Multi-phase interleaved Boost convertor

Abstract

The invention provides a multi-phase interleaved Boost convertor. An output end of a generator is rectified through a rectifying circuit and is connected with input ends of Boost circuits and auxiliary power supply respectively, wherein the auxiliary power supply supplies working voltage to a sequence circuit and a control circuit; a signal output end of the sequence circuit is connected with a signal input end of the control circuit; the signal output end of the control circuit is connected with signal input ends of the Boost circuits; and the Boost circuits output voltage for use by load. By the scheme of carrying out voltage stabilization and current balancing on a plurality of Boost circuits by the plurality of interleaved Boost circuits and a voltage-stabilizing loop, the problems of high-power output and current balancing are solved; the current balancing effect is relatively good; a special current balancing circuit does not need to be designed; the input voltage range is wide; and relatively high power factor and efficiency can be obtained.

Description

technical field [0001] The invention relates to the technical field of power conversion, in particular to a multi-phase interleaved and parallel-connected Boost converter. Background technique [0002] In a power system composed of an alternator and a power converter, the power converter converts the three-phase AC voltage generated by the three-phase permanent magnet alternator, whose amplitude and frequency change with the engine speed, into a stable DC voltage for the load use. Different from the generator power system with excitation voltage regulation, the power converter here needs to perform full power conversion on the electric energy output by the generator. Due to the limitation of the aspect, it is sometimes difficult to achieve the required output power by using a single power supply. The usual solution is to use power supplies in parallel to expand the output power. There are two schemes for parallel connection of power supplies: one is parallel connection of ...

AI Technical Summary

Problems solved by technology

This scheme has two deficiencies. First, the circuit has only two phases, which makes it difficult to achieve a large output power. Second, because only one PWM circuit is used to generate two-phase PWM signals with a difference of 180°, each item Duty cycle D<0.5, so it is difficult to adapt to a wide range of input voltage

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