KMI15/4,112 NXP Semiconductors, KMI15/4,112 Datasheet - Page 7

• Manufacturer Part Number: KMI15/4,112
• Manufacturer: NXP Semiconductors

Specifications of KMI15/4,112

• Lead Free Status / RoHS Status: Compliant

Philips Semiconductors
Mounting conditions
The recommended sensor position in front of a gear wheel
is shown in Fig.15. Distance ‘d’ is measured between the
sensor front and the tip of a gear wheel tooth. The KMI15/4
senses ferrous indicators like gear wheels in the
direction only (no rotational symmetry of the sensor); see
Fig.2. The effect of incorrect mounting positions on
sensing distance is shown in Figs 11, 12 and 13.
The symmetrical reference axis of the sensor corresponds
to the axis of the ferrite magnet.
Environmental conditions
Due to eddy current effects the sensing distance depends
on the tooth frequency (see Fig.17). The influence of gear
wheel module on the sensing distance is shown in Fig.16.
2000 Jun 26
handbook, halfpage
Rotational speed sensor
pitch = module
diameter
module
pitch
=
----------------------------------------- -
number of teeth
pitch diameter
Fig.10 Gear wheel dimensions.
pitch
MRA964
y
7
Gear Wheel Dimensions
Note
1. For conversion from ASA to DIN: m = 25.4 mm/DP;
German DIN
z
d
m
p
ASA; note1
PD
DP
CP
handbook, halfpage
V
Fig.11 Sensing distance as a function of positional
SYMBOL
p = 25.4 mm
CC
(mm)
d
= 12 V; f
4
3
2
1
0
0
tolerance in the y-axis; typical values.
t
= 2 kHz; module = 2 mm; pitch diameter = 100 mm.
number of teeth
diameter
module m = d/z
pitch p =
pitch diameter (d in inch)
diametric pitch DP = z/PD
circular pitch CP = /DP
CP.
1
DESCRIPTION
d
2
m
Product specification
3
y
y (mm)
f t
KMI15/4
MBD840
mm
mm
mm
inch
inch
inch
4
UNIT
1