Synchronization method for multiple power supplies in parallel, control power supply, electric control device and purifier

Abstract

The present invention discloses a synchronization method for multiple power supplies in parallel, a control power supply, an electric control device and a purifier. When multiple control power supplies are started simultaneously, the working state of each control power supply is first adjusted to a first operating state and the state is maintained unchanged until all control power supplies are in the first operating state, and then the first operating state is synchronously adjusted to a second operating state to achieve synchronous starting of each control power supply. Through the above method, by utilizing synchronous control of signals, multiple power supplies are synchronously started when multiple power supplies are connected in parallel, the difference in starting time of each power supply is eliminated, and malfunction of power supply protection is avoided.

Description

Technical Field

[0001] The present invention relates to the field of power supply control, and in particular to a synchronization method for connecting multiple power supplies in parallel, a control power supply, an electric control device and a purifier. Background Art

[0002] In the application of equipment power supply, it is often necessary to connect multiple power supplies in parallel to control the startup or shutdown of multiple power supplies at the same time, and realize the switch control of multiple power supplies or equipment. When multiple power supplies are running in parallel, at startup, due to the difference in startup time between the power supplies, the power supply that is started later may not be able to output current during startup due to the external voltage of the power supply that was started earlier, causing the power supply protection to malfunction.

[0003] It can be seen that the existing technology still needs to be improved and enhanced. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a synchronization method for multiple power supplies in parallel, a control power supply, an electronic control device and a purifier, aiming to achieve the synchronous start-up of multiple control power supplies, avoid causing the control power supply to trigger the protection malfunction, and solve the problem of synchronous start-up of multiple electric fields of the purifier.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A synchronization method for multiple power supplies in parallel, when the control power supply is started, comprises the following steps: the control power supply inputs a high-level signal to a bus, the bus follows the first control power supply outputting the high-level signal to be set to a high level, and the bus outputs a feedback signal to each control power supply; when the control power supply receives the feedback signal, the control power supply runs to a preset first running state and remains unchanged, and the high-level signal output to the bus is converted to a low-level signal; when all the control power supplies run to the first running state, the bus follows the last control power supply outputting the low-level signal to be set to a low level, and the bus outputs a feedback signal to each control power supply; when the control power supply receives the feedback signal, the control power supply is converted from the first running state to a preset second running state and remains unchanged.

[0007] The synchronization method for multiple power supplies in parallel, wherein, when any control power supply in the second operating state detects a spark flashover, the control power supply converts the low-level signal output to the bus into a high-level signal, the bus follows the control power supply and is set to a high level, and the bus outputs a feedback signal to each control power supply; the control power supply in the second operating state executes an arc extinguishing processing procedure, and restarts when the control power supply in the second operating state completes the arc extinguishing processing procedure.

[0008] The synchronization method for multiple power supplies in parallel, wherein, when a new control power supply is started when a control power supply is in the second operating state, the new control power supply inputs a high-level signal to the bus, the bus follows the new control power supply and is set to a high level, and the bus outputs a feedback signal to each control power supply; the control power supply in the second operating state executes an arc extinguishing processing procedure, and restarts after the control power supply in the second operating state completes the arc extinguishing processing procedure.

[0009] The synchronization method for multiple power supplies in parallel, wherein the second operating state is set to an operating state of outputting a working current; and the first operating state is set to a low current output state lower than the working current.

[0010] In the synchronization method for multiple power supplies in parallel, the level of the feedback signal is inverted and is opposite to the level of the bus.

[0011] In the synchronization method for multiple power supplies in parallel, the level of the feedback signal is the same as the level of the bus.

[0012] An electronic control device, characterized in that it includes several control power supplies and a bus, wherein the level input end and the level output end of the control power supply are both connected to the bus communication through a synchronization terminal, and the several control power supplies are connected in parallel; the electronic control device executes the synchronization method of multiple power supplies in parallel as described above.

[0013] In the electric control device, the level input terminal and the level output terminal of the control power supply are connected to the synchronization terminal through an isolation circuit; the isolation circuit is provided with a photoelectric coupler or a repeater or a magnetic isolation chip.

[0014] A control power supply comprises a control unit, wherein the control unit executes the synchronization method for connecting multiple power supplies in parallel as described above.

[0015] A purifier, characterized in that it comprises an electric field component and a plurality of control power supplies, wherein the electric field component is respectively control-connected to the plurality of control power supplies; the purifier executes the synchronization method of multiple power supplies in parallel as described above.

[0016] Beneficial effects:

[0017] The present invention provides a synchronization method for multiple power supplies in parallel, a control power supply, an electronic control device and a purifier. Compared with the prior art, multiple control power supplies are connected in parallel communication through a bus. After the control power supplies are started, the multiple control power supplies are synchronized to run in a second operating state to work normally after the multiple control power supplies are all in a first operating state. The signal synchronization principle is utilized to achieve synchronous start-up of multiple control power supplies in parallel, eliminate the difference in start-up time of each control power supply, and avoid false operation of power supply protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the level logic of a synchronization method for multiple power supplies in parallel according to the present invention Figure 1 .

[0019] Figure 2 A schematic diagram of the level logic of a synchronization method for multiple power supplies in parallel according to the present invention Figure 2 .

[0020] Figure 3 A schematic diagram of the level logic of a synchronization method for multiple power supplies in parallel according to the present invention Figure 3 .

[0021] Figure 4 The present invention is a block diagram of an electric control device.

[0022] Figure 5 The present invention is a circuit diagram of an embodiment of an electric control device.

[0023] Figure 6 This is a connection block diagram of a purifier described in the present invention.

[0024] Description of main component symbols: 100-bus, 110-synchronization terminal, 200-control power supply, 210-level input terminal, 220-level output terminal, 300-isolation circuit, 400-electric field component. DETAILED DESCRIPTION

[0025] The present invention provides a synchronization method for multiple power supplies in parallel, a control power supply, an electric control device and a purifier. In order to make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the scope of protection of the present invention.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] See also Figure 1The present invention provides a synchronization method for multiple power supplies in parallel. When the control power supply 200 is started, the method includes the following steps: the control power supply 200 inputs a high-level signal to the bus 100, the bus 100 follows the first control power supply 200 outputting the high-level signal to set to a high level, and the bus 100 outputs a feedback signal to each control power supply 200; when the control power supply 200 receives the feedback signal, the control power supply 200 runs to a preset first operating state and remains unchanged, and the high-level signal output to the bus 100 is converted to a low-level signal; when the control power supplies 200 all run to the first operating state, the bus 100 follows the last control power supply 200 outputting the low-level signal to set to a low level, and the bus 100 outputs a feedback signal to each control power supply 200; when the control power supply 200 receives the feedback signal, the control power supply 200 is converted from the first operating state to the preset second operating state and remains unchanged. In addition, when the control power supplies 200 are all shut down, the bus 100 is in a low-level state.

[0028] As a preference, the second operating state is set to an operating state of outputting a working current; and the first operating state is set to a low current output state lower than the working current.

[0029] Through the above-mentioned synchronization method, after multiple control power supplies 200 are started, the current output of each control power supply 200 is first adjusted to the first operating state and maintained unchanged. At this time, the control power supply 200 is not in the state of outputting working current, and the current is relatively low, which will not cause malfunction of the power supply protection; until all control power supplies 200 are in the first operating state, the first operating state is synchronously adjusted to the second operating state, the working current is output, and the normal working state is maintained; thereby eliminating the time difference existing when each control power supply 200 is started, realizing the synchronous startup of multiple control power supplies 200, and effectively avoiding malfunction of the power supply protection.

[0030] See also Figure 2 In actual applications, the control power supply 200 is usually provided with an arc extinguishing processing program for arc extinguishing. However, when multiple power supplies are operated in parallel, if a spark flashover occurs, it is possible that only some of the power supplies detect it, while the power supplies that do not detect the spark flashover continue to work normally, which will cause arc extinguishing failure and easily cause safety accidents.

[0031] Further, in some embodiments, when any control power supply 200 in the second operating state detects a spark flashover, the control power supply 200 converts the low-level signal output to the bus 100 into a high-level signal, and the bus 100 follows the control power supply 200 to set to a high level, and the bus 100 outputs a feedback signal to each control power supply 200; the control power supply 200 in the second operating state executes the arc extinguishing processing program, and the control power supply 200 in the second operating state restarts after completing the arc extinguishing processing program, and returns to the multi-power startup step of the above-mentioned synchronization method. Through the above method, the synchronization signal control is further utilized to force the power supply that has not detected the spark flashover to enter the arc extinguishing processing program, thereby preventing the arc extinguishing failure caused by the asynchronous arc extinguishing processing of the control power supply 200, and ensuring the reliability and rapidity of arc extinguishing.

[0032] See also Figure 3 In actual applications, when a new power supply needs to be started while there are power supplies running in parallel, the new power supply may not be able to start normally due to the high voltage already present outside.

[0033] Further, in some embodiments, when a new control power supply is started when there is a control power supply 200 in the second operating state, the new control power supply inputs a high level signal to the bus 100, the bus 100 follows the new control power supply and is set to a high level, and the bus 100 outputs a feedback signal to each control power supply 200; the control power supply 200 in the second operating state executes the arc extinguishing processing program, and the control power supply 200 in the second operating state restarts after completing the arc extinguishing processing program. Through the above method, the power supplies in the parallel operating state are restarted by using the synchronization signal control and the arc extinguishing processing program built into the power supply itself, thereby realizing the synchronous startup of these power supplies and the newly started power supply, and ensuring the normal startup of the new power supply.

[0034] Specifically, see Figure 1-3 In this embodiment, the level of the feedback signal is inverted and is opposite to the level of the bus 100.

[0035] Further, in another embodiment, the level of the feedback signal can be set to be the same as the level of the bus 100. Therefore, whether the level of the feedback signal is set to a high level or a low level does not affect the logic execution of the above synchronization method, and the level of the feedback signal can be set according to actual needs.

[0036] As a preference, the bus 100 is preferably a SYN bus 100 .

[0037] See also Figure 4-5The present invention also provides an electronic control device, including a plurality of control power supplies 200 and a bus 100, wherein the level input terminal 210 and the level output terminal 220 of the control power supply 200 are both communicatively connected to the bus 100 through a synchronization terminal 110, and the plurality of control power supplies 200 are connected in parallel; the electronic control device executes the synchronization method of multiple power supplies in parallel as described above; it should be noted that the plurality of control power supplies 200 share a common ground.

[0038] Furthermore, in some embodiments, the level input terminal 210 and the level output terminal 220 of the control power supply 200 are connected to the synchronization terminal 110 through the isolation circuit 300; the isolation circuit 300 is provided with a photoelectric coupler or a repeater or a magnetic isolation chip; wherein the magnetic isolation chip is preferably an ADI brand magnetic isolation chip. Through the above configuration, the control power supplies 200 are isolated, which can effectively reduce electromagnetic interference and play a role in protecting the circuit.

[0039] Specifically, in this embodiment, please refer to Figure 4 , the isolation circuit 300 adopts a photoelectric isolation form, which includes a photocoupler U1 and a photocoupler U2, the level input terminal 210 is connected to one end of the light emitter of the photocoupler U1 through a resistor R1, and the other end of the photocoupler U1 is grounded; one end of the light receiver of the photocoupler U1 is connected to the current voltage 12V through a resistor R2, and the other end of the light receiver of the photocoupler U1 is connected to the bus 100 through a synchronization terminal 110. One end of the light emitter of the photocoupler U2 is connected to the above-mentioned synchronization terminal 110 through a resistor R4, and the other end of the light emitter of the photocoupler U2 is grounded through a resistor R5; one end of the light receiver of the photocoupler U2 is connected to the level output terminal 220, and the other end of the light receiver of the photocoupler U2 is grounded. Through the above settings, photoelectric isolation between each control power supply 200 is achieved.

[0040] As a preferred embodiment, the level output terminal 220 is further connected to the DC voltage 3.3V via the pull-up resistor R6, so that the level output terminal 220 is pulled up to achieve inversion processing of the feedback signal.

[0041] The present invention further provides a control power supply 200, comprising a control unit, which executes the synchronization method of multiple power supplies in parallel as described above; since the synchronization method of multiple power supplies in parallel is described in detail above, it will not be repeated here.

[0042] See also Figure 6The present invention also provides a purifier, including an electric field component 400 and a plurality of control power supplies 200, wherein the electric field component 400 is respectively controlled and connected to the plurality of control power supplies 200, and the plurality of control power supplies 200 are connected in parallel via a bus 100, and the purifier executes the synchronization method of multiple power supplies in parallel as described above; the synchronization method is used to solve the problem of synchronous start-up control of multiple electric field units in the electric field component 400, thereby improving the reliability of the purifier and thus improving the product quality; since the synchronization method of multiple power supplies in parallel is described in detail above, it will not be repeated here.

[0043] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention, and all these changes or substitutions should fall within the protection scope of the present invention.

Claims

1. A synchronization method for multiple power supplies in parallel, characterized in that: When the control power supply is started, the following steps are included: the control power supply inputs a high-level signal to the bus, the bus follows the first control power supply that outputs a high-level signal and is set to a high level, and the bus outputs a feedback signal to each control power supply; when the control power supply receives the feedback signal, the control power supply runs to a preset first operating state and remains unchanged, and the high-level signal output to the bus is converted to a low-level signal; when all the control power supplies run to the first operating state, the bus follows the last control power supply that outputs a low-level signal and is set to a low level, and the bus outputs a feedback signal to each control power supply; when the control power supply receives the feedback signal, the control power supply changes from the first operating state to a preset second operating state and remains unchanged; the second operating state is set to an operating state that outputs a working current; the first operating state is set to a low-current output state that is lower than the working current.

2. The synchronization method for multiple power supplies in parallel according to claim 1, characterized in that: When any control power supply in the second operating state detects a spark flashover, the control power supply will convert the low-level signal output to the bus into a high-level signal, the bus follows the control power supply and is set to a high level, and the bus outputs a feedback signal to each control power supply; the control power supply in the second operating state executes the arc extinguishing processing procedure, and restarts when the control power supply in the second operating state completes the arc extinguishing processing procedure.

3. The synchronization method for multiple power supplies in parallel according to claim 2, characterized in that: When a new control power supply is started while a control power supply is in the second operating state, the new control power supply inputs a high level signal to the bus, the bus follows the new control power supply and is set to a high level, and the bus outputs a feedback signal to each control power supply; the control power supply in the second operating state executes the arc extinguishing processing procedure, and restarts after the control power supply in the second operating state completes the arc extinguishing processing procedure.

4. The synchronization method for multiple power supplies in parallel according to claim 3, characterized in that: The level of the feedback signal is inverted and opposite to the level of the bus.

5. The synchronization method for multiple power supplies in parallel according to claim 3, characterized in that: The level of the feedback signal is the same as the level of the bus.

6. An electric control device, characterized in that: It includes several control power supplies and a bus, wherein the level input terminal and the level output terminal of the control power supply are both connected to the bus communication through the synchronization terminal, and the several control power supplies are connected in parallel; the electronic control device executes the synchronization method of multiple power supplies in parallel as described in any one of claims 1 to 5 above.

7. The electronic control device according to claim 6, characterized in that: The level input terminal and the level output terminal of the control power supply are connected to the synchronization terminal through an isolation circuit; the isolation circuit is provided with a photoelectric coupler or a repeater or a magnetic isolation chip.

8. A control power supply, characterized in that: It comprises a control unit, which executes the synchronization method for connecting multiple power sources in parallel as described in any one of claims 1 to 5.

9. A purifier, characterized in that: It comprises an electric field component and a plurality of control power supplies, wherein the electric field component is respectively connected to the plurality of control power supplies for control; the purifier executes the synchronization method of multiple power supplies in parallel as described in any one of claims 1 to 5.

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