitor product with out-of-standard performance.
The surge current performance test method of the capacitor product comprises the following steps:
s1: the control clamp conveys the capacitor product to the first detection position 4 for open circuit and short circuit detection, judges whether the capacitor product is an open circuit defective product or a short circuit defective product, outputs a third screening signal for screening the open circuit defective product and the short circuit defective product, and screens the open circuit defective product and the short circuit defective product.
Specifically, the control jig conveys the open-circuit defective products and the short-circuit defective products to the first discharge station 5 to screen out the open-circuit defective products and the short-circuit defective products.
S2: the clamp is controlled to convey the capacitor product which is subjected to open circuit and short circuit detection to a second detection position 6, and a first signal representing the maximum current is obtained; acquiring a second signal representing real-time current after charging for a first preset time; acquiring a third signal representing the maximum voltage; judging whether the capacitor product is good or not according to the first signal, the second signal and the third signal;
wherein the first signal, the second signal and the third signal are signals monitored by an oscilloscope in the process that surge current is applied to the capacitor product.
In this embodiment, the first preset time period may be adjusted according to performance parameters of the capacitor product.
And if the following at least one condition is not met, judging that the capacitor product is a surge current defective product, and if all the following conditions are met, judging that the capacitor product is a surge current defective product.
Wherein the conditions include: the maximum current is larger than the preset maximum current, the real-time current is smaller than the preset real-time current, and the maximum voltage is larger than the preset maximum voltage.
In this embodiment, there are seven conditions that satisfy the condition that the capacitor product is a defective surge current product, specifically:
1. the maximum current is less than the preset maximum current, the real-time current is greater than the preset real-time current, and the maximum voltage is less than the preset maximum voltage;
2. the maximum current is less than the preset maximum current, the real-time current is greater than the preset real-time current, and the maximum voltage is greater than the preset maximum voltage;
3. the maximum current is less than the preset maximum current, the real-time current is less than the preset real-time current, and the maximum voltage is greater than the preset maximum voltage;
4. the maximum current is less than the preset maximum current, the real-time current is less than the preset real-time current, and the maximum voltage is less than the preset maximum voltage;
5. the maximum current is greater than the preset maximum current, the real-time current is greater than the preset real-time current, and the maximum voltage is less than the preset maximum voltage;
6. the maximum current is greater than the preset maximum current, the real-time current is greater than the preset real-time current, and the maximum voltage is greater than the preset maximum voltage;
7. the maximum current is larger than the preset maximum current, the real-time current is smaller than the preset real-time current, and the maximum voltage is smaller than the preset maximum voltage.
In this embodiment, before the capacitor product is applied with the surge current, the oscilloscope is controlled to monitor the current and the voltage of the capacitor product in advance, and since the charging time of the small-capacity capacitor product is very short, the oscilloscope is controlled to monitor the current and the voltage of the capacitor product in advance, so that the oscilloscope can be ensured to capture the maximum current and the maximum voltage of the large-capacity capacitor in the process of being applied with the surge current and the real-time current value after the first preset charging time, and the oscilloscope can be ensured to capture the maximum current and the maximum voltage of the small-capacity capacitor product in the process of being applied with the surge current and the real-time current value after the first preset charging time.
The method comprises the steps that in the process of applying surge current to a capacitor product, the capacitor product is subjected to multiple charging and discharging cycles, an oscilloscope monitors the maximum current in each charging process of the capacitor product, the maximum voltage in each charging process and the real-time current value after charging for a first preset time length in each charging process, a first signal representing the maximum current in each charging process and a second signal representing the real-time current after charging for the first preset time length in each charging process are obtained, the voltage signals comprise a third signal representing the maximum voltage in each charging process, the capacitor product with performance not reaching the standard can be judged according to conditions, and then the risk that defective products of the surge current circulate to a client is reduced.
Specifically, the number of cycles may be three, five, or ten, and the like, and is not particularly limited herein.
S3: the first screening signal that surge current defective products were screened out is exported the sign, and control anchor clamps screen out surge current defective products.
In the present embodiment, the circuit for controlling the application of the inrush current to the capacitor product is switched by using an IGBT module.
The IGBT module is high-power resistant, so that the high-voltage capacitor product can be used for detecting surge current.
S4: and after the surge current good product is continuously charged for a second preset time, the circuit is disconnected so as to carry out a voltage holding test.
Specifically, the control jig conveys the surge current good product to the first charging area 7 for continuous charging.
The second preset time period can be adjusted according to the performance parameters of the capacitor product.
S5: and the control clamp conveys the surge current good products to a third detection position 8 for voltage holding test, and automatic discharge is carried out after the voltage holding test is finished.
S6: and outputting a second screening signal for screening out the defective products of the holding voltage according to the representation, and controlling the clamp to screen out the defective products of the holding voltage.
In this embodiment, the control jig transfers the surge current defective product and the holding voltage defective product to the second discharge position 9 for screening.
S7: and charging the good products with the maintained voltage.
Specifically, the control jig conveys the good products, which have completed the holding voltage, to the second charging region 10 for charging.
S8: and carrying out leakage current test on the good products of the holding voltage, and automatically discharging after the test is finished.
Specifically, the control jig conveys the good products of the holding voltage to the fourth detection position 11 for leakage current testing, and the control jig conveys the good products of the tested holding voltage to the discharge area 12 for automatic discharging.
S9: and (4) carrying out capacity, loss, equivalent series resistance and bottom convex tests on the good products with the leakage current, and calculating the capacity change rate before and after surge current tests.
Specifically, the control jig conveys the capacitor product subjected to the leakage current test to the fifth detection position 13 for capacity, loss, equivalent series resistance and bottom-convex tests, and calculates the capacity change rate before and after the surge current test.
S10: and outputting collection signals representing the collection of surge current good products, holding voltage good products, leakage current good products, capacity, loss, equivalent series resistance, capacity change rate before and after surge current test and bottom convex good products, and controlling the clamp to collect.
Specifically, the control jig conveys surge current good products, holding voltage good products, leakage current good products, capacity, loss, equivalent series resistance, capacity change rate before and after surge current testing, and bottom-convex good products to the good product collection box 14 for collection.
S11: and outputting a fourth screening signal for screening out the leakage current, the capacity, the loss, the equivalent series resistance, the capacity change rate before and after the surge current test and the bottom convex defective products, and controlling the clamp to screen out the leakage current, the capacity, the loss, the equivalent series resistance, the capacity change rate before and after the surge current test and the bottom convex defective products.
In this embodiment, the control jig conveys the defective products of the leakage current, the capacity, the loss, the equivalent series resistance, the capacity change rate before and after the surge current test, and the bottom-convex defective products to the third discharge position 15 for screening.
In addition, before surge current testing is carried out on the capacitor product, the capacitor product can also be subjected to capacity and loss testing, a fifth screening signal for screening out capacity defective products and loss defective products is output and represented, and the clamp is controlled to screen out the capacity defective products and the loss defective products.
In this embodiment, the number of the jigs corresponds to the number of the capacitor products, wherein one jig may or may not have one capacitor product. In other embodiments, one fixture may hold a plurality of capacitor products, and is not limited herein.
The clamps are arranged on the return chain 3 for conveying movement.
Specifically, the form of the jig is not limited, and the jig may be a clip, a suction nozzle for performing vacuum suction, or the like. In addition, in order to carry out surge current testing on various capacitor products, the form of the clamp can be changed according to the structure of the capacitor products, so that the clamp is matched with the capacitor products.
In the present embodiment, the return chain 3 is square, and in other embodiments, the return chain 3 may have other shapes, which is not limited herein.
The capacitor product is conveyed to the return chain 3 through the feeding vibration disc and the flat conveying track 1 and is connected with the clamp.
Specifically, the capacitor products are loaded through a loading tray and are orderly arranged in a flatly conveying track in a mode that the bodies face upwards and the leads face downwards.
More, the capacitor products are subjected to pin separation, positive and negative electrode detection and positive and negative electrode correction in a transition area 2 between the feeding vibration disc and the flat conveying track 1 and the return chain 3, so that the positive and negative electrode directions of all the capacitor products are consistent, and meanwhile, the capacitor products are subjected to capacity and loss detection before surge current testing.
In summary, the embodiment of the present invention provides a method and a device for testing the surge current performance of a capacitor product, where the method includes acquiring a current signal and a voltage signal of the capacitor product, which are monitored by an oscilloscope, in a process of applying a surge current to the capacitor product, where the current signal includes a first signal representing a maximum current and a second signal representing a real-time current after charging for a first preset time period, and the voltage signal includes a third signal representing a maximum voltage; if the capacitor product does not meet at least one of the following conditions, judging that the capacitor product is a surge current defective product; if all the following conditions are met, judging that the capacitor product is a surge current good product; wherein the conditions include: the maximum current is greater than a preset maximum current; the real-time current is less than a preset real-time current; the maximum voltage is greater than a preset maximum voltage. The capacitor product surge current performance testing method can judge the capacitor product with performance not reaching the standard according to the judging condition, avoids the capacitor product not reaching the standard from circulating out, can judge and screen out the capacitor product with performance exceeding the standard, and avoids the capacitor product exceeding the standard from circulating out.
The testing equipment is applied to the capacitor product surge current performance testing method, can test the surge current performance of the capacitor product and judge and screen out the capacitor products with performance not meeting the standard, and avoids the circulation of the capacitor products not meeting the standard.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A method for testing surge current performance of a capacitor product is characterized by comprising the following steps:
acquiring a first signal representing a maximum current;
acquiring a second signal representing real-time current after charging for a first preset time;
acquiring a third signal representing the maximum voltage;
judging whether the capacitor product is good or not according to the first signal, the second signal and the third signal;
wherein the first signal, the second signal and the third signal are signals monitored by an oscilloscope in the process that surge current is applied to the capacitor product;
if the capacitor product does not meet at least one of the following conditions, judging that the capacitor product is a surge current defective product;
if all the following conditions are met, judging that the capacitor product is a surge current good product;
wherein the conditions include:
the maximum current is greater than a preset maximum current;
the real-time current is less than a preset real-time current;
the maximum voltage is greater than a preset maximum voltage.
2. The method for testing the surge current performance of the capacitor product according to claim 1, wherein after the step of determining that the capacitor product is an inrush current defective product, the method for testing the surge current performance of the capacitor product further comprises:
outputting a first screening signal representing screening of the surge current defective products;
and screening out the surge current defective products by the control clamp.
3. The method for testing the surge current performance of the capacitor product according to claim 1, wherein the circuit for controlling the application of the surge current to the capacitor product is switched by using an IGBT module.
4. The method for testing the surge current performance of the capacitor product according to claim 1, wherein after the step of determining that the capacitor product is good at surge current, the method for testing the surge current performance of the capacitor product further comprises:
and after the surge current good product is continuously charged for a second preset time, the circuit is disconnected so as to carry out a voltage holding test.
5. The method for testing the surge current performance of the capacitor product according to claim 4, wherein after the step of continuously charging the surge current good product for a second preset time and then disconnecting the circuit to perform the voltage holding test, the method for testing the surge current performance of the capacitor product further comprises:
and automatically discharging the surge current good products.
6. The method for testing the surge current performance of the capacitor product according to claim 5, wherein after the step of automatically discharging the surge current good product, the method for testing the surge current performance of the capacitor product further comprises the following steps:
and charging the surge current good products.
7. The method for testing the surge current performance of the capacitor product according to claim 6, wherein after the step of charging the surge current good product, the method for testing the surge current performance of the capacitor product further comprises:
and carrying out leakage current test on the surge current good products, and automatically discharging after the test is finished.
8. The method for testing the surge current performance of the capacitor product according to claim 7, wherein after the step of testing the surge current good product for leakage current, the method for testing the surge current performance of the capacitor product further comprises:
and carrying out capacity, loss, equivalent series resistance and bottom protrusion tests on the surge current good products, and calculating the capacity change rate before and after the surge current tests.
9. The method for testing the surge current performance of the capacitor product according to claim 8, wherein after the steps of performing capacity, loss, equivalent series resistance and bottom-convex tests on the surge current good product and calculating the capacity change rate before and after the surge current test, the method for testing the surge current performance of the capacitor product further comprises the following steps:
outputting a collection signal representing that the good capacitor products are collected;
and controlling a clamp to collect the good products of the capacitor.
10. A test device, wherein the test device is applied to the capacitor product inrush current performance test method according to any one of claims 1 to 9;
wherein the test equipment is used for testing the capacitor product with the rated voltage of 500V and below 500V.
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| CN212783108U (en) * | 2020-07-28 | 2021-03-23 | 深圳中元电子有限公司 | Online surge detection device of full-automatic high-voltage aging machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4307342A (en) * | 1979-07-16 | 1981-12-22 | Western Electric Co., Inc. | Method and apparatus for testing electronic devices |
| WO1991012094A2 (en) * | 1990-02-13 | 1991-08-22 | Egapro Ag | Process and device for recuperating used batteries |
| CN207457382U (en) * | 2017-11-13 | 2018-06-05 | 深圳市智胜新电子技术有限公司 | Electrolytic capacitor surge test frock |
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