2results about How to "Small current ripple" patented technology

The invention relates to the technical field of power electronic direct-current converters, in particular to an input and output common-ground high-gain boost converter which comprises a direct-current voltage source Vin, diode components D0-D4, capacitor components C0-C4, a first coupling inductor L1, a second coupling inductor L2, a first mosfet tube S1, a second mosfet tube S2 and a resistor R. The two main loops operate in a staggered mode, so that input current is continuous, input current ripples are small, relatively stable energy is continuously provided for the circuit, the voltage multiplication unit is adopted, the amplification factor of the circuit is increased, the duty ratio of the mosfet tubes S1 and S2 is adjusted, and small current ripples can be kept even under the condition that the boost factor is large. The device has the advantages of high step-up ratio, low device stress, high efficiency, easiness in control and implementation, lower cost and the like, and is suitable for a new energy power generation scene needing high direct current bus voltage grid-connected output under a low input voltage condition.

The application belongs to the technical field of inverters, and discloses a low-ripple soft-switching boost inverter and application thereof. The low-ripple soft-switching boost inverter is obtained by multiplexing the upper tube of a traditional two-phase buck / boost converter and the lower tube of a full-bridge inverter and adding an auxiliary inductor. The inverter can realize soft switching, has high conversion efficiency, low current ripple and low input inductor current stress. In addition, the input current ripple frequency is increased to twice the switching frequency, the size of the required filter device is reduced, and the system cost is reduced.