Power supplier with medium voltage direct current

Abstract

A medium voltage DC power supply device used to provide the medium and low DC voltage comprises: a power input unit, a rectify unit, and a conversion unit. After the power input unit makes the voltage input to the rectify unit, the rectify unit rectifies it and outputs a medium DC voltage. After the other part of the medium DC voltage is processed through the conversion unit, the whole DC power supply can not only provide low voltage power supply, but also have direct medium voltage supply, it makes the power supply for information home appliance more flexible and efficiency.

Description

technical field [0001] The present invention relates to a power supply device with medium-voltage direct current, in particular to a power supply device that can provide not only low-voltage power supply but also medium-voltage power supply, so that the entire power supply device can save power consumption of household appliances and improve efficiency. Background technique [0002] General PC power supplies mainly provide multiple sets of low-voltage DC. However, in the era of PC information appliances, low-voltage DC supplies that continue to use PC architecture will lose their efficiency and flexibility. [0003] In addition to various electronic circuit designs inside the popular information home appliances such as plasma TVs and liquid crystal displays, the only power supply device for information home appliances is a low-voltage power supply, such as figure 1 As shown, the lamps used in the backlight of the liquid crystal display are all cold-cathode fluorescent lamps ...

AI Technical Summary

Problems solved by technology

[0004] In the traditional design, the energy of large wattage is obtained from the 12V (5V) low-voltage end of the conversion unit (the number of lamp tubes used in large-scale LCD displays is many, up to 20-30), so hundreds of watts of low-voltage are required However, these power supply terminals obtained from the low-voltage power supply module have to go through the low-efficiency medium-voltage (DC 150-300V) to low-voltage DC-to-DC conversion unit, and then the inverter composed of inverters. The processed high voltage can drive the lamp tube to light the backlight panel of the liquid crystal display

As a result, the power supply device of the information home appliance consumes a lot of power, and the performance cannot be improved at the same time.

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