Data Sheet

7

Version1.0

2016-06-15

TLE4955C

Confidential

Operating Modes and States

Figure 4

Example for Startup Behavior and Transition from Uncalibrated into Calibrated Mode

2.2

Adaptive Hysteresis

The adaptive hysteresis is linked to the input signal. Therefore, the system is able to suppress switching if

vibration or noise signals are smaller than the adaptive hysteresis levels. The typical value for the hysteresis

The visible hysteresis keeps the excellent performance in large pitch transmission application wheels .

Figure 5

Adaptive Hysteresis

DNC=(min1+ max1)/2

max1

min1

min2

DNC=( min2+max1)/2

Phase shift change

uncalibrated mode

vs . calibrated mode

Uncalibrated Speed Signal

with negative offset

Uncalibrated Speed Signal

with positive offset

Calibrated Speed Signal

Hysteresis high level

Hysteresis low level

Vibration Suppression

via Hysteresis

Vibration Suppression

via Direction Detection

DNC:

t

t

Input signal

Adaptive hysteresis

Hysteresis high level

Hysteresis low level

Input signal

Adaptive hysteresis

t