Huawei technologies co., ltd. (20240136917). APPARATUS AND METHOD FOR LIMITING INRUSH CURRENT AND EXTENDING HOLD-UP TIME IN AN AC-DC POWER CONVERTION APPARATUS simplified abstract

APPARATUS AND METHOD FOR LIMITING INRUSH CURRENT AND EXTENDING HOLD-UP TIME IN AN AC-DC POWER CONVERTION APPARATUS

Organization Name

huawei technologies co., ltd.

Inventor(s)

Luyu Wang of Shenzhen (CN)

Shuyu Ou of Shenzhen (CN)

Chao Wu of Dongguan (CN)

Wenbo Sun of Dongguan (CN)

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APPARATUS AND METHOD FOR LIMITING INRUSH CURRENT AND EXTENDING HOLD-UP TIME IN AN AC-DC POWER CONVERTION APPARATUS - A simplified explanation of the abstract

This abstract first appeared for US patent application 20240136917 titled 'APPARATUS AND METHOD FOR LIMITING INRUSH CURRENT AND EXTENDING HOLD-UP TIME IN AN AC-DC POWER CONVERTION APPARATUS

Simplified Explanation

The patent application describes an AC-DC power converter with power factor correction and energy storage capabilities.

• The power factor correction stage receives grid power and produces DC bus power.
• The DC-DC converter stage receives the DC bus power and produces a DC output power.
• Energy storage is provided by a larger capacitance value first capacitor and a smaller capacitance value second capacitor coupled in series across the DC bus power.
• A switching device is coupled in parallel with the smaller second capacitor to control inrush current during start-up.
• During operation, the first capacitor provides energy storage for the DC bus power.
• When grid power is disconnected, the switching device is turned off to extend hold-up time by transferring energy from the first capacitor to the second capacitor.

Potential Applications

This technology can be applied in:

• Power supply systems
• Renewable energy systems
• Electric vehicles

Problems Solved

This technology solves issues related to:

• Power factor correction
• Energy storage
• Inrush current control

Benefits

The benefits of this technology include:

• Improved power efficiency
• Enhanced energy storage capabilities
• Increased system reliability

Potential Commercial Applications

This technology can be commercially applied in:

• Power electronics industry
• Renewable energy sector
• Electric vehicle charging infrastructure

Possible Prior Art

One possible prior art for this technology could be the use of energy storage capacitors in power converters for improved efficiency and reliability.

How does this technology compare to existing power factor correction methods?

This article does not provide a direct comparison with existing power factor correction methods.

What are the specific efficiency gains achieved with this energy storage system?

The article does not detail the specific efficiency gains achieved with this energy storage system.

Original Abstract Submitted

an ac-dc power converter has a power factor correction stage that receives grid power and produces dc bus power. a dc-dc converter stage receives the dc bus power and produces a dc output power. energy storage is provided by a larger capacitance value first capacitor and a smaller capacitance value second capacitor coupled in series across the dc bus power with a switching device coupled in parallel with the smaller second capacitor. during converter start-up, the switching device is turned off and inrush current is controlled by transferring energy from the second capacitor to the first capacitor. during operation the switching device is turned on and the first capacitor provides energy storage for the dc bus power. when grid power is disconnected, hold-up time is extended by turning the switching device off and transferring energy from the first capacitor to the second capacitor.