Data center CDU controller redundancy switching circuit
By designing a redundant switching circuit for the data center CDU controller and using intermediate relays to achieve automatic controller switching, the problem of high cost of redundant controllers is solved, and downtime and maintenance costs are reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN CRUN CO LTD
- Filing Date
- 2025-03-31
- Publication Date
- 2026-05-26
AI Technical Summary
The existing redundant controllers of data center CDU controllers are costly, while ordinary controllers do not have redundancy functions, which leads to system stability and downtime issues.
A redundant switching circuit for a data center CDU controller was designed. The first and second controllers are connected through first and second circuits respectively, and an intermediate relay is used to realize the automatic switching of the controllers, ensuring that the system switches to the backup controller in the event of a failure.
It achieves low-cost multi-controller redundancy switching, reducing downtime due to failures and operation and maintenance costs.
Smart Images
Figure CN224289369U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of control circuit technology, and in particular relates to a redundancy switching circuit for a data center CDU controller. Background Technology
[0002] With the development of information technologies such as artificial intelligence, data centers, as their carriers, have become indispensable infrastructure. Data center cooling units (CDUs) play a crucial role in data center cooling, and the control system, as the core component of CDU operation, necessitates improving the stability of the CDU control system and reducing downtime due to failures. This stability can be improved through redundant controllers. However, currently, controllers with redundancy functions generally suffer from high costs and lack price advantages; while ordinary controllers do not possess basic redundancy capabilities.
[0003] Therefore, designing a redundancy switching circuit suitable for data center CDU controllers is a problem that urgently needs to be solved. Utility Model Content
[0004] The purpose of this utility model is to overcome the problems of the prior art by disclosing a data center CDU controller redundancy switching circuit, which realizes the redundancy switching function of multiple controllers through the circuit setting of this application.
[0005] The objective of this utility model is achieved through the following technical solution:
[0006] A data center CDU controller redundancy switching circuit, the data center CDU controller redundancy switching circuit includes a first circuit and a second circuit;
[0007] The first circuit includes: a first external power supply, a first switching power supply, a first controller, a control terminal of a first intermediate relay, and an execution terminal of a second intermediate relay. The first external power supply is connected to the first controller via the first switching power supply, and the execution terminal of the second intermediate relay is located between the first switching power supply and the first controller. The control terminal of the first intermediate relay is connected to the first controller.
[0008] The second circuit includes: a second external power supply, a second switching power supply, a second controller, a control terminal of a second intermediate relay, and an execution terminal of a first intermediate relay. The second external power supply is connected to the second controller via the second switching power supply, and the execution terminal of the first intermediate relay is located between the second switching power supply and the second controller. The control terminal of the second intermediate relay is connected to the second controller.
[0009] When the control terminal of the first intermediate relay receives a fault trigger signal from the first controller, it is configured to control the actuator of the first intermediate relay to power on and run the second controller.
[0010] Alternatively, when the control terminal of the second intermediate relay receives a fault trigger signal from the second controller, it is configured to control the actuator of the second intermediate relay to power on and run the first controller.
[0011] According to a preferred embodiment, the first circuit is further provided with a first protection element, which is disposed between the first switching power supply and the first controller. The input terminal of the first protection element is connected to the output terminal of the first switching power supply, and the output terminal of the first protection element is connected to the power supply terminal of the first controller.
[0012] The second circuit is also equipped with a second protection element, which is located between the second switching power supply and the second controller. The input terminal of the second protection element is connected to the output terminal of the second switching power supply, and the output terminal of the second protection element is connected to the power supply terminal of the second controller.
[0013] According to a preferred embodiment, the first protection element and the second protection element include a fuse and a circuit breaker.
[0014] According to a preferred embodiment, the external interfaces of the first controller and the second controller include a power supply terminal, a digital input terminal, a digital output terminal, and a common terminal.
[0015] According to a preferred embodiment, the power supply terminal includes a positive terminal, a negative terminal, and a protective ground.
[0016] The positive terminal of the power supply terminal of the first controller is connected to the common terminal of the digital input of the first controller and the positive terminal of the control terminal of the first intermediate relay; the negative terminal of the power supply terminal of the first controller is connected to the normally open contact 9 of the common terminal of the digital output of the first controller and the execution terminal of the second intermediate relay.
[0017] The positive terminal of the power supply terminal of the second controller is connected to the common terminal of the digital input of the second controller and the positive terminal of the control terminal of the second intermediate relay; the negative terminal of the power supply terminal of the second controller is connected to the common terminal of the digital output of the second controller and the normally open contact 9 of the execution terminal of the first intermediate relay.
[0018] According to a preferred embodiment, the digital input terminal I0.0 of the first controller is connected to the normally open contact 5 of the execution terminal of the second intermediate relay, and the digital input terminal I0.1 of the first controller is connected to the digital output terminal Q0.1 of the second controller.
[0019] The digital input terminal I0.0 of the second controller is connected to the normally open contact 5 of the execution terminal of the first intermediate relay, and the digital input terminal I0.1 of the second controller is connected to the digital output terminal Q0.1 of the first controller.
[0020] According to a preferred embodiment, the digital output terminal Q0.0 of the first controller is connected to the negative terminal of the control terminal of the first intermediate relay, and the digital output terminal Q0.0 of the second controller is connected to the negative terminal of the control terminal of the second intermediate relay.
[0021] According to a preferred embodiment, the first intermediate relay and the second intermediate relay each include a coil and a normally open contact, wherein the coil constitutes a control terminal and the normally open contact constitutes an execution terminal.
[0022] According to a preferred embodiment, the first external power supply and the second external power supply include single-phase AC220V, single-phase AC380V, dual-phase AC220V, dual-phase AC380V, single-phase DC24V, and dual-phase DC24V.
[0023] According to a preferred embodiment, the first switching power supply and the second switching power supply are used to convert the external power supply into the rated power supply required by the controller.
[0024] The aforementioned main solution of this utility model and its various further alternative solutions can be freely combined to form multiple solutions, all of which are solutions that can be adopted by this utility model and for which protection is sought. Those skilled in the art, after understanding the solution of this utility model, will realize, based on existing technology and common knowledge, that there are many combinations, all of which are technical solutions to be protected by this utility model; therefore, they are not exhaustively listed here.
[0025] The beneficial effects of this utility model are:
[0026] The redundant switching circuit for the data center CDU controller in this application reduces the cost of redundant control systems and has the function of redundant switching of multiple controllers, effectively reducing product downtime and operation and maintenance costs. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of the redundancy switching circuit of the data center CDU controller of this utility model. Detailed Implementation
[0028] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.
[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0031] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0032] Furthermore, it should be noted that unless otherwise specified, the specific structures, connections, positions, power sources, etc. involved in this utility model are all things that a person skilled in the art can know without creative effort based on the prior art.
[0033] refer to Figure 1 As shown in the figure, a data center CDU controller redundancy switching circuit is illustrated, including a first circuit and a second circuit.
[0034] The first circuit includes: a first external power supply, a first switching power supply, a first controller, a control terminal of a first intermediate relay, and an execution terminal of a second intermediate relay. The first external power supply is connected to the first controller via the first switching power supply, and the execution terminal of the second intermediate relay is located between the first switching power supply and the first controller. The control terminal of the first intermediate relay is connected to the first controller.
[0035] The second circuit includes: a second external power supply, a second switching power supply, a second controller, a control terminal of a second intermediate relay, and an execution terminal of a first intermediate relay. The second external power supply is connected to the second controller via the second switching power supply, and the execution terminal of the first intermediate relay is located between the second switching power supply and the second controller. The control terminal of the second intermediate relay is connected to the second controller.
[0036] When the control terminal of the first intermediate relay receives a fault trigger signal from the first controller, it is configured to control the actuator of the first intermediate relay to power on and run the second controller; or, when the control terminal of the second intermediate relay receives a fault trigger signal from the second controller, it is configured to control the actuator of the second intermediate relay to power on and run the first controller.
[0037] Specifically, the first external power supply provides external power to the first controller (CPU1) circuit. The L1 terminal of the first external power supply is connected to the input terminal L of the first switching power supply (P1), and the N1 terminal of the first external power supply is connected to the input terminal N of the first switching power supply (P1). The second external power supply provides external power to the second controller (CPU2) circuit. The L2 terminal of the second external power supply is connected to the input terminal L of the second switching power supply (P2), and the N2 terminal of the second external power supply is connected to the input terminal N of the second switching power supply (P2).
[0038] The first switching power supply (P1) converts the external power supply into the rated power supply required by the first controller (CPU1). The + output terminal of the first switching power supply (P1) is connected to pin 1 of the first protection element (FU1), and the - output terminal of the first switching power supply (P1) is connected to pin 3 of the first protection element (FU1). The second switching power supply (P2) converts the external power supply into the rated power supply required by the second controller (CPU2). The + output terminal of the second switching power supply (P2) is connected to pin 1 of the second protection element (FU2), and the - output terminal of the second switching power supply (P2) is connected to pin 3 of the second protection element (FU2).
[0039] The first protection element (FU1) protects the corresponding circuit of the first controller (CPU1). Its pin 2 is connected to the positive terminal +24V of the power supply of the first controller (CPU1), the common terminal COM of the digital input, and the coil 13 of the first intermediate relay (KA1). The pin 4 of the first protection element (FU1) is connected to the negative terminal 0V of the power supply of the first controller (CPU1), the common terminal COM of the digital output, and the normally open contact 9 of the second intermediate relay (KA2).
[0040] The second protection element (FU2) protects the corresponding circuit of the second controller (CPU2). Its pin 2 is connected to the positive terminal +24V of the power supply of the second controller (CPU2), the common terminal COM of the digital input, and the coil 13 of the second intermediate relay (KA2). Pin 4 of the second protection element (FU2) is connected to the negative terminal 0V of the power supply of the second controller (CPU2), the common terminal COM of the digital output, and the normally open contact 9 of the first intermediate relay (KA1).
[0041] The digital input terminal I0.0 of the first controller (CPU1) is connected to the normally open contact 5 of the second intermediate relay (KA2), and the digital input terminal I0.1 of the first controller (CPU1) is connected to the digital output terminal Q0.1 of the second controller (CPU2). The digital output terminal Q0.0 of the first controller (CPU1) is connected to the coil 14 of the first intermediate relay (KA1), and the digital output terminal Q0.1 of the first controller (CPU1) is connected to the digital input terminal I0.1 of the second controller (CPU2).
[0042] The digital input terminal I0.0 of the second controller (CPU2) is connected to the normally open contact 5 of the first intermediate relay (KA1), and the digital input terminal I0.1 of the second controller (CPU2) is connected to the digital output terminal Q0.1 of the first controller (CPU1); the digital output terminal Q0.0 of the second controller (CPU2) is connected to the coil 14 of the second intermediate relay (KA2), and the digital output terminal Q0.1 of the second controller (CPU2) is connected to the digital input terminal I0.1 of the first controller (CPU1).
[0043] For example, during circuit startup, the first external power supply, a single-phase AC 220V, is connected. The first switching power supply (P1) converts the external power supply to DC 24V to power the first controller (CPU1) circuit, and the first controller (CPU1) is put into operation. At this time, the digital output terminal Q0.1 of the first controller (CPU1) automatically outputs the first controller (CPU1) operation signal, which is fed back to the digital input terminal I0.1 of the second controller (CPU2). Then, the second external power supply, a single-phase AC 220V, is connected. The second switching power supply (P2) converts the external power supply to DC 24V to power the second controller (CPU2) circuit. At this time, the digital input terminal I0.1 of the second controller (CPU2) receives the operation feedback signal from the digital output terminal Q0.1 of the first controller (CPU1). The second controller (CPU2) is not put into operation, and the digital output terminal Q0.1 of the second controller (CPU2) does not output the operation feedback signal. The second controller (CPU2) serves as a redundant backup.
[0044] At this time, the first controller (CPU1) outputs a fault status signal at its digital output terminal Q0.0, meaning that the first controller (CPU1)'s digital output terminal Q0.0 is connected to the common digital output terminal. This connects the negative terminal 14 of the first intermediate relay (KA1) coil to the common digital output terminal of the first controller (CPU1), energizing the first intermediate relay (KA1) coil and closing its normally open contact. This connects the second controller (CPU2)'s digital input terminal I0.0 to the negative terminal of the second switching power supply (P2), and the second controller (CPU2) receives a high-level fault status signal from the first controller (CPU1). The second controller (CPU2) outputs a fault status signal at its digital output terminal Q0.0, meaning that the second controller (CPU2) digital output terminal Q0.0 is connected to the common terminal of the CPU2 digital output. This connects the negative terminal 14 of the second intermediate relay (KA2) coil to the common terminal of the second controller (CPU2) digital output, energizing the second intermediate relay (KA2) coil and closing its normally open contact. This connects the first controller (CPU1) digital input terminal I0.0 to the negative terminal of the first switching power supply (P1), and the first controller (CPU1) receives a high-level fault status signal from the second controller (CPU2).
[0045] When the first external power supply fails or the first controller (CPU1) malfunctions, the digital output terminal Q0.0 of the first controller (CPU1) stops outputting a signal. Consequently, the coil of the first intermediate relay (KA1) is de-energized, and the normally open contact of the first intermediate relay (KA1) opens. This disconnects the digital input terminal I0.0 of the second controller (CPU2) from the negative terminal of the second switching power supply (P2), and the second controller (CPU2) receives a low-level fault status signal from the first controller (CPU1). At this time, the second controller (CPU2) automatically switches to the active state, completing the redundancy switch from the first controller (CPU1) to the second controller (CPU2), ensuring normal system operation.
[0046] Similarly, when the second external power supply is switched on first, the second controller (CPU2) is activated, and the first controller (CPU1) serves as a redundant backup. When the second external power supply fails or the second controller (CPU2) malfunctions, the digital output terminal Q0.0 of the second controller (CPU2) stops outputting a signal. The coil of the second intermediate relay (KA2) then de-energizes, and the normally open contact of the second intermediate relay (KA2) opens. This disconnects the digital input terminal I0.0 of the first controller (CPU1) from the negative terminal of the first switching power supply (P1), and the first controller (CPU1) receives a low-level fault status signal from the second controller (CPU2). At this time, the first controller (CPU1) automatically switches to the active state, completing the redundancy switch from the second controller (CPU2) to the first controller (CPU1), ensuring normal system operation.
[0047] By setting up the connection structure of the redundant switching circuit of the data center CDU controller in this application, the cost of the redundant control system is reduced, and the redundant switching function of multiple controllers is provided, which effectively reduces the downtime and maintenance cost of the product.
[0048] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A redundancy switching circuit for a data center CDU controller, characterized in that, The data center CDU controller redundancy switching circuit includes a first circuit and a second circuit; The first circuit includes: a first external power supply, a first switching power supply, a first controller, a control terminal of a first intermediate relay, and an execution terminal of a second intermediate relay. The first external power supply is connected to the first controller via the first switching power supply, and the execution terminal of the second intermediate relay is located between the first switching power supply and the first controller. The control terminal of the first intermediate relay is connected to the first controller. The second circuit includes: a second external power supply, a second switching power supply, a second controller, a control terminal of a second intermediate relay, and an execution terminal of a first intermediate relay. The second external power supply is connected to the second controller via the second switching power supply, and the execution terminal of the first intermediate relay is located between the second switching power supply and the second controller. The control terminal of the second intermediate relay is connected to the second controller. When the control terminal of the first intermediate relay receives a fault trigger signal from the first controller, it is configured to control the actuator of the first intermediate relay to power on and run the second controller. Alternatively, when the control terminal of the second intermediate relay receives a fault trigger signal from the second controller, it is configured to control the actuator of the second intermediate relay to power on and run the first controller.
2. The data center CDU controller redundancy switching circuit as described in claim 1, characterized in that, The first circuit is also provided with a first protection element, which is located between the first switching power supply and the first controller. The input terminal of the first protection element is connected to the output terminal of the first switching power supply, and the output terminal of the first protection element is connected to the power supply terminal of the first controller. The second circuit is also equipped with a second protection element, which is located between the second switching power supply and the second controller. The input terminal of the second protection element is connected to the output terminal of the second switching power supply, and the output terminal of the second protection element is connected to the power supply terminal of the second controller.
3. The data center CDU controller redundancy switching circuit as described in claim 2, characterized in that, The first and second protective elements include: a fuse and a circuit breaker.
4. The data center CDU controller redundancy switching circuit as described in claim 1, characterized in that, The external interfaces of the first controller and the second controller include power supply terminals, digital input terminals, digital output terminals, and a common terminal.
5. The data center CDU controller redundancy switching circuit as described in claim 4, characterized in that, The power supply terminals include a positive terminal, a negative terminal, and a protective ground. The positive terminal of the power supply terminal of the first controller is connected to the common terminal of the digital input of the first controller and the positive terminal of the control terminal of the first intermediate relay; the negative terminal of the power supply terminal of the first controller is connected to the normally open contact 9 of the common terminal of the digital output of the first controller and the execution terminal of the second intermediate relay. The positive terminal of the power supply terminal of the second controller is connected to the common terminal of the digital input of the second controller and the positive terminal of the control terminal of the second intermediate relay; the negative terminal of the power supply terminal of the second controller is connected to the common terminal of the digital output of the second controller and the normally open contact 9 of the execution terminal of the first intermediate relay.
6. The data center CDU controller redundancy switching circuit as described in claim 5, characterized in that, The digital input terminal I0.0 of the first controller is connected to the normally open contact 5 of the execution terminal of the second intermediate relay, and the digital input terminal I0.1 of the first controller is connected to the digital output terminal Q0.1 of the second controller. The digital input terminal I0.0 of the second controller is connected to the normally open contact 5 of the execution terminal of the first intermediate relay, and the digital input terminal I0.1 of the second controller is connected to the digital output terminal Q0.1 of the first controller.
7. The data center CDU controller redundancy switching circuit as described in claim 6, characterized in that, The digital output terminal Q0.0 of the first controller is connected to the negative terminal of the control terminal of the first intermediate relay, and the digital output terminal Q0.0 of the second controller is connected to the negative terminal of the control terminal of the second intermediate relay.
8. The data center CDU controller redundancy switching circuit as described in claim 1, characterized in that, The first intermediate relay and the second intermediate relay each include a coil and a normally open contact, wherein the coil constitutes the control terminal and the normally open contact constitutes the execution terminal.
9. The data center CDU controller redundancy switching circuit as described in claim 1, characterized in that, The first external power supply and the second external power supply include single-phase AC 220V, single-phase AC 380V, dual-phase AC 220V, dual-phase AC 380V, single-phase DC 24V, and dual-phase DC 24V.
10. The data center CDU controller redundancy switching circuit as described in claim 1, characterized in that, The first and second switching power supplies are used to convert the external power supply into the rated power supply required by the controller.