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Method for operating an electric machine, device, drive device, and motor vehicle

A driving device and equipment technology, applied in the field of vehicles, can solve the problems of driving torque fluctuation, deceleration, acceleration, etc., and achieve the effect of improving driving safety

Active Publication Date: 2020-03-24
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fluctuations in the rotational speed can thus lead to fluctuations in the drive torque, for example to "jerking", ie to acceleration and deceleration in the direction of travel of the vehicle

Method used

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  • Method for operating an electric machine, device, drive device, and motor vehicle
  • Method for operating an electric machine, device, drive device, and motor vehicle
  • Method for operating an electric machine, device, drive device, and motor vehicle

Examples

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Embodiment Construction

[0018] figure 1 A device 1 for operating an electric machine 2 , for example a DC or AC motor, of a vehicle 3 not shown here is shown in a simplified illustration. The device 1 has a regulating device 4 for regulating the setpoint torque of the electric machine 2 during travel as a function of the detected time-dependent rotational speed of the electric machine 2 , in particular the rotational speed of the drive shaft of the electric machine 2 . Optional detection of multiple rotational speeds or rotational speed curves over time.

[0019] The rotational speed or the rotational speed of the drive shaft is preferably detected by means of a sensor, in particular a rotational speed sensor.

[0020] The device 1 also has a first high-pass filter 5 for differentiating the detected rotational speed as a function of time. The detected rotational speed or the rotational speed profile formed by at least two rotational speeds and the time constant T via the switching device 6 connecte...

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Abstract

The invention relates to a method for operating an electric machine (2) for a vehicle (3). A target torque of the electric machine (2) is regulated during a driving process depending on a detected time-dependent rotational speed of the electric machine (2). In the process, the detected rotational speed is differentiated by means of a first high-pass filter (5) over time, the detected rotational speed is then differentiated again over time in a limited manner to positive rotational speed values and using a second high-pass filter (8), and the target torque is regulated depending on the output value of the second high-pass filter (8).

Description

technical field [0001] The invention relates to a method for operating an electric machine of a vehicle, wherein the setpoint torque of the electric machine is adjusted during driving as a function of a detected time-dependent rotational speed of the electric machine. [0002] Furthermore, the invention relates to a device for operating an electric machine, a drive for a vehicle, and a vehicle. Background technique [0003] Methods of the type mentioned at the outset are known from the prior art. Electric machines are therefore used in vehicles to generate positive and / or negative drive torque in order to propel the vehicle or to support the drive of the vehicle. The rotational speed behavior of the electric motor is particularly important here, especially if the electric motor is provided as the sole drive machine. Fluctuations in the rotational speed can thus lead to fluctuations in the drive torque, for example to "jerking", ie to acceleration and deceleration in the di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L15/20
CPCB60L15/2009B60L2240/421B60L3/106B60L2240/423B60L2240/461B60L2240/80Y02T10/72Y02T10/64H02P23/04
Inventor M.格拉布斯
Owner ROBERT BOSCH GMBH
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