Method and system for inhibiting torsional vibration of power system of electric vehicle

An electric vehicle, power system technology, applied in electric vehicles, control drive, power management and other directions

Active Publication Date: 2017-01-11
深蓝汽车科技有限公司
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0005] In view of this, the present invention provides a method and system for suppressing the torsional vibration of the power system of an electric vehicle, to suppress the torsional vibration o...

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  • Method and system for inhibiting torsional vibration of power system of electric vehicle
  • Method and system for inhibiting torsional vibration of power system of electric vehicle
  • Method and system for inhibiting torsional vibration of power system of electric vehicle

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Embodiment Construction

[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. 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.

[0052] see figure 1 , figure 1 It is a flow chart of a method for suppressing torsional vibration of a power system of an electric vehicle disclosed in an embodiment of the present invention.

[0053] A method for suppressing torsional vibration of an electric vehicle power system provided by the invention includes:

[0054] S101. Obtain the actual wheel speed of the wheel at the current moment, and calculate the theoretical motor speed according to the actu...

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Abstract

The invention provides a method and a system for inhibiting torsional vibration of a power system of an electric vehicle. The method comprises the following steps of calculating a theoretical motor rotating speed according to an actual wheel rotating speed and a preset power system speed ratio; calculating a motor rotating speed variable quantity according to an actual motor rotating speed and the theoretical motor rotating speed; calculating a motor output torque according to the motor rotating speed variable quantity and preset parameters; controlling a motor to operate according to the output torque. The method and the system provided by the invention have the advantages that the actual motor rotating speed is matched with the theoretical motor rotating speed when the motor is controlled to operate by utilization of the output torque, so that the rotating speed fluctuation of the motor is stabilized, and the torsional vibration of the power system is inhibited, therefore the jittering problem of the electric vehicle when a driver of the electric vehicle deeply treads an accelerator pedal or completely releases the accelerator pedal is eliminated, and the comfortableness of the driver in the driving process is improved.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a method and system for suppressing torsional vibration of a power system of an electric vehicle. Background technique [0002] At present, with the continuous development of electric vehicle technology, electric vehicles have gradually replaced fuel vehicles and become one of the main means of transportation for people's daily travel. [0003] When the driver is driving normally, he usually depresses the accelerator pedal slowly. At this time, the electric motor in the power system outputs a stable torque, thereby driving the wheels to drive the electric vehicle to drive normally. [0004] However, when the driver needs to step on the accelerator pedal deeply or completely release the accelerator pedal, the torque output by the motor will fluctuate greatly, causing the speed of the motor to fluctuate greatly, resulting in torsional vibration in the power system, and th...

Claims

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Application Information

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IPC IPC(8): B60L15/20
CPCB60L15/20B60L2240/423Y02T10/72
Inventor 陈健朱天宇苏岭周洪波刘帅
Owner 深蓝汽车科技有限公司
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