Method for controlling electric traction system and corresponding electric traction system

An electric drive system, electric drive technology, applied in the direction of electric device, control drive, control device, etc., to achieve the effect of prolonged use, prevention of insulation degradation, and promotion of Joule heating
CN105492234BActive Publication Date: 2017-12-15RENAULT SA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
RENAULT SA
Publication Date
2017-12-15

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Abstract

A method controls an electric drive system of a vehicle including an electric drive motor, a drive battery, and a drive inverter. The method includes detecting that a measurement of an insulation resistance between the battery and a chassis of the vehicle is below a preset threshold, detecting a closed state of relays connecting the battery to the inverter, and following the detecting the measurement and the detecting the closed state, activating a cooling fan of the electric drive motor until detecting that a measurement of the insulation resistance is above the preset threshold, within a limit of a first preset duration.
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Description

technical field

[0001] The present invention relates generally to the fields of electric power and hybrid or electric vehicles. More precisely, the invention relates to a drive system for an at least partially electrically driven vehicle. Background technique

[0002] Such vehicles include at least one drive battery that supplies power to an electric motor via an inverter. Since a drive battery has an open circuit voltage of possibly as high as 400V, the drive system powered by such a drive battery must be isolated from the chassis of the vehicle. Personnel performing maintenance on the vehicle are thus protected from the risk of electric shock associated with simultaneously touching the chassis of the vehicle and one of the terminals of the drive battery.

[0003] As described, for example, in European patent application EP 1 981 143, the insulation resistance between the drive battery of the vehicle and the chassis of the vehicle is continuously measured during operation...

Claims

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