Single-phase interleaved pfc circuit and its on-board charger and electric vehicle
An interleaved, single-phase technology, applied in electric vehicles, collectors, circuit devices, etc., can solve the problem of inability to invert the DC side power into AC output, and achieve the effect of simple structural changes
Active Publication Date: 2019-09-13
BYD CO LTD
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Problems solved by technology
[0003] However, in the related art, the electric energy of the interleaved PFC circuit can only flow in one direction, and it is impossible to invert the electric energy of the DC side into an AC output
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[0023] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0024] The following describes the single-phase interleaved PFC circuit proposed according to the embodiments of the present invention and the on-board charger and electric vehicle with it with reference to the accompanying drawings.
[0025] figure 1 is a topology diagram of a single-phase interleaved PFC circuit according to an embodiment of the present invention. like figure 1 As shown, the single-phase interleaved PFC circuit includes: a rectifier bridge 10, a PFC unit, a switch 30, a first switch 40 and a control unit (not...
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Disclosed are a single-phase interleaved power factor correction (PFC) circuit, an on-board charger, and an electric automobile. The circuit comprises a rectifier bridge (10), a PFC unit, a changeover switch (30), and a control unit. A first switch (40) is arranged between an input terminal of the rectifier bridge and an alternating current (AC) power source. A first switching transistor (Q1) and a second switching transistor (Q2) in the PFC unit form a first bridge arm, a third switching transistor (Q3) and a fourth switching transistor (Q4) form a second bridge arm, a first node (J1) of the first bridge arm is connected to one terminal of the AC power source via a first inductor (L1), and a second node (J2) of the second bridge arm is connected to one terminal of a second inductor (L2). A first terminal of the changeover switch is connected to one terminal of the AC power source, a second terminal of the changeover switch is connected to the other terminal of the AC power source, and a third terminal of the changeover switch is connected to the other terminal of the second inductor. The control unit controls the changeover switch, the first switch, and the first to fourth switching transistors to enable the PFC circuit to switch between a PFC operating mode and an inversion operating mode. The circuit of the present invention can not only convert alternating current into direct current, but also invert direct current into alternating current to be output.
Description
technical field [0001] The present invention relates to the technical field of PFC (Power Factor Correction, power factor correction) circuit, in particular to a single-phase interleaved PFC circuit, an on-board charger with the circuit and an electric vehicle with the circuit. Background technique [0002] The interleaved PFC circuit is mainly to place two PFC circuits with lower power in parallel in the place where a single higher-power PFC circuit was originally placed. These two PFC circuits with lower power work alternately with a phase shift of 180°. Or when summed at the output, the major part of each phase current ripple will cancel. Since the interleaved PFC circuit has many advantages, it is widely used. [0003] However, in the related art, the electric energy of the interleaved PFC circuit can only flow in one direction, and it is impossible to invert the electric energy of the DC side into an AC output. Contents of the invention [0004] The present inventio...
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IPC IPC(8): H02M1/42H02M7/797H02J7/02H02J7/00
CPCH02J7/0068H02J7/022H02J2207/20H02M1/4233H02M7/797H02M1/42Y02B70/10
Inventor 杨仕青
Owner BYD CO LTD