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Wheel stability control based on the moment of an electrical motor

A technology of electric motors and wheels, applied in electric vehicles, control drives, control devices, etc., can solve problems such as poor performance of wheel stability control systems, inaccurate vehicle speeds, etc.

Active Publication Date: 2017-08-18
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, a wheel angular velocity sensor may correctly detect the angular velocity of a wheel, but if the wheel is not maintaining traction with the road surface, this information will not accurately describe the vehicle's velocity
Inaccurate information about the vehicle can cause wheel stability control systems to perform poorly

Method used

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  • Wheel stability control based on the moment of an electrical motor
  • Wheel stability control based on the moment of an electrical motor
  • Wheel stability control based on the moment of an electrical motor

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Embodiment Construction

[0013] Before any embodiments of the invention are explained in detail, it is to be understood that the invention is not limited in its application to the details of construction and arrangement of components set forth in the following description or illustrated in the following drawings. The invention is capable of other embodiments and of being practiced or carried out in various ways.

[0014] figure 1 An embodiment of a drive system for an electric vehicle is illustrated. Battery 100 is electrically coupled to drive inverter 102 , which is electrically coupled to electric motor 104 . Electric motor 104 includes a motor shaft 106 that is mechanically coupled to drive wheels 108 . An electronic control unit 110 (ECU) is connected to the battery 100 , the drive inverter 102 and the electric motor 104 . In some embodiments, the motor shaft 106 is also a drive shaft, and in other embodiments, the motor shaft 106 is coupled to the drive shaft by a transmission. exist figure...

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PUM

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Abstract

A wheel stability control system for an electric vehicle including an electric motor, a drive inverter, and an electronic control unit (ECU) including a computer readable, non-transitory memory (memory) and an electronic processing unit (EPU). The memory stores information including an optimal acceleration and deceleration curve and the electrical characteristics of the electric motor. The EPU calculates the electrical moment of the electric motor from inputs from the drive inverter and the electrical characteristics of the electric motor. The ECU compares the electrical moment and the angular speed of the motor with the optimal acceleration and deceleration curve, and if the acceleration or deceleration of the electric motor is out of a predetermined range when compared to the optimal acceleration and the optimal deceleration, it reduces the electrical moment applied by the electric motor.

Description

Background technique [0001] In electric vehicles, as in conventional vehicles, maintaining control of the angular velocity of the wheels is critical to maintaining traction with the road surface. Loss of traction can occur due to excessive acceleration or deceleration (ie, hard braking). When accelerating, the wheels can receive excessive torque from the electric motor. This causes loss of traction with the road surface and wheel spin. Similarly, when a wheel receives excessive braking force, the wheel loses traction with the road surface. Modern vehicle systems strive to eliminate loss of traction and wheel spin with wheel stability control systems. These systems include, for example, anti-lock braking, traction control and stability control. [0002] The ability of vehicle sensors to determine the behavior of the vehicle limits the effectiveness of wheel stability control systems. In some situations, a vehicle's sensors provide inaccurate or misleading information about...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L3/10B60L15/20
CPCB60L3/10B60L3/102B60L3/104B60L3/106B60L3/108B60L15/2009B60L2240/12B60L2240/14B60L2240/421B60L2240/423B60L2240/427B60L2240/429B60L2240/461Y02T10/64Y02T10/72B60L3/12B60L15/20B60L15/2036B60T8/1755
Inventor M.巴赫曼
Owner ROBERT BOSCH GMBH