power supply system
A technology of power supply system and voltage, which is applied in the direction of control/regulation system, electrical components, and adjustment of electrical variables, etc., to achieve the best conversion efficiency
Active Publication Date: 2017-04-12
SPI ELECTRONICS
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Problems solved by technology
[0009] Please refer again figure 1 , the power factor adjustment stage circuit 92 of the existing power supply system 900 adopts the design of a step-up conversion circuit, and its output is supplied to the power stage circuit 93 and the PFC controller 920 as a fixed boost voltage, but in light There is still room for improvement in the conversion efficiency of the power supply system 900 when there are different load changes in load, medium load or heavy load
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[0055] Embodiments of the present invention will now be described with reference to the drawings, in which like reference numerals represent like elements.
[0056] Please refer to image 3 In a preferred embodiment of the present invention, a power supply system 100 has an input stage circuit 11, a pre-stage boost circuit 12, a power stage circuit 13 with a transformer 130, and a power stage circuit 13 electrically connected to the pre-stage boost circuit. Voltage circuit 12 and power factor controller 10 for power factor control. In addition, in order to have good conversion efficiency for different loads, the power supply system 100 of the present invention further includes a voltage regulation device 2 , a load detection circuit 15 and a feedback stage circuit 14 . The working principle of each component is introduced as follows:
[0057] The input stage circuit 11 has an electromagnetic interference filter and a bridge rectifier module for rectifying an AC voltage VAC i...
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The present invention discloses a power supply system which is capable of maintaining a high conversion rate for different loads. The power supply system comprises an input stage circuit, a front stage boosting circuit, a power stage circuit with a transformer, and a power factor controller which is in electrical connection with the front stage boosting circuit and carries out power factor control, the front stage boosting circuit increases the input voltage and outputs a front stage voltage to the transformer, the power stage circuit generates an output voltage. The power supply system also comprises a detection load circuit and a voltage adjusting device, wherein the detection load circuit is coupled to the primary side of the transformer of the power stage circuit to obtain a load voltage which is proportional to the load, and the voltage adjusting device decreases or increases the front stage voltage according to the load represent by the load voltage and the input voltage. Compared with the prior art, the front stage voltage of the power supply system can be adjusted automatically, a certain conversion efficiency is maintained in full load, light load or middle load, and the conversion efficiency in light load or middle load is better than that in the prior art.
Description
technical field [0001] The present invention relates to the technical field of power supply systems, and more specifically relates to a power supply system that automatically adjusts the voltage of the front stage through the improved design of the front stage circuit to maintain high conversion efficiency for different loads. Background technique [0002] Please refer to figure 1 , the existing power supply system 900 includes an input stage (Input stage) circuit 91, a power factor adjustment stage (Power factor correction stage) circuit 92, a power stage (Power stage) circuit 93 and a feedback stage (Feedback stage) Circuit 94. [0003] Wherein the input stage circuit 91 includes an electromagnetic interference filter 911 and a bridge rectifier 912; the electromagnetic interference filter 911 is used to prevent the conductive electromagnetic noise generated by connecting external devices from interfering with each other through the power wire, and the bridge rectifier 912...
Claims
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IPC IPC(8): H02M7/217H02M3/157
CPCY02B70/10
Inventor 梁适安黄敬文张哲毓
Owner SPI ELECTRONICS