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Electric vehicle battery charger comprising a pfc circuit

一种功率因数校正、电池充电器的技术，应用在电动汽车充电技术、电动汽车、输出功率的转换装置等方向，能够解决没有解决方案等问题

Active Publication Date: 2016-05-11
META SYST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] It is therefore obvious that the performance of these devices will be maximized only if they operate near the point of resonance, and will be limited at all other points at different values ​​from this output voltage, and there is no particular solution beyond that

Method used

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  • Electric vehicle battery charger comprising a pfc circuit

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Embodiment Construction

[0019] With particular reference to the drawings, a battery charger can be indicated generally by reference C, which can be used to charge the battery of an electric vehicle.

[0020] Specifically, the electric vehicle battery charger C includes:

[0021] - Resonant DC / DCCONV voltage converter;

[0022] - PFC power factor correction circuit connected upstream of the DC / DCCONV voltage converter;

[0023] - a PFCCNTR controller circuit connected to the PFC correction circuit for directing the correction circuit to correct the power factor and supplying a stable output DC voltage V PFC .

[0024] Specifically, the DC / DCCONV voltage converter includes a DC / DC converter using resonant LLC technology.

[0025] Advantageously, the battery charger C further includes a feedback line L, which is respectively connected to the output terminal of the DC / DCCONV voltage converter and an input terminal of the PFCCNTR controller circuit.

[0026] In particular, the PFCCNTR controller circu...

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Abstract

The battery charger (C) for electric vehicles comprises a voltage converter (DC / DC CONV), a power factor correction circuit (PFC) connected upstream of the voltage converter (DC / DC CONV), a controller circuit (PFC CNTR) operatively connected to the correction circuit (PFC) and suitable for piloting the correction circuit (PFC) for the correction of the power factor in the battery charger (C), a retroaction line (L) connected to the output of the voltage converter (DC / DC CONV) and to an input of the controller circuit (PFC CNTR), wherein the controller circuit (PFC CNTR) is suitable for varying the output voltage (VPFC) of the correction circuit (PFC) within a predefined voltage interval and according to the output voltage (VDCOUT) of the voltage converter (DC / DC CONV), in order to let the voltage converter (DC / DC CONV) operate as much as possible around the point of maximum efficiency.

Description

technical field [0001] In a conventional alternating current / direct current (hereinafter referred to as AC / DC) conversion circuit having a certain power, it is well known to employ two stages connected in series. Background technique [0002] The first stage performs power factor correction (PowerFactorCorrection, referred to as PFC) at the input, and aims to draw current from a power source that is as sinusoidal as possible and whose phase is consistent with the input voltage, so as to absorb the maximum active power without considering the power absorption limited by the electrolytic capacity peak. [0003] The PFC process usually provides a constant DC voltage stably for the next stage. [0004] The second stage is composed of a DC / DC (hereinafter referred to as DC / DC) converter, which receives the voltage supplied by the PFC, and provides a variable or fixed DC voltage from the output terminal according to the user's requirements, and simultaneously realizes the power s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/42H02J7/02
CPCH02M1/4208H02J7/02B60L53/20B60L53/66H02J2310/48Y02T90/12Y02T90/16Y02T10/70Y02T10/7072Y02T90/14H02M1/0048H02M1/007H02J5/00Y02B70/10
Inventor 切萨雷·拉萨吉尼
Owner META SYST
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