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Method of discharging at least one electrical energy storage unit, in particular a capacitor, of an electrical circuit

A technology of electric energy storage and capacitors, which is applied in the direction of electrical components, battery/battery traction, emergency protection circuit devices, etc., and can solve problems such as reduced service life and deterioration of electronic components

Active Publication Date: 2016-07-13
VALEO SYST DE CONTROLE MOTEUR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These solutions have the disadvantage of degrading the electronic components of the inverter or of the DC-DC voltage converter and / or reducing their service life

Method used

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  • Method of discharging at least one electrical energy storage unit, in particular a capacitor, of an electrical circuit
  • Method of discharging at least one electrical energy storage unit, in particular a capacitor, of an electrical circuit
  • Method of discharging at least one electrical energy storage unit, in particular a capacitor, of an electrical circuit

Examples

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Embodiment Construction

[0087] figure 1 A portion of a circuit that can perform the discharge method is shown. In the example described, the method allows the discharge of a capacitor, but the invention is not limited to the discharge of this exemplary component.

[0088] The circuit 1 comprises a switching system 2 comprising a plurality of legs 3 each extending between a positive conductor 4 and a negative conductor 5 of a direct current bus 7 .

[0089] In the example under study, the switching system 2 is a three-phase DC-AC converter, but the invention is not limited to this example. In the present example, each leg 3 comprises two controllable switching cells 10 .

[0090] The chopping frequency of the switching system 2 is, for example, 10 kHz. Each switching cell 10 is formed, for example, by a controllable switch 11 with a flyback diode 12 connected in antiparallel. The switch 11 may be a transistor, in particular a field effect transistor, a bipolar transistor or an IGBT type transistor...

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PUM

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Abstract

Method of discharging at least one electrical energy storage unit of an electrical circuit (1), the electrical circuit (1) furthermore comprising a switching system (2) comprising a plurality of arms (3) each extending in parallel between a positive conductor (4) and a negative conductor (5) of a DC bus (7), each arm (3) comprising in series at least two switching cells (10), in which method, to discharge the capacitor (20, 40), a short-circuit between the positive conductor (4) and the negative conductor (5) of the DC bus (7) is produced in at least two of the arms (3) of the switching system (2) so as to allow the discharge current (IDC) of the electrical energy storage unit to flow from said positive conductor (4) to said negative conductor (5).

Description

technical field [0001] The invention relates to discharging at least one electrical energy storage unit, in particular a capacitor, in an electric circuit. [0002] The invention is particularly applicable to electrical circuits comprising electrical windings of rotary motors. The circuit can be used to propel a vehicle, such as a motor vehicle, with the help of an electric motor. Background technique [0003] The circuit comprises at least one electrical energy storage unit, such as a capacitor, which needs to be discharged to comply, for example, with the requirements of the EN50178 standard of 1997: "Electronic equipment for use in power installations". The voltage across the terminals of the electrical energy storage unit is known between the terminals of an externally accessible circuit, and the presence of this voltage poses a danger to an operator such as, for example, a mechanic. [0004] In the aforementioned automotive applications, it is known to be common pract...

Claims

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Application Information

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IPC IPC(8): H02H7/122H02M1/32
CPCB60L50/60H02M1/32H02M1/322Y02T10/70B60L2270/00H02P31/00
Inventor E.埃斯诺尔特
Owner VALEO SYST DE CONTROLE MOTEUR