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ac-dc power converter and method for same

A technology for power converters and DC power supplies, which is applied in the directions of high-efficiency power electronic conversion, output power conversion devices, electrical components, etc., and can solve the problem that power converters are not suitable for relatively wide output voltage ranges.

Active Publication Date: 2021-01-15
深圳ABB电动交通科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, this power converter is not suitable for applications with a relatively wide output voltage range

Method used

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  • ac-dc power converter and method for same
  • ac-dc power converter and method for same
  • ac-dc power converter and method for same

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Embodiment Construction

[0014] figure 1 An AC-DC power converter according to an embodiment of the invention is shown. Such as figure 1 As shown, the AC-DC power converter 1 includes an AC-DC conversion circuit 10 , a plurality of DC-DC conversion circuits 11 and a controller 12 .

[0015] The AC-DC conversion circuit 10 is configured to receive a first AC power source FA and output a first DC power source FD generated from the first AC power source FA. The first AC power source FA may be supplied from an external AC power source at an AC voltage Vin. In this embodiment, the AC-DC conversion circuit 10 may be a single-phase or three-phase controllable rectifier with a first controllable power switch. For example, the AC-DC conversion circuit 10 may be a three-phase bridge rectifier, such as a thyristor, with a first controllable power switch S11, S12, S13, S14 for each of the six arms of the bridge. Its extinction angle can be adjusted by adjusting the control signal from the controller 12 . The...

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PUM

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Abstract

The present invention provides an AC-DC power converter and a method for operating the AC-DC power converter. The AC-DC power converter includes: an AC-DC conversion circuit having a first controllable power switch configured to receive a first AC power source and output a first DC power generated from the first AC power source; a plurality of DC-DC conversion circuits , each of the plurality of DC-DC conversion circuits having an intermediate conversion to a second AC power source, the plurality of DC-DC conversion circuits configured to receive the first DC power source and combine the second DC power source output, wherein, Each of the plurality of DC-DC conversion circuits includes a full-bridge DC-AC conversion circuit having a second controllable power switch, the DC side of which is coupled across the output of the AC-DC conversion circuit, and the AC side of which is a capacitive element inserted between the two ends; and a controller configured to: generate a first control signal for turning on and off a first controllable power switch of the AC-DC conversion circuit such that the DC voltage of the first DC power supply capable of regulation over a range of DC voltages; and generating a plurality of second control signals, each of which is used to switch on and off a plurality of DC-DCs in full-bridge mode and half-bridge mode The second controllable power switch of the corresponding full-bridge DC-AC conversion circuit of the conversion circuit makes a plurality of DC-DC conversion circuits present a multi-stage voltage gain; wherein: the DC voltage range of the AC-DC conversion circuit is set to cover Two successive stages of voltage gain increase the voltage.

Description

technical field [0001] The present invention relates to converting an AC power input to a DC power output using direct DC-DC power conversion, and more particularly to a direct DC-DC conversion arrangement for parallel operation. Background technique [0002] In many applications, power converters need to operate over a wide range of input or output voltages. There is a trade-off between input voltage range or output voltage range and conversion efficiency. Power converters operating over a wide input voltage range or output voltage range exhibit greater efficiency drops than their narrow range counterparts. For a given input voltage, most conventional power converters can only ensure high efficiency over a narrow output voltage range. This is because the design of the power converter is often referred to as a single point of operation or a narrowed region of operation. Consequently, losses and stresses across the converter and components will increase when the converter ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/219
CPCH02M7/219H02M1/0058H02M1/007H02M1/0077Y02B70/10
Inventor 袁权发马琳李天河
Owner 深圳ABB电动交通科技有限公司
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