Power factor correction (PFC) circuit, switching power supply module and PFC method
A power factor correction and circuit technology, which is applied in the electronic field, can solve the problems of limited improvement of topological power density, and achieve the effects of flexible control strategy, increased power density, improved versatility and universal applicability
Active Publication Date: 2014-01-15
VERTIV CORP
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[0009] Embodiments of the present invention provide a power factor correction circuit, a switching power supply module, and a power factor correction method to solve the problem of limited improvement in topology power density of a bridgeless PFC circuit in the prior art
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[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0037] In order to solve the problem of limited increase in the power density of the bridgeless PFC circuit topology in the prior art, the embodiment of the present invention provides a brand new power factor correction circuit. This circuit topology can be set in the switching power supply module and can realize the triple frequency function. The so-called triple frequency means that the operating frequency of the inductor is equal to three times the operating frequency of the switching device. The structure of the circuit topology is as Figure 4 sho...
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The invention discloses a power factor correction (PFC) circuit, a switching power supply module and a PFC method. The circuit includes a bridge rectifier circuit, a second parallel branch, a third parallel branch, a fourth parallel branch, a fifth parallel branch, a capacitor, an inductive branch and a first parallel branch; the bridge rectifier circuit is formed by a first diode, a second diode, a third diode and a fourth diode; the second parallel branch is formed by connecting a second switching assembly and the first diode in parallel; the third parallel branch is formed by connecting a third switching assembly and the second diode in parallel; the fourth parallel branch is formed by connecting a fourth switching assembly and the third diode in parallel; the fifth parallel branch is formed by connecting a fifth switching assembly and the fourth diode in parallel; the capacitor is connected with the common end between the fourth parallel branch and the second parallel branch and also connected with the common end between the fifth parallel branch and the third parallel branch; the inductive branch is formed by connecting an AC power supply and an inductor in series; the first parallel branch is formed by connecting a first switching assembly and the two ends of the inductive branch in parallel. According to the PFC circuit, the switching power supply module and the PFC method, a triple frequency function can be achieved, so that the power density of the switching power supply module is increased when the switching power supply module works under a triple frequency working state.
Description
technical field [0001] The invention relates to the field of electronic technology, in particular to a power factor correction circuit, a switching power supply module and a power factor correction method. Background technique [0002] The switching power supply module is a capacitor input circuit. High efficiency and high power density are two important indicators of the switching power supply module. In order to achieve the goal of high efficiency and reduce the exchange power loss caused by the phase difference between current and voltage, it is necessary to Single-phase power factor correction (Power Factor Correction, PFC) circuit improves the power factor, where the power factor refers to the relationship between the effective power and the total power consumption, generally refers to the ratio of the effective power divided by the total power consumption, It can be used to measure the degree to which electricity is effectively utilized. The larger the power factor val...
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IPC IPC(8): H02M1/42
CPCY02B70/10Y02P80/10
Inventor 邓凯蒋建田高阳卢章庆
Owner VERTIV CORP