A three-phase electric detection circuit of a controller and a controller device

Abstract

The utility model provides a kind of three-phase electric detection circuit and controller equipment of controller, the circuit includes being located in the three-phase circuit of controller and at least four resistors, the first end of at least three resistors in the four resistors is respectively connected with the live wire of the three-phase circuit, the first end of another resistor is connected with the zero line of the three-phase circuit, the end of the four resistors is commonly connected to neutral point, wherein, the neutral point is as the reference ground potential of circuit;Voltage detection module is used to respectively collect the voltage signal between live wire, zero line and the neutral point in the three-phase circuit, and according to the voltage signal, whether the three-phase circuit exists open circuit fault or zero live wire reverse connection fault is judged;Wherein, the voltage detection module at least includes the number of light coupling relay corresponding to the live wire of the three-phase circuit, and the light coupling relay is respectively connected between the live wire of the three-phase circuit and the neutral point.

Description

Technical Field

[0001] This application relates to the field of detection circuit technology, and in particular to a three-phase electrical detection circuit and controller device for a controller. Background Technology

[0002] With the rapid development of science and technology and the improvement of people's living standards, fire prevention facilities have become essential equipment in residential buildings.

[0003] Fire-resistant roller shutters, as one of the fire-prevention facilities in residential buildings, are usually directly controlled by a controller. The controller uses a three-phase four-wire system, which includes three live wires and one neutral wire. However, during the construction of fire-resistant roller shutters, the four wires are often connected incorrectly. After incorrect connection, a lot of time is spent troubleshooting. Therefore, it is necessary to design a circuit for rapid detection of the main power wiring status. Utility Model Content

[0004] This application provides a three-phase electrical detection circuit and controller device for a controller, in order to at least address the shortcomings of the aforementioned related technologies.

[0005] In a first aspect, embodiments of this application provide a three-phase electrical detection circuit for a controller, including a three-phase circuit disposed within the controller and at least four resistors. The first ends of at least three of the four resistors are respectively connected to the live wire of the three-phase circuit, and the first end of the other resistor is connected to the neutral wire of the three-phase circuit. The ends of the four resistors are connected to the neutral point, wherein the neutral point serves as the reference ground potential of the circuit.

[0006] The voltage detection module is used to collect the voltage signals between the live wire, neutral wire and neutral point in the three-phase circuit, and to determine whether there is an open circuit fault or a reverse connection fault between the live and neutral wires in the three-phase circuit based on the voltage signals.

[0007] The voltage detection module includes at least an optocoupler relay corresponding to the number of live wires in the three-phase circuit, and the optocoupler relays are connected in series between the live wires of the three-phase circuit and the neutral point.

[0008] Furthermore, the voltage detection module also includes a main control chip, which sequentially activates each of the optocoupler relays via control signals to detect whether there is an open circuit fault in the neutral wire.

[0009] Furthermore, the voltage detection module also includes a rectifier diode and an operational amplifier connected in series with the rectifier diode. The rectifier diode is used to output a rectified signal to the operational amplifier, and the operational amplifier is used to amplify the rectified signal and output it to the main control chip.

[0010] Furthermore, the voltage detection module also includes two feedback resistors, which are respectively connected to the ground terminal and the output terminal of the operational amplifier.

[0011] Furthermore, a current-limiting resistor is connected between the control terminal of the optocoupler relay and the main control chip.

[0012] This utility model also proposes a controller device, which includes the three-phase electrical detection circuit of the controller described above.

[0013] Compared to related technologies, the three-phase electrical detection circuit and controller device provided in this application embodiment connect the first ends of three resistors to the live wires of the three-phase circuit, the first end of another resistor to the neutral wire of the three-phase circuit, and connect the ends of the four resistors together to the neutral point. The voltage detection module collects the voltage signals between the live wire, the neutral wire and the neutral point in the three-phase circuit, and determines whether there is an open circuit fault or a reverse connection fault between the live and neutral wires in the three-phase circuit based on the voltage signals.

[0014] Details of one or more embodiments of this application are set forth in the following drawings and description to make other features, objects and advantages of this application more readily apparent. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0016] Figure 1 This is a circuit diagram of the neutral potential point formed by the star connection of resistors in the first embodiment of this utility model;

[0017] Figure 2 This is a diagram of the three-phase electrical detection main circuit in the first embodiment of this utility model;

[0018] Figure 3 This is a circuit diagram illustrating the three-phase electrical detection circuit of the controller in the second embodiment of this utility model.

[0019] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0021] Obviously, the accompanying drawings described below are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios based on these drawings without any creative effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, any changes to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of this application.

[0022] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0023] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms “a,” “an,” “an,” “the,” and similar words used in this application do not indicate quantity limitation and may represent singular or plural. The terms “comprising,” “including,” “having,” and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units not listed, or may include other steps or units inherent to such processes, methods, products, or devices. The terms “connected,” “linked,” “coupled,” and similar words used in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Example

[0024] Please see Figures 1 to 2The diagram shows a three-phase electrical detection circuit for a controller according to a first embodiment of the present invention. The circuit includes a three-phase circuit and at least four resistors disposed within the controller. The first ends of at least three of the four resistors are respectively connected to the live wire of the three-phase circuit, and the first end of the other resistor is connected to the neutral wire of the three-phase circuit. The ends of the four resistors are connected to the neutral point, wherein the neutral point serves as the reference ground potential of the circuit.

[0025] The voltage detection module is used to collect the voltage signals between the live wire, neutral wire and neutral point in the three-phase circuit, and to determine whether there is an open circuit fault or a reverse connection fault between the live and neutral wires in the three-phase circuit based on the voltage signals.

[0026] The voltage detection module includes at least an optocoupler relay corresponding to the number of live wires in the three-phase circuit, and the optocoupler relays are connected in series between the live wires of the three-phase circuit and the neutral point.

[0027] In specific implementation, L1, L2, L3, and N represent three live wires and one neutral wire, respectively. The first ends of resistors R10, R11, and R12 are connected to the live wires L1, L2, and L3, and the first end of resistor R13 is connected to the neutral wire N. Resistors R10, R11, R12, and R13 are connected in parallel. In some optional embodiments, resistors R10, R11, R12, and R13 can also be connected in series to form an equivalent resistance value, and the number is not limited to four.

[0028] Furthermore, the voltage detection module also includes a main control chip, which sequentially turns on each of the optocoupler relays through a control signal to detect whether there is an open circuit fault in the neutral wire. A current-limiting resistor is connected between the control terminal of the optocoupler relay and the main control chip.

[0029] Specifically, the voltage detection module further includes a rectifier diode and an operational amplifier connected in series with the rectifier diode. The rectifier diode is used to output a rectified signal to the operational amplifier, and the operational amplifier is used to amplify the rectified signal and output it to the main control chip. The voltage detection module also includes two feedback resistors, which are respectively connected to the ground terminal and the output terminal of the operational amplifier.

[0030] In practical implementation, the optocoupler relay ISO1 is responsible for turning on or off the connection between the live wire and the neutral wire. The current limiting resistor R1 is connected to the main control chip to control the conduction between the live wire and the neutral point. The rectifier diode D1 outputs the rectified signal to the operational amplifier U1A. U1A and the feedback resistors R5 and R8 transmit the collected signal to the main control chip for processing through resistor R9.

[0031] In this embodiment, the three-phase alternating current consists of three sine waves with a phase difference of 120 degrees. The neutral point is the zero line. The voltage amplitude is determined by detecting the voltage value during the positive half-cycle of the sine wave. The neutral line is checked for open circuits by sequentially connecting the three live wires to the neutral wire. Specifically, the fault diagnosis logic is as follows:

[0032] When a sinusoidal voltage waveform is detected between the neutral wire (N) and the neutral point (GND), it is determined that there is a fault where the live wire and the neutral wire are reversed. The principle of the main power detection circuit is as follows: Figure 3 As shown, when L1, L2, L3, and N are connected to three live wires and one neutral wire respectively, and R10, R11, and R12 are respectively input with sine waves that are 120° out of phase, then... Figure 3 The GND in the circuit is 0 volts. The voltage value can be obtained by detecting the voltage between L1, L2, L3, N and GND. When the live wire and neutral wire are reversed, it will cause a sinusoidal voltage waveform to be output on the N phase.

[0033] When the voltage between any live wire (L1 / L2 / L3) and the neutral point (GND) is zero, the live wire is determined to be open circuit fault.

[0034] When the voltage between the neutral line (N) and the neutral point (GND) is abnormal, the neutral line is considered to be open-circuit fault.

[0035] This utility model also proposes a controller device, which includes the three-phase electrical detection circuit of the controller described above.

[0036] In summary, the three-phase electrical detection circuit of the controller in the above embodiments of this utility model connects the first ends of three resistors to the live wires of the three-phase circuit, the first end of another resistor to the neutral wire of the three-phase circuit, and connects the ends of the four resistors together to the neutral point. The voltage detection module collects the voltage signals between the live wire, the neutral wire and the neutral point in the three-phase circuit, and determines whether there is an open circuit fault or a reverse connection fault between the live and neutral wires in the three-phase circuit based on the voltage signals.

[0037] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A three-phase power detection circuit of a controller, characterized by, It includes a three-phase circuit and at least four resistors located within the controller. The first ends of at least three of the four resistors are connected to the live wire of the three-phase circuit, and the first end of the other resistor is connected to the neutral wire of the three-phase circuit. The ends of the four resistors are connected to the neutral point, which serves as the reference ground potential of the circuit. The voltage detection module is used to collect the voltage signals between the live wire, neutral wire and neutral point in the three-phase circuit, and to determine whether there is an open circuit fault or a reverse connection fault between the live and neutral wires in the three-phase circuit based on the voltage signals. The voltage detection module includes at least an optocoupler relay corresponding to the number of live wires in the three-phase circuit, and the optocoupler relays are connected in series between the live wires of the three-phase circuit and the neutral point.

2. A three-phase electrical detection circuit for a controller according to claim 1, characterised in that, The voltage detection module also includes a main control chip, which sequentially activates each of the optocoupler relays via control signals to detect whether there is an open circuit fault in the neutral wire.

3. The three-phase electrical detection circuit of the controller according to claim 2, characterized in that, The voltage detection module further includes a rectifier diode and an operational amplifier connected in series with the rectifier diode. The rectifier diode is used to output a rectified signal to the operational amplifier, and the operational amplifier is used to amplify the rectified signal and output it to the main control chip.

4. The three-phase electrical detection circuit of the controller according to claim 3, characterized in that, The voltage detection module also includes two feedback resistors, which are respectively connected to the ground terminal and the output terminal of the operational amplifier.

5. The three-phase electrical detection circuit of the controller according to claim 2, characterized in that, A current-limiting resistor is connected between the control terminal of the optocoupler relay and the main control chip.

6. A controller device, characterized in that, The controller device includes a three-phase electrical detection circuit of the controller according to any one of claims 1-5.

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