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Adjustment method for speed-controlled electronic drive and apparatus for implementing the same

An adjustment method and speed control technology, applied in the direction of control drives, electric vehicles, control devices, etc., can solve problems such as complex parameters of electric drives, and achieve the effect of avoiding unexpected behavior and predictable control response

Inactive Publication Date: 2016-05-11
ABB TECH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tuning the parameters of an electric drive can be a complex (sometimes impossible) task

Method used

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  • Adjustment method for speed-controlled electronic drive and apparatus for implementing the same
  • Adjustment method for speed-controlled electronic drive and apparatus for implementing the same
  • Adjustment method for speed-controlled electronic drive and apparatus for implementing the same

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Embodiment Construction

[0018] The present disclosure proposes a method of tuning a speed-controlled electric drive for an electric vehicle. In this method, the rotational speed of the electric drive is controlled by a frequency converter based on a constrained speed reference.

[0019] The method includes: determining an actual rotational speed of the vehicle; receiving an unconstrained speed reference for the vehicle; calculating a constrained speed reference based on the unconstrained speed reference; and if the determined rotational speed is between the constrained speed reference and the unconstrained speed reference, then set the constraint velocity reference to the same value as the determined rotation velocity. After updating the value of the constrained speed reference, the constrained speed reference may continue to ramp up (or down) according to the updated value. The term "unconstrained speed reference" in the context of this disclosure refers to a requested, unconstrained speed referenc...

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Abstract

The present disclosure describes an adjustment method and apparatus for implementing the method for a speed-controlled electric drive of an electric vehicle. In the method, a rotational speed of the electric drive is controlled by a frequency converter on the basis of a constrained speed reference. The method comprises determining the rotational speed, receiving an unconstrained speed reference, calculating the constrained speed reference on the basis of the unconstrained speed reference, wherein a rate of change of the constrained speed reference is limited to a predefined range, and if a value of the determined rotational speed is between the values of the constrained speed reference and the unconstrained speed reference, setting the value of the constrained speed reference the same as the value of the determined rotational speed.

Description

technical field [0001] The present disclosure relates to speed controlled electric drives of electric vehicles, and more particularly to adjustment of the drive's speed reference. Background technique [0002] Typically, electric vehicles are powered by torque controlled electric drives. However, in some applications the use of a speed-controlled electric drive may be desirable. Certain benefits and savings can be realized through the use of speed-controlled drives. [0003] However, speed controlling electric drives can pose a challenge to the control system, for example when the speed reference originates from an operator (eg, a human) operating the vehicle. For example, a speed reference may originate from a speed pedal operated by an operator. During acceleration and deceleration, the speed reference can change significantly for a short period of time. In the context of this disclosure, the term "acceleration" refers to an increase in speed, ie to speed up. The term...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L15/20
CPCB60L15/20B60L2240/12B60K31/04B60L2200/26B60L2240/421B60L2240/461B60W30/143B60W50/10B60W2710/081B60W2720/106Y02T10/64Y02T10/72
Inventor 海基·哈卡拉图奥莫·莱皮宁伊斯莫·科伊武
Owner ABB TECH AG
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