Control method and device for limping mode of electric automobile, electronic equipment and medium
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: 2021-10-22
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 purpose, 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 in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. the embodiment. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0042] At present, if the vehicle's temperature monitoring device for the motor stator fails, in order to prevent the vehicle from being overheated and affecting driving safety, the vehicle will enter a limp mode at this time. However, the output torque of the motor in this limp mode is limited, which cannot meet some scenarios that require high torque of the vehicle, such as uphill,...
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The invention provides a control method and device for a limping mode of an electric automobile, electronic equipment and a medium, and relates to the technical field of torque control. The method comprises the following steps: in the limping mode of the automobile, determining the accumulated heat of a motor in a target period according to the phase current input by the motor in the automobile at each moment, wherein the phase current is used for supporting the motor to provide target torque required by the automobile in the current scene; judging whether the accumulated heat exceeds a preset heat threshold value or not; and if yes, controlling the motor to reduce the target torque based on the comparison result of the accumulated heat and the preset heat threshold value. The invention solves the technical problem that a conventional limping mode cannot provide enough torque and power to support the automobile scene application, and therefore the method is widely applied to various vehicle scenes on the basis that the driving safety is met.
Description
technical field [0001] The present invention relates to the technical field of torque control, in particular to a control method, device, electronic equipment 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 site. [0003] Limp-in mode is currently achieved by directly limiting the motor torque to a thermally safe torque and limiting the motor speed. 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. Contents of the invention [0004] The object of the present invention is to provide a control method, device, electronic equipment and medium for the ...
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IPC IPC(8): B60L15/20
CPCB60L15/2063B60L2240/429B60L2240/423Y02T10/72
Inventor 李洁辰
Owner ROX MOTOR TECH CO LTD