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

Active Publication Date: 2017-12-15
RENAULT SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is therefore a risk that the safety mechanisms associated with the monitoring of the insulation resistance of the vehicle will frequently limit the recharging of the drive battery and the use of the vehicle to a degraded mode, thus preventing or limiting, for example, the electric mode

Method used

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  • Method for controlling electric traction system and corresponding electric traction system
  • Method for controlling electric traction system and corresponding electric traction system

Examples

Experimental program
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Embodiment Construction

[0026] According to figure 1 A preferred embodiment of the invention shown in the electric drive system SYS of the electric vehicle VE comprises:

[0027] - electric drive motor ME,

[0028] - drive inverter OND,

[0029] - The drive battery Batt, allowing the electric motor ME to be powered via the drive inverter OND in drive mode, ie when the vehicle VE is moving. In this application drive mode means that the stator current and / or rotor current is not zero, ie the inverter is controlled to react to the motor torque setpoint. This driving mode excludes the recharging mode of driving the battery Batt.

[0030] Relays REL, also forming part of the drive system SYS, allow the drive battery Batt to be electrically connected to the inverter OND, which also receives on its transistors control setpoints of the electric motor ME from the electronic control unit.

[0031] The electric drive system SYS also comprises a cooling fan VR allowing cooling of the electric motor ME in dri...

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PUM

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L3/00
CPCB60L3/0069B60L58/10Y02T10/70B60L3/003B60L15/20B60L15/22B60L2240/54B60L3/0046B60L3/0061B60L3/12B60L2240/425
Inventor W·本 艾哈迈德P·多尔奇尼I·艾特-哈穆达P·勒-尼尔
Owner RENAULT SA
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