Power supply unit, power supply device and power supply system

Abstract

The invention provides a power supply unit, a power supply device and a power supply system, wherein the power supply unit is a first power supply unit in the power supply device, and the first power supply unit is used for obtaining an actual output voltage of each power supply unit in the power supply device when a load demand current value is higher than an output current limit value of the first power supply unit; determining an output voltage average value according to the actual output voltages of the power supply units; and sending the output voltage average value to each second power supply unit, wherein the output voltage average value is used for each second power supply unit to execute the following operations: determining an output voltage setting value of the second power supply units according to the output voltage average value, wherein the output voltage setting values determined by the second power supply units according to the output voltage average value are the same. The power supply unit provided by the invention is applied to the power supply device with serially connected outputs, so that the balance of output power of different power supply units in the power supply device is favorably maintained, the service life of all the power supply units and the whole power supply device is prolonged, and the reliability of the power supply device is improved.

Description

technical field [0001] The invention belongs to the field of power supply technology, and in particular relates to a power supply unit, a power supply device and a power supply system. Background technique [0002] With the development of the energy industry, the user's demand for the output voltage range of the power supply is becoming wider and wider. When the output voltage demand exceeds 2000V, it is difficult for conventional semiconductor components to meet the voltage stress requirements, and device-level series connection is required. Device-level It is difficult to design in series, so at present, the output of the power supply is usually connected in series to increase the output voltage range of the power supply. In a multi-power supply output series system, when the actual load demand is greater than the output current limit of some power supplies in the system, the whole system will have the problem of unbalanced output power among different power supplies. If t...

AI Technical Summary

Problems solved by technology

In a multi-power supply output series system, when the actual load demand is greater than the output current limit of some power supplies in the system, the whole system will have the problem of unbalanced output power among different power supplies. If the whole system is in a state of unbalanced output power for a long time, will lead to a shortened service life of the entire system

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