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Concerning high harmonic content and low power factor of general AC voltage regulation, a high power factor AC voltage regulation is proposed under great voltage. Green voltage regulator which adopts two single phase voltage regulations to work together can minimize harmonic content and improve power factor. Based on transformer coupling, green voltage regulator has the advantages of high commonality...
In order to adapt the power delivery requirements of modern microprocessors of high current, low voltage and faster transient response, interleaving VRM with coupled inductors should be used. At first, this paper presents a numerical analysis of benefits of 2-phase coupled inductors and gives out the region of coupling coefficient in which the transient response speed increases meanwhile the steady-state...
Usually for a CPU voltage regulator (VR), there are several different coupled inductor VR setups to improve the CPU VR performance. For example, there are three different coupled inductor VR setups for a 6 phase CPU VR: 3*2 phase coupled inductor VR, 2*3 phase coupled inductor VR and 1*6 phase coupled inductor VR. Based on one industrial CPU VR demo board, the different coupled inductor VR setups...
In today's CPU Voltage Regulator(VR) industry, coupled inductor VRs have begun to replace the non-coupled VRs for their better performances. However, today's coupled inductor implementations have long winding paths, which is not preferred in the high current CPU VR application. In this paper, several short winding path coupled inductor structures for 2 and more phase coupled inductors are proposed...
In the past few years, coupled inductors are more and more popular in microprocessor voltage regulators(VRs) for they can increase the VRs' steady state and transient performances. In this paper, twisted core coupled inductors are proposed to reduce the winding path of coupled inductors. Then, the reluctance model of twisted core coupled inductors is proposed. After that, based on the proposed reluctance...
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