Control module based on USB interface communication

Abstract

The utility model discloses a control module based on USB interface communication. The control module comprises a main control chip, an uplink communication circuit and a relay control circuit. The uplink communication circuit is connected with the special transformer terminal through a USB interface so as to receive a control command of the special transformer terminal; the uplink communication circuit is connected with the main control chip and sends a control command to the main control chip; the main control chip is connected with the relay control circuit, and controls the relay control circuit to control on-off of a switch of the relay based on the control command, so that the relay is connected with the circuit breaker; and the relay controls the circuit breaker to be in an opening state or a closing state based on the control command. According to the utility model, the control command can be sent to the relay step by step to control the circuit breaker, so that the communication in the whole control process can be kept stable. In addition, the special transformer terminal and the control module are connected through the USB interface, control commands are transmitted, and operation is easy, convenient and rapid.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breaker communication, and in particular to a control module based on USB interface communication. Background Art

[0002] With the development of intelligence, low-voltage special transformer line control circuit breakers are increasingly inclined to adopt intelligent control technology. At present, various forms of circuit breakers are connected to low-voltage special transformer lines, mainly in two control modes: level type and pulse type. These circuit breakers are usually equipped with microcontroller units (MCUs), which can achieve precise control of the opening and closing states based on the control of the special transformer terminal, and can automatically make judgments based on the monitored circuit state. Generally speaking, technicians will use the special transformer terminal to directly control the opening and closing of the circuit breaker on site.

[0003] However, directly controlling the opening and closing of circuit breakers through dedicated transformer terminals may cause communication instability or interruption. Secondly, the control steps are also relatively cumbersome, which often affects the normal operation of the power system. Utility Model Content

[0004] The purpose of the utility model is to provide a control module based on USB interface communication to solve the technical problems of unstable communication and complicated steps when controlling the opening and closing of circuit breakers in the prior art. The preferred technical solutions among the many technical solutions provided by the utility model can produce many technical effects as described below.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The utility model provides a control module based on USB interface communication, the control module includes a main control chip, an uplink communication circuit and a relay control circuit; the uplink communication circuit is connected to a dedicated transformer terminal through the USB interface to receive a control command from the dedicated transformer terminal; the uplink communication circuit is connected to the main control chip to send the control command to the main control chip; the main control chip is connected to the relay control circuit, and controls the relay control circuit based on the control command to close the switch of the relay, so that the relay is connected to the circuit breaker; the relay controls the circuit breaker to be in an open state or a closed state based on the control command.

[0007] In some embodiments, the first end of the relay control circuit is connected to the IO pin of the main control chip, and the second and third ends of the relay control circuit are connected to the circuit breaker; the main control chip outputs a high-level signal through the IO pin, controls the relay control circuit to energize the coil of the relay, and then controls the switch of the relay to close.

[0008] In some embodiments, the relay control circuit includes a tenth resistor, an eleventh resistor, a twelfth resistor, a second transistor and a second diode; one end of the tenth resistor is connected to a power supply, and the other end of the tenth resistor is connected to the first end of the relay and the negative electrode of the second diode; one end of the eleventh resistor is connected to the first end of the relay control circuit, and the other end of the eleventh resistor is connected to one end of the twelfth resistor and the base of the second transistor; the other end of the twelfth resistor and the emitter of the second transistor are grounded, and the collector of the second transistor is connected to the second end of the relay and the positive electrode of the second diode; the third end of the relay is connected to the second end of the relay control circuit, and the fourth end of the relay is connected to the third end of the relay control circuit, and when the coil of the relay is energized, the contacts are attracted to close.

[0009] In some embodiments, the resistance of the tenth resistor is 9.5 ohms to 10.5 ohms; the resistance of the eleventh resistor is 1425 ohms to 1575 ohms; the resistance of the twelfth resistor is 95 kilo-ohms to 105 kilo-ohms; the model of the second transistor is LMBT3904LT1G; the model of the second diode DR3 is 1N4007; the model of the relay is HF118F / 005-1HS5, the coil resistance of the relay is 113 ohms, and the voltage across the coil is 4.3 volts.

[0010] In some embodiments, the uplink communication circuit is connected to the dedicated transformer terminal through the USB interface; the first end and the second end of the uplink communication circuit are connected to the USB interface, and the dedicated transformer terminal provides a DC power supply to the first end and the second end of the uplink communication circuit; the fifth end and the sixth end of the uplink communication circuit are both connected to the main control chip, and the third end and the fourth end of the uplink communication circuit are both grounded.

[0011] In some embodiments, the control module includes an electromagnetic compatibility protection circuit; the electromagnetic compatibility protection circuit is used to protect the USB interface; the first end and the sixth end of the electromagnetic compatibility protection circuit are both connected to the fifth end of the upstream communication circuit; the third end and the fourth end of the electromagnetic compatibility protection circuit are both connected to the sixth end of the upstream communication circuit; the second end of the electromagnetic compatibility protection circuit is grounded, and the fifth end of the electromagnetic compatibility protection circuit is connected to a power supply.

[0012] In some embodiments, the control module includes a telesignaling detection circuit; the telesignaling detection circuit is used to obtain the closing state or the opening state of the circuit breaker; the telesignaling detection circuit includes an input terminal connected to the main control chip and a telesignaling terminal connected to the status terminal of the circuit breaker.

[0013] In some embodiments, the remote signal detection circuit includes a first remote signal detection circuit; the first remote signal detection circuit includes a first input terminal connected to the main control chip and a first remote signal terminal connected to the status terminal of the circuit breaker; the first remote signal detection circuit includes a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a second capacitor, a third capacitor, a third diode, a first thyristor and a second optocoupler; one end of the thirteenth resistor is connected to a power supply, one end of the fourteenth resistor is connected to the first input terminal, and the other end of the fourteenth resistor is connected to the other end of the thirteenth resistor, one end of the second capacitor and the first end of the second optocoupler; the second end of the second optocoupler is connected to the other end of the second capacitor and grounded, the third end of the second optocoupler is connected to the positive electrode of the third diode and one end of the sixteenth resistor, and the third end of the second optocoupler is connected to the negative electrode of the third diode and one end of the fifteenth resistor; one end of the third capacitor is connected to the other end of the fifteenth resistor and a power supply, the other end of the third capacitor is connected to the other end of the sixteenth resistor, the first remote signal terminal and one end of the first thyristor, and the other end of the first thyristor is grounded.

[0014] In some embodiments, the control module includes a light emitting unit; the light emitting unit is connected to the main control chip, and the main control chip controls the light emitting unit to change a light emitting state based on a state of the circuit breaker.

[0015] In some embodiments, the control module also includes a detection circuit; the detection circuit is used to check the access status of the circuit breaker; the first end and the second end of the detection circuit are connected to the circuit breaker, and the third end of the detection circuit is connected to the main control chip; if the access status of the circuit breaker is normal, the detection circuit pulls down the level of the third end of the detection circuit.

[0016] Implementing one of the above technical solutions of the utility model has the following advantages or beneficial effects: In the utility model, by setting an uplink communication circuit for receiving the control command of the dedicated transformer terminal, the main control chip controls the relay control circuit to control the switch of the relay based on the control command, so that the relay is connected to the circuit breaker, and the relay controls the circuit breaker to be in the open state or the closed state based on the control command, and the control command can be sent to the relay step by step to control the circuit breaker, so that the communication of the entire control process can be kept stable. In addition, the dedicated transformer terminal is connected to the control module through the USB interface, and the control command is transmitted, which is simple and quick to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0018] Figure 1 It is a schematic diagram of an application scenario of the control module of an embodiment of the utility model;

[0019] Figure 2 It is a structural schematic diagram of a control module of an embodiment of the utility model;

[0020] Figure 3 It is a schematic diagram of an uplink communication circuit of an embodiment of the utility model;

[0021] Figure 4 Schematic diagram of an electromagnetic compatibility protection circuit according to an embodiment of the present utility model;

[0022] Figure 5 Schematic diagram of a detection circuit of an embodiment of the utility model;

[0023] Figure 6 Schematic diagram of a relay control circuit of an embodiment of the utility model;

[0024] Figure 7 Schematic diagram of a first remote signal detection circuit of an embodiment of the utility model;

[0025] Figure 8 It is a schematic diagram of the second remote signal detection circuit of the embodiment of the utility model.

[0026] In the figure: 1. control module; 10. uplink communication circuit; 11. main control chip; 12. relay control circuit; 13. remote signal detection circuit; 14. light-emitting unit. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the utility model clearer, the various exemplary embodiments to be described below will refer to the corresponding drawings, which constitute a part of the exemplary embodiments, wherein various exemplary embodiments that may be used to implement the utility model are described. Unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation methods described in the following exemplary embodiments do not represent all implementation methods consistent with the present disclosure. It should be understood that they are only examples of processes, methods, and devices that are consistent with some aspects of the utility model disclosed as detailed in the attached claims, and other embodiments may also be used, or the embodiments listed herein may be modified in structure and function without departing from the scope and essence of the utility model.

[0028] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", etc. indicate the orientation or position relationship based on the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the elements referred to must have a specific orientation, be constructed and operated in a specific orientation. The terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. The term "multiple" means two or more. The terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a communication connection, a direct connection, an indirect connection through an intermediate medium, and can be the internal connection of two elements or the interaction relationship between two elements. The term "and / or" includes any and all combinations of one or more related listed items. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0029] In order to illustrate the technical solution of the present invention, a specific embodiment is provided below, in which only the parts related to the embodiment of the present invention are shown.

[0030] like Figure 1 As shown, the utility model provides a control module 1 based on USB interface communication.

[0031] In some embodiments, the control module 1 can be connected to a dedicated transformer terminal to receive parameter setting commands from the dedicated transformer terminal. In some embodiments, the control module 1 can be connected to a relay, and the control module 1 can set the working mode of the relay according to the parameter setting command, and the working mode can include level mode or pulse mode.

[0032] In some embodiments, the control module 1 may include a remote signal terminal, and the circuit breaker may include a status terminal; the remote signal terminal may be connected to the status terminal, and the control module 1 may determine the current status of the circuit breaker by detecting a high level signal or a low level signal, and the status of the circuit breaker may include an open state or a closed state. The control module 1 may upload the status of the circuit breaker to the dedicated transformer terminal.

[0033] In some embodiments, the control module 1 may include a main control chip 11, an uplink communication circuit 10, and a relay control circuit 12. In some embodiments, the uplink communication circuit 10 may be connected to a dedicated transformer terminal to receive a control command from the dedicated transformer terminal; the uplink communication circuit 10 may be connected to the main control chip 11 to send a control command to the main control chip 11. In some embodiments, the main control chip 11 may be connected to a relay control circuit 12, and based on the control command, the relay control circuit 12 may be controlled to close the switch of the relay, so that the relay is connected to the circuit breaker; the relay may control the circuit breaker to be in an open state or a closed state based on the control command.

[0034] In some embodiments, the uplink communication circuit 10 can be connected to the dedicated terminal through a USB interface. Figure 3 As shown, the first and second ends of the upstream communication circuit 10 can be connected to the USB interface, and the dedicated terminal can provide a DC power supply to the first and second ends of the upstream communication circuit 10, and the input range can be 4.5 volts to 5.5 volts. The fifth end USB_D_N and the sixth end USB_D_P of the upstream communication circuit 10 are both connected to the main control chip 11, and the third and fourth ends of the upstream communication circuit 10 are both grounded.

[0035] In some embodiments, the control module 1 may include an electromagnetic compatibility protection circuit. The electromagnetic compatibility protection circuit may be used to protect the USB interface. Figure 4 As shown, the first end and the sixth end of the electromagnetic compatibility protection circuit are both connected to the fifth end USB_D_N of the upstream communication circuit 10; the third end and the fourth end of the electromagnetic compatibility protection circuit are both connected to the sixth end USB_D_P of the upstream communication circuit 10; the second end of the electromagnetic compatibility protection circuit is grounded, and the fifth end of the electromagnetic compatibility protection circuit is connected to the power supply, wherein the peak voltage of the power supply can be 3.3 volts.

[0036] In some embodiments, the control module 1 may further include a detection circuit. The detection circuit may be used to check the connection status of the circuit breaker, that is, whether the circuit breaker is connected normally. Figure 5 As shown, the first terminal V3+ and the second terminal V3- of the detection circuit can be connected to the circuit breaker, and the third terminal V3_RELAYDET can be connected to the pin of the main control chip 11. If the access state of the circuit breaker is normal, the detection circuit will pull down the level of the third terminal V3_RELAYDET of the detection circuit. The main control chip 11 can monitor the level of the third terminal V3_RELAYDET of the detection circuit through the pin to determine whether the circuit breaker is connected normally.

[0037] In some embodiments, the detection circuit may include a first resistor RR9, a second resistor RR10, a third resistor RR11, a fourth resistor RR12, a fifth resistor RR13, a sixth resistor RR14, a seventh resistor RR44, an eighth resistor RR47, a ninth resistor RR48, a first diode DR2, a first optical coupler OP2, a first capacitor CR4, and a first transistor RQ4. One end of the first resistor RR9 is connected to the first end V3+ of the detection circuit, and the other end of the first resistor RR9 is connected to one end of the second resistor RR10. One end of the third resistor RR11 is connected to the other end of the second resistor RR10, and the other end of the third resistor RR11 is connected to one end of the fourth resistor RR12. One end of the fifth resistor RR13 is connected to the other end of the fourth resistor RR12, and the other end of the fifth resistor RR13 is connected to one end of the sixth resistor RR14. The cathode of the first diode DR2 is connected to the other end of the sixth resistor RR14, and the anode of the first diode DR2 is connected to the second end V3- of the detection circuit. The first end of the first optical coupler OP2 is connected to the cathode of the first diode DR2, the second end of the first optical coupler OP2 is connected to the anode of the first diode DR2, the third end of the first optical coupler OP2 is connected to one end of the seventh resistor RR44, one end of the ninth resistor RR48 and one end of the first capacitor CR4, and the fourth end of the first optical coupler OP2 is connected to one end of the eighth resistor RR47 and a power supply, wherein the peak voltage of the power supply may be 3.3 volts. The other end of the seventh resistor RR44 and the other end of the first capacitor CR4 are both grounded, and the other end of the eighth resistor RR47 is connected to the third end V3_RELAYDET of the detection circuit. The collector of the first transistor RQ4 is connected to the third end V3_RELAYDET of the detection circuit, the base of the first transistor RQ4 is connected to the other end of the ninth resistor RR48, and the emitter of the first transistor RQ4 is grounded.

[0038] In some embodiments, the resistance of the first resistor RR9, the second resistor RR10, the third resistor RR11, the fourth resistor RR12, the fifth resistor RR13 and the sixth resistor RR14 can be 484.5 kilo-ohms to 535.5 kilo-ohms, for example, 510 kilo-ohms. The model of the first diode DR2 can be 1N4007W. The model of the first optical coupler OP2 can be QX816D-Cuh-ST. The resistance of the seventh resistor RR44 can be 190 kilo-ohms to 210 kilo-ohms, for example, 200 kilo-ohms; the resistance of the eighth resistor RR47 can be 95 kilo-ohms to 105 kilo-ohms, for example, 100 kilo-ohms; the resistance of the ninth resistor RR48 can be 19 kilo-ohms to 21 kilo-ohms, for example, 20 kilo-ohms. The capacitance of the first capacitor CR4 can be 4.7 microfarads, and the rated voltage of the first capacitor CR4 can be 10 volts.

[0039] In some embodiments, when the circuit breaker is connected normally, the first optical coupler OP2 can be driven to pull down the level of the third terminal V3_RELAYDET of the detection circuit. The main control chip 11 can monitor the level of the third terminal V3_RELAYDET of the detection circuit through the pin to determine whether the circuit breaker is connected normally.

[0040] In some embodiments, Figure 6 As shown, the first terminal V3_RELAY of the relay control circuit 12 can be connected to the IO pin of the main control chip 11, and the second terminal V3+ and the third terminal V3- of the relay control circuit 12 can be connected to the circuit breaker. The main control chip 11 can output a high-level signal through the IO pin to control the relay control circuit 12 to energize the coil of the relay RY3, and then control the switch of the relay RY3 to close.

[0041] In some embodiments, Figure 6 As shown, the relay control circuit 12 may include a tenth resistor RR15, an eleventh resistor RR17, a twelfth resistor RR18, a second triode QR1 and a second diode DR3. One end of the tenth resistor RR15 is connected to a power supply, wherein the peak voltage of the power supply may be 5 volts, and the other end of the tenth resistor RR15 is connected to the first end of the relay RY3 and the cathode of the second diode DR3. One end of the eleventh resistor RR17 is connected to the first end V3_RELAY of the relay control circuit 12, and the other end of the eleventh resistor RR17 is connected to one end of the twelfth resistor RR18 and the base of the second triode QR1. The other end of the twelfth resistor RR18 and the emitter of the second triode QR1 are both grounded, and the collector of the second triode QR1 is connected to the second end of the relay RY3 and the anode of the second diode DR3. The third end of relay RY3 can be connected to the second end V3+ of relay control circuit 12, and the fourth end of relay RY3 can be connected to the third end V3- of relay control circuit 12. When the coil of relay RY3 is energized, the contacts can be attracted to close.

[0042] In some embodiments, the resistance of the tenth resistor RR15 can be 9.5 ohms to 10.5 ohms, for example, 10 ohms; the resistance of the eleventh resistor RR17 can be 1425 ohms to 1575 ohms, for example, 1.5 kilo-ohms; the resistance of the twelfth resistor RR18 can be 95 kilo-ohms to 105 kilo-ohms, for example, 100 kilo-ohms. The model of the second transistor QR1 can be LMBT3904LT1G. The model of the second diode DR3 can be 1N4007W. The model of the relay RY3 can be HF118F / 005-1HS5, the coil resistance of the relay RY3 can be 113 ohms, and the voltage across the coil can be 4.3 volts.

[0043] In some embodiments, Figure 2 As shown, the control module 1 may include a remote signal detection circuit 13. The remote signal detection circuit 13 may be used to obtain the state of the circuit breaker, such as the closing state or the opening state of the circuit breaker. The remote signal detection circuit 13 may include an input terminal connected to the main control chip 11 and a remote signal terminal connected to the state terminal of the circuit breaker. When the level of the remote signal terminal is pulled low, the optical coupler in the remote signal detection circuit 13 may be driven to pull the level of the input terminal into a low-level signal. At this time, the pin of the main control chip 11 detects the change in level and determines the state of the remote signal terminal. The state of the remote signal terminal has a corresponding relationship with the state of the circuit breaker.

[0044] In some embodiments, the remote signal detection circuit 13 may include a first remote signal detection circuit and a second remote signal detection circuit. Figure 7 As shown, the first remote signal detection circuit may include a first input terminal MCU_YX3 connected to the main control chip 11 and a first remote signal terminal YX3 connected to the status terminal of the circuit breaker. Figure 8 As shown, the second remote signal detection circuit may include a second input terminal MCU_YX4 connected to the main control chip 11 and a second remote signal terminal YX3 connected to the status terminal of the circuit breaker.

[0045] In some embodiments, Figure 7 As shown, the first remote signal detection circuit may include a thirteenth resistor RT9, a fourteenth resistor RT11, a fifteenth resistor RT10, a sixteenth resistor RT12, a second capacitor CT5, a third capacitor CT6, a third diode DT3, a first thyristor TVS5, and a second optical coupler OP7. One end of the thirteenth resistor RT9 may be connected to a power supply, wherein the peak voltage of the power supply may be 3.3 volts, one end of the fourteenth resistor RT11 may be connected to the first input terminal MCU_YX3, and the other end of the fourteenth resistor RT11 may be connected to the other end of the thirteenth resistor RT9, one end of the second capacitor CT5, and the first end of the second optical coupler OP7. The second end of the second optical coupler OP7 may be connected to the other end of the second capacitor CT5 and grounded, the third end of the second optical coupler OP7 may be connected to the positive electrode of the third diode DT3 and one end of the sixteenth resistor RT12, and the third end of the second optical coupler OP7 may be connected to the negative electrode of the third diode DT3 and one end of the fifteenth resistor RT10. One end of the third capacitor CT6 can be connected to the other end of the fifteenth resistor RT10 and a power supply, wherein the voltage of the power supply can be 5 volts, and the other end of the third capacitor CT6 can be connected to the other end of the sixteenth resistor RT12, the first remote signal terminal YX3 and one end of the first thyristor TVS5, and the other end of the first thyristor TVS5 is grounded.

[0046] In some embodiments, the resistance of the thirteenth resistor RT9 can be 4653 ohms to 4747 ohms, for example, 4700 ohms. The resistance of the fourteenth resistor RT11 can be 9.5 ohms to 10.5 ohms, for example, 10 ohms. The resistance of the fifteenth resistor RT10 can be 1425 ohms to 1575 ohms, for example, 1500 ohms; the resistance of the sixteenth resistor RT12 can be 1425 ohms to 1575 ohms, for example, 1500 ohms. The capacitance of the second capacitor CT5 can be 680 picofarads, and the rated voltage of the second capacitor CT5 can be 50 volts. The capacitance of the third capacitor CT6 can be 100 nanofarads, and the rated voltage of the third capacitor CT6 can be 50 volts. The model of the third diode DT3 can be IN4007W. The model of the second optical coupler OP7 can be QX816D-Cuh-ST. The model of the first thyristor TVS5 can be SMBJ6.5CA.

[0047] In some embodiments, Figure 8 As shown, the second remote signal detection circuit may include a seventeenth resistor RT13, an eighteenth resistor RT15, ​​a nineteenth resistor RT14, a twentieth resistor RT16, a fourth capacitor CT7, a fifth capacitor CT8, a fourth diode DT4, a second thyristor TVS6, and a third optical coupler OP8. One end of the seventeenth resistor RT13 may be connected to a power supply, wherein the peak voltage of the power supply may be 3.3 volts, one end of the eighteenth resistor RT15 may be connected to the second input terminal MCU_YX4, and the other end of the eighteenth resistor RT15 may be connected to the other end of the seventeenth resistor RT13, one end of the fourth capacitor CT7, and the first end of the third optical coupler OP8. The second end of the third optical coupler OP8 may be connected to the other end of the fourth capacitor CT7 and grounded, the third end of the third optical coupler OP8 may be connected to the positive electrode of the fourth diode DT4 and one end of the twentieth resistor RT16, and the third end of the third optical coupler OP8 may be connected to the negative electrode of the fourth diode DT4 and one end of the nineteenth resistor RT14. One end of the fifth capacitor CT8 can be connected to the other end of the nineteenth resistor RT14 and a power supply, wherein the voltage of the power supply can be 5 volts, and the other end of the fifth capacitor CT8 can be connected to the other end of the twentieth resistor RT16, the second remote signal terminal YX4 and one end of the second thyristor TVS6, and the other end of the second thyristor TVS6 is grounded.

[0048] In some embodiments, the resistance of the seventeenth resistor RT13 can be 4653 ohms to 4747 ohms, for example, 4700 ohms. The resistance of the eighteenth resistor RT15 can be 9.5 ohms to 10.5 ohms, for example, 10 ohms. The resistance of the nineteenth resistor RT14 can be 1425 ohms to 1575 ohms, for example, 1500 ohms; the resistance of the twentieth resistor RT16 can be 1425 ohms to 1575 ohms, for example, 1500 ohms. The capacitance of the fourth capacitor CT7 can be 680 picofarads, and the rated voltage of the fourth capacitor CT7 can be 50 volts. The capacitance of the fifth capacitor CT8 can be 100 nanofarads, and the rated voltage of the fifth capacitor CT8 can be 50 volts. The model of the fourth diode DT4 can be IN4007W. The model of the third optical coupler OP8 can be QX816D-Cuh-ST. The model of the second thyristor TVS6 can be SMBJ6.5CA.

[0049] In some embodiments, Figure 2 As shown, the control module 1 may include a light emitting unit 14. The light emitting unit 14 may be connected to the main control chip 11, and the main control chip 11 may control the light emitting unit 14 to change the light emitting state based on the state of the circuit breaker. For example, the opening state or closing state of the circuit breaker may be indicated by emitting light beams of different colors or wavelengths. The main control chip 11 may be an MCU (microcontroller) chip.

[0050] In the utility model, an uplink communication circuit 10 for receiving control commands from a dedicated transformer terminal is provided, so that the main control chip 11 controls the relay control circuit 12 to control the switch closure of the relay based on the control command, so that the relay is connected to the circuit breaker, and the relay controls the circuit breaker to be in an open state or a closed state based on the control command, and the control command can be sent to the relay step by step to control the circuit breaker, so that the communication of the entire control process can be kept stable. In addition, the dedicated transformer terminal is connected to the control module 1 through a USB interface, and the control command is transmitted, which is simple and quick to operate.

[0051] The embodiment is only a special case and does not indicate that the present invention is implemented in such a way.

[0052] The above description is only the preferred embodiment of the present invention. Those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the guidance of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the protection scope of the present invention.

Claims

1. A control module based on USB interface communication, characterized in that: The control module includes a main control chip, an uplink communication circuit and a relay control circuit; the uplink communication circuit is connected to the dedicated transformer terminal through the USB interface to receive the control command of the dedicated transformer terminal; the uplink communication circuit is connected to the main control chip to send the control command to the main control chip; the main control chip is connected to the relay control circuit, and controls the relay control circuit based on the control command to close the switch of the relay, so that the relay is connected to the circuit breaker; the relay controls the circuit breaker to be in an open state or a closed state based on the control command.

2. The control module based on USB interface communication according to claim 1, characterized in that: The first end of the relay control circuit is connected to the IO pin of the main control chip, and the second and third ends of the relay control circuit are connected to the circuit breaker; the main control chip outputs a high-level signal through the IO pin to control the relay control circuit to energize the coil of the relay, and then control the switch of the relay to close.

3. The control module based on USB interface communication according to claim 1, characterized in that: The relay control circuit includes a tenth resistor, an eleventh resistor, a twelfth resistor, a second transistor and a second diode; one end of the tenth resistor is connected to a power supply, and the other end of the tenth resistor is connected to the first end of the relay and the negative electrode of the second diode; one end of the eleventh resistor is connected to the first end of the relay control circuit, and the other end of the eleventh resistor is connected to one end of the twelfth resistor and the base of the second transistor; the other end of the twelfth resistor and the emitter of the second transistor are grounded, and the collector of the second transistor is connected to the second end of the relay and the positive electrode of the second diode; the third end of the relay is connected to the second end of the relay control circuit, and the fourth end of the relay is connected to the third end of the relay control circuit, and when the coil of the relay is energized, the attraction contacts are closed.

4. The control module based on USB interface communication according to claim 3, characterized in that: The resistance of the tenth resistor is 9.5 ohms to 10.5 ohms; the resistance of the eleventh resistor is 1425 ohms to 1575 ohms; the resistance of the twelfth resistor is 95 kilo-ohms to 105 kilo-ohms; the model of the second transistor is LMBT3904LT1G; the model of the second diode DR3 is 1N4007; the model of the relay is HF118F / 005-1HS5, the coil resistance of the relay is 113 ohms, and the voltage across the coil is 4.3 volts.

5. The control module based on USB interface communication according to claim 1, characterized in that: The uplink communication circuit is connected to the dedicated terminal through the USB interface; the first end and the second end of the uplink communication circuit are connected to the USB interface, and the dedicated terminal provides a DC power supply to the first end and the second end of the uplink communication circuit; the fifth end and the sixth end of the uplink communication circuit are both connected to the main control chip, and the third end and the fourth end of the uplink communication circuit are both grounded.

6. The control module based on USB interface communication according to claim 5, characterized in that: The control module includes an electromagnetic compatibility protection circuit; the electromagnetic compatibility protection circuit is used to protect the USB interface; the first end and the sixth end of the electromagnetic compatibility protection circuit are both connected to the fifth end of the upstream communication circuit; the third end and the fourth end of the electromagnetic compatibility protection circuit are both connected to the sixth end of the upstream communication circuit; the second end of the electromagnetic compatibility protection circuit is grounded, and the fifth end of the electromagnetic compatibility protection circuit is connected to a power supply.

7. The control module based on USB interface communication according to claim 1, characterized in that: The control module includes a remote signal detection circuit; the remote signal detection circuit is used to obtain the closing state or the opening state of the circuit breaker; the remote signal detection circuit includes an input terminal connected to the main control chip and a remote signal terminal connected to the status terminal of the circuit breaker.

8. The control module based on USB interface communication according to claim 7, characterized in that: The remote signal detection circuit includes a first remote signal detection circuit; the first remote signal detection circuit includes a first input terminal connected to the main control chip and a first remote signal terminal connected to the status terminal of the circuit breaker; the first remote signal detection circuit includes a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a second capacitor, a third capacitor, a third diode, a first thyristor and a second optical coupler; one end of the thirteenth resistor is connected to a power supply, one end of the fourteenth resistor is connected to the first input terminal, the other end of the fourteenth resistor is connected to the other end of the thirteenth resistor, one end of the second capacitor and the first end of the second optical coupler; the second end of the second optical coupler is connected to the other end of the second capacitor and grounded, the third end of the second optical coupler is connected to the positive electrode of the third diode and one end of the sixteenth resistor, the third end of the second optical coupler is connected to the negative electrode of the third diode and one end of the fifteenth resistor; one end of the third capacitor is connected to the other end of the fifteenth resistor and a power supply, the other end of the third capacitor is connected to the other end of the sixteenth resistor, the first remote signal terminal and one end of the first thyristor, and the other end of the first thyristor is grounded.

9. The control module based on USB interface communication according to claim 1, characterized in that: The control module includes a light emitting unit; the light emitting unit is connected to the main control chip, and the main control chip controls the light emitting unit to change a light emitting state based on a state of the circuit breaker.

10. The control module based on USB interface communication according to claim 1, characterized in that: The control module also includes a detection circuit; the detection circuit is used to check the access status of the circuit breaker; the first end and the second end of the detection circuit are connected to the circuit breaker, and the third end of the detection circuit is connected to the main control chip; if the access status of the circuit breaker is normal, the detection circuit pulls down the level of the third end of the detection circuit.

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