CN110635557B - Uninterruptible power supply and fuse fault detection method thereof - Google Patents
Uninterruptible power supply and fuse fault detection method thereof Download PDFInfo
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- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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Abstract
The invention provides an uninterruptible power supply and a fuse fault detection method thereof. This uninterrupted power source includes: the functional module comprises a fuse, a filtering unit and a functional unit which are sequentially connected from a first end to a second end; the first end of the first switch is connected with the first end of the first switch, the second end of the first switch is used for being connected with the bus, and the second end of the first switch is connected with an external power supply; a first sampling point and a second sampling point are respectively arranged at two ends of the first switch; one end of the slow-start module is connected with the second end of the first switch, and the other end of the slow-start module is connected with the filtering unit; an external power supply flows into the filtering unit through the slow-start module, and respectively flows into the fuse and the functional unit after passing through the filtering unit; and the comparison control module compares the voltages of the first sampling point and the second sampling point and controls the first switch according to the comparison result. The uninterrupted power supply can quickly judge whether the fuse in the functional module breaks down or not under the condition that the uninterrupted power supply is not disassembled, so that the fault detection operation of the uninterrupted power supply fuse is simple.
Description
Technical Field
The invention belongs to the technical field of power failure detection, and particularly relates to an uninterruptible power supply and a fuse failure detection method thereof.
Background
In a conventional Uninterruptible Power Supply (UPS), a fuse is arranged before an input switch of the UPS, and before the input switch is closed, the fuse needs to be ensured to be normal, otherwise, the UPS cannot be normally operated. Usually, a sampling point is arranged at the rear end of the fuse, and whether the fuse is normal or not is judged by judging whether the voltage of the sampling point is normal or not. However, for the modular UPS, filtering, rectifying, and inverting are packaged to form a module structure, and a fuse is usually disposed inside each module structure. If whether fuse is normal in the module to be detected, the module is usually required to be taken down and dismantled, and the voltage at the front end and the rear end of the fuse can be detected, so that the detection mode consumes time and labor and influences the normal operation of equipment.
Disclosure of Invention
In view of this, embodiments of the present invention provide an uninterruptible power supply and a fuse fault detection method thereof, so as to solve the problem in the prior art that a machine needs to be disassembled and a fuse needs to be detected by detecting voltages at front and rear ends of the fuse.
A first aspect of an embodiment of the present invention provides an uninterruptible power supply, including:
the functional module comprises a first end, a second end, and a fuse, a filtering unit and a functional unit which are sequentially connected from the first end to the second end; the first end of the first switch is connected with the first end of the first switch, and the second end of the first switch is used for being connected with a bus; the second end of the first switch is connected with an external power supply; the two ends of the second switch are respectively provided with a first sampling point and a second sampling point;
one end of the slow-rising module is connected with the second end of the first switch, and the other end of the slow-rising module is connected with the filtering unit; an external power supply flows into the filtering unit through the slow-start module, and respectively flows into the fuse and the functional unit after passing through the filtering unit;
and the comparison control module is connected with the first sampling point and the second sampling point and used for comparing the voltages of the first sampling point and the second sampling point and controlling the first switch according to a comparison result.
Optionally, the comparison control module is configured to:
when the voltage difference value between the first sampling point and the second sampling point is smaller than a preset value, after first preset time, controlling the first switch to be closed;
and when the voltage difference value between the first sampling point and the second sampling point is greater than or equal to a preset value, controlling the first switch to be switched off.
Optionally, the comparison control module includes:
the input end of the comparator is connected with the first sampling point and the second sampling point and is used for comparing the voltages of the first sampling point and the second sampling point;
and the controller is connected with the output end of the comparator and is used for controlling the first switch to be switched on or switched off according to the comparison result output by the comparator.
Optionally, the filtering unit includes a first inductor, a second inductor, and a first capacitor; the first inductor and the second inductor are connected in series, and the other end of the first inductor is connected with the fuse; the other end of the second inductor is connected with the functional unit; one end of the first capacitor is connected to a connection point of the first inductor and the second inductor, and the other end of the first capacitor is grounded.
Optionally, the number of the functional modules is multiple, and the functional modules are connected in parallel;
the slow-raising module comprises a slow-raising unit which can be connected with each functional module; or the slow-raising module comprises a plurality of slow-raising units, and each slow-raising unit is correspondingly connected with one functional module.
Optionally, the slow-start unit includes a second switch and a slow-start resistor connected in sequence, the other end of the second switch is connected with the first switch, and the other end of the slow-start resistor is connected with the filtering unit of the functional module.
Optionally, each of the functional modules is of a modular structure, and is provided with a socket correspondingly connected with the slow-start module, the first switch, the external bus and other functional modules.
Optionally, the socket includes a first socket for connecting with the slow-start module, a second socket for connecting with a first switch, a third socket for connecting with an external bus, and a fourth socket for connecting with other functional modules;
the first interface is also connected with a filtering unit in the same functional module, the second interface is also connected with a fuse in the same functional module, the third interface is also connected with a functional unit in the same functional module, and the fourth interface is also connected with an input end and an output end in the same functional module.
A second aspect of the embodiments of the present invention provides a method for detecting a fault of an uninterruptible power supply fuse, including:
the slow-start module works, an external power supply flows into the filtering unit through the slow-start module, and flows into the fuse and the functional unit respectively after passing through the filtering unit;
sampling a first sampling voltage of a first sampling point and a second sampling voltage of a second sampling point;
the comparison control module is used for comparing the voltage difference value of the first sampling voltage and the second sampling voltage, and when the voltage difference value is smaller than or equal to a preset value, the bus voltage is increased to the preset voltage after a first preset time, and the first switch is controlled to be closed, so that the uninterrupted power supply is started.
Optionally, the method for detecting a fault of an uninterruptible power supply fuse further includes:
and acquiring the current first sampling voltage and the second sampling voltage at intervals of a second preset time, comparing the voltage difference value of the current first sampling voltage and the current second sampling voltage through a comparison control module, and controlling the corresponding functional module to stop working when the voltage difference value is greater than a preset value.
In the embodiment of the invention, the uninterruptible power supply comprises a functional module, a slow-start module and a comparison control module, wherein the functional module comprises a first end, a second end, a fuse protector, a filtering unit and a functional unit which are sequentially connected from the first end to the second end; the first end of the first switch is connected with the first end of the first switch, and the second end of the first switch is connected with the bus; the second end of the first switch is connected with an external power supply, and the two ends of the second switch are respectively provided with a first sampling point and a second sampling point; one end of the slow-start module is connected with the second end of the first switch, and the other end of the slow-start module is connected with the filtering unit; an external power supply flows into the filtering unit through the slow-start module, and respectively flows into the fuse and the functional unit after passing through the filtering unit; the comparison control module compares the voltages of the first sampling point and the second sampling point and controls the second switch according to the comparison result.
In the embodiment of the invention, the slow-start module works, an external power supply flows into the filtering unit through slow start, and flows into the fuse and the functional unit respectively after passing through the filtering unit; then the first sampling voltage of the first sampling point and the second sampling voltage of the second sampling point are sampled, the voltage difference value of the first sampling voltage and the second sampling voltage is compared through the comparison control module, when the voltage difference value is smaller than or equal to a preset value, the bus voltage is increased to the preset voltage through first preset time, the first switch is controlled to be closed, the uninterrupted power supply is started, whether the fuse in the functional module breaks down or not can be quickly judged under the condition that the uninterrupted power supply fuse does not need to be disassembled, and the uninterrupted power supply fuse fault detection operation is simple.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a block diagram of an ups provided in an embodiment of the invention;
fig. 2 is a schematic flowchart of a method for detecting a fuse fault of an uninterruptible power supply according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
The uninterruptible power supply provided by the embodiment of the invention can comprise a functional module, a slow-start module and a comparison control module.
The functional module comprises a first end, a second end, and a fuse, a filtering unit and a functional unit which are sequentially connected from the first end to the second end; the first end of the first switch is connected with the first end of the first switch, and the second end of the first switch is used for being connected with a bus; the second end of the first switch is connected with an external power supply, and the two ends of the first switch are respectively provided with a first sampling point and a second sampling point.
One end of the slow-start module is connected with the second end of the first switch, and the other end of the slow-start module is connected with the filtering unit; and the external power supply flows into the filtering unit through the slow-start module and respectively flows into the fuse and the functional unit after passing through the filtering unit.
The comparison control module is connected with the first sampling point and the second sampling point and used for comparing the voltages of the first sampling point and the second sampling point and controlling the first switch according to a comparison result.
For the uninterruptible power supply, the slow-start module works, and an external power supply flows into the filtering unit through slow start and then flows into the fuse and the functional unit respectively after passing through the filtering unit; then the first sampling voltage of the first sampling point and the second sampling voltage of the second sampling point are sampled, the voltage difference value of the first sampling voltage and the second sampling voltage is compared through the comparison control module, when the voltage difference value is smaller than or equal to a preset value, the bus voltage is increased to the preset voltage through first preset time, and then the first switch is controlled to be closed, so that the uninterrupted power supply is started, whether the fuse in the functional module breaks down or not can be quickly judged under the condition that the uninterrupted power supply fuse does not need to be disassembled, and the uninterrupted power supply fuse can be easily subjected to fault detection.
In some embodiments, the functional unit may include a rectifying circuit and/or an inverting circuit, and the rectifying circuit and the inverting circuit may be connected by a bus capacitor.
Fig. 1 is a block diagram of an uninterruptible power supply according to an embodiment of the present invention, and referring to fig. 1, the uninterruptible power supply may include a plurality of functional modules (for example, functional module 1 to functional module n, where n is a positive integer), a soft start module 200, and a comparison control module 300.
Each functional module comprises a first end, a second end, and a fuse 101, a filtering unit 102 and a functional unit 103 which are sequentially connected from the first end to the second end. The first end of the functional module is connected with the first end of the first switch K1, and the second end of the functional module is used for being connected with the bus bar 400; the second end of the first switch K1 is connected to an external power source, and the two ends of the first switch K1 are respectively provided with a first sampling point a and a second sampling point B.
One end of the slow-start module 200 is connected to the second end of the first switch K1, and the other end is connected to the filtering unit 102; the external power flows into the filtering unit 102 through the slow-start module 200, and flows into the fuse 101 and the functional unit 103 after passing through the filtering unit 102.
The comparison control module 300 is connected to the first sampling point a and the second sampling point B, and configured to compare a voltage difference between the first sampling point a and the second sampling point B, and control the first switch K1 according to a comparison result.
The method comprises the following steps of detecting the starting process of the uninterruptible power supply as follows:
the slow start module 200 works, and an external power supply flows into the filtering unit 102 through the slow start module 200, and flows into the fuse 101 and the functional unit 103 after passing through the filtering unit 102;
sampling a first sampling voltage of a first sampling point A and a second sampling voltage of a second sampling point B;
comparing the voltage difference value between the first sampling voltage and the second sampling voltage through the comparison control module 300, and when the voltage difference value is smaller than or equal to a preset value, indicating that the fuse 101 in the functional module is normal, increasing the bus voltage to a preset voltage after a first preset time, then controlling the first switch K1 to be closed, and simultaneously outputting rectification and inversion drive to realize the start of the uninterruptible power supply; and if the voltage difference value is larger than the preset value, indicating that the fuse 101 in the functional module has a fault, taking down the functional module for maintenance.
In the operation process of the uninterruptible power supply, the current first sampling voltage and the current second sampling voltage are periodically collected (for example, at preset time intervals), the voltage difference value between the current first sampling voltage and the current second sampling voltage is compared through the comparison control module 300, when the voltage difference value is greater than the preset value, the corresponding functional module is controlled to stop working (for example, rectification and inversion driving of the corresponding functional module is turned off), and the functional module is taken down for maintenance.
In some embodiments, the comparison control module 300 may be specifically configured to:
when the voltage difference value between the first sampling point and the second sampling point is smaller than a preset value, after first preset time, controlling the first switch K1 to be closed;
and when the voltage difference value between the first sampling point and the second sampling point is greater than or equal to a preset value, controlling the first switch K1 to be switched off.
In some embodiments, the comparison control module 300 may include a comparator and a controller. The input end of the comparator is connected with the first sampling point and the second sampling point and is used for comparing the voltage difference value of the first sampling point A and the second sampling point B; the controller is connected with the output end of the comparator and is used for controlling the first switch K1 to be closed or opened according to the comparison result output by the comparator. For example, when the voltage difference is smaller than a preset value, after a first preset time, the first switch K1 is controlled to be closed; and when the voltage difference is greater than or equal to a preset value, controlling the first switch K1 to be switched off.
Referring to fig. 1, in some embodiments, the filter unit 102 may include a first inductor L1, a second inductor L2, and a first capacitor C1. The first inductor L1 and the second inductor L2 are connected in series, and the other end of the first inductor L1 is connected with the fuse 101; the other end of the second inductor L2 is connected to the functional unit 103; one end of the first capacitor C1 is connected to the connection point of the first inductor L1 and the second inductor L2, and the other end of the first capacitor C1 is grounded.
Illustratively, one end of the soft start module 200 is connected to the first switch K1, and the other end is connected to a connection point of the first inductor L1 and the second inductor L2.
Alternatively, referring to fig. 1, the second terminal of the first switch K1 may be the first sample a, and the first terminal of each functional module may be the second sample B.
Optionally, the number of the functional modules may be multiple, and the functional modules are connected in parallel;
the slow-raising module comprises a slow-raising unit which can be connected with each functional module; or the slow-raising module comprises a plurality of slow-raising units, and each slow-raising unit is correspondingly connected with one functional module.
If the slow-start unit is adopted, the slow-start unit can be connected with the plug-in interface at the filtering unit of each functional module, and the pressure difference between two ends of the fuse of each functional module is detected; or the slow-start unit is sequentially connected with the plug-in interface at the filtering unit of each functional module, so that the slow-start unit is saved.
In the above embodiments, the number of the functional modules may be one or more. In the case of a plurality of functional modules (for example, from functional module 1 to functional module n, n is greater than or equal to 2), the functional modules are connected in parallel, and the slow-up module 200 includes a slow-up unit that can be connected to each functional module; or the cache module 200 includes a plurality of cache units, and each cache unit is correspondingly connected to one functional module.
Referring to fig. 1, the soft start unit includes a second switch K2 and a soft start resistor R1 which are connected in sequence, and the other end of the second switch K2 is connected with the first switch K1, and the other end of the soft start resistor R1 is connected with the filtering unit 102 of the functional module.
Specifically, when the slow-start module 200 includes one slow-start unit, the other end of the slow-start resistor R1 of the slow-start unit can be connected to the filtering unit 102 of each functional module, for example, a connection manner such as plugging can be used to facilitate switching; when the ramp-up module 200 includes a plurality of ramp-up units, each of the ramp-up units is connected to a corresponding functional module, and the other end of the ramp-up resistor R1 of each of the ramp-up units is connected to the filtering unit 102 of the corresponding functional module.
In this embodiment, the slow-start resistor R1 may be a single resistor, or may be composed of a plurality of resistors connected in series and/or in parallel, which is not limited to this.
Optionally, each of the functional modules may be of a modular structure, and is provided with a socket correspondingly connected to the slow-start module 200, the first switch K1, the external bus 400, and other functional modules. Through above-mentioned interface, can dismantle function module or install in uninterrupted power source from uninterrupted power source fast and conveniently.
Illustratively, the sockets may include a first socket for connecting with the slow-raising module 200, a second socket for connecting with the first switch K1, a third socket for connecting with the external bus bar 400, and a fourth socket for connecting with other functional modules. The first interface is further connected with a filtering unit 102 in the same functional module, the second interface is further connected with a fuse 101 in the same functional module, the third interface is further connected with a functional unit 103 in the same functional module, and the fourth interface is further connected with an input end and an output end in the same functional module.
Corresponding to any one of the above uninterruptible power supplies, an embodiment of the present invention further provides a method for detecting a fuse fault of an uninterruptible power supply, and referring to fig. 2, the method for detecting a fuse fault of an uninterruptible power supply is detailed as follows:
and S101, the slow-start module works, an external power supply flows into the filtering unit through the slow-start module, and flows into the fuse and the functional unit respectively after passing through the filtering unit.
Step S102, a first sampling voltage of a first sampling point and a second sampling voltage of a second sampling point are sampled.
Step S103, comparing the voltage difference value of the first sampling voltage and the second sampling voltage through the comparison control module, and when the voltage difference value is smaller than or equal to a preset value, raising the bus voltage to the preset voltage through a first preset time, and controlling the first switch to be closed so as to start the uninterruptible power supply.
Optionally, the method for detecting a fault of an uninterruptible power supply fuse may further include:
and acquiring the current first sampling voltage and the second sampling voltage at intervals of a second preset time, comparing the voltage difference value of the current first sampling voltage and the current second sampling voltage through a comparison control module, and controlling the corresponding functional module to stop working when the voltage difference value is greater than a preset value.
Specifically, in the starting process of the uninterruptible power supply, the slow-start module works, an external power supply flows into the filtering unit through the slow-start module, and flows into the fuse and the functional unit respectively after passing through the filtering unit; sampling a first sampling voltage of a first sampling point A and a second sampling voltage of a second sampling point B, comparing a voltage difference value of the first sampling voltage and the second sampling voltage through a comparison control module 300, indicating that a fuse in the functional module is normal when the voltage difference value is less than or equal to a preset value, increasing the bus voltage to the preset voltage after a first preset time, controlling a first switch K1 to be closed, and outputting rectification and inversion drive to start the uninterruptible power supply; and if the voltage difference value is larger than the preset value, indicating that the fuse in the functional module breaks down, and taking down the functional module for maintenance.
In the operation process of the uninterruptible power supply, the current first sampling voltage and the current second sampling voltage are periodically collected (for example, at preset time intervals), the voltage difference value between the current first sampling voltage and the current second sampling voltage is compared through the comparison control module 300, when the voltage difference value is greater than the preset value, the corresponding functional module is controlled to stop working (for example, rectification and inversion driving of the corresponding functional module is turned off), and the functional module is taken down for maintenance.
When the slow-start module comprises a slow-start unit, the method for detecting the fault of the fuse of the uninterruptible power supply can comprise the following steps:
connecting the slow-start unit with the interface at the filtering unit of each functional module, wherein an external power supply flows into the filtering unit through the slow-start module and respectively flows into the fuse and the functional unit after passing through the filtering unit;
collecting the pressure difference of two ends of a fuse of each functional module;
the comparison control module is used for comparing the voltage difference between two ends of the fuse, and when the voltage difference is smaller than or equal to a preset value, the bus voltage is increased to a preset voltage after a first preset time, and the first switch is controlled to be closed, so that the uninterrupted power supply is started.
When the slow-start module comprises a slow-start unit, the method for detecting the fault of the fuse of the uninterruptible power supply can comprise the following steps:
the slow-start unit is sequentially connected with the inserting port at the filtering unit of each functional module, an external power supply flows into the filtering unit through the slow-start module and respectively flows into the fuse and the functional units after passing through the filtering unit;
collecting the pressure difference of two ends of a fuse of each functional module;
the comparison control module is used for comparing the voltage difference between two ends of the fuse, and when the voltage difference is smaller than or equal to a preset value, the bus voltage is increased to a preset voltage after a first preset time, and the first switch is controlled to be closed, so that the uninterrupted power supply is started.
When the slow-start module comprises a plurality of slow-start units, the method for detecting the fault of the fuse of the uninterruptible power supply can comprise the following steps:
connecting the plurality of slow-start units with the corresponding interfaces at the filtering units of each functional module, wherein an external power supply flows into the filtering units through the slow-start modules and respectively flows into the fuses and the functional units after passing through the filtering units;
collecting the pressure difference of two ends of a fuse of each functional module;
the comparison control module is used for comparing the voltage difference between two ends of the fuse, and when the voltage difference is smaller than or equal to a preset value, the bus voltage is increased to a preset voltage after a first preset time, and the first switch is controlled to be closed, so that the uninterrupted power supply is started.
The method for detecting the fault of the fuse of the uninterruptible power supply can quickly judge whether the fuse in the functional module breaks down or not without disassembling the fuse, so that the fault detection operation of the fuse of the uninterruptible power supply is simple.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. An uninterruptible power supply, comprising:
the functional module comprises a first end, a second end, and a fuse, a filtering unit and a functional unit which are sequentially connected from the first end to the second end; the first end of the first switch is connected with the first end of the first switch, and the second end of the first switch is used for being connected with a bus; the second end of the first switch is connected with an external power supply; the two ends of the first switch are respectively provided with a first sampling point and a second sampling point;
one end of the slow-rising module is connected with the second end of the first switch, and the other end of the slow-rising module is connected with the filtering unit; an external power supply flows into the filtering unit through the slow-start module, and respectively flows into the fuse and the functional unit after passing through the filtering unit;
and the comparison control module is connected with the first sampling point and the second sampling point and used for comparing the voltages of the first sampling point and the second sampling point and controlling the first switch according to a comparison result.
2. The uninterruptible power supply of claim 1, wherein the comparison control module is to:
when the voltage difference value between the first sampling point and the second sampling point is smaller than a preset value, after first preset time, controlling the first switch to be closed;
and when the voltage difference value between the first sampling point and the second sampling point is greater than or equal to a preset value, controlling the first switch to be switched off.
3. The uninterruptible power supply of claim 1, wherein the comparison control module comprises:
the input end of the comparator is connected with the first sampling point and the second sampling point and is used for comparing the voltages of the first sampling point and the second sampling point;
and the controller is connected with the output end of the comparator and is used for controlling the first switch to be switched on or switched off according to the comparison result output by the comparator.
4. The uninterruptible power supply of claim 1, wherein the filtering unit includes a first inductor, a second inductor, and a first capacitor; the first inductor and the second inductor are connected in series, and the other end of the first inductor is connected with the fuse; the other end of the second inductor is connected with the functional unit; one end of the first capacitor is connected to a connection point of the first inductor and the second inductor, and the other end of the first capacitor is grounded.
5. The uninterruptible power supply of claim 1, wherein there are a plurality of functional modules, each of which is connected in parallel with each other;
the slow-raising module comprises a slow-raising unit which can be connected with each functional module; or the slow-raising module comprises a plurality of slow-raising units, and each slow-raising unit is correspondingly connected with one functional module.
6. The uninterruptible power supply of claim 5, wherein the slow-start unit includes a second switch and a slow-start resistor connected in sequence, and the other end of the second switch is connected to the first switch, and the other end of the slow-start resistor is connected to the filtering unit of the functional module.
7. The uninterruptible power supply according to any one of claims 1 to 6, wherein each of the functional modules is of a modular structure and is provided with a socket corresponding to the slow-start module, the first switch, the external bus, and the other functional modules.
8. The uninterruptible power supply of claim 7, wherein the sockets include a first socket for connecting with the soft-start module, a second socket for connecting with a first switch, a third socket for connecting with an external bus, and a fourth socket for connecting with other functional modules;
the first interface is also connected with a filtering unit in the same functional module, the second interface is also connected with a fuse in the same functional module, the third interface is also connected with a functional unit in the same functional module, and the fourth interface is also connected with an input end and an output end in the same functional module.
9. A method for detecting fuse failure of an uninterruptible power supply, which is applied to the uninterruptible power supply of any one of claims 1 to 8, the fuse failure detection comprising:
the slow-start module works, an external power supply flows into the filtering unit through the slow-start module, and flows into the fuse and the functional unit respectively after passing through the filtering unit;
sampling a first sampling voltage of a first sampling point and a second sampling voltage of a second sampling point;
the comparison control module is used for comparing the voltage difference value of the first sampling voltage and the second sampling voltage, and when the voltage difference value is smaller than or equal to a preset value, the bus voltage is increased to the preset voltage after a first preset time, and the first switch is controlled to be closed, so that the uninterrupted power supply is started.
10. The method for uninterruptible power supply fuse fault detection according to claim 9, further comprising:
and acquiring the current first sampling voltage and the second sampling voltage at intervals of a second preset time, comparing the voltage difference value of the current first sampling voltage and the current second sampling voltage through a comparison control module, and controlling the corresponding functional module to stop working when the voltage difference value is greater than a preset value.
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