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Traction grid in electric vehicles

A technology for traction power grid and electric vehicles, applied in the field of traction power grid, can solve the problems of high cost and large structural space, and achieve the effect of reducing the requirement of compressive strength and small capacitance

Active Publication Date: 2021-12-03
VOLKSWAGEN AG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this measure is not only expensive but also takes a lot of space

Method used

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  • Traction grid in electric vehicles
  • Traction grid in electric vehicles
  • Traction grid in electric vehicles

Examples

Experimental program
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Embodiment Construction

[0028] exist figure 1 The traction grid 1 in a first embodiment is shown in . The traction grid 1 comprises a traction battery 2 and an inverter 3 to which an electric machine 4 is connected. The traction battery 2 and the inverter 3 are connected to each other through a positive high voltage line HV+ and a negative high voltage line HV−. The traction network 1 also has an active filter 5 consisting of an active HF filter 6 and an active LF filter 7 . A first passive common-mode filter 8 is arranged between the active filter 5 and the traction battery 2 . Another passive common-mode filter 9 is arranged between the active filter 5 and the inverter 3 .

[0029] exist figure 2 A preferred embodiment of the passive common mode filter 8 is shown in . The passive common-mode filter 8 has a first inductive element L1 and a second inductive element L2 , both of which are preferably designed as iron rings. A capacitor C is arranged between the two inductive elements L1, L2 resp...

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Abstract

Traction grid in electric vehicles. The invention relates to a traction grid (1) in an electric vehicle, comprising a traction battery (2) and an inverter (3) via a positive high voltage line (HV+) and a negative high voltage line (HV‑ ) to each other, wherein at least one active filter (5) is arranged between the positive high-voltage line (HV+) and the negative high-voltage line (HV‑) for reducing common-mode interference pulses, wherein the traction battery (2) and the active At least one passive common mode filter (8) is arranged between the source filters (5).

Description

technical field [0001] The invention relates to a traction network in an electric vehicle. Background technique [0002] The high voltage levels of power electronics components in electric vehicles cause increased interference emissions. In this case, in particular common-mode interference pulses or common-mode interference (CM) on the line between the inverter and the high-voltage battery are responsible for the increased interference emission. This is especially critical since there are multiple transmit-capable structures on the DC side. [0003] These disturbances can be suppressed by means of EMC filters. These EMV filters usually consist of capacitive elements which short-circuit the disturbance in the vicinity of the source or inductive elements which increase the impedance of the disturbance path. To reduce CM interference in electric vehicles, Y capacitors are first used between the HV line and the vehicle body. Since these Y-capacitors are an integral part of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/14H02M1/15
CPCH02M1/14H02M1/15H02J7/0063B60L3/0023B60L3/0069B60L3/0084H02M1/12H02M1/126H02M1/44H02J1/02H03H7/427H02J2310/48H02M1/123
Inventor C.瓦尔德拉M.奥布霍尔茨B.阿尔恩特P.奥尔布里希
Owner VOLKSWAGEN AG
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