Parallel current-sharing power supply

Abstract

The utility model provides a parallel current-sharing power supply, which comprises a current sampling module, a power conversion module, a voltage sampling module, a current amplifying module, a PWM module, a voltage feedback module, an analog-digital conversion module, a current feedback module, a feedback compensation unit and a micro-processor unit, wherein the current sampling module and the power conversion module are connected between the input and the output of the power supply in series, and the voltage sampling module, the analog-digital conversion module and the micro-processor unit are connected between users in series; the current sampling module is also connected with the current amplifying module, the current feedback module, the feedback compensation unit, the PWM module and the power conversion module, and the voltage feedback module is connected between the feedback compensation unit and the output of the power supply in series; and the current amplifying module is also connected with the analog-digital conversion module, and the current feedback module is connected with a current-sharing bus.

Description

technical field [0001] The invention relates to the technical field of computer power supply design, in particular to a parallel current equalizing power supply. Background technique [0002] In the field of computer communication, the power of equipment is increasing. We often see that multiple power supplies are used in parallel to power the system in a single device. There are two reasons for this. One is that the power of a single power supply cannot meet the needs of the system, so multiple power supplies need to be connected in parallel for capacity expansion. The other is to carry out redundant design on the power system to improve reliability. To realize the parallel use of multiple power supplies, the power supply itself must support the current sharing function. The traditional power supply current sharing design is to sample the output current, and adjust the power supply output impedance according to the current change to achieve current sharing. However, in ...

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Problems solved by technology

[0004] In view of the above problems, the present invention proposes a power supply parallel current sharing technology. In a power supply with high power, low voltage and high current output, the output impedance of the power supply is adjusted by sampling the input current to achieve current sharing, which solves the difficulty of sampling large current at the output end. problems, and can monitor the input power of the power supply at the same time, users can understand the power consumption of the equipment in real time

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