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Limp control method and system based on electric car distributed drive system

A motor drive system, a technology for electric vehicles, applied in electric vehicles, control drives, control devices, etc., can solve problems such as the inability to realize the limp function, and achieve the effect of reducing road rescue, ensuring operation stability, and reducing road occupancy

Active Publication Date: 2017-05-31
HIGER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the driving motor fails seriously, the limp function cannot be realized

Method used

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  • Limp control method and system based on electric car distributed drive system
  • Limp control method and system based on electric car distributed drive system
  • Limp control method and system based on electric car distributed drive system

Examples

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Embodiment 1

[0030] A limp control method based on electric vehicle distributed drive system, is characterized in that, comprises the following steps:

[0031] Step (1): If figure 2 As shown, during the operation of the electric vehicle, the vehicle controller judges in real time whether there is a fault in the motor drive system according to the operating state of the electric vehicle, and when a fault occurs, the vehicle controller classifies the severity level according to the fault type, and the serious The severity level is divided into: power reduction operation, single motor limp and vehicle stop; the fault types are divided into component failure, component complete failure, motor failure, high-voltage energy storage device failure, double motor failure and single motor normal; vehicle control The controller first judges whether the motor drive system is a component failure. If it is not a component failure, the whole vehicle will run normally. If it is a component failure, it wil...

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Abstract

The invention discloses a limp control method and system based on an electric car distributed drive system. The limp control method and system has the advantages that when a single drive motor fails, the output power of the drive motor is controlled on the basis of an electronic differential system necessary to hub (wheel rim) drive operation and a sensor to guarantee the operation stability of a car and achieve a limp function, the car can be timely driven to the nearest maintenance station, road occupation and roadside assistance and trailer costs during the failure are lowered, and car safety is guaranteed while unnecessary troubles are reduced.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a limp control method and system based on a distributed driving system of an electric vehicle. Background technique [0002] The structure of the electric vehicle using the distributed drive system cancels the power transmission system and the mechanical differential structure of the traditional vehicle. In order to realize the steering differential, energy saving, control stability and active safety, the electric wheel drive The car has electronic differential control. The distributed drive system directly drives the wheels, which has many advantages such as good controllability, low transmission loss, flexible internal space layout of the car body, and easy modular production. However, for a distributed drive system, if an electric vehicle stops due to a drive system failure during operation, it will easily affect urban roads, and for large pure electric vehicles suc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L15/20B60W10/08B60W30/18
CPCB60L15/20B60L2240/12B60L2240/24B60L2240/423B60W10/08B60W30/18009Y02T10/72
Inventor 胡廷辉史成龙杜卫彬熊金峰张卫林
Owner HIGER
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