System and method for compensating for high-frequency leakage currents in a motor vehicle

A technology for motor vehicles and leakage current, which is applied in the direction of motor vehicles, electric vehicle charging technology, electric vehicles, etc., and can solve the problems of increasing size and increasing vehicle weight.

Inactive Publication Date: 2014-08-13
RENAULT SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the size of these converters increases with the charging power passing through them
Battery chargers installed in electric motor vehicles have the same disadvantages and the same remedies
However, the cumulative weight / power ratio defines the vehicle's mileage
It is therefore unsatisfactory to increase vehicle weight by including a converter with electrical isolation in the on-board charger

Method used

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  • System and method for compensating for high-frequency leakage currents in a motor vehicle
  • System and method for compensating for high-frequency leakage currents in a motor vehicle

Examples

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Embodiment Construction

[0017] figure 1 A single-phase power supply network 1 is shown comprising a phase different from the ground pole linked to one connector 1a and a ground pole linked to one connector 1b.

[0018] The power supply network 1 is linked to the input of a common mode filter 2 via connectors 1a, 1b. The common mode filter 2 is linked at the output via a positive connector 2a and a negative connector 2b to a rectifier 3 which itself is linked at the output to an electric motor 5 via a connector 3a and via a The connector 3 b is linked to the inverter 4 . The rectifying device 3 may include a plurality of chopper switches. Connector 3a can carry high-frequency chopping voltage, thereby generating leakage currents If1 and If2.

[0019] An electric motor 5 is linked at the output to the other input of the inverter 4 via a connector 5a. The inverter 4 is also linked to a battery 11 via connectors 4a, 4b.

[0020] Connectors 1a, 2a, 1b and 2b carry a current originating from the phase...

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PUM

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Abstract

System for compensating for high-frequency leakage currents emanating from at least one component (5) of a motor vehicle, connected to a power supply network (1) via a rectifier device (3), the power supply network (1) having an earth and at least one phase other than earth. For each component, a first compensation device (6) is connected to rectified phases originating from the rectifier device (3) upstream of the component (5), and to the motor vehicle earth (10) and/or a second compensation device (7) is connected to rectified phases downstream of the component (5) and to the earth (10), the compensation devices (6, 7) being able to pick off some of the voltage applied to the component (5) and transmit to the earth (10) a compensation current of the same amplitude and direction as the leakage current but of opposite phase.

Description

technical field [0001] The technical field of the invention is battery charging systems, and more particularly battery chargers installed in motor vehicles. Background technique [0002] Recharging a battery, especially an electric vehicle battery, using an uninsulated charger can lead to leakage currents when connected to the power distribution network. This leakage current passes through exposed conductive structures and may trip a residual current differential protection arranged between the charger and the distribution network. When these protection devices trip, the charger power is cut off, and the vehicle charging process stops. [0003] Generally, these leakage currents are limited by introducing a converter with galvanic insulation between the network and the battery. However, the size of these converters increases with the charging power passing through them. Battery chargers installed in electric motor vehicles have the same disadvantages and the same remedies....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L3/00B60L11/18H02M1/15
CPCY02T10/7005Y02T90/14Y02T90/127B60L3/0069B60L2220/54Y02T90/12B60L11/1824Y02T10/641H02M1/15B60L11/1809Y02T10/7088B60L2270/147H02M1/44B60L2230/12Y02T90/121B60L3/0061B60L53/18B60L53/30Y02T10/64Y02T10/70Y02T10/7072B60Y2200/91
Inventor C·里波尔J·杜兰德
Owner RENAULT SA
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