High-gain zero-ripple passive clamping type Boost converter and control method thereof

Abstract

The invention discloses a high-gain zero-ripple passive clamping type Boost converter and a control method thereof, and belongs to the technical field of power electronic converters. One end of Lin is connected with the positive electrode of a power supply Vin, and the other end is connected with one end of L1, the drain electrode of S2 and one end of C1; the other end of C1 is connected with the cathode of D1, one end of C0 and one end of a load resistor; the source electrode of S2 is connected with one end of L2 and one end of C3; the other end of L1 is connected with the drain electrode of S1, the anode of D1 and one end of C2; the other end of C2 is connected with the anode of D2 and the cathode of D4; the other end of the C3 is connected with the cathode of D2 and the anode of D3; the cathode of the power supply Vin is connected with the source electrode of the S1, the other end of the L2, the cathode of the diode D3 and one end of the C4; the other end of the C4 is connected with the anode of the diode D4, the other end of the C0 and the other end of the load resistor. On the basis of a traditional switch inductance converter, the converter overcomes the defects of large input current ripple and low voltage gain, and due to the introduction of the passive clamping circuit, the common problem of switch tube voltage resonance in a traditional switch inductance structure is suppressed.

Description

technical field [0001] The invention relates to the technical field of power electronic converters, in particular to a high-gain zero-ripple passive clamping boost converter and a control method thereof. Background technique [0002] As global energy and environmental issues continue to emerge, new energy power generation technologies represented by photovoltaics and fuel cells have attracted widespread attention due to their high efficiency, pollution-free, renewable and non-regional restrictions. However, in new energy power generation systems, the output voltage of photovoltaic panels and fuel cells is relatively low, generally around 20V-50V, which cannot directly provide power to the grid or local loads. In order to adapt the energy captured by fuel cells and solar photovoltaic panels to grid-connected power generation or supply power to local loads, a high-gain DC-DC converter is required to boost its lower output voltage to a higher DC voltage above 200V, Then throug...

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Problems solved by technology

[0008] Aiming at the problems of low step-up ratio and large input current ripple in traditional switched inductor Boost converters, the present invention provides a high-gain zero-ripple passive-clamped Boost converter and its control method; the present invention provides The converter has the characteristics of zero input current ripple, low voltage stress of switching devices and diodes, high output voltage gain, and the introduction of passive clamping structure can effectively suppress the problem of switching tube voltage resonance. It is suitable for high boost ratio and no need for electrical isolation. Applications

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