Staggered parallel-connection direct-current voltage reduction converter with phase-by-phase coupled inductor
A DC step-down and converter technology, applied in the direction of converting DC power input to DC power output, adjusting electrical variables, output power conversion devices, etc., can solve the problem of affecting the efficiency and dynamic performance of the converter, and restricting the miniaturization of the converter, etc. problems, to achieve the effect of increasing control stability, improving dynamic response and reducing heat loss
Inactive Publication Date: 2014-02-26
LIAONING TECHNICAL UNIVERSITY
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As a key component in the converter, the inductor seriously affects the efficiency and dynami...
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[0013] The present invention will be further described below in conjunction with the accompanying drawings and implementation examples, but the protection scope of the present invention is not limited to the following implementation examples.
[0014] figure 1 It shows an interleaved parallel DC step-down converter with inductance phase-by-phase coupling of the present invention. The n-phase interleaved parallel DC step-down converter includes 2n power switch tubes VT1, VT2...VT2n, a filter capacitor C, and a The coupled inductance of n windings L1, L2...Ln, the winding of the coupled inductance is that the L1 winding is coupled with the L2 winding, the L2 winding is coupled with the L3 winding, and so on, the Ln-1 winding is coupled with the Ln winding, and the Ln winding is coupled with the L1 winding Coupling; and the Lm (1
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A staggered parallel-connection direct-current voltage reduction converter with a phase-by-phase coupled inductor of the invention comprises power switch tubes, a filtering capacitor and a coupled inductor possessing n windings. In the coupled inductance windings, a first phase inductance winding is coupled with a second phase inductance winding; the second phase inductance winding is coupled with a third phase inductance winding; an n-1th phase inductance winding is coupled with an nth phase inductance winding; the nth phase inductance winding is coupled with the first phase inductance winding; except the first phase inductance winding and the nth phase inductance winding, a mth phase inductance winding is only coupled with a m-1th phase inductance winding and a m+1th phase inductance winding and is not coupled with other windings; the first phase winding is only coupled with the second phase winding and the nth phase winding, and the nth phase winding is only coupled with the first phase winding and the n-1th phase winding. An array-type magnetic core is used to realize phase-by-phase coupling of n phase coupled inductance windings. Through designing an inductive coupling coefficient and controlling conduction time of a main switch tube, an output current ripple of the converter is reduced and dynamic response is increased.
Description
technical field [0001] The invention relates to a direct current-direct current converter, in particular to an interleaved parallel direct current step-down converter with inductance phase-by-phase coupling. Background technique [0002] At present, the voltage adjustment module used in CPU power supply generally adopts interleaved parallel Buck converter as the circuit structure to meet the requirements of dynamic response and efficiency. As a key component in the converter, the inductor seriously affects the efficiency and dynamic performance of the converter, and at the same time restricts the miniaturization of the converter. The phase-by-phase coupling of each phase inductance in the interleaved parallel DC buck converter is a new circuit topology, which is beneficial to reduce the output current ripple, improve the dynamic response of the circuit, and increase the single-phase duty factor of the multi-phase interleaved parallel control. , it is beneficial to increase ...
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Inventor 李洪珠荣德生
Owner LIAONING TECHNICAL UNIVERSITY
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