9results about "Systems using filtering and bypassing" patented technology

A device for managing photovoltaic modules according to one aspect includes: a communication unit for receiving a power line communication signal from at least one photovoltaic module array or transmitting the power line communication signal to the at least one photovoltaic module array; and a bypass unit forming a first communication path connecting the communication unit to the at least one photovoltaic module array, wherein the first communication path operates as an alternative path for a second communication path connecting the communication unit to the inverter.

The present invention provides an active inductive impedance enhancement circuit applied to a power line path. It utilizes a closed-loop control technique to detect residual high-frequency signals on the power line and generates a compensation current injected into the secondary side of the main inductor accordingly. The invention actively suppresses high-frequency current flowing through the main inductor, thereby significantly enhancing its impedance against high-frequency noise.

The technology provides for a power line communication system capable of providing data from a first device to a second device over a power line. The first device may include a set of contacts and a second device may include a second set of contacts. The second set of contacts may be adapted to electronically engage with the first set of contacts of the first device to form at least a power and ground lines connection. Circuitry within the first device and the second device may include circuitry for providing data over the power line connection between the first device and the second device. The circuitry may comprise a power line, a ground line, a transmitter line carrying data signals, a capacitor coupling the transmitter line to the power line at a connection point, and a receiver comprising two field effect transistors.

This application provides a signal transmission method and a related device. According to the signal transmission method, when two contact points on an electronic device are respectively in contact with two contact points on a keyboard, the electronic device may transmit a power signal and a GND signal to the keyboard through the contact points that are in contact with each other, that is, the electronic device may supply power to the keyboard. In addition, when a user presses a key on the keyboard to perform input, the keyboard may transmit key position information to the electronic device through a contact point that is in contact with the electronic device. In this signal transmission method, no Bluetooth chip needs to be built into the electronic device and the keyboard, reducing device costs.

According to one embodiment, an apparatus for managing solar modules includes a communication unit that receives a power line communication signal from at least one solar module array or transmits a power line communication signal to the at least one solar module array, and a bypass unit that forms a first communication path connecting the communication unit and the at least one solar module array, the first communication path operating as an alternative path to a second communication path connecting the communication unit and an inverter.

A power control system includes a device that receives power from an electric line of a distribution system via a distribution transformer, an acquisition unit that acquires electric line information on the electric line, and a control unit that causes the device to generate a current used for adjustment of apparent power in the electric line based on the electric line information acquired by the acquisition unit.

This application provides a signal transmission method and a related device. According to the signal transmission method, when two contact points on an electronic device are respectively in contact with two contact points on a keyboard, the electronic device may transmit a power signal and a GND signal to the keyboard through the contact points that are in contact with each other, that is, the electronic device may supply power to the keyboard. In addition, when a user presses a key on the keyboard to perform input, the keyboard may transmit key position information to the electronic device through a contact point that is in contact with the electronic device. In this signal transmission method, no Bluetooth chip needs to be built into the electronic device and the keyboard, reducing device costs. In addition, this signal transmission method is wired transmission, is more stable than a wireless transmission manner such as Bluetooth transmission, and uses fewer contact points. This reduces complexity of layout design of the contact points on the electronic device and the keyboard, and alleviates a dirty problem caused by exposure of the contact points.

The application relates to the field of power line communication, and discloses a power line communication system. The power line communication system can comprise a power conversion device, a signal isolation circuit, a signal adjustment circuit, a transformer and an operation circuit. The output end of the power conversion device is connected with a power line through the signal isolation circuit, the signal isolation circuit can be used for isolating an input signal of the power line to obtain a first noise signal of the power conversion device. The first input end of the signal adjustment circuit is connected with the output end of the power conversion device, the signal adjustment circuit can be used for inverting the phase of the first noise signal and outputting a second noise signal. The input end of the transformer is connected with the power line, the transformer can be used for filtering a power signal in the input signal of the power line to output a first signal. The operation circuit can be used for outputting a first communication signal according to the first signal and the second noise signal.

There are provided systems, devices and methods for detection and / or prevention of power line communications. In particular, there are provided systems, devices, and methods for preventing and / or detecting the possibility to communicate with an end unit via power line communication.