Control method, device, electronic device and medium for limp mode of electric vehicle
A technology of electric vehicles and control methods, which is applied in the field of torque control, can solve the problems of not being able to provide sufficient torque and power, and achieve the effect of preventing direct downtime and improving drivability
Active Publication Date: 2022-07-05
ROX MOTOR TECH CO LTD
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Problems solved by technology
However, when the vehicle is currently in a specific scene such as uphill, heavy load, acceleration or highway, the above-mentioned conventional limp mode cannot provide enough torque and power to support the application of the above-mentioned vehicle scene
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[0041] In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of them. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0042] At present, if the device that monitors the temperature of the motor stator of the vehicle fails, in order to prevent the vehicle temperature from being too high and affecting the driving safety, the vehicle will enter the limp mode. However, the output torque of the motor in this limp mode is limited, and cannot meet some scenarios with high requirements for vehicle torque, such a...
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The invention provides a control method, device, electronic device and medium for a limp mode of an electric vehicle, and relates to the technical field of torque control, including: in the vehicle limp mode, according to the phase current input by the motor in the vehicle at every moment, determining the motor is in the limp mode. The accumulated heat of the target period, in which the phase current is used to support the motor to provide the target torque required by the vehicle in the current scenario; determine whether the accumulated heat exceeds the preset heat threshold; if it exceeds, based on the ratio of the accumulated heat to the preset heat threshold As a result, the motor is controlled to reduce the target torque, which solves the technical problem that the conventional limp mode cannot provide enough torque and power to support the application of the above-mentioned vehicle scenarios, so as to achieve a wide range of vehicle scenarios and applications on the basis of satisfying driving safety. .
Description
technical field [0001] The present invention relates to the technical field of torque control, and in particular, to a control method, device, electronic device and medium for a limp mode of an electric vehicle. Background technique [0002] When the motor stator temperature sensor fails, the motor cannot be thermally protected, and it needs to enter the limp mode to ensure that the whole vehicle can be driven to the maintenance location. [0003] Limp mode is currently achieved by directly limiting motor torque to thermally safe torque and limiting motor speed. However, when the vehicle is currently in a specific scenario such as uphill, heavy load, acceleration, or highway, the above-mentioned conventional limp mode cannot provide enough torque and power to support the above-mentioned vehicle scenario application. SUMMARY OF THE INVENTION [0004] The purpose of the present invention is to provide a control method, device, electronic device and medium for the limp mode ...
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IPC IPC(8): B60L15/20
CPCB60L15/2063B60L2240/429B60L2240/423Y02T10/72
Inventor 李洁辰
Owner ROX MOTOR TECH CO LTD