A control method and device for vehicle DC bus voltage fault

Abstract

The invention provides a method and a device for controlling DC bus voltage fault of a vehicle. The method controlling DC bus voltage fault of the vehicle comprises the steps that detecting whether the DC bus voltage obtained from the integrated controller is a normal condition; if the DC bus voltage obtained from the integrated controller is not a normal condition, determining the fault level according to the working parameters of a plurality of components connected with the DC bus; according to the fault level, executing a preset processing mechanism corresponding to the fault level. When a fault of the DC bus voltage occurs, the fault serious degree of the vehicle is judged according to the working parameters of the plurality of components connected with the DC bus, the processing mechanism corresponding to the fault level is implemented at each fault level, thus the car can ensure the driving experience of the driver under the premise of safe driving.

Description

technical field [0001] The invention relates to the field of voltage faults of a vehicle DC bus, in particular to a control method and device for a voltage fault of a vehicle DC bus. Background technique [0002] In the face of increasingly severe energy and environmental problems, energy-saving and new energy vehicles are becoming the focus of current research in various countries. In my country, energy-saving and new energy vehicles have been highly valued by the government and industry, and have been designated as one of the strategic emerging industries. As a type of energy-saving and new energy vehicles, pure electric vehicles have many advantages such as no exhaust emissions, high energy efficiency, low noise, and energy recycling during driving. Conservation matters. [0003] With the rapid development of pure electric vehicles, integrated control has become the current development trend of pure electric vehicles. Integrated control, as the name suggests, relies on...

AI Technical Summary

Problems solved by technology

At present, the majority of pure electric vehicle manufacturers and related research institutions are researching the safety mechanism when the DC bus voltage detects a fault, and give relevant safety strategies, but these safety strategies are not based on the integrated controller. The safety strategy given is relatively rough. For example, when the vehicle cannot detect the DC bus voltage, it will immediately perform operations such as zero torque, turn off the motor IGBT output, and immediately power off the high voltage. Although the above safety mechanisms can guarantee driving safety to a certain extent, but It has a great impact on the driving experience of the driver and the occupants, and will seriously reduce the user's driving experience

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