6results about How to "Reduce voltage stress" patented technology

The utility model discloses a kind of magnetic integrated type secondary side low-voltage side winding circuit, it includes primary side full bridge part, secondary side high-voltage side and secondary side low-voltage side, the secondary side low-voltage side is connected with M9NNMOS pipe, M10NNMOS pipe and M12NNMOS pipe in parallel, the secondary side low-voltage side is accessed primary side full bridge part after a plurality of first resistors and a plurality of capacitors are connected in parallel and then with M11NNMOS pipe series connection.In this application, when the NMOS pipe of secondary side high-voltage side opens, the secondary side low-voltage side M11NNMOS pipe is opened simultaneously to reduce winding floating voltage and reduce the voltage stress of M9 and M10 NMOS.

A three-level double-buck conversion circuit for a post-stage of an energy storage inverter integrated device, comprising an energy storage battery, a bidirectional DC-DC converter, switching tubes S1, S2, S3, S4, S5, S6, S7, diodes D1, D2, D3, D4, D5, D6, D7, inductors L1 and L2, and capacitors C1 and C2. The three-level double-buck conversion circuit comprises a bidirectional switching tube composed of switching tube S4, diodes D3, D4, D5, and D6, and a double-buck circuit structure composed of switching tubes S2 and S3, diodes D1 and D2, and inductors L1 and L2. The three-level double-buck conversion circuit of the present application organically integrates three-level technology and a double-buck circuit structure, and has the advantages of low switching tube voltage stress, high reliability, and high efficiency.

This utility model discloses a clamping absorption circuit and a DC power supply system. The clamping absorption circuit includes a boost switch K1, a buck switch K2, a first clamping absorption branch, and a second clamping absorption branch. The first clamping absorption branch includes a first diode D1, a first capacitor C1, and a first resistor R1. The first diode D1 and the first capacitor C1 are connected in series and then in parallel with the boost switch K1, forming a first node between the first diode D1 and the first capacitor C1. The first resistor R1 is connected between the first node and the positive bus. The second clamping absorption branch includes a second diode D2, a second capacitor C2, and a second resistor R2. The second diode D2 and the second capacitor C2 are connected in series and then in parallel with the buck switch K2, forming a second node between the second diode D2 and the second capacitor C2. The second resistor R2 is connected between the second node and the negative bus.

The application discloses a modular equalization circuit and a control method thereof. The modular equalization circuit comprises a power supply, a converter, a selection switch, a transformer, a rectifier circuit, a filter and a battery equalization circuit which are connected in sequence. The number of modules is N, the number of energy storage units in each module is M, and the number of the rectifier circuit, the transformer, the filter and the battery equalization circuit is N. The number of the selection switch is N+1. Two output ends of the converter are marked as A and B respectively, i represents the i-th module, when i is odd, the one end of the switch S i is connected with A, the other end of the switch S i is connected with the same name end of the primary side of the transformer T i . When i is even, the one end of the switch S i+1 is connected with B, the other end of the switch S i+1 is connected with the different name end of the primary side of the transformer T i . When i is even, the one end of the switch S i is connected with B, the other end of the switch S i+1 is connected with A. The application significantly shortens the equalization path, improves the equalization efficiency and has strong expansibility.

This application provides an inverter system control circuit, method, inverter system, and electronic device. The control circuit actively switches the operating topology to a three-phase three-wire system by turning off the neutral line switch under grid-connected or off-grid conditions with a balanced load. This allows the inverter to operate with higher DC bus voltage utilization. Under the premise of outputting the same level of AC voltage, the DC bus voltage value can be correspondingly reduced. This means that the upstream photovoltaic boost circuit or battery converter does not need to provide excessively high voltage, thereby reducing the voltage stress on power semiconductor devices, helping to improve overall system efficiency, reduce losses, and potentially reduce heat dissipation requirements. Simultaneously, since the neutral line is isolated, the operating pressure in this mode can be alleviated, or even eliminated in some cases, simplifying control and reducing losses in this part of the circuit.