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A dual-level output power converter

A technology for output power and converters, which is applied in the field of buck-boost dual-level output power converters, can solve the problems of high cost and complicated converter structure, and achieve the effects of low cost, simple circuit structure and suppression of torque ripple

Active Publication Date: 2016-01-20
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a dual-level output power converter with simple structure and few components, which solves the problem of complex structure and high cost of parallel converters

Method used

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  • A dual-level output power converter
  • A dual-level output power converter
  • A dual-level output power converter

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Experimental program
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Embodiment Construction

[0025] The technical solution of the present invention will be described in detail below in conjunction with the drawings:

[0026] In this embodiment, the power switch S 1 , S 2 , S 3 Take the MOS tube as an example, and explain the technical scheme in detail:

[0027] A dual-level output power converter includes a DC power supply, a capacitor I, a capacitor II, a switch tube I, a switch tube II, a switch tube III, a diode I, a diode II, a diode III, and an inductor; wherein the DC power supply The anode is connected to the cathode of the capacitor II and the drain of the switch tube I; the anode of the capacitor II is connected to the cathode of the diode II and the drain of the switch tube III; the source of the switch tube is connected to the cathode of the diode III and the load input terminal; The source of the switch tube I is respectively connected to one end of the inductor and the cathode of the diode I; the other end of the inductor is respectively connected to the anode...

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Abstract

The invention discloses a bilevel output power converter which comprises a direct-current power source, a capacitor I, a capacitor II, a switching tube I, a switching tube II, a switching tube III, a diode I, a diode II, a diode III and an inductor. In a switching period, energy is stored in the inductor, the energy in the inductor is enabled to flow towards the two capacitors by controlling the switching tubes respectively, and the amount of the energy flowing towards the capacitors is controlled by controlling duty ratios of the switching tubes to realize voltage boosting and voltage reducing. Supply voltage on a load can be quickly changed by a selector switch. The bilevel output power converter is few in power device, simple in structure, capable of realizing voltage boosting and reducing, simple in switching between double output voltages and quite suitable for electric equipment needing instant changing of the supply voltage.

Description

Technical field [0001] The invention relates to a power converter, and more specifically, to a buck-boost dual-level output power converter. Background technique [0002] With the development of power electronics technology, power converters have been used in more and more applications, such as automation control, industrial manufacturing, and household appliances. In some special occasions, such as brushless DC motor commutation, in order to reduce the commutation torque ripple, the power supply voltage needs to be adjusted, but the commutation time of the brushless DC motor is very short, and the power supply voltage needs to be adjusted in a short time In order to improve the response speed of current and speed when the motor load changes suddenly, the adjustment of the power supply voltage also needs to be completed in a short time. [0003] Some loads need pulse voltage power supply, that is, there is a process of constant switching between high and low voltages. This type of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/10
Inventor 盛田田王晓琳
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS