Current-sharing control method for parallel redundant power supply

A redundant power supply and flow control technology, applied in the electrical field, can solve problems such as poor circuit stability and complex circuits, and achieve the effect of adapting to changes in load size

CN103683479AInactive Publication Date: 2014-03-26DALIAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2014-03-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a current-sharing control method for a parallel redundant power supply. The current-sharing control method includes the steps: respectively connecting a current-sharing bus with a main module and a backup module of the power supply, and respectively comparing detection current outputted by the bus and the main module and the backup module of the power supply by a current-sharing controller when voltage at two ends of a resistor has voltage difference to obtain the voltage Uc of the current-sharing controller; comparing the voltage Uc of the current-sharing controller with reference voltage Ur to obtain output voltage Ur', comparing and amplifying the output voltage Ur' and feedback voltage Uf to obtain feedback voltage Ue, and adjusting and controlling the voltage of the main module and the backup module of the power supply by the aid of the feedback voltage Ue to realize current-sharing control for main circuit current. The shortcomings of complicated circuit and poor circuit stability of two previous current-sharing techniques are overcome, the intensity of output current of a power supply module is kept unchanged, and the current-sharing control method can effectively adapt to load change.
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Description

technical field

[0001] The invention relates to the field of electricity, in particular to a current sharing control method for parallel redundant power supplies. Background technique

[0002] At present, high-efficiency, high-reliability and compact power supply has always been the goal pursued by people. It is undoubtedly a better design choice to use an integrated switching power supply module to achieve voltage stabilization and increase power through parallel power supply, and it can take into account the power supply. redundancy. Because the power supply modules work independently of each other, if any of them fails, the power supply will not be interrupted immediately, and the backup module can quickly switch to the power supply under control and resume normal use. The circuit design needs to use the current sharing technology, combined with the redundant structure to achieve fault tolerance.

[0003] At present, the mainstream parallel power supply methods on the m...

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Embodiment Construction

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the drawings in the embodiments of the present invention:

[0020] For some systems that require long-term uninterrupted operation and high reliability, such as base station communication equipment, servers, etc., a highly reliable power supply is often required. Redundant power supply design is a key part of it and plays an important role in high availability systems. Redundant power supply generally configures more than 2 power supplies. When one power supply fails, other power supplies can be switched on immediately without interrupting the normal operation of the equipment.

[0021] The technical scheme of the present invention analyzes the impact of the number of redundant modules on the system, and finally studies t...