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Method for controlling a battery charger for electrical accumulators

A battery charger and current technology, applied in battery circuit devices, efficient vehicle charging, electric vehicle charging technology, etc., can solve problems such as unbalanced use of electronic components of the charger, limit the size of the input coil or self-inductor, etc., to achieve Improve overall balance, reduce volume effect

Pending Publication Date: 2020-07-03
RENAULT SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, this approach exhibits the disadvantage that, since only one arm is used, the use of the charger's electronics is unbalanced
Also, unintentional current changes (called ripple) are relatively significant, thus limiting the size of the input coil or self-inductor

Method used

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  • Method for controlling a battery charger for electrical accumulators
  • Method for controlling a battery charger for electrical accumulators
  • Method for controlling a battery charger for electrical accumulators

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0041] figure 2 The structure of a three-phase Vienna rectifier 20 used in the present invention as known in the prior art is shown.

[0042]The three-phase Vienna rectifier 2 comprises three parallel input connections which are each coupled to a single-phase power supply 30 via a series induction coil La, Lb, Lc and which are each linked to a first switching arm, a second A pair of switches Sa, Sb, Sc of the second switch arm and the third switch arm.

[0043] Each pair of switches Sa, Sb, Sc consists of when the corresponding input current i a i b i c A first respective switch Sah, Sbh, Sch driven when positive and a second respective switch Sal, Sbl, Scl driven when the respective input current is negative form a head-to-tail series connection. In other words, a single switch driven on a switch branch is used to chop the current. These switches are formed by opening and closing controlled semiconductor components, such as SiC-MOS (short for Silicon Carbide-Metal Oxide...

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Abstract

The invention relates to a method for controlling a charger (10) for electrical accumulators, comprising a step of determining cyclic ratios suitable for controlling the sinusoidal currents at the input of the charger (10), and a step of applying said cyclic ratios. Said method is characterised in that said step of applying the cyclic ratios comprises: a step of selecting a first cyclic ratio application arm and a second cylic ratio application arm from the three arms of the Vienna rectifier bridge; and, during the same electrical period of the electrical grid, the application of the cyclic ratios is carried out by one of the two application arms when the absolute value of the current is lower than a threshold value, and by both of the application arms when the absolute value of the current is higher than said threshold value.

Description

technical field [0001] The present invention relates to a method for controlling a charger for charging a battery of an accumulator, and more particularly to a method for controlling a three-phase rectifier of a single-phase input charging device comprising Isolated AC to DC (AC current to DC current) converter. Such a charging device is particularly suitable for use as an on-board device in an electric or hybrid motor vehicle. Background technique [0002] These vehicles are equipped with high voltage batteries and usually include an on-board charger, ie a device installed directly in the vehicle to charge the battery. The main function of these charging devices is to recharge the batteries from the electricity available on the supply grid. The criteria pursued for charging devices, and most specifically for on-board chargers, are high efficiency, small size, galvanic isolation, good reliability, safe operation, low electromagnetic interference emissions, and low levels o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/02H02M1/42H02M7/219H02M1/10B60L53/22
CPCH02M1/10H02M1/4216H02M1/4233H02M7/219B60L53/22B60L2210/30H02J2310/48H02J7/02H02J2207/20Y02T10/72Y02T10/70Y02T10/92Y02T10/7072Y02T90/14
Inventor L·梅里耶纳P·克维斯卡
Owner RENAULT SA