Four-quadrant output switching power supply

Abstract

When the switching power supply needs to work in a first quadrant and a third quadrant, a field programmable gate array controls an input power supply and a high-speed digital-to-analog converter to be conducted, the input power supply provides driving voltage, the high-speed digital-to-analog converter outputs an analog electric signal, a PWM signal is generated through an oscillation generation circuit, and the PWM signal is output to the first quadrant and the third quadrant. The driving circuit outputs first-quadrant current and third-quadrant current by controlling the magnitude of the output voltage of the driving circuit; when the switching power supply needs to work at two or four image limits, the driving circuit is connected with the output load, the output load inputs energy to the driving circuit, the driving circuit inputs the energy to the power absorption circuit, the power absorption circuit absorbs the energy input by the output load, and therefore the four-quadrant output function is achieved.

Description

technical field [0001] The application relates to the field of electronic circuits, in particular to a four-quadrant output switching power supply. Background technique [0002] The source meter field must have the function of four-quadrant output. Most products on the market use circuits for four-quadrant output, most of which are four-quadrant output circuits composed of linear power supplies and Metal-Oxide-Semiconductor (MOS) tubes or triodes. [0003] Since the linear power supply requires a large and heavy transformer, and the size and weight of the filter capacitor required are quite large, the four-quadrant output circuit is large in size and consumes a lot of power, requiring strong external heat dissipation. [0004] It can be seen that providing a four-quadrant output power supply that does not require a linear power supply is a technical problem to be solved urgently by those skilled in the art. Contents of the invention [0005] The purpose of this applicati...

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Problems solved by technology

[0003] Since the linear power supply requires a large and heavy transformer, the size and weight of the filter capacitor required are also quite large, so the four-quadrant output circuit is large in size and consumes a lot of power, requiring a strong external cooling capacity

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