Novel quadratic converter

Abstract

According to the novel secondary converter, the positive electrode of a direct-current power source is connected with the positive electrode of a first capacitor and the first end of a first switching tube, and the second end of the first switching tube is connected with the first end of a first inductor and the negative electrode of a first diode; the second end of the first inductor is connected with the negative electrode of the direct-current power source, the negative electrode of the first capacitor is connected with the positive electrode of the first diode and the first end of the second switching tube, and the second end of the second switching tube is connected with the first end of the second inductor and the positive electrode of the second diode. The negative electrode of the second diode is connected with the positive electrode of the second capacitor and the first end of the load resistor, and the second end of the second inductor, the negative electrode of the second capacitor and the second end of the load resistor are connected with the negative electrode of the direct-current power supply, so that the current continuity of the input port is ensured, and meanwhile, the number of used components and power loss are reduced.

Description

technical field [0001] The invention belongs to the technical field of converters, and in particular relates to a novel secondary converter. Background technique [0002] DC switching converters are widely used in electric power, communication systems, renewable energy systems, home appliances, industrial equipment, railways and aviation and many other fields. Common DC converters include boost converters, buck converters and buck-boost converters. device. [0003] Buck-boost converters have been focused on and applied because of their high buck-boost capabilities. The buck-boost converters in the prior art include quadratic buck-boost converters with positive output voltage and single-switch secondary Buck-boost converters, quadratic buck-boost converters with positive output voltages usually have discontinuous input and output currents. Converters with discontinuous input currents are not suitable for renewable energy applications. Current stress and output voltage rippl...

AI Technical Summary

Problems solved by technology

[0003] The buck-boost converter has been focused on and applied because of its high buck-boost capability. The buck-boost converter in the prior art includes a secondary type buck-boost converter with a positive output voltage and a single-switch secondary Buck-boost converters, quadratic buck-boost converters with positive output voltage usually have discontinuous input and output currents, converters with discontinuous input currents are not suitable for renewable energy applications, discontinuous output currents will increase the output capacitor Current stress and output voltage ripple limit its scope of application. The single-switch secondary buck-boost converter uses a large number of components, especially the relatively high number of diodes, resulting in complex circuit topology and high power loss.

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