Fluctuating electric energy recycled high-accuracy DC/DC (direct current/direct current) converter
A high-precision, converter technology, applied in the direction of adjusting electrical variables, high-efficiency power electronic conversion, output power conversion devices, etc., can solve the problem of difficult control of switching devices, limited step-up or step-down range, and complex control strategies and other problems, to achieve the effect of easy control strategy, large voltage transformation range and simple structure
Inactive Publication Date: 2013-12-11
南通飞尔浦斯光电有限公司
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Problems solved by technology
However, the Boost / Buck circuit topology has the following disadvantages: the step-up or step-down range is limited, it is difficult to control the on-off of the switching device when the voltage is greatly changed, and the output voltage is prone to instability; when the input side voltage fluctuates, The control strategy is more complex and difficult to implement
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[0021] in such as figure 1 As shown, the topology of the high-precision DC / DC converter 100 according to an embodiment of the present invention includes: an input side voltage stabilizing capacitor C 1 , unipolar high-frequency inverter 10, adjustable series resonant circuit 20, high-frequency transformer T h , high frequency uncontrollable rectifier 30, output side voltage stabilizing capacitor C 2 , which are sequentially connected in sequence.
[0022] The input side regulator capacitor C 1 For stabilizing the input voltage U in .
[0023] The unipolar high-frequency inverter 10 includes: a first high-frequency switch S 1 , the first high frequency diode D 1 , the second high frequency switch S 2 , the second high frequency diode D 2 , the first high frequency switch S 1 with the first high frequency diode D 1 antiparallel and a second high frequency switch S 2 with the second high frequency diode D 2 Anti-parallel and then series connection, the second high-fre...
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The invention provides a fluctuating electric energy recycled high-accuracy DC / DC (direct current / direct current) converter (100). The fluctuating electric energy recycled high-accuracy DC / DC converter comprises an input side voltage-stabilizing capacitor (C1), a monopole high-frequency inverter (10), an adjustable type series resonant circuit (20), a high-frequency transformer (Th), a high-frequency uncontrollable rectifier (30) and an output side voltage-stabilizing capacitor (C2) which are sequentially connected to one another, wherein the monopole high-frequency inverter (10) is used for transforming a direct current voltage fluctuating at an input side into a monopole impulse voltage; the adjustable type series resonant circuit (20) is used for transforming the monopole impulse voltage into a sinusoidal voltage with fixed frequency, and the fine adjustment on a direct current voltage at an output side can be realized by adjusting the capacity of a resonance capacitor; the high-frequency isolation transformer (Th) is used for boosting and isolation protection; and the high-frequency uncontrollable rectifier (30) is used for rectifying a high-frequency sinusoidal voltage into a stable direct current voltage. The converter (100) is simple in control manner and high in accuracy and can be applied to a fluctuating electric energy recycling system.
Description
technical field [0001] The invention relates to a DC / DC converter, in particular to a DC / DC converter with variable input voltage, high frequency, series resonant soft switching, high precision and used for recovering fluctuating electric energy. Background technique [0002] Energy recovery systems such as photovoltaic power, wind energy, or electric vehicles fluctuate with changes in external factors (such as temperature, light intensity, wind speed, engine speed, etc.), and are not convenient for direct recovery, storage, and utilization. The DC / DC converter is a conversion circuit that uses semiconductor switching devices to cooperate with inductors, capacitors, transformers and other devices to control the output DC voltage by controlling the rapid on and off of the semiconductor switching devices. , The uncontrollable DC voltage is transformed into a controllable DC voltage that meets the system requirements. At present, a commonly used DC / DC converter adopts a Boost...
Claims
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IPC IPC(8): H02M3/335H02M7/537
CPCY02B70/10
Inventor 刘闯
Owner 南通飞尔浦斯光电有限公司