CN216649307U

CN216649307U - Intelligent power supply circuit

Info

Publication number: CN216649307U
Application number: CN202122923426.2U
Authority: CN
Inventors: 吴金权; 叶子红; 李竞舟
Original assignee: Dongguan Mentech Optical and Magnetic Co Ltd
Current assignee: Dongguan Mentech Optical and Magnetic Co Ltd
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2022-05-31
Anticipated expiration: 2031-11-25

Abstract

The utility model discloses an intelligent power supply circuit.A first UPS power supply has an input end connected with a main power supply, an output end connected with a first UPS output switch, and the first UPS output switch connected with a load; a coil of the first contactor is connected with the output end of the first UPS power supply, and the main power supply, the normally closed contact of the first contactor and the load are connected in series; a coil of the first relay is connected with the output end of the first UPS, and a power taking interface of the first shunt release, a normally closed contact of the first relay and a main power supply are connected in series; the first shunt release and the first electric operating mechanism are respectively connected with the first UPS output switch, and the electricity taking interface of the first electric operating mechanism is connected with the output end of the first UPS power supply. After the static bypass fault of the UPS, the contactor can be used for replacing a traditional maintenance bypass switch, automatic switching-on is realized, the load power failure is avoided, the reliability of a power supply system is improved, the concealment is better, and the misoperation of non-professional people can be effectively avoided.

Description

Intelligent power supply circuit

Technical Field

The utility model belongs to the technical field of uninterruptible power supplies, and particularly relates to an intelligent power supply circuit.

Background

An Uninterruptible Power Supply (UPS) is an Uninterruptible Power Supply including an energy storage device, and is mainly used to provide an uninterrupted Power Supply for some devices having a high requirement on Power stability. The existing UPS power supply maintenance bypass adopts a manual switching-on and switching-off mode, and when a UPS fails, the purpose of ensuring that a rear-end load is not powered off is achieved through an operation and maintenance or on-site switching-on UPS maintenance bypass switch by maintenance personnel. At present, UPS power maintenance switches are all micro-break, plastic shell and isolating switches. Under normal conditions, the maintenance switch is in a disconnected state, and under the condition of the fault of the static bypass of the UPS, the load can not be ensured to continue to operate. Static bypass is that when the UPS fails or the working condition is in problem, the system can automatically switch to the internal bypass, and the internal bypass can also be switched by manual operation. The mains supply is directly bypassed to the load through an internal static bypass, and the main hardware for realizing the static bypass is a thyristor or a module.

In the prior art, after the static bypass of the UPS itself fails, an operation and maintenance worker needs to go to the site to manually close the maintenance bypass switch to continue supplying power to the load, which causes the risk of power failure of the load during the period when the manual maintenance bypass is not closed. Because the UPS itself acts to keep the load from powering down, this can cause significant losses if it does occur.

SUMMERY OF THE UTILITY MODEL

The utility model provides an intelligent power supply circuit which can solve or at least partially solve the technical problems.

Therefore, the utility model adopts the following technical scheme:

in a first aspect, an intelligent power supply circuit is provided, which includes a first UPS power supply, a first UPS output switch, a first contactor, a first relay, a first shunt release, and a first electrically operated mechanism;

the input end of the first UPS power supply is connected with a main power supply, the output end of the first UPS power supply is connected with the first UPS output switch, and the first UPS output switch is connected with a load;

a coil of the first contactor is connected with the output end of the first UPS power supply, and the main power supply, the normally closed contact of the first contactor and the load are connected in series;

a coil of the first relay is connected with the output end of the first UPS, and a power taking interface of the first shunt release, a normally closed contact of the first relay and the main power supply are connected in series;

the first shunt release and the first electric operating mechanism are respectively connected with the first UPS output switch, and the electricity taking interface of the first electric operating mechanism is connected with the output end of the first UPS power supply.

Optionally, the coil of the first contactor, the coil of the first relay, and the output of the first UPS power source are connected in series.

Optionally, the main power supply is a mains supply, the first contactor is an ac contactor, and the first relay is an ac relay.

In a second aspect, an intelligent power supply circuit is provided, which comprises a second UPS power supply, a second UPS output switch, a second contactor, a first controller, a second shunt release and a second electric operating mechanism; the first controller comprises a first switch contact;

the input end of the second UPS power supply is connected with a main power supply, the output end of the second UPS power supply is connected with the second UPS output switch, and the second UPS output switch is connected with a load;

a coil of the second contactor is connected with the output end of the second UPS power supply, and the main power supply, the normally closed contact of the second contactor and the load are connected in series;

the power taking interface of the second shunt release, the first switch contact and the main power supply are connected in series;

the first controller is connected with the output end of the second UPS and is used for controlling the first switch contact to be disconnected when the output end of the second UPS is detected to be normal, and otherwise, controlling the first switch contact to be closed;

the second shunt release and the second electric operating mechanism are respectively connected with the second UPS output switch, and the electricity taking interface of the second electric operating mechanism is connected with the output end of the second UPS power supply.

Optionally, the first controller further includes a first voltage detection circuit or a first detection relay for detecting whether the output of the second UPS power supply is normal.

Optionally, the first controller further comprises a first latching contact, and the first latching contact, the coil of the second contactor and the output of the second UPS power supply are connected in series;

the first controller is further used for controlling the first self-locking contact to be closed when the output of the output end of the second UPS is detected to be normal, and otherwise, controlling the first self-locking contact to be disconnected.

Optionally, the main power supply is a commercial power supply, and the second contactor is an ac contactor.

In a third aspect, an intelligent power supply circuit is provided, which includes a third UPS power supply, a third contactor, and a fourth contactor;

the input end of the third UPS power supply is connected with a main power supply, and the output end of the third UPS power supply is connected with the coil of the third contactor; the output end of the third UPS power supply, a group of normally open contacts of the third contactor and a load are connected in series;

and the coil of the fourth contactor is connected with the output end of the third UPS power supply, and the main power supply, the normally closed contact of the fourth contactor and the load are connected in series.

Optionally, the output of the third UPS power source, the other set of normally open contacts of the third contactor, and the coil of the fourth contactor are connected in series.

Optionally, the main power supply is a commercial power supply, and the third contactor and the fourth contactor are both ac contactors.

In a fourth aspect, an intelligent power supply circuit is provided, which includes a fourth UPS power supply, a fifth contactor, a sixth contactor, and a second controller, where the second controller includes a second switch contact;

the input end of the fourth UPS is connected with a main power supply, and the output end of the fourth UPS is connected with the coil of the fifth contactor; the output end of the fourth UPS, a group of normally open contacts of the fifth contactor and a load are connected in series;

a coil of the sixth contactor is connected with the output end of the fourth UPS power supply, and the main power supply, the normally closed contact of the sixth contactor and the load are connected in series;

the second controller is connected with the output end of the fourth UPS and used for controlling the second switch contact to be closed when the output end of the fourth UPS is detected to be normal, otherwise, controlling the second switch contact to be disconnected.

Optionally, the second controller further includes a second voltage detection circuit or a second detection relay for detecting whether the output of the fourth UPS power supply is normal.

Optionally, the second controller further comprises a second latching contact, and the second latching contact, the coil of the sixth contactor and the output of the fourth UPS power supply are connected in series;

the second controller is further used for controlling the second self-locking contact to be closed when the output of the output end of the fourth UPS is detected to be normal, and otherwise, controlling the second self-locking contact to be disconnected.

Optionally, the fifth contactor and the sixth contactor are both ac contactors.

Compared with the prior art, the embodiment of the utility model has the following beneficial effects:

according to the intelligent power supply circuit provided by the embodiment of the utility model, after the UPS power supply has a static bypass fault, the contactor can be used for replacing the traditional maintenance bypass switch to realize automatic switching-on, the main power supply supplies power to the load through the contactor, the hidden trouble of load power failure is avoided, the reliability of a power supply system is improved, the contactor is used for replacing the traditional maintenance bypass switch, the concealment is better, and the misoperation of non-professionals can be effectively avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so that those skilled in the art can understand and read the present invention, and do not limit the conditions for implementing the present invention, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the functions and purposes of the present invention, should still fall within the scope covered by the contents disclosed in the present invention.

FIG. 1 is a block diagram of an intelligent power supply circuit according to one embodiment;

FIG. 2 is an electrical diagram illustrating a normal state of the UPS according to an embodiment;

FIG. 3 is an electrical diagram illustrating an abnormal status of a static bypass of a UPS according to an embodiment;

FIG. 4 is a block diagram of an intelligent power supply circuit according to the second embodiment;

FIG. 5 is an electrical diagram illustrating a normal state of the UPS according to the second embodiment;

FIG. 6 is an electrical diagram illustrating a static bypass abnormal state of the UPS according to the second embodiment;

fig. 7 is a block diagram of an intelligent power supply circuit according to the third embodiment;

FIG. 8 is an electrical diagram illustrating a normal state of the UPS according to the third embodiment;

FIG. 9 is an electrical diagram illustrating a static bypass abnormal state of the UPS according to the third embodiment;

FIG. 10 is a block diagram of an intelligent power supply circuit according to the fourth embodiment;

FIG. 11 is an electrical diagram illustrating a normal state of the UPS according to the fourth embodiment;

FIG. 12 is an electrical diagram illustrating an abnormal status of the static bypass of the UPS according to the fourth embodiment.

Illustration of the drawings:

10. a main power supply; 20. a load; 31. a first UPS power supply; 32. a first electric operating mechanism; 33. a first UPS output switch; 34. a first contactor; 35. a first relay; 36. a first shunt release; 41. a second UPS power supply; 42. a second electric operating mechanism; 43. a second UPS output switch; 44. a second contactor; 45. a first controller; 46. a second shunt release; 51. a third UPS power source; 52. A third contactor; 53. a fourth contactor; 61. a fourth UPS power supply; 62. a fifth contactor; 63. A second controller; 64. and a sixth contactor.

Detailed Description

In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in 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 apparent that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

Example one

Referring to fig. 1, the present embodiment provides an intelligent power supply circuit, which includes a first UPS power source 31, a first UPS output switch 33, a first contactor 34, a first relay 35, a first shunt release 36, and a first electrically operated mechanism 32. The input end of the first UPS power source 31 is connected to the main power source 10, the output end of the first UPS power source 31 is connected to the first UPS output switch 33, and the first UPS output switch 33 is connected to the load 20. The coil of the first contactor 34 is connected to the output terminal of the first UPS power source 31, and the total power source 10, the normally closed contact of the first contactor 34, and the load 20 are connected in series. The coil of the first relay 35 is connected to the output end of the first UPS power supply 31, and the power-taking interface of the first shunt release 36, the normally closed contact of the first relay 35, and the main power supply 10 are connected in series. The first shunt release 36 and the first electrically operated mechanism 32 are respectively connected to the first UPS output switch 33, and a power-taking interface of the first electrically operated mechanism 32 is connected to an output terminal of the first UPS power supply 31.

Therefore, when the first UPS power source 31 is normal, the output of the first UPS power source 31 is normal, for example, the voltage is normal, the first electrical operating mechanism 32 is powered on to close the first UPS output switch 33, power is supplied to the load 20 through the first UPS output switch 33, the coils of the first contactor 34 and the first relay 35 are powered on, and the normally closed contacts of the first contactor 34 and the first relay 35 are open. When the first UPS power supply 31 is abnormal and a bypass static fault occurs, the output of the output end of the first UPS power supply 31 is abnormal, if there is no voltage, the normally closed contacts of the first contactor 34 and the first relay 35 both recover to a closed state, the main power supply 10 supplies power to the load 20 through the first contactor 34, so as to prevent the load 20 from being powered down, and the first relay 35 enables the first shunt release 36 to work, so as to disconnect the first UPS output switch 33, thereby protecting the circuit.

Specifically, as an alternative implementation of the present embodiment, as shown in fig. 2 and 3. The mains supply 10 is mains electricity. The first contactor 34 is an ac contactor, and the first relay 35 is an ac relay. The coil of the first contactor 34, the coil of the first relay 35, and the output terminal of the first UPS power source 31 are connected in series.

Example two

Referring to fig. 4, the intelligent power supply circuit provided in this embodiment includes a second UPS power source 41, a second UPS output switch 43, a second contactor 44, a first controller 45, a second shunt release 46, and a second electrically operated mechanism 42; the first controller 45 includes a first switch contact. The input terminal of the second UPS power source 41 is connected to the main power source 10, the output terminal of the second UPS power source 41 is connected to the second UPS output switch 43, and the second UPS output switch 43 is connected to the load 20. The coil of the second contactor 44 is connected to the output terminal of the second UPS power source 41, and the total power source 10, the normally closed contact of the second contactor 44, and the load 20 are connected in series. The power take-off interface of the second shunt release 46, the first switch contact and the mains supply 10 are connected in series. The first controller 45 is connected to the output terminal of the second UPS power source 41, and is configured to control the first switch contact to be opened when detecting that the output terminal of the second UPS power source 41 is normal, and otherwise, control the first switch contact to be closed. The second shunt release 46 and the second electrically operated mechanism 42 are respectively connected to the second UPS output switch 43, and a power-taking interface of the second electrically operated mechanism 42 is connected to an output end of the second UPS power supply 41.

The intelligent power supply circuit provided by this embodiment can remotely monitor the state of the second UPS power supply 41 and can also remotely switch power supplies by replacing the first relay 35 with the first controller 45.

Specifically, when the output of the second UPS power supply 41 is normal, if the voltage is normal, the normally closed contact of the second contactor 44 is opened, and the first controller 45 controls the first switch contact to be opened, the second electric operating mechanism 42 is powered on, and the second UPS output switch 43 is closed, so that the main power supply 10 supplies power to the load 20 through the second UPS output switch 43. When the output of the second UPS power supply 41 is abnormal, for example, no voltage exists, and a static bypass fault occurs, the normally closed contact of the second contactor 44 is closed again, the main power supply 10 supplies power to the load 20 through the second contactor 44, so as to prevent the load 20 from being powered down, and meanwhile, the first controller 45 controls the first switch contact to be closed, so that the second shunt release 46 works to turn off the second UPS output switch 43, so as to protect the circuit.

As an alternative to this embodiment, as shown in fig. 5 and 6, the main power source 10 is the commercial power, and the second contactor 44 is an ac contactor.

Further, the first controller 45 further includes a first self-locking contact, and the first self-locking contact, a coil of the second contactor 44 and an output end of the second UPS power source 41 are connected in series; the first controller 45 is further configured to control the first self-locking contact to be closed when detecting that the output of the second UPS power supply 41 is normal, and otherwise, control the first self-locking contact to be opened.

Further, the first controller 45 further includes a first voltage detection circuit or a first detection relay for detecting whether the output of the second UPS power source 41 is normal. It should be understood that there may be a plurality of detection manners to detect whether the output of the second UPS power supply 41 is normal. For example, the first voltage detection circuit may be used to determine whether the voltage is normal by detecting the magnitude of the voltage; it is also possible to connect the coil of the first detection relay in series to the second UPS power source 41 through the first detection relay, and then the first controller 45 judges whether it is normal by acquiring the contact thereof.

EXAMPLE III

Referring to fig. 7, the present embodiment provides an intelligent power supply circuit, which includes a third UPS power source 51, a third contactor 52 and a fourth contactor 53. The input end of the third UPS power supply 51 is connected to the main power supply 10, and the output end of the third UPS power supply 51 is connected to the coil of the third contactor 52; an output of the third UPS power source 51, a set of normally open contacts of the third contactor 52, and the load 20 are connected in series. The coil of the fourth contactor 53 is connected to the output terminal of the third UPS power supply 51, and the total power supply 10, the normally closed contact of the fourth contactor 53, and the load 20 are connected in series.

Specifically, when the output of the third UPS power supply 51 is normal, such as normal voltage, the coil of the third contactor 52 is energized, one set of normally open contacts thereof is closed, and the power of the main power supply 10 is supplied to the load 20, and at this time, the coil of the fourth contactor 53 is also energized, and the normally closed contacts thereof are opened. When the output of the third UPS power supply 51 is abnormal, such as no voltage, and a static bypass fault occurs, one set of normally open contacts of the third contactor 52 is opened, but at the same time, the normally closed contacts of the fourth contactor 53 are closed again, so that the main power supply 10 supplies power to the load 20 through the fourth contactor 53 to prevent the load 20 from being powered down.

Referring to fig. 8 and 9, as an alternative embodiment of this embodiment, the main power source 10 is the commercial power, and the third contactor 52 and the fourth contactor 53 are ac contactors.

Further, the output end of the third UPS power supply 51, another set of normally open contacts of the third contactor 52 and the coil of the fourth contactor 53 are connected in series, so that self-locking and circuit protection can be realized.

Example four

Referring to fig. 10, the intelligent power supply circuit provided in this embodiment includes a fourth UPS power source 61, a fifth contactor 62, a sixth contactor 64, and a second controller 63, where the second controller 63 includes a second switch contact. The input end of the fourth UPS 61 is connected with the main power supply 10, and the output end of the fourth UPS 61 is connected with the coil of the fifth contactor 62; an output of the fourth UPS power source 61, a set of normally open contacts of the fifth contactor 62, and the load 20 are connected in series. The coil of the sixth contactor 64 is connected to the output terminal of the fourth UPS power source 61, and the total power source 10, the normally closed contacts of the sixth contactor 64, and the load 20 are connected in series. The second controller 63 is connected to the output terminal of the fourth UPS power supply 61, and is configured to control the second switch contact to be closed when detecting that the output terminal of the fourth UPS power supply 61 outputs normally, and otherwise, control the second switch contact to be open.

Therefore, when the output of the fourth UPS power source 61 is normal, if the voltage is normal, the coils of the fifth contactor 62 and the sixth contactor 64 are both energized, the total power source 10 supplies power to the load 20 through the fifth contactor 62, and the normally closed contact of the sixth contactor 64 is opened. When the output of the fourth UPS power source 61 is abnormal, such as no voltage, and a static bypass fault occurs, the coils of the fifth contactor 62 and the sixth contactor 64 are both de-energized, and the main power source 10 supplies power to the load 20 through the normally closed contact of the sixth contactor 64.

In the embodiment, by adding the second controller 63, the state of the fourth UPS power source 61 can be remotely monitored, and remote power switching can also be realized.

Referring to fig. 11 and 12, as an alternative embodiment of the present embodiment, the main power source 10 is commercial power, and the fifth contactor 62 and the sixth contactor 64 are ac contactors.

Further, the second controller 63 further includes a second self-locking contact, and the second self-locking contact, a coil of the sixth contactor 64 and an output end of the fourth UPS power source 61 are connected in series; the second controller 63 is further configured to control the second self-locking contact to be closed when detecting that the output of the fourth UPS power supply 61 is normal, and otherwise, control the second self-locking contact to be opened.

Further, the second controller 63 further includes a second voltage detection circuit or a second detection relay for detecting whether the output of the fourth UPS power supply 61 is normal.

It should be appreciated that in any of the above embodiments, the circuit state of the various embodiments is restored to the original state after the new UPS power source is replaced.

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; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. An intelligent power supply circuit is characterized by comprising a first UPS (uninterrupted power supply) power supply (31), a first UPS output switch (33), a first contactor (34), a first relay (35), a first shunt release (36) and a first electric operation mechanism (32);

the input end of the first UPS power supply (31) is connected with a main power supply (10), the output end of the first UPS power supply (31) is connected with the first UPS output switch (33), and the first UPS output switch (33) is connected with a load (20);

the coil of the first contactor (34) is connected with the output end of the first UPS power supply (31), and the main power supply (10), the normally closed contact of the first contactor (34) and the load (20) are connected in series;

a coil of the first relay (35) is connected with the output end of the first UPS (31), and a power-taking interface of the first shunt release (36), a normally closed contact of the first relay (35) and the main power supply (10) are connected in series;

the first shunt release (36) and the first electric operating mechanism (32) are respectively connected with the first UPS output switch (33), and the power taking interface of the first electric operating mechanism (32) is connected with the output end of the first UPS power supply (31).

2. The intelligent power supply circuit according to claim 1, wherein the coil of the first contactor (34), the coil of the first relay (35), and the output of the first UPS power source (31) are connected in series.

3. An intelligent power supply circuit, comprising a second UPS power supply (41), a second UPS output switch (43), a second contactor (44), a first controller (45), a second shunt release (46), and a second electrically operated mechanism (42), the first controller (45) comprising a first switch contact;

the input end of the second UPS power supply (41) is connected with a main power supply (10), the output end of the second UPS power supply (41) is connected with the second UPS output switch (43), and the second UPS output switch (43) is connected with a load (20);

a coil of the second contactor (44) is connected to an output of the second UPS power supply (41), and the main power supply (10), the normally closed contact of the second contactor (44) and the load (20) are connected in series;

the power-taking interface of the second shunt release (46), the first switch contact and the main power supply (10) are connected in series;

the first controller (45) is connected with the output end of the second UPS (41) and is used for controlling the first switch contact to be opened when the output end of the second UPS (41) is detected to be normal, otherwise, controlling the first switch contact to be closed;

the second shunt release (46) and the second electric operating mechanism (42) are respectively connected with the second UPS output switch (43), and the power taking interface of the second electric operating mechanism (42) is connected with the output end of the second UPS power supply (41).

4. The intelligent power supply circuit according to claim 3, wherein the first controller (45) further comprises a first voltage detection circuit or a first detection relay for detecting whether the output of the second UPS power supply (41) is normal.

5. The intelligent power supply circuit according to claim 3, wherein the first controller (45) further comprises a first latching contact, the first latching contact, a coil of the second contactor (44), and an output of the second UPS power supply (41) being connected in series;

the first controller (45) is further used for controlling the first self-locking contact to be closed when the output of the output end of the second UPS (41) is detected to be normal, and otherwise, controlling the first self-locking contact to be opened.

6. An intelligent power supply circuit, comprising a fourth UPS power supply (61), a fifth contactor (62), a sixth contactor (64) and a second controller (63), the second controller (63) comprising a second switch contact;

the input end of the fourth UPS (61) is connected with a main power supply (10), and the output end of the fourth UPS (61) is connected with the coil of the fifth contactor (62); an output of the fourth UPS (61), a set of normally open contacts of the fifth contactor (62), and a load (20) are connected in series;

a coil of the sixth contactor (64) is connected to an output terminal of the fourth UPS power source (61), and the main power source (10), the normally closed contact of the sixth contactor (64) and the load (20) are connected in series;

and the second controller (63) is connected with the output end of the fourth UPS power supply (61) and used for controlling the second switch contact to be closed when the output end of the fourth UPS power supply (61) is detected to be normal, otherwise, controlling the second switch contact to be disconnected.

7. The intelligent power supply circuit according to claim 6, wherein the second controller (63) further comprises a second voltage detection circuit or a second detection relay for detecting whether the output of the fourth UPS power source (61) is normal.

8. The intelligent power supply circuit according to claim 6, wherein the second controller (63) further comprises a second latching contact, the coil of the sixth contactor (64), and the output of the fourth UPS power source (61) being connected in series;

the second controller (63) is further configured to control the second self-locking contact to be closed when detecting that the output of the output terminal of the fourth UPS power supply (61) is normal, and otherwise, control the second self-locking contact to be opened.