Abstract: A power converter including a drive circuit connected to a power conversion circuit. The drive circuit is configured to: amplify a control signal from the controller, drive a switching tube in the power conversion circuit to be turned on or off, to implement power conversion of the power conversion circuit. The controller is configured to: in response to a voltage of the power conversion circuit being greater than or equal to a first threshold, control the drive circuit to be in a first amplification mode; or the controller is configured to: in response to a voltage of the power conversion circuit being less than a first threshold, control the drive circuit to be in a second amplification mode. An equivalent drive resistance of the drive circuit corresponding to the first amplification mode is greater than an equivalent drive resistance of the drive circuit corresponding to the second amplification mode.

Abstract: A method, an apparatus, a device, a storage medium and a program product for displaying search results are provided. The method includes: acquiring a search instruction inputted by a user at a search page, wherein the search instruction carries a keyword; obtaining search results by searching based on the keyword, wherein the search results comprise at least one target application and a sub-application in the target application; and displaying the search results at the search page. An application and/or a sub-application in the application that a user wants to use is obtained by searching an inputted keyword and is displayed at the search page. This enables the user to quickly find a target application or a target sub-application from hundreds of applications.

Abstract: Disclosed are a presenting method and apparatus, and an electronic device. The method includes: based on a search instruction for a message record, acquiring target message information, where the search instruction instructs the searching for a target message matching a target search term from the message record; and presenting the target message information in a sub-region of a first interface; where the first interface is provided with a switching control configured to switch an unfolded state and a folded state of at least one sub-region, target message information presented in each sub-region belongs to the same message source, target message information presented in different sub-regions belongs to different message sources, and a region area of the sub-region in the folded state is less than a region area of the sub-region in the unfolded state.

Abstract: A photovoltaic converter and a photovoltaic generation system. The photovoltaic converter is configured to electrically connect to a first photovoltaic module and a second photovoltaic module, where the first photovoltaic module includes a first positive electrode output end and a first negative electrode output end, and the second photovoltaic module includes a second positive electrode output end and a second negative electrode output end. The photovoltaic converter includes a current transformer and a power conversion circuit. The current transformer includes a magnetic structure, a first positive primary side winding, a second positive primary side winding, a negative primary side winding, and a first secondary side winding. The three primary side windings all pass through the magnetic structure and are spaced from each other. The first secondary side winding is wound around the magnetic structure. This reduces an occupied board area.

Abstract: This application describes examples of a grid-tied inverter apparatus and a grid-tied control method. In one example, the grid-tied inverter apparatus includes an inverter circuit, a controller, and a filter circuit. The controller is configured to adjust switching frequencies of a plurality of power switching transistors based on an output current value of the inverter apparatus, to adjust a resonance frequency of the filter circuit through different resonant branches, so that the resonance frequency meets a grid-tied requirement.

Abstract: This application describes examples of a grid-tied inverter apparatus and a grid-tied control method. In one example, the grid-tied inverter apparatus includes an inverter circuit, a controller, and a filter circuit. The controller is configured to adjust switching frequencies of a plurality of power switching transistors based on an output current value of the inverter apparatus, to adjust a resonance frequency of the filter circuit through different resonant branches, so that the resonance frequency meets a grid-tied requirement.