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Power supply device and UPS

A power supply device and voltage technology, applied in circuit devices, emergency power supply arrangements, electrical components, etc., can solve the problems of input source pollution, large input current ripple, and input current imbalance.

Inactive Publication Date: 2021-01-15
ZHANGZHOU KEHUA TECH CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the embodiment of the present invention provides a power supply device and a UPS to solve the problem of unbalanced positive and negative half-cycle input currents in the prior art when the load of the bipolar power supply device is unbalanced, resulting in large input current ripples and affecting the input source. causing serious pollution

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Embodiment Construction

[0016] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0017] In order to illustrate the technical solutions of the present invention, specific examples are used below to illustrate.

[0018] refer to figure 1 , the embodiment of the present invention provides a power supply device, including: a first bipolar conversion module 11, a positive DC bus BUS+, a negative DC bus BUS-, a bidirectional converter 12 and a main control module 14;

[0019] The ...

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Abstract

The invention is suitable for the technical field of power electronics, and provides a power supply device and a UPS. The power supply device comprises a first bipolar conversion module, a positive DCbus, a negative DC bus, a bidirectional converter, and a main control module. A first end of the bidirectional converter is connected with the positive DC bus, and the second end is connected with the negative DC bus; and the main control module is used for enabling the bidirectional converter to realize electric energy transmission between the positive DC bus and the negative DC bus according tothe positive half-cycle active power of the load and the negative half-cycle active power of the load, and enabling the effective value of the positive half-cycle input current of the first bipolar conversion module to be the same as the effective value of the negative half-cycle input current. When the load is unbalanced, electric energy exchange between the positive DC bus and the negative DC bus can be realized through the bidirectional converter so that the positive half-cycle input current and the negative half-cycle input current of the first bipolar conversion module are balanced, input current ripples are reduced, harmonic pollution is reduced, and the performance of the UPS is improved.

Description

technical field [0001] The invention belongs to the technical field of power electronics, and in particular relates to a power supply device and a UPS. Background technique [0002] The bipolar power supply device is powered by a bipolar DC bus, and has been widely used in the field of power electronics due to its advantages of high efficiency, low loss, and good dynamic characteristics. [0003] In the prior art, when the load of the bipolar power supply device is unbalanced, the positive and negative half-cycle input currents of the pre-stage conversion module will be asymmetrical, resulting in large input current ripples and causing great pollution to the input source. Contents of the invention [0004] In view of this, the embodiment of the present invention provides a power supply device and a UPS to solve the problem that the positive and negative half cycle input current is unbalanced when the load of the bipolar power supply device in the prior art is unbalanced, r...

Claims

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Application Information

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IPC IPC(8): H02J9/06G05F1/12
CPCH02J9/06G05F1/12
Inventor 石学雷曾奕彰王俊平王志豪郑志宏
Owner ZHANGZHOU KEHUA TECH CO LTD
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