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Single-stage PFC (power factor correction) converter and electric vehicle charging apparatus equipped with same

A converter, single-stage technology, applied in the direction of output power conversion device, DC power input conversion to DC power output, AC power input conversion to DC power output, etc., can solve complex control circuits, many components, and many losses and other problems, to achieve the effect of reducing volume, small volume and high utilization rate

Inactive Publication Date: 2016-04-06
BEIJING ELECTRIC VEHICLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the related art, the circuit topology of the charging device is a series structure of a PFC circuit and a DC / DC converter. The stability and precision of this structure are relatively high, but many components are used, the control circuit is complicated, and two stages are connected in series. much loss

Method used

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  • Single-stage PFC (power factor correction) converter and electric vehicle charging apparatus equipped with same
  • Single-stage PFC (power factor correction) converter and electric vehicle charging apparatus equipped with same
  • Single-stage PFC (power factor correction) converter and electric vehicle charging apparatus equipped with same

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Embodiment Construction

[0025] 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.

[0026] The single-stage PFC converter of the embodiment of the present invention and the charging device for electric vehicles with it will be described below with reference to the accompanying drawings.

[0027] figure 1 is a circuit topology of a unipolar PFC converter according to an embodiment of the present invention. Such as figure 1 As shown, the unipolar PFC converter includes: a first rectifier bridge 10, a PFC full bridge circuit 20, a high frequency transformer TF, a rectifier filter circuit 30 and a control unit (no...

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Abstract

The invention discloses a single-stage PFC (power factor correction) converter and an electric vehicle charging apparatus equipped with the same. The converter comprises a first rectifier bridge, a PFC full-bridge circuit, a high frequency transformer, a rectification filter circuit and a control unit, wherein the first rectifier bridge is connected with an input power supply; the PFC full-bridge circuit is connected with the first rectifier bridge; the PFC full-bridge circuit comprises a first switching device, a second switching device, a third switching device and a fourth switching device that form a full-bridge bridge arm and are provided with a first node and a second node; one end of the primary winding of the high frequency transformer is connected with the first node through leakage inductance while the other end of the high frequency transformer is connected with the second node; the rectification filter circuit is connected with the secondary winding of the high frequency transformer; and the control unit controls the first switching device, the second switching device, the third switching device and the fourth switching device so as to enable the single-stage PFC converter to realize power factor correction and DC / DC isolation conversion. The converter can realize the power factor correction and electrical isolation between a high voltage circuit and a low voltage circuit; and in addition, the single-stage PFC converter is small in size and high in working efficiency.

Description

technical field [0001] The invention relates to the field of power supply technology, in particular to a single-stage PFC (Power Factor Correction, power factor correction) converter and a charging device for an electric vehicle having the same. Background technique [0002] Whether the charging device of an electric vehicle is an on-board charger or a DC charging pile, the circuit topology is inseparable from the PFC circuit. The PFC circuit is an important part of converting AC power to DC power. It can not only ensure that the power supply does not affect the quality of the power grid during switching, but also reduce current harmonic distortion and reactive power generated during power supply operation. [0003] In the related art, the circuit topology of the charging device is a series structure of a PFC circuit and a DC / DC converter. The stability and precision of this structure are relatively high, but many components are used, the control circuit is complicated, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/217H02M3/335H02M1/42
CPCH02M1/4233H02M3/33523H02M7/2173Y02B70/10
Inventor 赵春阳
Owner BEIJING ELECTRIC VEHICLE
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