Control circuit, circuit system and control system

Abstract

The embodiment of the utility model discloses a control circuit, a circuit system and a control system, which are used for preventing power failure during power supply switching. The frequency conversion device comprises a switching module, a frequency conversion module and a control module, the input end of the switching module is connected with a power supply outside the control circuit, the output end of the switching module is electrically connected with the input end of the frequency conversion module, and the output end of the frequency conversion module is connected with a load outside the control circuit; the signal end of the frequency conversion module is electrically connected with the input end of the control module, the output end of the control module is connected with the start-stop end of the frequency conversion module, the control module is in communication connection with the frequency conversion module, and the control module is used for sending a start-stop signal and a frequency signal to the frequency conversion module according to a fault signal sent by the frequency conversion module when the switching module switches the power supply; and the frequency conversion module controls the operation frequency of the load to be the frequency corresponding to the frequency signal based on the start-stop signal and the frequency signal.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the field of power switching, and in particular to a control circuit, a circuit system and a control system. BACKGROUND

[0002] With the continuous development of low-voltage power distribution industry, people pay more and more attention to the performance of the load. The higher the performance of the load, the higher the efficiency of the overall system, and the higher the output. In some scenarios, it is necessary to switch the power corresponding to the load, and the power switching device can supply power to the load through different power sources.

[0003] However, in the existing scheme, switching power will cause the load to be powered off temporarily, and temporary power failure will have a certain impact on the load, affecting work efficiency, and thus affecting output, causing certain economic losses. CONTENT OF THE INVENTION

[0004] Embodiments of the present application provide a control circuit, a circuit system and a control system for preventing power failure when switching power.

[0005] The first aspect of the embodiments of the present application provides a control circuit, comprising: a switching module, a frequency conversion module and a control module;

[0006] The input end of the switching module is connected to the power source outside the control circuit, the output end of the switching module is electrically connected to the input end of the frequency conversion module, and the output end of the frequency conversion module is connected to the load outside the control circuit.

[0007] The signal end of the frequency conversion module is electrically connected to the input end of the control module, the output end of the control module is connected to the start-stop end of the frequency conversion module, the control module is in communication connection with the frequency conversion module, and the control module is used to send start-stop signals and frequency signals to the frequency conversion module according to the fault signals sent by the frequency conversion module when the switching module switches power, so that the frequency conversion module controls the operating frequency of the load to be the frequency corresponding to the frequency signals based on the start-stop signals and the frequency signals.

[0008] Optionally, the control circuit further comprises a circuit breaker.

[0009] The circuit breaker is arranged between the switching module and the frequency conversion module, and the output end of the switching module is electrically connected to the input end of the frequency conversion module through the circuit breaker.

[0010] Optionally, the control module comprises a first communication unit, the frequency conversion module comprises a second communication unit, and the first communication unit and the second communication unit are connected based on a network, so that the control module is in communication connection with the frequency conversion module through the network.

[0011] Optionally, the control module is further provided with a first communication end, the variable frequency module is further provided with a second communication end, the first communication end and the second communication end are electrically connected, so that the control module is in communication connection with the variable frequency module.

[0012] Optionally, the switching module is a dual power supply switching switch.

[0013] Optionally, the control module comprises a control unit and a communication unit.

[0014] The control unit is connected with the communication unit, the control unit is connected with the signal end of the variable frequency module, the communication unit is connected with the start-stop end of the variable frequency module, the control unit is used for receiving the fault signal of the variable frequency module, so as to control the communication unit according to the fault signal, so that the communication unit sends the frequency signal to the variable frequency module.

[0015] Optionally, the number of the variable frequency modules is one, and the number of the loads is one or more.

[0016] The variable frequency modules are electrically connected with the loads respectively.

[0017] Optionally, the number of the variable frequency modules is multiple, and the number of the loads is the same as the number of the variable frequency modules.

[0018] The variable frequency modules are electrically connected with the loads one by one.

[0019] The second aspect of the embodiment of the application provides a circuit system, comprising the control circuit as described above, and further comprising a plurality of power supplies and loads.

[0020] The input end of the control circuit is connected with the plurality of power supplies respectively, and the output end of the control circuit is connected with the loads.

[0021] The third aspect of the embodiment of the application provides a control system, comprising the circuit system as described above, and further comprising a control platform.

[0022] The control platform is connected with the circuit system, and the control platform is used for monitoring the related parameters of the circuit system and controlling the start-stop of the circuit system.

[0023] From the above technical solutions, it can be seen that the embodiment of the application has the following advantages:

[0024] The control circuit of the application is provided with a control module, when the switching module switches the power supply, the control module can receive the fault signal sent by the frequency conversion module, the control module sends the start-stop signal and the frequency signal to the frequency conversion module according to the fault signal, so that the frequency conversion module operates at a specified frequency. In this way, the frequency conversion module continues to work when the power supply is switched, the load does not drop, the work efficiency is not affected, and the output is not affected, and economic losses are not caused. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 An embodiment schematic diagram of the control circuit disclosed by the application is shown in the figure.

[0026] Figure 2 Another embodiment schematic diagram of the control circuit disclosed by the application is shown in the figure.

[0027] Figure 3 An embodiment schematic diagram of the circuit system disclosed by the application is shown in the figure.

[0028] Figure 4 An embodiment schematic diagram of the control system disclosed by the application is shown in the figure. DETAILED DESCRIPTION

[0029] The application will be further described in detail below with reference to the accompanying drawings.

[0030] The embodiment of the application provides a control circuit, a circuit system and a control system, which are used for preventing power failure when switching the power supply.

[0031] The power switching device has been widely applied, and different powers are obtained by switching the power supply. However, in the existing scheme, the switching of the power supply will cause the load to be temporarily powered off due to under-voltage, which will affect the work efficiency and then affect the output. In order to solve the above problems, the application provides a control circuit, a circuit system and a control system, which still control the load to continue to work when switching the power supply, do not affect the work efficiency, and then do not affect the output, and bring better experience to the user.

[0032] In order to make the personnel in the technical field better understand the scheme of the application, the technical scheme in the embodiment of the application will be clearly and completely described below with reference to the drawings in the embodiment of the application. Obviously, the described embodiments are only a part of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the application.

[0033] The terms "first", "second", "third", "fourth" and the like in the description and in the claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects and do not have to be described in a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0034] A control circuit of the present application is described below. Please refer to Figure 1 An embodiment of a control circuit of the present application comprises a switching module, a frequency conversion module and a control module.

[0035] The input end of the switching module is connected to the power supply outside the control circuit, the output end of the switching module is electrically connected to the input end of the frequency conversion module, and the output end of the frequency conversion module is connected to the load outside the control circuit. Specifically, the switching module is used to switch the power supply, the frequency conversion module is used to adjust the frequency of the load operation, and the control module is used to prevent the load from being powered off when the power supply is switched. The electrical signal of the power supply passes through the switching module to the frequency conversion module and then flows to the load, so that the load works.

[0036] The signal end of the frequency conversion module is electrically connected to the input end of the control module, the output end of the control module is connected to the start-stop end of the frequency conversion module, the control module is in communication connection with the frequency conversion module, and the control module is used to send start-stop signals and frequency signals to the frequency conversion module according to the fault signals sent by the frequency conversion module when the switching module switches the power supply, so that the frequency conversion module controls the operating frequency of the load to be the frequency corresponding to the frequency signal based on the start-stop signals and the frequency signals. Specifically, when the power supply is switched, the control module is additionally provided with an independent power supply (such as an uninterruptible power supply UPS, etc.), so that the switching of the power supply will not stop the work of the control module. At the same time, the signal end of the frequency conversion module has a fault signal to the control module, the control module sends a start-stop signal to the start-stop end of the frequency conversion module through the output end, and the control module sends a frequency signal to the frequency conversion module through communication, and then the frequency conversion module controls the load to continue working based on the start-stop signal and the frequency signal.

[0037] The working principle is as follows: when the power supply is not switched, the power supply supplies power to the load through the switching module and the frequency conversion module; when the power supply is switched, the frequency conversion module detects the change and sends a fault signal to the input end of the control module through the signal end, since the control module is powered by an independent power supply, the control module can work, the control module sends a start-stop signal to the start-stop end of the frequency conversion module through the output end, the control module communicates the frequency signal to the frequency conversion module, and the frequency conversion module controls the load to continue working.

[0038] In the embodiment of the present application, the control circuit is provided with a control module. When the switching module switches the power supply, the control module can receive the fault signal sent by the frequency conversion module. The control module sends the start-stop signal and the frequency signal to the frequency conversion module according to the fault signal, so that the frequency conversion module operates at a specified frequency. In this way, the frequency conversion module continues to work when the power supply is switched, the load does not drop, the work efficiency is not affected, and thus the output is not affected, and economic losses are not caused.

[0039] Please refer to Figure 2 Another embodiment of the control circuit of the present application includes: a switching module, a frequency conversion module, a control module and a circuit breaker.

[0040] The input end of the switching module is connected to the power supply outside the control circuit, the output end of the switching module is electrically connected to the input end of the frequency conversion module, and the output end of the frequency conversion module is connected to the load outside the control circuit. Specifically, the switching module is used to switch the power supply, the frequency conversion module is used to adjust the frequency of the load operation, and the control module is used to prevent the load from dropping when the power supply is switched. The electrical signal of the power supply flows to the load through the switching module and the frequency conversion module, so that the load works. Among them, the switching module can be a dual power supply switch, or it can be other types, which are not limited here as long as it can switch multiple power supplies. In this embodiment, a dual power supply switch is taken as an example, that is, there are two power supplies. The frequency conversion module is a frequency converter, and the model specification of the frequency conversion module can be set according to actual needs, which is not limited here. The control module is a control chip provided with a CPU, which can analyze and process the fault signal and generate corresponding start-stop signal and frequency signal.

[0041] The signal end of the frequency conversion module is electrically connected to the input end of the control module, the output end of the control module is connected to the start-stop end of the frequency conversion module, the control module is in communication connection with the frequency conversion module, and the control module is used to send the start-stop signal and the frequency signal to the frequency conversion module according to the fault signal sent by the frequency conversion module when the switching module switches the power supply, so that the frequency conversion module controls the operating frequency of the load to be the frequency corresponding to the frequency signal based on the start-stop signal and the frequency signal. Specifically, when the power supply is switched, the fault signal of the signal end of the frequency conversion module is sent to the control module, the control module sends the start-stop signal to the start-stop end of the frequency conversion module through the output end, and the control module sends the frequency signal to the frequency conversion module through communication, and then the frequency conversion module controls the load to continue to work based on the start-stop signal and the frequency signal.

[0042] The circuit breaker is arranged between the switching module and the frequency conversion module, and the output end of the switching module is electrically connected to the input end of the frequency conversion module through the circuit breaker. The circuit breaker is a kind of switch device with multiple protection functions, such as overload protection, short circuit protection and under-voltage protection, which can effectively protect the circuit.

[0043] There are two ways for the communication between the control module and the frequency conversion module, one is through the communication line connection, and the other is through the network. The following will be described in detail.

[0044] In one embodiment, the control module comprises a first communication unit, and the frequency conversion module comprises a second communication unit, the first communication unit and the second communication unit are connected based on the network, so that the control module is connected with the frequency conversion module through the network. Specifically, the frequency conversion module and the control module are connected through the network, when the frequency conversion module sends the fault signal to the control module in switching power, the control module sends the frequency signal to the frequency conversion module through the network, and then controls the load to continue to work.

[0045] In another embodiment, the control module is further provided with a first communication end, and the frequency conversion module is further provided with a second communication end, the first communication end and the second communication end are electrically connected, so that the control module is connected with the frequency conversion module. Specifically, the frequency conversion module and the control module are both provided with a communication end, and the two communication ends are connected through the communication line, when the frequency conversion module sends the fault signal to the control module in switching power, the control module sends the frequency signal to the frequency conversion module through the communication line, and then controls the load to continue to work.

[0046] This embodiment is described in the second embodiment, that is, the control module and the frequency conversion module are connected through the communication line to realize the communication.

[0047] The control module comprises a control unit and a communication unit;

[0048] The control unit is connected with the communication unit, the control unit is connected with the signal end of the frequency conversion module, the communication unit is connected with the start-stop end of the frequency conversion module, the control unit is used for receiving the fault signal of the frequency conversion module, and the communication unit is controlled according to the fault signal, so that the communication unit sends the frequency signal to the frequency conversion module. Specifically, in one embodiment, the fault signal can be a high level signal, when the control unit receives the high level signal, the corresponding start-stop signal is generated based on the circuit structure or the software program, the start-stop signal can also be a high level signal, and then the frequency signal is sent, wherein the frequency signal contains a preset frequency, which can be set in advance. The communication unit sends the frequency signal to the frequency conversion module through the network or the communication line.

[0049] It can be understood that the number of frequency conversion modules can be set according to actual needs, and the number is not limited here. When the frequency conversion module is only one, it can be connected with one or more loads, and when the frequency conversion module is multiple, it can be connected with the load one by one. In an embodiment, the number of frequency conversion modules is one, and the number of loads is one or more; the frequency conversion modules are electrically connected with the plurality of loads respectively. In another embodiment, the number of frequency conversion modules is multiple, and the number of loads is the same as the number of frequency conversion modules; the plurality of frequency conversion modules are electrically connected with the plurality of loads one by one. In this embodiment, one frequency converter and one load are described.

[0050] The working principle is as follows: under the condition that the power is not switched, the load is powered by one of the power supply 1 or the power supply 2. It is assumed that the power supply 1 is used to power at the beginning, the power supply 1 provides power of a certain frequency to the load through the switching module and the frequency conversion module, so that the load works normally. Later, the power supply is switched from the power supply 1 to the power supply 2, the switching module works, and the frequency conversion module detects that the power supply has been switched and sends a fault signal to the control module. Since the control module has an independent power supply to supply power to it, the control module can still work, the control module generates start-stop signals and frequency signals corresponding to the fault signals, and sends the two signals to the frequency conversion module. The frequency conversion module operates at a specified frequency according to the two signals to ensure that the load does not power off.

[0051] In this embodiment, the control circuit is provided with a control module, which can receive the fault signal sent by the frequency conversion module when the switching module switches the power supply. The control module sends start-stop signals and frequency signals to the frequency conversion module according to the fault signal, so that the frequency conversion module operates at a specified frequency. In this way, the frequency conversion module continues to work when the power supply is switched, the load does not power off, the working efficiency is not affected, and the output is not affected, so that economic losses are not caused.

[0052] The above describes a control circuit in an embodiment of the application, and the following describes a circuit system in an embodiment of the application. Please refer to Figure 3 An embodiment of a circuit system in an embodiment of the application includes: the control circuit of the foregoing embodiment, and further includes: a plurality of power supplies and loads;

[0053] The input end of the control circuit is connected with the plurality of power supplies respectively, and the output end of the control circuit is connected with the loads.

[0054] The working principle is as follows: the control circuit can select one of the plurality of power supplies according to actual needs, and use the selected power supply to power the load, so that the load operates at a specified frequency.

[0055] In the embodiment of the application, the circuit system can adapt to the needs of the user, select a suitable power supply to supply power to the load, and improve production efficiency.

[0056] The control system of the application will be described below, please refer to Figure 4 An embodiment of the control system of the application comprises the circuit system of the foregoing embodiment, and further comprises a control platform.

[0057] The control platform is connected with the circuit system, and the control platform is used for monitoring the related parameters of the circuit system and controlling the start and stop of the circuit system.

[0058] In the embodiment, based on the control platform, the user can intuitively monitor the related parameters of the circuit system, issue an alarm when the related parameters have a problem, and automatically control the start and stop of the circuit system, or customize the control of the circuit system by the user, thereby improving work efficiency.

[0059] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing embodiments, and will not be repeated here.

[0060] In several embodiments provided in the application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0061] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. According to actual needs, some or all of the units can be selected to achieve the purpose of the embodiment.

[0062] In addition, each functional unit in each embodiment of the application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit.

[0063] The above-described embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A control circuit, characterized by include: Switching module, frequency converter module, and control module; The input terminal of the switching module is connected to a power source outside the control circuit, the output terminal of the switching module is electrically connected to the input terminal of the frequency converter module, and the output terminal of the frequency converter module is connected to a load outside the control circuit. The signal terminal of the frequency converter module is electrically connected to the input terminal of the control module, and the output terminal of the control module is connected to the start / stop terminal of the frequency converter module. The control module is communicatively connected to the frequency converter module. When the switching module switches power, the control module sends a start / stop signal and a frequency signal to the frequency converter module according to the fault signal sent by the frequency converter module, so that the frequency converter module controls the operating frequency of the load to the frequency corresponding to the frequency signal based on the start / stop signal and the frequency signal.

2. The control circuit of claim 1, wherein, The control circuit also includes: a circuit breaker; The circuit breaker is located between the switching module and the frequency converter module, and the output terminal of the switching module is electrically connected to the input terminal of the frequency converter module via the circuit breaker.

3. The control circuit of claim 1, wherein, The control module includes a first communication unit, and the frequency converter module includes a second communication unit. The first communication unit and the second communication unit are connected via a network, so that the control module can communicate with the frequency converter module through the network.

4. The control circuit of claim 1, wherein, The control module is further provided with a first communication terminal, and the frequency converter is further provided with a second communication terminal. The first communication terminal and the second communication terminal are electrically connected so that the control module and the frequency converter can communicate with each other.

5. The control circuit of claim 1, wherein, The switching module is a dual-power switching switch.

6. The control circuit of claim 1, wherein, The control module includes: a control unit and a communication unit; The control unit is connected to the communication unit, the control unit is connected to the signal terminal of the frequency converter module, and the communication unit is connected to the start / stop terminal of the frequency converter module. The control unit is used to receive fault signals from the frequency converter module and control the communication unit according to the fault signals, so that the communication unit sends frequency signals to the frequency converter module.

7. The control circuit of claim 1, wherein, The number of frequency converter modules is one, and the number of loads is one or more. The frequency converter module is electrically connected to each of the loads.

8. The control circuit of claim 1, wherein, The number of frequency converter modules is multiple, and the number of loads is the same as the number of frequency converter modules; Each of the frequency converter modules is electrically connected to one of the loads.

9. Circuitry, characterized by The control circuit as described in any one of claims 1 to 8 further includes: a plurality of power supplies and a load; The input terminals of the control circuit are connected to the plurality of power sources respectively, and the output terminal of the control circuit is connected to the load.

10. A control system characterized by, Including the circuit system as described in claim 9, it further includes: a control platform; The control platform is connected to the circuit system and is used to monitor relevant parameters of the circuit system and control the start and stop of the circuit system.

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