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Voltage converter and control method therefor and voltage conversion system

A voltage converter and voltage technology, applied in the circuit field, can solve problems such as energy loss and temperature rise, and achieve the effect of reducing circuit loss and improving energy conversion efficiency

Inactive Publication Date: 2017-05-17
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Energy is lost during this transfer, which is converted to heat and heats up the system

Method used

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  • Voltage converter and control method therefor and voltage conversion system
  • Voltage converter and control method therefor and voltage conversion system
  • Voltage converter and control method therefor and voltage conversion system

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Embodiment Construction

[0079] The technical solution in this application will be described below with reference to the accompanying drawings.

[0080] It should be understood that the embodiments of the present invention may be applied to DC to DC voltage conversion scenarios. Specifically, the embodiment of the present invention may be applied to a step-down converter, such as a BUCK circuit, and may also be applied to a boost converter, such as a Boost circuit, which is not limited in this embodiment of the present invention.

[0081] figure 1 A typical BUCK circuit 100 is shown, which can be used to provide the load R after step-down conversion of the input voltage. Such as figure 1 As shown, the BUCK circuit 100 includes: an input terminal I, a power transistor switch 110, a power transistor switch 110, an inductor 130, a capacitor 120, and output terminals O1 and O2, wherein the inductor 130 and the capacitor 120 form a filter circuit. Specifically, one end of the power tube switch 110 is co...

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Abstract

The invention discloses a voltage converter and a control method therefor and a voltage conversion system, and energy conversion efficiency of the voltage converter can be improved. The voltage converter comprises an energy storage circuit, wherein the energy storage circuit comprises a first switching element, a second switching element and a first energy storage element; the voltage converter also comprises a third switching element and a second energy storage element, wherein in a first time frame, the first switching element is in a conduction state, the second switching element and the third switching element are in an off state, and a voltage source coupled to the voltage converter charges the first energy storage element and the second energy storage element; in a second time frame after the first time frame, the first switching element is in an off state, and the second switching element and the third switching element are in a conduction state; and the first energy storage element and the second energy storage element discharges to a load which is coupled to the voltage converter.

Description

technical field [0001] The present application relates to the field of circuits, and more particularly, to a voltage converter, a control method thereof, and a voltage conversion system. Background technique [0002] Due to its high energy density, safety and reliability, lithium batteries have been widely used in mobile devices. As the technology of electric vehicles matures, lithium batteries are also widely used to provide driving energy for electric vehicles. While being widely used, the storable power of lithium batteries is also increasing with the development of science and technology. Subsequently, fast charging of large-capacity batteries has gradually become a necessity. [0003] In the battery charging system, the core part is generally composed of the BUCK circuit. The BUCK circuit is a DC-to-DC step-down conversion circuit. Its function is to transfer energy from the high-voltage power supply to the battery according to the voltage required by the battery. En...

Claims

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Application Information

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IPC IPC(8): H02M3/10H02M3/158H02J7/00
CPCH02M3/10H02M3/158H02M1/0048Y02B70/10H02M3/07H02M1/0095H02J7/00H02J2207/20H02M3/072
Inventor 宋俊王鹏飞
Owner HUAWEI TECH CO LTD
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