Capacitor activation device

Abstract

The utility model discloses a capacitor activation device, comprising: a power supply module for providing an adjustable voltage; the rectification module is coupled with the power supply module and the capacitor to be activated; the display module is coupled with the rectification module and the capacitor to be activated, and the display module is a bulb; wherein the power supply module comprises a first transformer, a first switch connected with the first transformer in series and a second transformer, the primary side of the second transformer is connected with the first transformer and the first switch which are connected in series, the secondary side of the second transformer is coupled with the rectifier module, the first transformer is an adjustable transformer, and the second transformer is a boosting transformer. According to the capacitor activation device, the power supply module capable of providing adjustable voltage is arranged, so that safe charging of the frequency converter capacitor is realized, and the problem of capacitor failure caused by long-term storage of frequency converter spare parts is solved; and the on-line frequency converter can be tested and diagnosed, so that fault processing is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of capacitor activation, in particular to a capacitor activation device used in a direct current circuit of a frequency converter. Background Art

[0002] If the inverter capacitor is stored for a long time, it will cause the capacitor to fail. In order to restore the capacitor to new energy, the inverter capacitor must be reactivated, otherwise its leakage current will increase. If a high voltage is applied sharply during the reactivation process, the capacitor may be damaged due to the rapid increase in temperature, bringing the risk of the inverter exploding when it is put online. Therefore, a large number of inverter spare parts that have been stored for more than half a year need to be slowly charged and "aged" (for every year of non-use, the "aging" time is about 1 hour). However, there is currently a lack of pre-charging devices, so inverter spare parts that have been stored for a long time cannot be pre-charged; and after replacing capacitors and other devices in online AC-DC-AC transmission devices, online pre-charge activation tests cannot be performed due to the lack of capacitor activation devices, and thus the fault cannot be pre-processed. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a capacitor activation device, which can be used for activating inverter capacitors, including: a power module, providing an adjustable voltage; a rectifier module, coupling the power module and the capacitor to be activated; and a display module, coupling the rectifier module and the capacitor to be activated, wherein the display module is a light bulb; wherein the power module includes a first transformer, a first switch connected in series with the first transformer, and a second transformer, the primary side of the second transformer is connected to the first transformer and the first switch connected in series, the secondary side of the second transformer is coupled to the rectifier module, the first transformer is an adjustable transformer, and the second transformer is a step-up transformer.

[0004] Furthermore, the capacitor activation device further includes: a current limiting module coupled to the rectifier module and the capacitor to be activated.

[0005] Furthermore, the rectifier module is a diode bridge rectifier circuit, an input end of which is coupled to the power module, and an output end of which is coupled to the capacitor to be activated.

[0006] Furthermore, the voltage adjustment range of the adjustable transformer is 0-220V.

[0007] Furthermore, the first switch is a circuit breaker.

[0008] It can be seen from the above scheme that the advantages of the utility model are: the capacitor activation device of the utility model realizes safe charging of the inverter capacitor by setting a power module and a rectifier module that can provide adjustable voltage, solves the problem of capacitor failure caused by long-term storage of inverter spare parts, and can test and diagnose online inverters, facilitating fault handling.

[0009] The utility model provides a current limiting module to prevent excessive current from impacting the capacitor, causing the capacitor to burn out and the machine to explode.

[0010] The utility model provides a display module to serve as an indicator for the charging circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figures 1A to 1C This is a schematic diagram of the structure of the capacitor activation device of the utility model;

[0012] Figure 2 for Figure 1C The circuit diagram corresponding to the capacitor activation device;

[0013] Among them, the reference numerals

[0014] 1,1a,1b - Capacitor activation device;

[0015] 10- Power module;

[0016] 11-rectifier module;

[0017] 12-Capacitor to be activated;

[0018] 13-current limiting module;

[0019] 14-display module;

[0020] AC1-adjustable transformer;

[0021] QF1-circuit breaker;

[0022] T1-second transformer;

[0023] VD1~VD4-diode;

[0024] FU1-fuse;

[0025] R1-bulb;

[0026] C1-capacitor;

[0027] U1-second transformer primary side voltage;

[0028] U2-Second transformer secondary voltage. DETAILED DESCRIPTION

[0029] The technical solution of the utility model is described in detail below in conjunction with the accompanying drawings and specific embodiments to further understand the purpose, solution and effect of the utility model, but it is not intended to limit the scope of protection of the claims attached to the utility model.

[0030] References to "an embodiment", "another embodiment", "this embodiment", etc. in the specification refer to the embodiment being described which may include specific features, structures or characteristics, but not every embodiment must include these specific features, structures or characteristics. In addition, such expressions do not refer to the same embodiment. Furthermore, when describing specific features, structures or characteristics in conjunction with an embodiment, whether or not there is an explicit description, it is indicated that incorporating such features, structures or characteristics into other embodiments is within the knowledge of those skilled in the art.

[0031] Certain words are used in the specification and subsequent claims to refer to specific components or parts. People of ordinary skill in the art should understand that technical users or manufacturers can refer to the same component or part with different nouns or terms. This specification and claims do not use differences in names as a way to distinguish components or parts, but use differences in the functions of components or parts as the criteria for distinction. "Including" and "including" mentioned throughout the specification and claims are open-ended terms and should be interpreted as "including but not limited to". In addition, the word "connected" here includes any direct and indirect electrical connection means. Indirect electrical connection means include connection through other devices.

[0032] The embodiment of the utility model solves the problem of lack of pre-charging device for inverter capacitors stored for a long time in the prior art by providing a capacitor activation device.

[0033] The technical method of the utility model is to solve the above problems. The overall idea is as follows: the voltage is gradually increased through an adjustable transformer to charge the inverter DC circuit or capacitor group. During the charging process, a loop current is generated to make the bulb light up. When the bulb lights up, the voltage is manually stopped. After the voltage on both sides of the bulb is balanced, the light goes out. At this time, the voltage is gradually increased again for charging. This cycle is executed to achieve the purpose of safe charging.

[0034] Figure 1A The structure diagram of the capacitor activation device 1a disclosed in the first embodiment of the utility model includes a power module 10, a rectifier module 11 and a capacitor to be activated 12. The power module 10 is used to provide an adjustable voltage, such as an adjustable transformer. The rectifier module 11 couples the power module 10 and the capacitor to be activated 12. If the capacitor to be activated 12 is in a DC circuit, the rectifier module 11 adjusts the AC voltage provided by the power module 10 to a DC voltage.

[0035] Specifically, if Figure 2 As shown, the power module 10 may include an adjustable transformer AC1, a first switch (e.g., a circuit breaker QF1) connected in series with the adjustable transformer AC1, and a second transformer T1, wherein T1 may be a step-up transformer. The primary side of T1 is connected to the adjustable transformer AC1 and the first switch (e.g., a circuit breaker QF1) connected in series, and the secondary side is coupled to the rectifier module 11.

[0036] The rectifier module 11 can be a diode bridge rectifier circuit, such as Figure 2 As shown, it includes diodes VD1-VD4. Its input end is connected to the secondary side of the second transformer T1, and its output end is coupled to the capacitor 12 to be activated (for example, C1).

[0037] In the first embodiment, the voltage is gradually increased by the adjustable transformer AC1 and rectified by the diode bridge rectifier circuit to charge the capacitor 12 to be activated, thereby realizing the pre-charging of the capacitor in the DC circuit of the inverter.

[0038] Figure 1B This is a schematic diagram of the structure of a capacitor activation device 1b disclosed in Embodiment 2 of the present utility model. The capacitor activation device 1b includes a power module 10, a rectifier module 11, a capacitor to be activated 12, and a current limiting module 13. Among them, the power module 10 is used to provide an adjustable voltage, such as an adjustable transformer. The rectifier module 11 couples the power module 10 and the capacitor to be activated 12. If the capacitor to be activated 12 is in a DC circuit, the rectifier module 11 adjusts the AC voltage provided by the power module 10 to a DC voltage. The current limiting module 13 is used to limit the current in the circuit, and automatically disconnects when the current reaches a certain value, thereby protecting the circuit.

[0039] Specifically, if Figure 2 As shown, the power module 10 may include an adjustable transformer AC1, a first switch (e.g., a circuit breaker QF1) connected in series with the adjustable transformer AC1, and a second transformer T1, wherein T1 may be a step-up transformer. The primary side of T1 is connected to the adjustable transformer AC1 and the first switch (e.g., a circuit breaker QF1) connected in series, and the secondary side is coupled to the rectifier module 11.

[0040] The rectifier module 11 can be a diode bridge rectifier circuit, such as Figure 2 As shown, it includes diodes VD1 to VD4 , whose input end is connected to the secondary side of the second transformer T1 , and whose output end is coupled to the activated capacitor 12 (eg C1 ) through a current limiting module 13 (eg fuse FU1 ).

[0041] In the second embodiment, the voltage is gradually increased by the adjustable transformer AC1 and rectified by the diode bridge rectifier circuit to charge the capacitor 12 to be activated, thereby pre-charging the capacitor in the inverter DC circuit; and the current limiting module 13 is provided to protect the circuit.

[0042] Figure 1C This is a schematic diagram of the structure of the capacitor activation device 1 disclosed in the third embodiment of the present utility model. The capacitor activation device 1 includes a power module 10, a rectifier module 11, a capacitor to be activated 12, a current limiting module 13 and a display module 14. Among them, the power module 10 is used to provide an adjustable voltage, such as an adjustable transformer. The rectifier module 11 couples the power module 10 and the capacitor to be activated 12. If the capacitor to be activated 12 is in a DC circuit, the rectifier module 11 adjusts the AC voltage provided by the power module 10 to a DC voltage. The current limiting module 13 is used to limit the current in the circuit, and automatically disconnects when the current reaches a certain value, thereby protecting the circuit. The display module 14 is used to display the voltage in the charging circuit to achieve the effect of cyclic charging.

[0043] Specifically, if Figure 2 As shown, the power module 10 may include an adjustable transformer AC1, a first switch (e.g., a circuit breaker QF1) connected in series with the adjustable transformer AC1, and a second transformer T1, wherein T1 may be a step-up transformer. The primary side of T1 is connected to the adjustable transformer AC1 and the first switch (e.g., a circuit breaker QF1) connected in series, and the secondary side is coupled to the rectifier module 11.

[0044] The rectifier module 11 can be a diode bridge rectifier circuit, such as Figure 2 As shown, it includes diodes VD1 to VD4. Its input end is connected to the secondary side of the second transformer T1, and its output end is connected to the capacitor 12 (for example, C1) to be activated through a current limiting module 13 (for example, a fuse FU1) and a display module 14 (for example, a bulb R1).

[0045] like Figure 2 As shown, the working principle of the circuit corresponding to the capacitor activation device 1 of the utility model is: after the circuit breaker QF1 is closed, the adjustable transformer AC1 is manually boosted, and the primary side voltage U1 of the second transformer T1 is boosted to the secondary side voltage U2 through the transformer T1 (for example, 1:3 ratio), U2 is converted into direct current through the rectifier module 11, and the capacitor C1 to be activated is charged through the fuse FU1 and the bulb R1. During the charging process, the bulb R1 lights up under the action of the current, serving as an indicator and current limiter for the pre-charging circuit, thereby playing a role in protecting the circuit.

[0046] Specifically, the voltage is gradually increased through the adjustable transformer AC1 to charge the inverter DC circuit capacitor (such as C1) or capacitor group. During the charging process, a loop current is generated to make the bulb R1 light up. When the bulb R1 lights up, the voltage is manually stopped, and the bulb R1 is extinguished after the voltages on both sides are balanced. At this time, the voltage is gradually increased to charge the capacitor C1. This cycle is executed to achieve the purpose of safe charging.

[0047] Exemplarily, the specifications of circuit breaker QF1 are 2P, 220V, 5A; the voltage range of adjustable transformer AC1 is 0-220V; the transformation ratio of the second transformer T1 is 1:3, i.e. 0-660V; the sustainable current of VD1-VD4 in the diode bridge rectifier circuit is 5A; the current of fuse FU1 is 5A; the power of bulb R1 is 100W, and the capacitor C1 to be activated is the inverter DC circuit capacitor or capacitor group.

[0048] To sum up, in order to protect the inverter capacitor, the capacitor activation device of the utility model applies an adjustable voltage to the capacitor to be activated, and limits the current at the same time to prevent excessive current from causing impact on the capacitor to be activated, causing the capacitor to be activated to burn out and explode the machine, thereby solving the problem of capacitor failure due to long-term storage of inverter spare parts; in addition, the capacitor activation device of the utility model can test and diagnose the online inverter, which is convenient for fault handling.

[0049] The embodiments of the utility model are described above in conjunction with the accompanying drawings, but the utility model is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the utility model, ordinary technicians in this field can also make many forms without departing from the scope of protection of the utility model and the claims, all of which belong to the protection scope of the utility model.

Claims

1. A capacitor activation device, characterized in that: include: Power module, providing adjustable voltage; A rectifier module, coupled to the power module and the capacitor to be activated; as well as, A display module, coupled to the rectifier module and the capacitor to be activated, wherein the display module is a light bulb; The power supply module includes a first transformer, a first switch connected in series with the first transformer, and a second transformer, the primary side of the second transformer is connected to the first transformer and the first switch connected in series, the secondary side of the second transformer is coupled to the rectifier module, the first transformer is an adjustable transformer, and the second transformer is a step-up transformer.

2. The capacitor activation device according to claim 1, characterized in that: Also includes: The current limiting module is coupled to the rectifying module and the capacitor to be activated.

3. The capacitor activation device according to claim 1, characterized in that: The rectifier module is a diode bridge rectifier circuit, an input end of which is coupled to the power module, and an output end of which is coupled to the capacitor to be activated.

4. The capacitor activation device according to claim 1, characterized in that: The voltage adjustment range of the adjustable transformer is 0-220V.

5. The capacitor activation device according to claim 1, characterized in that: The first switch is a circuit breaker.

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