Slip control device for electric vehicle
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United States of America Patent
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Oct 25, 2016
Issued Date -
N/A
app pub date -
Nov 24, 2015
filing date -
Jun 3, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A slip control device for an electric vehicle which determines without error slippage occurrence with only a rotation angle sensor for motor rotation control and perform rapid control to eliminate the slippage. A threshold calculator calculates a normal angular acceleration of a motor depending on a manipulation amount of an accelerator to obtain a threshold, and an angular acceleration calculator differentiates a detection value from a rotation angle sensor twice to calculate an angular acceleration. A slip determination determines whether a wheel driven by a motor has slipped, and a torque limitation limits a torque when determining a slippage. The determination compares the calculated acceleration to the threshold, counts a number of times it is consecutively determined that the calculated acceleration exceeds the threshold, and determines a slippage if the number of times has reached a set value.
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