CN215120269U - Uninterrupted power supply system - Google Patents
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- CN215120269U CN215120269U CN202121654125.8U CN202121654125U CN215120269U CN 215120269 U CN215120269 U CN 215120269U CN 202121654125 U CN202121654125 U CN 202121654125U CN 215120269 U CN215120269 U CN 215120269U
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Abstract
The utility model discloses an uninterrupted power source power supply system, including mains power supply, rectifier, dc-to-ac converter, battery supply circuit and interchange bypass power supply channel and consumer. Under normal conditions, a mains supply supplies power to the electric equipment through a rectifier and an inverter; when the commercial power supply and/or the rectifier have faults, the storage battery pack provides direct current for the inverter, so that normal alternating current is output through the inverter to supply power for the electric equipment; when the inverter fails, the commercial power supply supplies power to the electric equipment through the alternating current bypass power supply channel. Therefore, the three power supply modes are provided in the application, and the corresponding device can be switched to another power supply mode to supply power for the electric equipment when the corresponding device breaks down, so that uninterrupted power supply for the electric equipment is guaranteed, and normal work of the electric equipment is guaranteed.
Description
Technical Field
The utility model relates to a power supply field especially relates to an uninterrupted power source power supply system.
Background
With the continuous development of information technology and the increasing popularization of computers, the requirements of some high and new technology products and important equipment on the power supply quality are higher and higher. If the power supply is interrupted suddenly or the power supply quality does not meet the standard requirements of the electric equipment, a light person can cause data loss of the electric equipment, abnormal system operation or unqualified products, and in a serious case, the system can be paralyzed, so that loss which is difficult to estimate is caused.
When the electric equipment is normally powered on, the supplied alternating current cannot meet the requirements of the electric equipment due to the influence of natural disasters such as wind, electricity, thunder, rain and the like, certain human factors or other accidents, so that the electric equipment cannot normally work. Therefore, there is a need for an uninterruptible power supply system to ensure uninterrupted power supply to the electrical devices.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an uninterrupted power source power supply system provides three kinds of power supply modes, can switch to another kind of power supply mode for the consumer supplies power when corresponding device breaks down to guarantee the normal work of consumer for the uninterrupted power supply of consumer.
In order to solve the technical problem, the utility model provides an uninterrupted power source power supply system, include:
a mains supply and an electric device;
the rectifier is connected with the mains supply and used for rectifying alternating current output by the mains supply into direct current;
the inverter is arranged between the rectifier and the electric equipment and used for inverting the direct current output by the rectifier or the direct current output by the storage battery pack into alternating current based on the parameters of the electric equipment so as to supply power to the electric equipment;
the storage battery pack is connected with the inverter and is used for outputting direct current when the commercial power supply and/or the rectifier have faults;
and the alternating current bypass power supply channel is arranged between the commercial power supply and the electric equipment and is used for supplying power to the electric equipment by using the alternating current output by the commercial power supply when the inverter fails.
Preferably, the method further comprises the following steps:
and the capacitor with the first end connected with the output end of the rectifier and the second end grounded is used for filtering the direct current output by the rectifier.
Preferably, the method further comprises the following steps:
the charger is used for converting alternating current output by the mains supply into direct current to charge the storage battery pack when the mains supply is not in fault.
Preferably, the method further comprises the following steps:
and the first conversion switch circuit is respectively connected with the storage battery pack, the rectifier and the inverter and used for conducting a circuit between the rectifier and the inverter when the mains supply and the rectifier are not in fault and conducting a circuit between the storage battery pack and the inverter when the mains supply and/or the rectifier are in fault.
Preferably, the method further comprises the following steps:
and the diode is used for isolating the direct-current power circuit between the storage battery pack and the rectifier and the inverter.
Preferably, the method further comprises the following steps:
and the second change-over switch circuit is respectively connected with the inverter, the alternating current bypass power supply channel and the electric equipment and is used for conducting a circuit between the inverter and the electric equipment when the inverter is not in fault and conducting a circuit between the alternating current bypass power supply channel and the electric equipment when the inverter is in fault.
Preferably, the second changeover switch circuit includes:
the first switch is connected with the inverter at a first end and connected with the electric equipment at a second end and is used for conducting when the inverter is not in fault;
and the second switch is used for conducting when the inverter fails.
Preferably, the method further comprises the following steps:
the monitoring circuit is connected with the inverter and is used for monitoring the output voltage of the inverter;
the control circuit is respectively connected with the monitoring circuit and the second change-over switch and is used for controlling the first switch to be closed and controlling the second switch to be opened when the inverter is monitored to be not in fault based on the output voltage of the inverter; and controlling the second switch to be closed and the first switch to be opened when the inverter fault is monitored based on the output voltage of the inverter.
Preferably, the rectifier is a single-phase bridge rectifier circuit.
Preferably, the method further comprises the following steps:
and the filter is used for filtering the alternating current output by the mains supply.
The application provides an uninterruptible power supply system, which comprises a mains supply, a rectifier, an inverter, a battery power supply circuit, an alternating current bypass power supply channel and electric equipment. Under normal conditions, a mains supply supplies power to the electric equipment through a rectifier and an inverter; when the commercial power supply and/or the rectifier have faults, the storage battery pack provides direct current for the inverter, so that normal alternating current is output through the inverter to supply power for the electric equipment; when the inverter fails, the commercial power supply supplies power to the electric equipment through the alternating current bypass power supply channel. Therefore, the three power supply modes are provided in the application, and the corresponding device can be switched to another power supply mode to supply power for the electric equipment when the corresponding device breaks down, so that uninterrupted power supply for the electric equipment is guaranteed, and normal work of the electric equipment is guaranteed.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the prior art and the embodiments are briefly introduced 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 without creative efforts.
Fig. 1 is a schematic structural diagram of an uninterruptible power supply system according to the present invention;
fig. 2 is a specific schematic structural diagram of an uninterruptible power supply system according to the present invention.
Detailed Description
The core of the utility model is to provide an uninterrupted power source power supply system provides three kinds of power supply modes, can switch to another kind of power supply mode for the consumer supplies power when corresponding device breaks down to guarantee the normal work of consumer for the uninterrupted power supply of consumer.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an uninterruptible power supply system according to the present invention, the system includes:
a mains supply 1 and a consumer 6;
the rectifier 2 is connected with the commercial power supply 1 and used for rectifying alternating current output by the commercial power supply 1 into direct current;
the inverter 3 is arranged between the rectifier 2 and the electric equipment 6 and is used for inverting the direct current output by the rectifier 2 or the direct current output by the storage battery pack 4 into alternating current based on the parameters of the electric equipment 6 so as to supply power to the electric equipment 6;
the storage battery pack 4 is connected with the inverter 3 and is used for outputting direct current when the commercial power supply 1 and/or the rectifier 2 are failed;
and the alternating current bypass power supply channel 5 is arranged between the commercial power supply 1 and the electric equipment 6 and is used for supplying power to the electric equipment 6 by using alternating current output by the commercial power supply 1 when the inverter 3 fails.
The applicant considers that some electric devices 6 in the prior art need a power supply to supply power uninterruptedly to maintain normal operation of the electric devices, for example, a PLC (Programmable Logic Controller) must supply power uninterruptedly when operating, otherwise, the electric devices cannot control the controlled device normally, and cannot meet the use requirement of the user.
In order to solve the technical problems, the present application provides three power supply circuits, which respectively rectify the alternating current output by the mains supply 1 into direct current by the rectifier 2, and then invert the direct current into alternating current corresponding to parameters of the electric equipment 6 by the inverter 3, so as to supply power to the electric equipment 6; secondly, when the commercial power supply 1 and/or the rectifier 2 are in failure, the storage battery pack 4 outputs direct current to the inverter 3, so that the inverter 3 outputs alternating current corresponding to the parameters of the electric equipment 6, and the electric equipment 6 is powered; finally, when inverter 3 trouble, no matter mains supply 1 and rectifier 2, still storage battery 4 can not be for consumer 6 power supply through inverter 3, in order to guarantee the uninterrupted power supply to consumer 6, in this application with connecting through exchanging bypass power supply channel 5 between mains supply 1 and the consumer 6 to guarantee the uninterrupted power supply of mains supply 1 to consumer 6.
It should be noted that a voltage monitoring device may be provided, and whether the ac output by the utility power supply 1 is normal or not is monitored, so as to determine whether the utility power supply 1 fails or not, and correspondingly, whether the rectifier 2 and the inverter 3 fail or not is determined by respectively monitoring the dc output by the rectifier 2 and the ac output by the inverter 3.
In addition, a switch module can be arranged between the rectifier 2 and the storage battery pack 4 as well as between the inverter 3, so as to realize the switching of the power supply circuit, and correspondingly, a switch module is also arranged between the inverter 3 and the alternating current bypass power supply channel 5 as well as between the inverter 3 and the electric equipment 6, so as to realize the switching of the power supply circuit.
It should be further noted that the storage battery pack 4 may also be connected to the utility power supply 1 through a charger 8, when the utility power supply 1 is normal, the charger 8 charges the storage battery pack 4 through the utility power supply 1, and when the utility power supply 1 and/or the rectifier 2 fails, the dc power is output to supply power to the electric equipment 6 through the inverter 3.
When inverting the direct current input to the inverter 3, the direct current is inverted into a voltage-stabilizing and frequency-stabilizing alternating current based on the parameters of the electric equipment 6, so as to ensure stable power supply for the electric equipment 6.
In addition, when the output end of the inverter 3 is overloaded or short-circuited, the power supply circuit is switched to supply the electric equipment 6 by the alternating current bypass power supply channel 5. When the ambient temperature is too high and the cooling fan fails, which causes the temperature of the power switch tube in the rectifier 2 or the inverter 3 to exceed the temperature limit, the power supply circuit is also switched to supply the electric equipment 6 with power from the alternating current bypass power supply channel 5.
In addition, the rated voltage of the utility power supply 1 in the present application is 220V, the rectifier 2 is a single-phase bridge rectifier circuit, the dc power supply voltage output by the rectifier 2 is 220V, and the battery voltage of the battery pack 4 is 220V.
The output voltage of the uninterruptible power supply system is not interrupted, so that the quality of the voltage during power supply is ensured, the reliability of the uninterruptible power supply system is enhanced, and the normal and stable operation of the electric equipment 6 is ensured; and the quality of the output electric energy of the uninterruptible power supply system is high, and the inverter 3 adopts high-frequency sine pulse width modulation and output waveform feedback control, so that high-quality electric energy with high voltage stability, small waveform distortion rate, stable frequency and high dynamic response speed can be provided for the electric equipment 6.
In summary, the present application provides three power supply modes, which can be switched to another power supply mode to supply power to the electrical equipment 6 when a corresponding device fails, so as to ensure uninterrupted power supply for the electrical equipment 6 and ensure normal operation of the electrical equipment 6.
On the basis of the above-described embodiment:
as a preferred embodiment, the method further comprises the following steps:
and the capacitor C with the first end connected with the output end of the rectifier 2 and the second end grounded is used for filtering the direct current output by the rectifier 2.
Referring to fig. 2, fig. 2 is a schematic structural diagram of an uninterruptible power supply system according to the present invention.
In this embodiment, the output end of the rectifier 2 is further connected to a capacitor C, which can filter out high-frequency ripples in the direct current output by the rectifier 2, so as to reduce noise waves input to the inverter 3, thereby ensuring the quality of the direct-current power supply voltage.
As a preferred embodiment, the method further comprises the following steps:
and the charger 8 is connected with the mains supply 1 at the input end and the storage battery pack 4 at the output end, and is used for converting alternating current output by the mains supply 1 into direct current to charge the storage battery pack 4 when the mains supply 1 is not in fault.
In this embodiment, a charger 8 is further provided, the charger 8 is connected to the mains supply 1, when the mains supply 1 and the rectifier 2 are both normal, the inverter 3 converts the direct current output by the rectifier 2 into alternating current to supply power to the power consumption device 6, and at this time, the storage battery pack 4 does not need to output the direct current, so as to avoid reduction of the cruising ability of the storage battery pack 4 when the storage battery pack 4 is idle and discharges itself to supply power to the power consumption device 6, when the mains supply 1 is normal, the charger 8 converts the alternating current output by the mains supply 1 into direct current to charge the storage battery pack 4, and when the electric energy of the storage battery pack 4 is close to full charge, for example, when the preset floating charge voltage value is reached, the charger 8 charges the storage battery pack 4 by a continuous and long-time constant-voltage charging method, that is, performs floating charge on the storage battery pack 4, thereby ensuring the continuous full-charge state of the storage battery pack 4, there is no damage to the battery pack 4 due to continuous charging. And when the commercial power supply 1 fails, the charger 8 stops charging the storage battery pack 4, and the storage battery pack 4 outputs the electric energy stored in the storage battery pack 4, so that the inverter 3 converts the direct current output by the storage battery pack 4 into alternating current to supply power to the electric equipment 6, and the normal operation of the electric equipment 6 is ensured.
It should be noted that the failure of the utility power supply 1 includes the interruption of the power supply of the utility power supply 1, and the output voltage is too high or too low.
As a preferred embodiment, the method further comprises the following steps:
and the first conversion switch circuit is respectively connected with the storage battery pack 4, the rectifier 2 and the inverter 3 and is used for conducting a circuit between the rectifier 2 and the inverter 3 when the commercial power supply 1 and the rectifier 2 are not in fault, and conducting a circuit between the storage battery pack 4 and the inverter 3 when the commercial power supply 1 and/or the rectifier 2 are in fault.
In the embodiment, a first conversion switch circuit is arranged among the storage battery pack 4, the rectifier 2 and the inverter 3, when the commercial power supply 1 and the rectifier 2 both keep normal operation, the first conversion switch circuit conducts the circuit between the rectifier 2 and the inverter 3, and disconnects the circuit between the storage battery pack 4 and the inverter 3, so that the rectifier 2 outputs direct current, and power is supplied to the electric equipment 6 through the inverter 3; when any one of the commercial power supply 1 and the rectifier 2 has a fault, the first conversion switch circuit disconnects the circuit between the rectifier 2 and the inverter 3, and switches on the circuit between the storage battery pack 4 and the inverter 3, so that the storage battery pack 4 outputs direct current, power is supplied to the electric equipment 6 through the inverter 3, switching of a power supply circuit is realized, and uninterrupted power supply for the electric equipment 6 is ensured.
As a preferred embodiment, the method further comprises the following steps:
and a diode D with the anode connected with the storage battery pack 4 and the cathode connected with the inverter 3 is used for isolating a direct current power circuit between the storage battery pack 4 and the inverter 3. The diode has one-way conductivity, and the diode D can realize backflow prevention so as to ensure that the direct-current power supply can only supply power to the inverter 3 through the storage battery pack 4.
As a preferred embodiment, the method further comprises the following steps:
and a second change-over switch circuit connected to the inverter 3, the ac bypass power supply path 5, and the electric equipment 6, respectively, for conducting a circuit between the inverter 3 and the electric equipment 6 when the inverter 3 is not failed, and conducting a circuit between the ac bypass power supply path 5 and the electric equipment 6 when the inverter 3 is failed.
In the embodiment, a second change-over switch circuit is arranged among the inverter 3, the alternating current bypass power supply channel 5 and the electric equipment 6, when the inverter 3 works normally, the second change-over switch circuit conducts the circuit between the inverter 3 and the electric equipment 6, and disconnects the circuit between the alternating current bypass power supply channel 5 and the electric equipment 6, so that the inverter 3 supplies power to the electric equipment 6; when the inverter 3 fails, the second change-over switch disconnects a circuit between the inverter 3 and the electric equipment 6, and switches on a circuit between the alternating current bypass power supply channel 5 and the electric equipment 6, so that the alternating current bypass power supply channel 5 supplies power to the electric equipment 6, switching of a power supply circuit is realized, and uninterrupted power supply for the electric equipment 6 is guaranteed.
As a preferred embodiment, the second changeover switch circuit includes:
a first switch K1 having a first end connected to the inverter 3 and a second end connected to the electric equipment 6, for conducting when the inverter 3 is not in fault;
and a second switch K2 having a first end connected to the ac bypass power supply path 5 and a second end connected to a second end of the first switch K1, for conducting when the inverter 3 fails.
The second switching switch circuit in this embodiment is composed of a first switch K1 and a second switch K2, when the inverter 3 works normally, the first switch K1 is closed, and the second switch K2 is opened, so as to realize the conduction of the circuit between the inverter 3 and the electric equipment 6, and the disconnection of the circuit between the ac bypass power supply channel 5 and the electric equipment 6, so that the inverter 3 supplies power to the electric equipment 6; when the inverter 3 fails, the second switch K2 is closed, and the first switch K1 is opened, so that the circuit between the inverter 3 and the electric equipment 6 is disconnected, and the circuit between the ac bypass power supply channel 5 and the electric equipment 6 is connected, so that the ac bypass power supply channel 5 supplies power to the electric equipment 6, the switching of the power supply circuit is realized, and the uninterrupted power supply of the electric equipment 6 is ensured.
However, whether the ac bypass feeding path 5 is switched to the output of the inverter 3 or the output of the inverter 3 is switched to the output of the ac bypass feeding path 5, it is generally difficult to achieve an ideal switching state in which one switch is just opened and the other switch is immediately closed due to non-idealities of the first switch K1 and the second switch K2. Thus, during the switching process, it may happen that one switch is turned off and the other is not turned on, which causes a momentary interruption of the power supply, which is not allowed for important consumers 6 (such as PLCs), which may otherwise have serious consequences during the switching process. On the other hand, it may happen that one switch is not yet turned off and the other switch is already turned on, which may cause a phenomenon that two power supply channels are connected in parallel to supply power to the electrical device 6 during the switching process. If the outputs of the two power supply circuits are synchronous at the moment, no circulating current exists between the two power supply circuits, otherwise, circulating current is generated between the two power supply circuits, and switch damage or inverter 3 failure can be caused when the circulating current is serious.
For the above reasons, when the second transfer switch circuit switches the two power supply circuits, the two power supply circuits are preferably synchronized and then switched. However, even if a phase-locked synchronization link is set in the uninterruptible power supply system, complete synchronization of the two power supply circuits is difficult to achieve, and thus, a circulating current at the switching moment or a high induced voltage at the end of the electric device 6 at the switching moment may still occur. The switch and the inverter 3 can be damaged due to the occurrence of a circulating current or the high voltage at the end of the electric equipment 6, so that the switch is preferably switched at the moment of zero crossing of the current of the electric equipment 6. The mutual safe conversion between the output of the alternating current bypass power supply channel 5 and the output of the inverter 3 can be realized by meeting the conditions.
In the prior art, the second transfer switch circuit can be classified into a mechanical type and an electronic type according to the different execution transfer elements used. The mechanical change-over switch is mainly composed of executing elements such as relays or contactors and is characterized in that a control circuit is simple, the failure rate is low, the switching time is long, and the service life of the switch is short; the electronic change-over switch has the features of fast switching speed, no contact with spark, complicated control circuit, poor shock resistance and great power consumption. The second change-over switch circuit is designed as a hybrid change-over switch, and combines the characteristics of a mechanical change-over switch and an electronic change-over switch to be used in parallel. When the hybrid transfer switch is switched on, the electronic transfer switch is firstly actuated, then the mechanical transfer switch is actuated, and when the hybrid transfer switch is switched off, the other way round is the opposite. This provides the advantage of combining mechanical and electronic switching of the hybrid switch.
As a preferred embodiment, the method further comprises the following steps:
a monitoring circuit connected to the inverter 3 for monitoring an output voltage of the inverter 3;
the control circuit is respectively connected with the monitoring circuit and the second change-over switch and is used for controlling the first switch K1 to be closed and controlling the second switch K2 to be opened when the inverter 3 is monitored to be not in fault based on the output voltage of the inverter 3; the second switch K2 is controlled to be closed and the first switch K1 is controlled to be opened when the inverter 3 is monitored to be out of order based on the output voltage of the inverter 3.
In this embodiment, a monitoring circuit is provided, which can monitor the output voltage of the inverter 3, and determine whether the inverter 3 has a fault by the control power, so as to control the first switch K1 and the second switch K2 in the second transfer switch circuit based on the determination result, thereby realizing switching of the power supply circuit.
As a preferred embodiment, the rectifier 2 is a single-phase bridge rectifier circuit.
As a preferred embodiment, the method further comprises the following steps:
and the filter 7 is connected with the first end of the commercial power supply 1, and the second end of the filter 7 is connected with the rectifier 2, the storage battery pack 4 and the alternating current bypass power supply channel 5, and is used for filtering alternating current output by the commercial power supply 1.
In this embodiment, the output end of the utility power supply 1 is further provided with a filter 7, which can filter out clutter in the alternating current output by the utility power supply 1, so as to ensure that the subsequent inverter 3 outputs normal alternating current, thereby providing a high-quality power supply for the electric equipment 6.
The Filter 7 in the present application may be, but is not limited to, an EMI (electromagnetic Interference Filter) or an RFI (Radio Frequency Interference Filter), and may be configured to Filter noise in the alternating current output by the mains power supply 1.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An uninterruptible power supply system, comprising:
a mains supply and an electric device;
the rectifier is connected with the mains supply and used for rectifying alternating current output by the mains supply into direct current;
the inverter is arranged between the rectifier and the electric equipment and used for inverting the direct current output by the rectifier or the direct current output by the storage battery pack into alternating current based on the parameters of the electric equipment so as to supply power to the electric equipment;
the storage battery pack is connected with the inverter and is used for outputting direct current when the commercial power supply and/or the rectifier have faults;
and the alternating current bypass power supply channel is arranged between the commercial power supply and the electric equipment and is used for supplying power to the electric equipment by using the alternating current output by the commercial power supply when the inverter fails.
2. The uninterruptible power supply system of claim 1, further comprising:
and the capacitor with the first end connected with the output end of the rectifier and the second end grounded is used for filtering the direct current output by the rectifier.
3. The uninterruptible power supply system of claim 1, further comprising:
the charger is used for converting alternating current output by the mains supply into direct current to charge the storage battery pack when the mains supply is not in fault.
4. The uninterruptible power supply system of claim 1, further comprising:
and the first conversion switch circuit is respectively connected with the storage battery pack, the rectifier and the inverter and used for conducting a circuit between the rectifier and the inverter when the mains supply and the rectifier are not in fault and conducting a circuit between the storage battery pack and the inverter when the mains supply and/or the rectifier are in fault.
5. The uninterruptible power supply system of claim 1, further comprising:
and the diode is used for isolating the direct-current power circuit between the storage battery pack and the rectifier and the inverter.
6. The uninterruptible power supply system of claim 1, further comprising:
and the second change-over switch circuit is respectively connected with the inverter, the alternating current bypass power supply channel and the electric equipment and is used for conducting a circuit between the inverter and the electric equipment when the inverter is not in fault and conducting a circuit between the alternating current bypass power supply channel and the electric equipment when the inverter is in fault.
7. The uninterruptible power supply system of claim 6, wherein the second transfer switch circuit comprises:
the first switch is connected with the inverter at a first end and connected with the electric equipment at a second end and is used for conducting when the inverter is not in fault;
and the second switch is used for conducting when the inverter fails.
8. The uninterruptible power supply system of claim 7, further comprising:
the monitoring circuit is connected with the inverter and is used for monitoring the output voltage of the inverter;
the control circuit is respectively connected with the monitoring circuit and the second change-over switch and is used for controlling the first switch to be closed and controlling the second switch to be opened when the inverter is monitored to be not in fault based on the output voltage of the inverter; and controlling the second switch to be closed and the first switch to be opened when the inverter fault is monitored based on the output voltage of the inverter.
9. The uninterruptible power supply system of claim 1, wherein the rectifier is a single phase bridge rectifier circuit.
10. The uninterruptible power supply system of any of claims 1 to 9, further comprising:
and the filter is used for filtering the alternating current output by the mains supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121654125.8U CN215120269U (en) | 2021-07-20 | 2021-07-20 | Uninterrupted power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121654125.8U CN215120269U (en) | 2021-07-20 | 2021-07-20 | Uninterrupted power supply system |
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| Publication Number | Publication Date |
|---|---|
| CN215120269U true CN215120269U (en) | 2021-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121654125.8U Expired - Fee Related CN215120269U (en) | 2021-07-20 | 2021-07-20 | Uninterrupted power supply system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115149631A (en) * | 2022-06-23 | 2022-10-04 | 四川蓝海化工（集团）有限公司 | Leak-proof oil-immersed UPS (uninterrupted Power supply) |
-
2021
- 2021-07-20 CN CN202121654125.8U patent/CN215120269U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115149631A (en) * | 2022-06-23 | 2022-10-04 | 四川蓝海化工（集团）有限公司 | Leak-proof oil-immersed UPS (uninterrupted Power supply) |
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