Signal output circuit, power line carrier communication equipment and photovoltaic power generation system

Abstract

The utility model brings forward a signal output circuit, a power line carrier communication device and a photovoltaic power generation system, the signal output circuit comprises an amplification circuit, the amplification circuit comprises a signal input end, a signal output end and a power supply end, the signal input end is used for receiving a first signal, the power supply end is connected to a first power supply, and the signal output end is used for receiving a second signal; the signal output end is used for outputting a second signal; wherein the amplifying circuit is used for amplifying a voltage value corresponding to a high-level signal in the first signal to a rated voltage of the first power supply so as to generate a second signal, the first signal is a power line carrier communication signal, and the second signal is an amplified power line carrier communication signal; and the resonance circuit is connected to the signal output end and is used for converting the second signal into an analog signal. Compared with a special power amplification chip, the signal output circuit provided by the utility model has the advantage that the cost of the signal output circuit can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, and in particular to a signal output circuit, a power line carrier communication device and a photovoltaic power generation system. Background Art

[0002] In the related art, power line carrier communication is a communication technology that uses power lines as transmission media. It superimposes high-frequency signals on power lines to enable power lines to transmit data, thereby achieving the purpose of data communication on power lines.

[0003] In the actual operation process, Figure 5 As shown, the power line carrier communication signal generated by the power line carrier communication device needs to be power amplified by a power amplifier chip to ensure that the power line carrier communication signal can be transmitted normally. However, the cost of the power amplifier chip is high, which leads to a high cost of the power line carrier communication device. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art.

[0005] To this end, a first aspect of the utility model provides a signal output circuit.

[0006] A second aspect of the utility model provides a power line carrier communication device.

[0007] A third aspect of the utility model provides a photovoltaic power generation system.

[0008] The first aspect of the utility model provides a signal output circuit for outputting a power line carrier communication signal, the signal output circuit comprising: an amplifier circuit, the amplifier circuit comprising a signal input terminal, a signal output terminal and a power supply terminal, the signal input terminal is used to receive a first signal, the power supply terminal is connected to a first power supply, and the signal output terminal is used to output a second signal; wherein the amplifier circuit is used to amplify the voltage value corresponding to the high-level signal in the first signal to the rated voltage of the first power supply to generate a second signal, the first signal is a power line carrier communication signal, and the second signal is an amplified power line carrier communication signal; a resonant circuit, the resonant circuit is connected to the signal output terminal, and is used to convert the second signal into an analog signal.

[0009] The signal output circuit provided by the utility model can be used to output a power line carrier communication signal. Specifically, the signal output circuit includes an amplifier circuit. The amplifier circuit is used to amplify the power of the power line carrier communication signal, thereby ensuring that the power line carrier communication signal has sufficient power to transmit information.

[0010] Specifically, the amplifier circuit includes a signal input terminal, a signal output terminal and a power supply terminal, wherein the signal input terminal is used to receive a first signal, and the signal output terminal is used to output a second signal, wherein the first signal is the power line carrier communication signal before amplification, and the second signal is the power line carrier communication signal after amplification. Furthermore, the power supply terminal of the amplifier circuit is connected to the first power supply, and through the amplifier circuit, the voltage value corresponding to the high-level signal in the received first signal can be amplified to the rated voltage value of the power supply circuit to generate the second signal, thereby realizing the amplification of the power of the power line carrier communication signal.

[0011] By setting an amplifier circuit, the voltage value of the high-level signal in the power line carrier communication signal can be amplified to the rated voltage value of the first power supply connected to the amplifier circuit, which can effectively reduce the cost of the signal output circuit compared to using a dedicated power amplifier chip. That is, in the process of amplifying the power line carrier communication signal, the power of the amplified power line carrier communication signal can be controlled by setting the rated voltage value of the first power supply.

[0012] Furthermore, the signal output circuit also includes a resonant circuit, which is connected to the signal output end of the amplifier circuit. The second signal outputted by the signal output end of the amplifier circuit can be converted into an analog signal through the resonant circuit. Moreover, the power of the second signal can be further adjusted through the resonant circuit to ensure the transmission of the second signal, and at the same time, the harmonic component of the second signal can be reduced, thereby improving the electromagnetic compatibility problem of the signal output circuit and ensuring the stable operation of the signal output circuit.

[0013] Specifically, the waveform of the power line carrier communication signal before amplification is usually a digital signal. Through the resonant circuit, the digital signal can be converted into an analog signal, so that the second signal can be transmitted through the power line.

[0014] The signal output circuit provided by the utility model can amplify the voltage value corresponding to the high-level signal in the input power line carrier communication signal before amplification by setting an amplification circuit, so as to amplify the power of the power line carrier communication signal, and further convert the amplified power line carrier communication signal into an analog signal through a resonance circuit, thereby ensuring that the amplified power line carrier communication signal can transmit information normally. Compared with using a dedicated power amplifier chip, the cost of the signal output circuit can be effectively reduced.

[0015] In addition, the signal output circuit in the above technical solution provided by the utility model may also have the following additional technical features:

[0016] In some technical schemes, optionally, the amplification circuit includes: an input unit, wherein the input end of the input unit is used to receive a first signal; an amplification unit, wherein the first input end of the amplification unit is connected to the output end of the input unit, the second input end of the amplification unit is connected to a first power supply, and the output end of the amplification unit is connected to the signal output end; wherein the amplification unit is used to amplify the voltage value corresponding to the high-level signal in the first signal to a rated voltage to generate a second signal.

[0017] In this technical solution, the amplifying circuit includes an input unit. By setting the input unit, the first signal can be received to ensure that the first signal, that is, the power line carrier communication signal before amplification, can be stably received during the operation of the signal output circuit.

[0018] Furthermore, the amplifier circuit also includes an amplifier unit, the first input end of the amplifier unit is connected to the output end of the input unit, and in the process of the input unit receiving the first signal, the first signal can be transmitted to the amplifier circuit for amplification. The second input end of the amplifier circuit is connected to the first power supply, and after the amplifier circuit receives the first signal, the voltage value of the high-level signal in the first signal can be amplified to the rated voltage, that is, to the rated voltage value of the first power supply, to generate a second signal, thereby amplifying the power of the power line carrier communication signal.

[0019] By setting an input unit and an amplifying unit, stable reception of the first signal can be achieved, and the voltage value corresponding to the high-level signal in the first signal can be amplified to the rated voltage value of the first power supply. Compared with using a dedicated power amplifier chip, the cost of the signal output circuit can be effectively reduced.

[0020] In some technical schemes, optionally, the input unit includes: a signal transmission unit, wherein the input end of the signal transmission unit is used to receive a first signal, and the signal transmission unit is used to transmit the first signal; a detection unit, wherein the first input end of the detection unit is connected to a first power supply, the second input end of the detection unit is connected to the output end of the signal transmission unit, and the output end of the detection unit is connected to the first input end of the amplification unit; wherein the detection unit is used to transmit the first signal output by the signal transmission unit to the amplification unit when the actual voltage value of the first power supply is the rated voltage.

[0021] In this technical solution, the input unit includes a signal transmission unit and a detection unit, wherein the signal transmission unit is used to transmit a first signal, and specifically, the input end of the signal transmission unit is used to receive the first signal to realize transmission of the first signal.

[0022] Furthermore, the first input end of the detection unit is connected to the first power supply, the second input end of the detection unit is connected to the output end of the signal transmission unit, and the output end of the detection unit is connected to the first input end of the amplification unit. By setting the detection unit, the actual voltage value output by the first power supply can be detected, and specifically, whether the actual voltage value of the first power supply reaches the rated voltage value of the first power supply can be detected. When the actual voltage value output by the first power supply reaches the rated voltage value, the first signal transmitted by the signal transmission unit can be transmitted to the amplification unit for amplification. On the contrary, when the actual voltage value output by the first power supply is less than the rated voltage value of the first power supply, the first signal transmitted by the signal transmission unit cannot be transmitted to the amplification unit, thereby avoiding that the voltage value corresponding to the high-level signal in the first signal cannot be amplified to the rated voltage value of the first power supply, thereby avoiding that the power of the generated second signal cannot reach the set power.

[0023] By setting up a detection unit, it is possible to detect the actual voltage value output by the first power supply, thereby preventing the first signal from being transmitted to the amplification unit for amplification when the actual voltage value output by the first power supply does not reach the rated voltage value of the first power supply, thereby preventing the power of the generated second signal from failing to reach the set power.

[0024] In some technical schemes, optionally, the signal transmission unit includes: a switch element, an input end of the switch element is used to receive the first signal, and an output end of the switch element is connected to a second input end of the detection unit; a pull-down resistor, one end of the pull-down resistor is connected to the input end of the switch element, and the other end of the pull-down resistor is grounded.

[0025] In this technical solution, the signal transmission unit includes a switch element, and the input end of the switch element is used to receive the first signal. Specifically, when the first signal is in a high-level state, the switch element is in a conducting state, so that the output end of the switch element outputs a high-level signal. On the contrary, when the first signal is in a low-level state, the switch element is in a cut-off state, so that the output end of the switch element outputs a low-level signal. That is, the level state of the signal output by the output end of the switch element is the same as the level state of the first signal, thereby realizing the transmission of the first signal.

[0026] Furthermore, the signal transmission unit further includes a pull-down resistor, one end of which is connected to the input end of the switch component, and the other end of which is grounded. By setting the pull-down resistor, when the input end of the switch component does not receive the first signal, the signal state of the input end of the switch component can be pulled down to a low level state through the pull-down resistor, thereby preventing the signal state of the input end of the switch component from being disturbed by other electrical signals and changing, that is, preventing the switch component from outputting an erroneous signal when the first signal is not received.

[0027] In some technical schemes, optionally, the detection unit includes: an undervoltage locking element, the input end of the undervoltage locking element is connected to the first power supply; an AND gate circuit, the first input end of the AND gate circuit is connected to the output end of the undervoltage locking element, the second input end of the AND gate circuit is connected to the output end of the signal transmission unit, and the output end of the AND gate circuit is connected to the first input end of the amplification unit; wherein the undervoltage locking element is used to output a low-level signal when the actual voltage value of the first power supply is less than the rated voltage, and output a high-level signal when the actual voltage value of the first power supply is equal to the rated voltage.

[0028] In this technical solution, the detection unit may include an undervoltage locking element, the input end of which is connected to the first power supply, wherein when the actual voltage output by the first power supply is less than the rated voltage of the first power supply, the undervoltage locking element outputs a low-level signal, and conversely, when the actual voltage value output by the first power supply is equal to the rated voltage value of the first power supply, the undervoltage locking element outputs a high-level signal.

[0029] Furthermore, the detection unit also includes an AND gate circuit, a first input end of the AND gate circuit is connected to the output end of the undervoltage locking element, a second input end of the AND gate circuit is connected to the output end of the signal transmission unit, and the output end of the AND gate circuit is connected to the first input end of the amplification unit.

[0030] Specifically, when the actual voltage output by the first power supply is equal to the rated voltage of the first power supply, the output end of the undervoltage lockout element outputs a high-level signal. At the same time, if the state of the first signal output by the output end of the signal transmission circuit is a high-level state, both input ends of the AND gate circuit input high-level signals, and the output end of the AND gate circuit outputs a high-level signal. If the state of the first signal output by the output end of the signal transmission circuit is a low-level state, the first input end of the AND gate circuit inputs a high-level signal, the second input end inputs a low-level signal, and the AND gate circuit outputs a low-level signal. That is, when the actual voltage output by the first power supply is equal to the rated voltage of the first power supply, the first signal can be normally transmitted to the amplification unit through the AND gate circuit.

[0031] On the contrary, when the actual voltage output by the first power supply is less than the rated voltage of the first power supply, the output end of the undervoltage lockout element outputs a low-level signal. At this time, no matter whether the output end of the signal transmission circuit outputs a high-level signal or a low-level signal, the output end of the AND gate circuit outputs a low-level signal. That is, when the actual voltage output by the first power supply is less than the rated voltage of the first power supply, the first signal cannot be normally transmitted to the amplification unit through the AND gate circuit. The actual voltage value of the first power supply is detected, and the first signal is not transmitted to the amplification unit for amplification when the actual voltage value output by the first power supply does not reach the rated voltage value of the first power supply, thereby avoiding the power of the generated second signal failing to reach the set power.

[0032] In some technical solutions, optionally, the amplification unit includes: an operational amplifier, a first end of the operational amplifier is connected to the output end of the input unit, a second end of the operational amplifier is connected to the first power supply, and the output end of the operational amplifier is connected to the signal output end.

[0033] In this technical solution, the amplification unit may include an operational amplifier, through which the voltage value corresponding to the high-level signal in the input first signal can be amplified to the rated voltage value of the first power supply connected to the operational amplifier, so as to amplify the power of the power line carrier communication signal.

[0034] By setting the amplification unit as an operational amplifier, the cost of the signal output circuit can be effectively reduced on the basis of amplifying the power of the power line carrier communication signal.

[0035] In some technical solutions, optionally, the signal output end includes a first signal output end and a second signal output end, the first signal output end is connected to the output end of the amplifying unit, and the second signal output end is connected to the output end of the amplifying unit.

[0036] In this technical solution, the signal output end of the amplifier circuit may include a first signal output end and a second signal output end, and the first signal output end and the second signal output end are both connected to the output end of the amplifier unit, that is, the first signal output end and the second signal output end are connected in parallel.

[0037] By setting the signal output terminal of the amplifier circuit as the first signal output terminal and the second signal output terminal, and setting the first signal output terminal and the second signal output terminal to be connected in parallel, it is possible to simultaneously bear the voltage of the amplified power line carrier communication signal through the first signal output terminal and the second signal output terminal, thereby avoiding damage to the signal output terminal of the amplifier circuit when the voltage of the amplified power line carrier communication signal is high, thereby ensuring the stable operation of the signal output circuit.

[0038] In some technical solutions, optionally, the amplification circuit includes a single-channel low-side driver.

[0039] In this technical solution, the amplifier circuit may include a single-channel low-side driver. By setting the amplifier circuit as a single-channel low-side driver, the voltage value corresponding to the high-level signal in the first signal can be amplified to the rated voltage value of the first power supply connected to the single-channel low-side driver, thereby amplifying the power of the power line carrier communication signal. Compared with using a dedicated power amplifier chip, the cost of the signal output circuit can be effectively reduced.

[0040] In some technical schemes, optionally, the resonant circuit includes: a first resistor, one end of which is connected to the signal output end; a first inductor, one end of which is connected to the other end of the first resistor; a first capacitor, one end of which is connected to the other end of the first inductor, and the other end of the first capacitor is used to output the second signal.

[0041] In this technical solution, the resonant circuit may include a first resistor, a first inductor and a first capacitor. Through the first resistor, the first inductor and the first capacitor, the second signal output by the amplifier circuit can be converted to convert the second signal output by the signal output end of the amplifier circuit into an analog signal to ensure that the amplified power line carrier communication signal can transmit information normally.

[0042] The second aspect of the utility model provides a power line carrier communication device, comprising a signal output circuit as in any one of the above technical solutions; and a power line carrier communication chip, which is used to generate a first signal, and the output end of the power line carrier communication chip is connected to the signal input end.

[0043] The power line carrier communication device provided by the utility model includes a power line carrier communication chip. The power line carrier communication chip can generate a power line carrier communication signal, that is, a first signal. Then, the first signal is transmitted to a signal output circuit, and the power of the first signal is amplified by the signal output circuit to generate a second signal, and the waveform of the second signal is converted, and the second signal output by the signal output end of the amplifier circuit is converted into an analog signal to ensure that the amplified power line carrier communication signal can transmit information normally.

[0044] Furthermore, the power line carrier communication device provided by the present invention comprises the signal output circuit of any one of the above technical solutions. Therefore, the power line carrier communication device has all the beneficial effects of the above signal output circuit, which will not be described in detail here.

[0045] The third aspect of the utility model provides a photovoltaic power generation system, comprising: photovoltaic power generation equipment; a power line carrier communication device as in any one of the above technical solutions, wherein the output end of the power line carrier communication device is connected to the output cable of the photovoltaic power generation equipment.

[0046] The photovoltaic power generation system provided by the utility model includes photovoltaic power generation equipment, which can convert light energy into electrical energy, thereby realizing the function of power generation, and further transmit the electrical energy to the required equipment through the output cable. At the same time, by connecting the output end of the power line carrier communication equipment to the output cable of the photovoltaic power generation equipment, the amplified power line carrier communication signal is transmitted through the output cable of the photovoltaic power generation equipment to realize the process of power line carrier communication.

[0047] Furthermore, the photovoltaic power generation system provided by the utility model includes the power line carrier communication device of any one of the above technical solutions. Therefore, the photovoltaic power generation system has all the beneficial effects of the above power line carrier communication device, which will not be repeated here.

[0048] Additional aspects and advantages of the present invention will become apparent in the following description or will be understood through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0050] Figure 1 A circuit diagram of a signal output circuit provided by an embodiment of the utility model is shown;

[0051] Figure 2 Shows Figure 1 Circuit diagram of the amplifier circuit;

[0052] Figure 3 A schematic diagram showing the structure of a power line carrier communication device provided by an embodiment of the utility model is shown;

[0053] Figure 4 The structure block diagram of the photovoltaic power generation system provided by the embodiment of the utility model is shown;

[0054] Figure 5 A circuit diagram of a power line carrier communication circuit in the related art is shown.

[0055] in, Figures 1 to 4 The corresponding relationship between the reference numerals and the component names is as follows:

[0056] 100 signal output circuit, 102 amplifier circuit, 104 signal input terminal, 106 signal output terminal, 108 power supply terminal, 112 resonant circuit, 114 input unit, 116 amplifier unit, 118 signal transmission unit, 120 detection unit, 122 switch element, 124 pull-down resistor, 126 undervoltage lockout element, 128 AND gate circuit, 130 first signal output terminal, 132 second signal output terminal, 134 first resistor, 136 first inductor, 138 first capacitor, 140 ground terminal, 200 power line carrier communication equipment, 202 power line carrier communication chip, 300 photovoltaic power generation system, 302 photovoltaic power generation equipment. DETAILED DESCRIPTION

[0057] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0058] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0059] Refer to the following Figures 1 to 4 The signal output circuit, power line carrier communication device and photovoltaic power generation system provided according to some embodiments of the present invention are described.

[0060] The utility model provides a signal output circuit 100, such as Figure 1 As shown, the signal output circuit 100 is used to output a power line carrier communication signal, and the signal output circuit 100 includes: an amplifier circuit 102, the amplifier circuit 102 includes a signal input terminal 104, a signal output terminal 106 and a power supply terminal 108, the signal input terminal 104 is used to receive a first signal, the power supply terminal 108 is connected to a first power supply, and the signal output terminal 106 is used to output a second signal; wherein the amplifier circuit 102 is used to amplify the voltage value corresponding to the high-level signal in the first signal to the rated voltage of the first power supply to generate a second signal, the first signal is a power line carrier communication signal, and the second signal is an amplified power line carrier communication signal; a resonant circuit 112, the resonant circuit 112 is connected to the signal output terminal 106, and is used to convert the second signal into an analog signal.

[0061] The signal output circuit 100 provided by the utility model can be used to output a power line carrier communication signal. Specifically, the signal output circuit 100 includes an amplifier circuit 102. The amplifier circuit 102 is used to amplify the power of the power line carrier communication signal, thereby ensuring that the power line carrier communication signal has sufficient power to transmit information.

[0062] Specifically, the amplifier circuit 102 includes a signal input terminal 104 (IN), a signal output terminal 106 (OUT) and a power supply terminal 108 (VDD), wherein the signal input terminal 104 is used to receive a first signal, and the signal output terminal 106 is used to output a second signal, the first signal is the power line carrier communication signal before amplification, and the second signal is the power line carrier communication signal after amplification. Further, the power supply terminal 108 of the amplifier circuit 102 is connected to the first power supply, and through the amplifier circuit 102, the voltage value corresponding to the high-level signal in the received first signal can be amplified to the rated voltage value of the power supply circuit to generate the second signal, thereby realizing the power amplification of the power line carrier communication signal. Further, the amplifier circuit 102 also includes a ground terminal 140 (GND), and the ground terminal 140 is used for grounding.

[0063] By setting the amplifier circuit 102, the voltage value of the high-level signal in the power line carrier communication signal can be amplified to the rated voltage value of the first power supply connected to the amplifier circuit 102, which can effectively reduce the cost of the signal output circuit 100 compared to using a dedicated power amplifier chip. That is, in the process of amplifying the power line carrier communication signal, the power of the amplified power line carrier communication signal can be controlled by setting the rated voltage value of the first power supply. In addition, a current limiting resistor can be set between the amplifier circuit 102 and the first power supply to set the voltage value of the high-level signal in the power line carrier communication signal, thereby controlling the power of the amplified power line carrier communication signal.

[0064] Furthermore, the signal output circuit 100 further includes a resonant circuit 112, which is connected to the signal output terminal 106 of the amplifier circuit 102. The second signal outputted by the signal output terminal 106 of the amplifier circuit 102 can be converted into an analog signal through the resonant circuit 112. Moreover, the power of the second signal can be further adjusted through the resonant circuit 112 to ensure the transmission of the second signal, and at the same time, the harmonic component of the second signal can be reduced, thereby improving the electromagnetic compatibility problem of the signal output circuit and ensuring the stable operation of the signal output circuit.

[0065] Specifically, the waveform of the power line carrier communication signal before amplification is usually a digital signal. The digital signal can be converted into an analog signal through the resonance circuit 112, so that the second signal can be transmitted through the power line.

[0066] The signal output circuit 100 provided by the utility model can amplify the voltage value corresponding to the high-level signal in the input power line carrier communication signal before amplification by setting the amplifier circuit 102, so as to amplify the power of the power line carrier communication signal, and further convert the amplified power line carrier communication signal into an analog signal through the resonance circuit 112, thereby ensuring that the amplified power line carrier communication signal can transmit information normally. Compared with using a dedicated power amplifier chip, the cost of the signal output circuit 100 can be effectively reduced.

[0067] In some embodiments, optionally, Figure 2 As shown, the amplifier circuit 102 includes: an input unit 114, the input end of the input unit 114 is used to receive a first signal; an amplifier unit 116, the first input end of the amplifier unit 116 is connected to the output end of the input unit 114, the second input end of the amplifier unit 116 is connected to the first power supply, and the output end of the amplifier unit 116 is connected to the signal output end 106; wherein the amplifier unit 116 is used to amplify the voltage value corresponding to the high-level signal in the first signal to the rated voltage to generate a second signal.

[0068] In this embodiment, the amplifier circuit 102 includes an input unit 114. By setting the input unit 114, the first signal can be received to ensure that the first signal, that is, the power line carrier communication signal before amplification, can be stably received during the operation of the signal output circuit 100.

[0069] Furthermore, the amplifier circuit 102 further includes an amplifier unit 116, a first input end of the amplifier unit 116 is connected to the output end of the input unit 114, and in the process of the input unit 114 receiving the first signal, the first signal can be transmitted to the amplifier circuit 102 for amplification. The second input end of the amplifier circuit 102 is connected to the first power supply, and after the amplifier circuit 102 receives the first signal, the voltage value of the high-level signal in the first signal can be amplified to the rated voltage, that is, to the rated voltage value of the first power supply, to generate a second signal, thereby amplifying the power of the power line carrier communication signal.

[0070] By setting the input unit 114 and the amplifying unit 116, stable reception of the first signal can be achieved, and the voltage value corresponding to the high-level signal in the first signal can be amplified to the rated voltage value of the first power supply. Compared with using a dedicated power amplifier chip, the cost of the signal output circuit 100 can be effectively reduced.

[0071] In some embodiments, optionally, Figure 2As shown, the input unit 114 includes: a signal transmission unit 118, the input end of the signal transmission unit 118 is used to receive a first signal, and the signal transmission unit 118 is used to transmit the first signal; a detection unit 120, the first input end of the detection unit 120 is connected to the first power supply, the second input end of the detection unit 120 is connected to the output end of the signal transmission unit 118, and the output end of the detection unit 120 is connected to the first input end of the amplification unit 116; wherein the detection unit 120 is used to transmit the first signal output by the signal transmission unit 118 to the amplification unit 116 when the actual voltage value of the first power supply is the rated voltage.

[0072] In this embodiment, the input unit 114 includes a signal transmission unit 118 and a detection unit 120, wherein the signal transmission unit 118 is used to transmit a first signal, specifically, the input end of the signal transmission unit 118 is used to receive the first signal to achieve transmission of the first signal.

[0073] Further, the first input end of the detection unit 120 is connected to the first power supply, the second input end of the detection unit 120 is connected to the output end of the signal transmission unit 118, and the output end of the detection unit 120 is connected to the first input end of the amplification unit 116. By setting the detection unit 120, it is possible to detect the actual voltage value output by the first power supply, and specifically, whether the actual voltage value of the first power supply reaches the rated voltage value of the first power supply can be detected. In the case where the actual voltage value output by the first power supply reaches the rated voltage value, the first signal transmitted by the signal transmission unit 118 can be transmitted to the amplification unit 116 for amplification. On the contrary, in the case where the actual voltage value output by the first power supply is less than the rated voltage value of the first power supply, the first signal transmitted by the signal transmission unit 118 cannot be transmitted to the amplification unit 116, thereby preventing the voltage value corresponding to the high-level signal in the first signal from being unable to be amplified to the rated voltage value of the first power supply, thereby preventing the power of the generated second signal from being unable to reach the set power.

[0074] By setting up the detection unit 120, it is possible to detect the actual voltage value output by the first power supply, thereby preventing the first signal from being transmitted to the amplification unit 116 for amplification when the actual voltage value output by the first power supply does not reach the rated voltage value of the first power supply, thereby preventing the power of the generated second signal from failing to reach the set power.

[0075] In some embodiments, optionally, Figure 2 As shown, the signal transmission unit 118 includes: a switch element 122, the input end of the switch element 122 is used to receive the first signal, and the output end of the switch element 122 is connected to the second input end of the detection unit 120; a pull-down resistor 124, one end of the pull-down resistor 124 is connected to the input end of the switch element 122, and the other end of the pull-down resistor 124 is grounded.

[0076] In this embodiment, the signal transmission unit 118 includes a switch element 122, and the input end of the switch element 122 is used to receive the first signal. Specifically, when the first signal is in a high level state, the switch element 122 is in a conducting state, so that the output end of the switch element 122 outputs a high level signal. On the contrary, when the first signal is in a low level state, the switch element 122 is in a cut-off state, so that the output end of the switch element 122 outputs a low level signal. That is, the level state of the signal output by the output end of the switch element 122 is the same as the level state of the first signal, thereby realizing the transmission of the first signal.

[0077] Furthermore, the signal transmission unit 118 further includes a pull-down resistor 124, one end of which is connected to the input end of the switch element 122, and the other end of which is grounded. By providing the pull-down resistor 124, when the input end of the switch element 122 does not receive the first signal, the signal state of the input end of the switch element 122 can be pulled down to a low level state by the pull-down resistor 124, thereby preventing the signal state of the input end of the switch element 122 from being disturbed by other electrical signals and changing, that is, preventing the switch element 122 from outputting an erroneous signal when the first signal is not received.

[0078] In some embodiments, optionally, Figure 2 As shown, the detection unit 120 includes: an undervoltage locking element 126, the input end of the undervoltage locking element 126 is connected to the first power supply; an AND gate circuit 128, the first input end of the AND gate circuit 128 is connected to the output end of the undervoltage locking element 126, the second input end of the AND gate circuit 128 is connected to the output end of the signal transmission unit 118, and the output end of the AND gate circuit 128 is connected to the first input end of the amplification unit 116; wherein the undervoltage locking element 126 is used to output a low-level signal when the actual voltage value of the first power supply is less than the rated voltage, and output a high-level signal when the actual voltage value of the first power supply is equal to the rated voltage.

[0079] In this embodiment, the detection unit 120 may include an undervoltage locking element 126, the input end of which is connected to the first power supply, wherein when the actual voltage output by the first power supply is less than the rated voltage of the first power supply, the undervoltage locking element 126 outputs a low-level signal, and conversely, when the actual voltage value output by the first power supply is equal to the rated voltage value of the first power supply, the undervoltage locking element 126 outputs a high-level signal.

[0080] Furthermore, the detection unit 120 also includes an AND gate circuit 128, a first input end of the AND gate circuit 128 is connected to the output end of the undervoltage locking element 126, a second input end of the AND gate circuit 128 is connected to the output end of the signal transmission unit 118, and an output end of the AND gate circuit 128 is connected to the first input end of the amplification unit 116.

[0081] Specifically, when the actual voltage output by the first power supply is equal to the rated voltage of the first power supply, the output terminal of the undervoltage lockout element 126 outputs a high-level signal. At the same time, if the state of the first signal output by the output terminal of the signal transmission circuit is a high-level state, both input terminals of the AND gate circuit 128 input high-level signals, and the output terminal of the AND gate circuit 128 outputs a high-level signal. If the state of the first signal output by the output terminal of the signal transmission circuit is a low-level state, the first input terminal of the AND gate circuit 128 inputs a high-level signal, the second input terminal inputs a low-level signal, and the AND gate circuit 128 outputs a low-level signal. That is, when the actual voltage output by the first power supply is equal to the rated voltage of the first power supply, the first signal can be normally transmitted to the amplification unit 116 through the AND gate circuit 128.

[0082] On the contrary, when the actual voltage output by the first power supply is less than the rated voltage of the first power supply, the output end of the undervoltage lockout element 126 outputs a low-level signal. At this time, no matter whether the output end of the signal transmission circuit outputs a high-level signal or a low-level signal, the output end of the AND gate circuit 128 outputs a low-level signal. That is, when the actual voltage output by the first power supply is less than the rated voltage of the first power supply, the first signal cannot be normally transmitted to the amplification unit 116 through the AND gate circuit 128. The actual voltage value of the first power supply is detected, and the first signal is not transmitted to the amplification unit 116 for amplification when the actual voltage value output by the first power supply does not reach the rated voltage value of the first power supply, thereby avoiding the power of the generated second signal failing to reach the set power.

[0083] In some embodiments, optionally, Figure 1 As shown, the amplifying unit 116 includes: an operational amplifier, a first terminal of the operational amplifier is connected to the output terminal of the input unit 114 , a second terminal of the operational amplifier is connected to the first power supply, and an output terminal of the operational amplifier is connected to the signal output terminal 106 .

[0084] In this embodiment, the amplification unit 116 may include an operational amplifier, through which the voltage value corresponding to the high-level signal in the input first signal can be amplified to the rated voltage value of the first power supply connected to the operational amplifier, so as to amplify the power of the power line carrier communication signal.

[0085] By configuring the amplifying unit 116 as an operational amplifier, the cost of the signal output circuit 100 can be effectively reduced on the basis of amplifying the power of the power line carrier communication signal.

[0086] In some embodiments, optionally, Figure 1 As shown, the signal output terminal 106 includes a first signal output terminal 130 and a second signal output terminal 132 , the first signal output terminal 130 is connected to the output terminal of the amplifying unit 116 , and the second signal output terminal 132 is connected to the output terminal of the amplifying unit.

[0087] In this embodiment, the signal output terminal 106 of the amplifying circuit 102 may include a first signal output terminal 130 and a second signal output terminal 132, and the first signal output terminal 130 and the second signal output terminal 132 are both connected to the output terminal of the amplifying unit 116, that is, the first signal output terminal 130 and the second signal output terminal 132 are connected in parallel.

[0088] By setting the signal output terminal 106 of the amplifier circuit 102 as the first signal output terminal 130 and the second signal output terminal 132, and setting the first signal output terminal 130 and the second signal output terminal 132 to be connected in parallel, it is possible to simultaneously bear the voltage of the amplified power line carrier communication signal through the first signal output terminal 130 and the second signal output terminal 132, thereby avoiding damage to the signal output terminal 106 of the amplifier circuit 102 when the voltage of the amplified power line carrier communication signal is high, thereby ensuring the stable operation of the signal output circuit 100.

[0089] In some embodiments, the amplification circuit 102 optionally includes a single-channel low-side driver.

[0090] In this embodiment, the amplifier circuit 102 may include a single-channel low-side driver. By setting the amplifier circuit 102 as a single-channel low-side driver, the voltage value corresponding to the high-level signal in the first signal can be amplified to the rated voltage value of the first power supply connected to the single-channel low-side driver, thereby amplifying the power of the power line carrier communication signal. Compared with using a dedicated power amplifier chip, the cost of the signal output circuit 100 can be effectively reduced.

[0091] In some embodiments, optionally, Figure 1 As shown, the resonant circuit 112 includes: a first resistor 134 (R1), one end of the first resistor 134 is connected to the signal output terminal 106; a first inductor 136 (L1), one end of the first inductor 136 is connected to the other end of the first resistor 134; a first capacitor 138 (C1), one end of the first capacitor 138 is connected to the other end of the first inductor 136, and the other end of the first capacitor 138 is used to output a second signal.

[0092] In this embodiment, the resonant circuit 112 may include a first resistor 134, a first inductor 136 and a first capacitor 138. Through the first resistor 134, the first inductor 136 and the first capacitor 138, the second signal output by the amplifier circuit 102 can be converted to convert the second signal output by the signal output terminal 106 of the amplifier circuit 102 into an analog signal to ensure that the amplified power line carrier communication signal can transmit information normally.

[0093] In some embodiments, Figure 3 As shown, the utility model also provides a power line carrier communication device 200, including a signal output circuit 100 as in any one of the above embodiments; and a power line carrier communication chip 202 (PowerLine Communication, PLC chip), for generating a first signal, and the output end of the power line carrier communication chip 202 is connected to the signal input end 104.

[0094] The power line carrier communication device 200 provided by the present invention comprises the signal output circuit 100 of any one of the above embodiments. Therefore, the power line carrier communication device 200 has all the beneficial effects of the above signal output circuit 100, which will not be described in detail here.

[0095] The power line carrier communication device 200 provided by the utility model includes a power line carrier communication chip 202. The power line carrier communication chip 202 can generate a power line carrier communication signal, that is, a first signal, and then transmit the first signal to the signal output circuit 100. The signal output circuit 100 amplifies the power of the first signal to generate a second signal, and converts the second signal, and converts the second signal output by the signal output terminal 106 of the amplifier circuit 102 into an analog signal to ensure that the amplified power line carrier communication signal can transmit information normally.

[0096] Furthermore, the power line carrier communication device 200 provided by the present invention comprises the signal output circuit 100 of any one of the above technical solutions. Therefore, the power line carrier communication device 200 has all the beneficial effects of the above signal output circuit 100, which will not be described in detail here.

[0097] In some embodiments, Figure 4 As shown, the utility model also provides a photovoltaic power generation system 300, including: a photovoltaic power generation device 302; a power line carrier communication device 200 as in any of the above embodiments, wherein the output end of the power line carrier communication device 200 is connected to the output cable of the photovoltaic power generation device 302.

[0098] The photovoltaic power generation system 300 provided by the utility model includes a photovoltaic power generation device 302, which can convert light energy into electrical energy, thereby realizing the function of power generation, and further transmit the electrical energy to the required equipment through the output cable. At the same time, by connecting the output end of the power line carrier communication device 200 to the output cable of the photovoltaic power generation device 302, the amplified power line carrier communication signal is transmitted through the output cable of the photovoltaic power generation device 302, so as to realize the process of power line carrier communication.

[0099] Furthermore, the photovoltaic power generation system 300 provided by the utility model includes the power line carrier communication device 200 of any one of the above technical solutions. Therefore, the photovoltaic power generation system 300 has all the beneficial effects of the above power line carrier communication device 200, which will not be repeated here.

[0100] In the description of the present invention, the term "plurality" refers to two or more than two. Unless otherwise clearly defined, the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention. The terms "connection", "installation", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0101] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0102] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A signal output circuit for outputting a power line carrier communication signal, characterized in that: The signal output circuit comprises: an amplifier circuit, the amplifier circuit comprising a signal input terminal, a signal output terminal and a power supply terminal, the signal input terminal is used to receive a first signal, the power supply terminal is connected to a first power supply, and the signal output terminal is used to output a second signal; The amplifier circuit is used to amplify the voltage value corresponding to the high-level signal in the first signal to the rated voltage of the first power supply to generate the second signal, the first signal is the power line carrier communication signal, and the second signal is the amplified power line carrier communication signal; A resonant circuit is connected to the signal output terminal and is used to convert the second signal into an analog signal.

2. The signal output circuit according to claim 1, characterized in that: The amplifying circuit comprises: An input unit, wherein an input end of the input unit is used to receive a first signal; an amplifying unit, wherein a first input end of the amplifying unit is connected to an output end of the input unit, a second input end of the amplifying unit is connected to a first power supply, and an output end of the amplifying unit is connected to the signal output end; The amplifying unit is used to amplify the voltage value corresponding to the high-level signal in the first signal to the rated voltage to generate the second signal.

3. The signal output circuit according to claim 2, characterized in that: The input unit comprises: a signal transmission unit, wherein an input end of the signal transmission unit is used to receive the first signal, and the signal transmission unit is used to transmit the first signal; a detection unit, wherein a first input end of the detection unit is connected to the first power supply, a second input end of the detection unit is connected to an output end of the signal transmission unit, and an output end of the detection unit is connected to a first input end of the amplification unit; The detection unit is used for transmitting the first signal output by the signal transmission unit to the amplification unit when the actual voltage value of the first power supply is the rated voltage.

4. The signal output circuit according to claim 3, characterized in that: The signal transmission unit comprises: a switch element, wherein an input end of the switch element is used to receive the first signal, and an output end of the switch element is connected to a second input end of the detection unit; A pull-down resistor, one end of which is connected to the input end of the switch element, and the other end of which is grounded.

5. The signal output circuit according to claim 3, characterized in that: The detection unit comprises: an undervoltage lockout element, wherein an input terminal of the undervoltage lockout element is connected to the first power source; an AND gate circuit, wherein a first input terminal of the AND gate circuit is connected to an output terminal of the undervoltage lockout element, a second input terminal of the AND gate circuit is connected to an output terminal of the signal transmission unit, and an output terminal of the AND gate circuit is connected to a first input terminal of the amplification unit; The undervoltage locking element is used to output a low level signal when the actual voltage value of the first power supply is less than the rated voltage, and to output a high level signal when the actual voltage value of the first power supply is equal to the rated voltage.

6. The signal output circuit according to claim 2, characterized in that: The amplification unit comprises: An operational amplifier, wherein a first terminal of the operational amplifier is connected to the output terminal of the input unit, a second terminal of the operational amplifier is connected to the first power supply, and an output terminal of the operational amplifier is connected to the signal output terminal.

7. The signal output circuit according to claim 2, characterized in that: The signal output terminal includes a first signal output terminal and a second signal output terminal, the first signal output terminal is connected to the output terminal of the amplifying unit, and the second signal output terminal is connected to the output terminal of the amplifying unit.

8. The signal output circuit according to any one of claims 1 to 4, characterized in that: The amplification circuit includes a single-channel low-side driver.

9. The signal output circuit according to any one of claims 1 to 4, characterized in that: The resonant circuit comprises: a first resistor, one end of which is connected to the signal output end; a first inductor, one end of the first inductor being connected to the other end of the first resistor; A first capacitor, one end of the first capacitor is connected to the other end of the first inductor, and the other end of the first capacitor is used to output the second signal.

10. A power line carrier communication device, characterized in that: include: The signal output circuit according to any one of claims 1 to 9; as well as A power line carrier communication chip is used to generate the first signal, and the output end of the power line carrier communication chip is connected to the signal input end.

11. A photovoltaic power generation system, characterized in that: include: Photovoltaic power generation equipment; The power line carrier communication device according to claim 10, wherein the output end of the power line carrier communication device is connected to the output cable of the photovoltaic power generation device.

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