3results about How to "Lower average current" patented technology

The application provides a method for sending a data packet based on a Wi-Fi switch circuit. The Wi-Fi switch circuit comprises a power module, a switch module and an output module. The power module comprises a button cell and a front-stage capacitor. The switch module comprises a key switch. The output module comprises a Wi-Fi chip. The method for sending a data packet comprises the following steps: in response to pressing the key switch, the Wi-Fi switch circuit is instantaneously turned on, the Wi-Fi chip is triggered to enter an initialization state, it is determined whether the Wi-Fi chip has been bound to a receiving end device, the Wi-Fi chip sends a data packet, and the front-stage capacitor supplies power to the Wi-Fi chip when the Wi-Fi chip sends the data packet. After the Wi-Fi chip sends the data packet each time, the Wi-Fi chip enters a sleep state. During the sleep state, the button cell charges the front-stage capacitor, so that the front-stage capacitor stores electric energy. After a predetermined time length arrives, the Wi-Fi chip enters a working state again.

The utility model provides a starting auxiliary source circuit of a photovoltaic inverter, a power supply circuit and the photovoltaic inverter. The starting auxiliary source circuit of the photovoltaic inverter comprises a half-wave rectification unit, a full-wave rectification unit and a first one-way conduction unit. An alternating current input end of the full-wave rectification unit is connected with an alternating current source of the starting auxiliary source circuit through the half-wave rectification unit; the direct current output end of the full-wave rectification unit is connected with a direct current bus of the photovoltaic inverter through the first one-way conduction unit; the direct-current output end of the full-wave rectification unit outputs first power supply voltage to the direct-current bus, and the voltage of the direct-current bus serves as starting voltage of the photovoltaic inverter.

The invention relates to a drive control circuit and method for a steam turbine speed regulator. The drive control circuit comprises a direct-current power supply input unit and at least one drive branch. The direct-current power input unit comprises a live wire and a zero wire; the number of the driving branches is equal to that of the OPC electromagnetic valves, each driving branch comprises an intermediate relay K1 and a contactor KM1, one end of a coil of the intermediate relay K1 is electrically connected with the live wire, the other end of the coil of the intermediate relay K1 is electrically connected with the zero line, one end of a normally open contact of the intermediate relay K1 is electrically connected with the live wire, and the other end of the normally open contact of the intermediate relay K1 is electrically connected with the zero line. One end of a coil of the contactor KM1 is electrically connected with the other end of the normally open contact of the intermediate relay K1, and the other end of the coil of the contactor KM1 is electrically connected with the zero line. The contactor is driven by the intermediate relay, the intermediate relay K1 serves as a control stage, the coil power consumption is small, direct and safe driving can be achieved through a passive dry contact signal of a steam turbine speed regulator, and the problem that a large-current load impacts a precision controller is solved.