3results about How to "High boost ratio" patented technology

The invention discloses a mirror image high-gain Boost converter with switch tubes synchronously switched on and switched off, and belongs to the technical field of power electronic direct current conversion. The converter comprises a direct-current voltage source, two inductors, seven capacitors, seven diodes and two MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) switching tubes. The core innovation lies in that the two switching tubes are completely and synchronously switched on and switched off, no dead time needs to be set, and the control logic is simplified. Through specific connection and multiplexing of a capacitor and an inductor, an efficient voltage-multiplying unit is formed, extremely high voltage gain is achieved, the gain formula is shown in the specification, and D is the duty ratio of a switching tube. According to the structure, high gain is obtained, meanwhile, the voltage stress of the switching tube is remarkably reduced, the value of the voltage stress is only output voltage, and the switching loss is effectively reduced. The device has the advantages of being small in number of devices, compact in structure, high in efficiency, low in cost and the like, and is particularly suitable for occasions where low input voltage needs to be boosted to high direct current bus voltage in the new energy field of photovoltaic systems, energy storage systems and the like.

This invention discloses a common-ground boost module, a Y-type inverter, and a control method, belonging to the field of power electronics technology. It includes: inductors L1 and L2, capacitors C1, C2, and C3, and switching transistors S1, S2, and S3. One end of inductor L1 is connected to the positive terminal of the input voltage, and the other end is connected to the drain of switching transistor S1. The source of S1 is connected to the negative terminal of the input voltage. The drain of S1 is also connected to the source of S2. The drain of S2 is connected to one end of capacitor C1, and the other end of capacitor C1 is connected to the negative terminal of the input voltage. One end of inductor L2 is connected to the drain of S2. The other end of inductor L2, one end of capacitor C2, and the source of S3 form a Y-type connection. The other end of capacitor C2 is connected to the drain of S1, and the drain of S3 is connected to one end of capacitor C3. The other end of capacitor C3 is connected to the negative terminal of the input voltage, and capacitor C3 is connected in parallel with the output side to achieve a common ground for input and output. Compared with traditional boost circuits, this invention can achieve a higher boost ratio.

The present invention belongs to the field of DC converters, and specifically relates to an isolated DC boost converter of a two-phase parallel boost circuit and a control method thereof, aiming to solve the problem that the existing isolated DC converter cannot adapt to a wide voltage range, high gain, and achieve high-efficiency conversion within the entire load range. The present invention includes: two-phase input inductors respectively form a two-phase parallel Boost boost circuit with two bridge arms of a full-bridge unit to boost and stabilize the input DC voltage; a DC bus capacitor performs voltage filtering after boosting and stabilizing; a series resonant circuit resonates and transmits power from the primary side to the secondary side through a high-frequency transformer; an output rectifier and filter circuit performs high-frequency rectification and filtering of the output voltage of the high-frequency transformer to obtain an output DC voltage. The present invention introduces high-frequency series resonance with leakage inductance to eliminate voltage spikes caused by leakage inductance, and realizes soft switching of switch tubes within a wide voltage range by combining high-frequency resonance with PWM modulation, thereby improving gain and efficiency while reducing losses.