TWM399324U - Degradation alarm circuit for DC capacitor - Google Patents

Description

M399324 V. New Description: [New Technology Field] [0001] The present invention relates to a DC capacitor degradation alarm circuit, and more particularly to a voltage difference that can be automatically detected in the operation of a DC power supply system and degraded by the degradation. To provide an alarm signal. [Prior Art] [0002] The energy storage and filter capacitors in DC power supplies generally use electrolytic capacitors because of their larger capacitance than other dielectric values (ceramic, mica, glass, paper, oil, etc.). However, the disadvantages are poor frequency and temperature characteristics, short life, large leakage current, etc., and when the terminal voltage exceeds the specification, the electrolyte is ejected via gasification. At the same time, the electric 'solvent dryness also causes capacitance; 1 .'f ,. attenuation degradation, there are restrictions in applications that require long-term high-density; in the past, the power supply design was used to connect several Electrolyte capacitance to achieve large capacitance values, but such design has caused maintenance difficulties. [0003] However, the reliability of the power supply system and the charging device has always been an extremely important part of the power quality issue. However, in the power supply process, the DC charging system may cause abnormal power supply due to capacitance degradation, causing shutdown of related power equipment. For example, the production lockout of petrochemical or nuclear power plants, financial markets (computer crashes in financial trading markets), mass transit chaos, etc., threaten life safety, finance and the surrounding environment. [0004] The deterioration of the capacitor will reduce the filtering effect, causing the DC side voltage ripple to become large, thereby causing damage to the energy storage device, and the energy storage device is a valuable device, and it is an important device in the uninterruptible power system. Therefore, for the storage form number A0101, page 3/18 pages can be protected by capacitors. In recent years, due to the development of technology, the use of various electronic instruments and precision equipment is becoming more and more common. The more important the requirements for the stability of the uninterruptible power system, the more the capacitors are degraded. It is necessary to switch the power supply to other power sources for power supply, so that the uninterruptible power system is in the state of shutdown, or it needs to be periodically tested to prevent the automatic deterioration alarm; therefore, the above solution solves the above problems and allows DC power supply. The system can perform the operation of detecting the deterioration of the capacitor in normal operation, and does not affect the electrical equipment on the output side of the uninterruptible power system. [New Content] [0005] This is a kind of DC capacitor inferior alarm electric shouting,: the method of overcoming the detection of capacitors in the existing power supply system is a regular and man-made measurement method to judge the deterioration degree of the capacitor. The function of automatic online detection and capacitance degradation alarm cannot be performed in the operation of the power supply system. [0006] Therefore, the purpose of the present invention is to provide a capacitance degradation detecting device. The capacitance degradation detecting device includes two filtering circuits and a degradation. The detecting component is configured to receive the rectified voltage for filtering, and is connected in parallel by a parallel connection. The filter circuit is composed of a plurality of capacitor modules connected in series, and the capacitor module can be a single capacitor or a series capacitor. Or a plurality of capacitors are arranged in parallel to facilitate a user to configure a required capacitance value; the degradation detecting component is electrically connected between the two filter circuits, and the connection point is located between the plurality of capacitance modules of the filter circuit, and the two filters can be detected. The voltage difference of the circuit' is calculated with the overall output voltage to provide the power of the filter circuit % Difference detection message. Form No. A0101 Page 4 of 18 [0007] [0007] [0009] [0010] The present invention is to improve the detection method of the existing capacitor degradation, and use the degradation detecting element to detect the voltage difference between the two filter circuits and The overall output voltage is calculated as a percentage (yd), and the pre-set value is used to judge the deterioration.

If the Vout image exceeds the preset value of the user, the degradation detecting component can alert the user by an alarm sound in the buzzer mode, and the effect of the capacitor module degradation alarm can be achieved, or the degradation detecting component can display the warning light to remind the user. To prevent the deterioration of the precious energy storage device. The present invention is a DC capacitor degradation alarm circuit, which can detect the capacitance value on the line of the degradation detecting component during the normal operation of the power supply system, and during the charging mode switching process of the power supply system, the variation of the charging voltage affects the detection result of the degradation detecting component. Is an alarm circuit with automatic detection of capacitance degradation on the line. In summary, a DC capacitor degradation alarm circuit has the following advantages: 1. It can automatically detect the capacitor's capacitance degradation during the normal operation of the power supply system, and does not affect the output power equipment. 2. When the capacitor is degraded, an alarm signal is sent to remind the user to check the deterioration of the capacitor or to replace it. 3. There is no false alarm due to the voltage difference generated by the power supply system during the charging mode switching. [Embodiment] Please refer to Fig. 1, the DC capacitor degradation alarm circuit of the present invention includes: Table No. A0101 Page 5 of 18 [0011] M399324 A rectifier circuit 1 'The rectifier circuit 1 provides a rectified voltage Filter energy storage. a capacitance degradation detecting device 2 for detecting a rectified voltage of the receiving rectifying circuit 1, comprising two filtering circuits 21 and at least one degradation detecting element 22; the filtering circuit 21 filtering for receiving a rectified voltage The operation is performed, and the two filter circuits 21 are connected to each other in parallel. The filter circuit 21 is composed of a plurality of capacitor modules 211 connected in series. The capacitor module 211 can be a single capacitor 2111 or a plurality of capacitors 2111 connected in series or a plurality of capacitors 2111 connected in parallel. The composition is configured to facilitate the user to configure the required capacitance value (as shown in FIG. 6); the degradation detecting component 22 is electrically connected between the two filter circuits 21, and the connection point is located in the filter, the electric circuit; Between the groups 211, the voltage difference between the two filters; the electropath 21 can be detected, and the overall output voltage is calculated to provide the detection information of the filter and the circuit 21. An energy storage device 3 receives the rectified voltage filtered by the filter circuit 21 for energy storage. Please refer to FIG. 1 , the purpose of the present invention is to detect the degree of deterioration of the capacitor 2111 of the capacitor module 211 in the DC power supply system, and the operation flow is received by the filter circuit 21 to receive the rectified voltage provided by the rectifier circuit 1 . 211 Performing the filtering operation 'Storing the rectified voltage in the energy storage device 3 〇 Please refer to FIG. 2 'This creation is an embodiment in which the filter circuit 21 is connected in series with the first capacitor module 21 la and the second capacitor module 211 . b, the capacitance of the first capacitor module 211a is C1 'the capacitance of the second capacitor module 211b is C2; the other filter circuit 21 is connected in series with the third capacitor module 21lc and the fourth capacitor module 211d 'the third capacitor module 211c has a capacitance value of C3, and a fourth capacitor module 211d has a capacitance value of C4; and the degradation detecting element 22 has a first capacitance mode form number A0101, page 6 of 18 M399324 group 21 la and second capacitor module 2 lib Between the third capacitor module 211c and the fourth capacitor module 2Ud, the voltage value VI between the first capacitor module 21 la and the second capacitor module 2 lib can be detected (VI = Voutx Cl ' Vout For the overall output voltage), and the third capacitive mode a + ci 211〇 module 211 and the fourth capacitor (a voltage value of 72 (= 2 ^ 7〇111; > < C3), and the value of the voltage difference between the voltages VI and V2 calculated C3 + C4

Vd (Vd = Vl-V2) 'reuse voltage difference Vd and the percentage of the overall output voltage Vout (vd = _^) and

Vout Cl + C2 C3 + C4 set value to judge the deterioration phenomenon;

Vout sees the result of the judgment, and does not affect the detection result by the change of the overall output voltage vout, for example, the change in the supply voltage of the mains or the overall output voltage V〇ut of the floating charge and the fast charge mode of the energy storage device 3.

Referring to FIG. 1 , the percentage difference (^ ) of the voltage difference received by the degradation detecting component 22 can be set according to the user's requirements.

When the capacitance value of Vout 211 is degraded, a voltage difference is generated. If the percentage of the voltage difference exceeds the setting of the user, an alarm sound is generated by the degradation detecting element 22 in a buzzer manner to remind the user that the capacitance module 211 can be degraded. The effect of the alarm, or the degradation detecting component 22 is displayed by the warning light to remind the user that the deterioration detecting component 22 continuously displays the voltage difference with the voltage value display for the user to record and check; the degradation detecting component 22 can also generate the detection. The message is transmitted to the remote computer for recording, so that the user can record the deterioration degree and deterioration trend data of the capacitance module 211 of the form number A0101, page 7/18, to prevent the deterioration from affecting the expensive energy storage device 3. As shown in FIG. 3 , in the above embodiment, the second capacitor module 21 lb can be connected in series with the fifth capacitor module 211 e and the capacitor value is C5, and the fourth capacitor module 2 lid is connected to the sixth capacitor module 211f. The capacitance value is C6, and a second degradation detecting element 22a is connected between the second capacitor module 211b and the fifth capacitor module 211e. The second degradation detecting component 22a is electrically connected to the fourth capacitor module 211d. Between the sixth capacitor modules 211f, the second degradation detecting element 22a detects the voltage value V3 (V3 = Vout x Cl + C2 ) ' on the fifth capacitor module 211 side and the voltage value ci on the If side of the sixth capacitor module 21 +a + C5 V4(V4= Voutx C3 + 04 ) Electricity iv3 and V4 calculate a + C4+c6 , voltage difference Vd2 (Vd2 = V3-V4), and calculate the voltage difference from the overall output voltage v〇ut Percentage (v<i2), as a percentage of voltage difference (

Vout

Vd2) can also detect the presence or absence of degradation of the capacitance model 211.

Voat, please refer to FIG. 4, another embodiment of the present invention. The capacitor degradation detecting device 2' is a filter circuit 21 which is composed of two capacitor modules 211 connected in series. Deteriorating detecting element 22, the capacitance values of the two capacitor modules 211 are respectively

The detection element 22 can detect the voltage division value Vp (Vp=v〇u tX c\ f ) ' and calculate the voltage division c\ +a with the overall output voltage Vout, Form No. A0101 Page 8 of 18 M399324 Percentage of pressure (Vp), if the percentage of voltage divider exceeds the user

Voul is pre-set and automatically sends an alert message. Referring to Figures 4 and 5, the capacitance deterioration detecting device 2 of the present invention can be connected by an array, and is disposed between the rectifier circuit 1 and the energy storage device 3, and has the function of individual detection while improving the capacitance. Each group of the degradation detecting elements 22 can individually provide the degree of deterioration of the capacitance module 211 of the capacitance degradation detecting device 2, facilitating the user to perform subsequent maintenance processing and degradation tracking recording. BRIEF DESCRIPTION OF THE DRAWINGS [0012] Fig. 1 is a circuit diagram of a DC 奄 container deterioration alarm of the present invention. [0013] FIG. 2 is a circuit diagram (1) of an embodiment of the present invention. [0014] FIG. 3 is a circuit diagram (2) of an embodiment of the present invention. [〇〇15] Fig. 4 is a circuit diagram of another embodiment of the present invention. [0016] Fig. 5 is a circuit diagram of the capacitance deterioration detecting device of the creation connection number. [00Π] Fig. 6 is a schematic diagram of a series of capacitors connected in series and in parallel. [Main component symbol description] [0018] 1. Rectifier circuit 2. Capacitance degradation detecting device [0019] 21. Chopper circuit 211. Capacitor module [0020] 211 a, first capacitor module 211b, second capacitor module [0021] 211c·third capacitor module 211d. fourth capacitor module form number A0101 page 9/total 18 pages M399324 [0023] [0024] 2 lie. fifth capacitor module 21 If. sixth Capacitor module 2111. Capacitor 22. Degradation detecting element 22a. Second degradation detecting element 3. Energy storage device form number A0101 Page 10 of 18

Claims (1)

M399324 & Patent Application Range: A DC capacitor degradation alarm circuit, comprising: at least one capacitance degradation detecting device, wherein the capacitance degradation detecting device comprises two filtering circuits and at least one degradation detecting component; The operation of receiving the rectified voltage for filtering is connected in parallel, the filter circuit is composed of a plurality of capacitor modules, and at least one degradation detecting component is electrically connected between the two filter circuits, and the connection point is located in the filter circuit. Between several capacitor modules. The DC capacitor degradation alarm circuit of claim 1, wherein the two filter circuits have the same number of capacitor modules connected in series. The DC capacitor deterioration alarm circuit as described in claim 1, wherein the capacitor module is a single capacitor. The DC capacitor deterioration alarm circuit according to claim 1, wherein the capacitor module is composed of a series capacitor. The DC capacitor degradation alarm circuit according to claim 1, wherein the capacitor module is composed of a plurality of capacitors connected in parallel. A DC capacitor degradation alarm circuit comprising: at least one capacitance degradation detecting device, the capacitance degradation detecting device comprising a filter circuit and at least one degradation detecting component; - a filtering circuit for filtering the received rectified voltage, the The filter circuit is composed of a plurality of capacitor modules connected in series; and at least one degradation detecting component is electrically connected between the plurality of capacitor modules of the filter circuit. • The DC capacitor degradation alarm circuit of claim 6, wherein the capacitor module is a single capacitor. ° 。 。 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 214 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 9. The DC capacitor degradation alarm circuit according to claim 6, wherein the capacitor module is composed of a plurality of capacitors connected in parallel. 099214876 Form No. A0101 Page 12 of 18 0992045383-0