CN214174520U - Alternating current capacitor test circuit - Google Patents
Alternating current capacitor test circuit Download PDFInfo
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- CN214174520U CN214174520U CN202023159914.2U CN202023159914U CN214174520U CN 214174520 U CN214174520 U CN 214174520U CN 202023159914 U CN202023159914 U CN 202023159914U CN 214174520 U CN214174520 U CN 214174520U
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Abstract
The utility model relates to a condenser test technical field specifically discloses an alternating current capacitor test circuit, wherein, include: the device comprises a direct-current power supply, an alternating-current capacitor to be tested, a first switch and a second switch, wherein one end of the first switch is connected with the negative electrode of the direct-current power supply, one end of the alternating-current capacitor to be tested is connected with the positive electrode of the direct-current power supply, the other end of the alternating-current capacitor to be tested is connected with the other end of the first switch, one end of the second switch is connected with one end of the alternating-current capacitor to be tested, and the other end of the second switch is connected with the other end of the alternating-current capacitor to be tested after being connected with a discharge resistor in series. The embodiment of the utility model provides an alternating current capacitor test circuit can adopt the mode that the direct current charges, then self short circuit of rethread discharges, can produce pinnacle pulse current in the twinkling of an eye, and the electric current can reach 1000~1400A in the twinkling of an eye to can effectively discern contact type bad electric capacity, and then avoided the outflow of hidden danger electric current ware.
Description
Technical Field
The utility model relates to a condenser test technical field especially relates to an alternating current capacitor test circuit.
Background
The alternating current capacitor is applied to white appliances, industrial equipment, open-well equipment, medical equipment (such as a breathing machine) and the like, and the requirement on the internal connection of the capacitor is higher and higher due to the fact that the alternating current capacitor works in an alternating current state and is frequently subjected to a switching process. Because the large current impact during the instant starting is about 10-15 times of the rated current, the normal working current is about 3.6A and the instant impact current reaches 36A calculated by a capacitance of 35 muF and the rated working voltage 330V, which are the examinations on the connection performance of the welding connection point and the zinc-sprayed layer of each part of the capacitor. However, the test process in the production process of the capacitor only adopts 2 times of alternating current, the current is only about 10A, and the defective capacitance cannot be detected, so that a very small amount of defective contact products in the market flows out.
Therefore, how to detect the contact defective ac capacitor is a technical problem that those skilled in the art are eagerly to solve.
Disclosure of Invention
The utility model provides an alternating current capacitor test circuit solves the problem of the unable monitoring contact class defective products that exists among the correlation technique.
As an aspect of the present invention, there is provided an ac capacitor test circuit, wherein, include: the device comprises a direct current power supply, an alternating current capacitor to be tested, a first switch and a second switch, wherein one end of the first switch is connected with the negative electrode of the direct current power supply, one end of the alternating current capacitor to be tested is connected with the positive electrode of the direct current power supply, the other end of the alternating current capacitor to be tested is connected with the other end of the first switch, one end of the second switch is connected with one end of the alternating current capacitor to be tested, and the other end of the second switch is connected with the other end of the alternating current capacitor to be tested after being connected with a discharge resistor in series;
when the first switch is closed and the second switch is opened, the direct current power supply and the alternating current capacitor to be tested form a closed loop and can charge the alternating current capacitor to be tested;
when the first switch is opened and the second switch is closed, the alternating current capacitor to be tested and the discharge resistor form a closed loop, and the alternating current capacitor to be tested discharges the discharge resistor.
Further, the dc power supply includes: the primary side of the first transformer is connected with an alternating current power supply, the secondary side of the first transformer is connected with the positive side of the second transformer, the secondary side of the second transformer is connected with the rectifying circuit, the output end of the rectifying circuit is connected with one end of the output resistor, and the other end of the output resistor is the positive electrode of the direct current power supply.
Further, the resistance value of the discharge resistor is 1 Ω.
The embodiment of the utility model provides an alternating current capacitor test circuit can adopt the mode that the direct current charges, then self short circuit of rethread discharges, can produce pinnacle pulse current in the twinkling of an eye, and the electric current can reach 1000~1400A in the twinkling of an eye to can effectively discern contact type bad electric capacity, and then avoided the outflow of hidden danger electric current ware.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a schematic circuit diagram of the ac capacitor test circuit provided by the present invention.
Fig. 2 is a schematic circuit diagram of another embodiment of an ac capacitor testing circuit according to the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances for purposes of describing the embodiments of the invention herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In this embodiment, an ac capacitor testing circuit is provided, and fig. 1 is a schematic circuit diagram of an ac capacitor testing circuit provided according to an embodiment of the present invention, as shown in fig. 1, including:
the device comprises a direct current power supply U, an alternating current capacitor C to be tested, a first switch K1 and a second switch K2, wherein one end of the first switch K1 is connected with the negative electrode of the direct current power supply U, one end of the alternating current capacitor C to be tested is connected with the positive electrode of the direct current power supply U, the other end of the alternating current capacitor C to be tested is connected with the other end of the first switch K1, one end of the second switch K2 is connected with one end of the alternating current capacitor C to be testedThe other end of the second switch K2 is connected in series with a discharge resistor RDischarge resistorThen connecting the other end of the AC capacitor C to be tested;
when the first switch K1 is closed and the second switch K2 is opened, the direct current power supply U and the alternating current capacitor C to be tested form a closed loop and can charge the alternating current capacitor C to be tested;
when the first switch K1 is opened and the second switch K2 is closed, the alternating current capacitor C to be tested and the discharge resistor R are connectedDischarge resistorForming a closed loop, the AC capacitor C to be tested is coupled with the discharge resistor RDischarge resistorAnd discharging is performed.
The embodiment of the utility model provides an alternating current capacitor test circuit can adopt the mode that the direct current charges, then self short circuit of rethread discharges, can produce pinnacle pulse current in the twinkling of an eye, and the electric current can reach 1000~1400A in the twinkling of an eye to can effectively discern contact type bad electric capacity, and then avoided the outflow of hidden danger electric current ware.
As a specific embodiment of the dc power supply, as shown in fig. 2, the dc power supply includes: a first transformer T1, a second transformer T2, a rectifying circuit D and an output resistor ROutput ofThe primary side of the first transformer T1 is connected with an alternating current power supply, the secondary side of the first transformer T1 is connected with the positive side of the second transformer T2, the secondary side of the second transformer T2 is connected with the rectifying circuit D, and the output end of the rectifying circuit D is connected with the output resistor ROutput ofOne end of the output resistor ROutput ofAnd the other end of the second power supply is the anode of the direct current power supply U.
Preferably, the discharge resistor RDischarge resistorThe resistance value of (2) is 1 Ω.
To sum up, the utility model provides an alternating current capacitor test circuit can promote the sensitivity that unusual capacity attenuation detected, and the component appears 0.5% capacity attenuation can be detected to be selected separately (conventional charge-discharge equipment can be detected to be selected separately for the capacity attenuation of 3%) to the reliability of finished product electric capacity has been promoted. The sensitivity of loss anomaly detection is improved, the elements can be detected and sorted when 0.05% loss anomaly occurs (0.12% loss anomaly of conventional charge and discharge equipment can be detected and sorted), and therefore the reliability of finished product capacitors is improved. In the circuit, a vacuum arc extinguish chamber is used for replacing a wire or a copper electrode design adopted in the conventional short circuit discharge device, the unique vacuum design of the circuit enables the contact state to be more stable, the circuit can be switched off instantly, and the circuit is safer and more reliable.
It is to be understood that the above embodiments are merely exemplary embodiments that have been employed to illustrate the principles of the present invention, and that the present invention is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (3)
1. An alternating current capacitor test circuit, comprising: the device comprises a direct current power supply, an alternating current capacitor to be tested, a first switch and a second switch, wherein one end of the first switch is connected with the negative electrode of the direct current power supply, one end of the alternating current capacitor to be tested is connected with the positive electrode of the direct current power supply, the other end of the alternating current capacitor to be tested is connected with the other end of the first switch, one end of the second switch is connected with one end of the alternating current capacitor to be tested, and the other end of the second switch is connected with the other end of the alternating current capacitor to be tested after being connected with a discharge resistor in series;
when the first switch is closed and the second switch is opened, the direct current power supply and the alternating current capacitor to be tested form a closed loop and can charge the alternating current capacitor to be tested;
when the first switch is opened and the second switch is closed, the alternating current capacitor to be tested and the discharge resistor form a closed loop, and the alternating current capacitor to be tested discharges the discharge resistor.
2. The ac capacitor testing circuit of claim 1, wherein the dc power supply comprises: the primary side of the first transformer is connected with an alternating current power supply, the secondary side of the first transformer is connected with the positive side of the second transformer, the secondary side of the second transformer is connected with the rectifying circuit, the output end of the rectifying circuit is connected with one end of the output resistor, and the other end of the output resistor is the positive electrode of the direct current power supply.
3. The ac capacitor testing circuit according to claim 1, wherein the resistance value of said discharge resistor is 1 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023159914.2U CN214174520U (en) | 2020-12-24 | 2020-12-24 | Alternating current capacitor test circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023159914.2U CN214174520U (en) | 2020-12-24 | 2020-12-24 | Alternating current capacitor test circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214174520U true CN214174520U (en) | 2021-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023159914.2U Active CN214174520U (en) | 2020-12-24 | 2020-12-24 | Alternating current capacitor test circuit |
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|---|---|
| CN (1) | CN214174520U (en) |
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2020
- 2020-12-24 CN CN202023159914.2U patent/CN214174520U/en active Active
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