Power supply unit and used current converter
A technology of power supply device and converter, which is applied in the direction of electric light source, lighting device, output power conversion device, etc. It can solve the problems of high component assembly cost, low power supply efficiency, and volume occupation, and avoid the temperature rise of parts, Effects of improving power efficiency and reducing volume
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[0016] Similar functional elements in the following description use the same number.
[0017] refer to figure 2 , which is a block diagram of a power supply device of the present invention. exist figure 2 Among them, the power supply device includes: a rectifier / filter 21 , a direct current (DC-DC) converter 22 and a direct current (DC-AC) converter 23 . Such as figure 2 As shown, an input end of the rectifier / filter 21 is connected to an external AC power source for converting the input AC voltage (for example, the general room electricity is 90-132V (AC) or 180-264V (AC)) into DC Voltage output (for example, the voltage value of point M in the figure is 120-190V or 250-380V (DC)). The DC-to-DC converter 22 and the DC-to-AC converter 23 are different from a typical three-level power supply system, and are connected in parallel to the output end of the rectifier / filter so as to shorten the input AC voltage to the required output voltage between stages and increase its ...
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