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Multi-input power converter and control method thereof and uninterruptible power supply comprising multi-input power converter

A power converter, multi-input technology, applied in the output power conversion device, transportation and packaging, conversion of DC power input to DC power output, etc., can solve problems such as increasing the cost of electronic components

Active Publication Date: 2020-04-10
SANTAK ELECTRONICS SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sum of the power of the pulse width modulation rectifier circuit 23 and the bidirectional DC-DC converter 26 is twice the output power, thus increasing the cost of electronic components

Method used

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  • Multi-input power converter and control method thereof and uninterruptible power supply comprising multi-input power converter
  • Multi-input power converter and control method thereof and uninterruptible power supply comprising multi-input power converter
  • Multi-input power converter and control method thereof and uninterruptible power supply comprising multi-input power converter

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Embodiment Construction

[0074] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0075] In order to clearly show the circuit diagram of the multi-input power converter and its equivalent circuit of the present invention, the drawings of the present invention do not show the control device for controlling the multi-input power converter.

[0076] image 3 It is a circuit diagram of a multi-input power converter connected with a three-phase alternating current and a rechargeable battery according to the first embodiment of the present invention. Such as image 3 As shown, the multi-input power converter 30 includes a first bridge arm 331, a second bridge arm 332, a third bridge arm 333 and a fourth bridge arm 334 connected in parallel between the positive DC bus 391 and the negative DC bus 392; Assembly 381, which ...

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Abstract

The invention provides a multi-input power converter and a control method thereof and an uninterruptible power supply comprising the multi-input power converter. The multi-input power converter comprises: n bridge arms connected in parallel between a positive direct current bus and a negative direct current bus, and n is a positive integer not less than 3; a capacitor assembly connected between the positive direct current bus and the negative direct current bus; an alternating current switch assembly connected between the input ends of the first bridge arm to the (n-1)th bridge arm and an alternating current; and a direct-current switch assembly connected between the input ends of the second bridge arm to the nth bridge arm and the positive electrode of a rechargeable battery. According tothe multi-input power converter, bidirectional flow of energy can be realized, power soft switching is realized, and the cost is low.

Description

technical field [0001] The invention relates to a power converter, in particular to a multi-input power converter, a control method thereof and an uninterruptible power supply including the same. Background technique [0002] The uninterruptible power supply can continuously supply power to the load. When the mains voltage is normal, the mains supplies power to the load; when the mains voltage is abnormal or there is a power failure, the rechargeable battery supplies power to the load. Currently uninterruptible power supply has been widely used in various fields. [0003] figure 1 It is the circuit block diagram of the first uninterruptible power supply in the prior art. Such as figure 1 As shown, the uninterruptible power supply 1 includes a rectifier circuit 13, a power factor correction circuit (PFC) 14 and an inverter 15 sequentially connected between the AC input terminal 11 and the AC output terminal 12; and a charger 16 and a rechargeable battery 17 and switchgear...

Claims

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Application Information

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IPC IPC(8): H02M7/797H02M3/155H02J7/00H02J7/02H02J9/06
CPCH02M7/797H02M3/155H02J9/062H02M1/0083H02J9/063H02M7/219
Inventor 曹磊
Owner SANTAK ELECTRONICS SHENZHEN