
Antriebstechnik GmbH
Technical Documentation EC863 and ECE3AP-00-01
Page 11 of 18
(02/99) R0047GB.DOC
3.4.3
Rotor position transmitter
The signals of the rotor position transmitters (3x120° staggered commutation sensors) are
used for the commutation control of the motor phases. The actual speed is also recorded
with the rotor position transmitter signals. With standard equipment a control range of 1:40
can be achieved.
The commutation sensors must be connected to the drive regulator according to the
following diagram. The sensor wiring must be shielded.
+15V (X4-2)
Sensor power supply (Standard 15VDC)
GND (X4-3)
Reference potential
S2 (X4-4)
Rotor position transmitter with internal
S3 (X4-5)
Pull-up resistances 1 k
Ω
, 6 V Reference voltage
S1 (X4-6)
HIGH at input signal > 4 V
LOW at input signal < 1 V
Motor connection see chap. 3.4.1
Speed gauging via rotor position transmitter
The speed is proportional to the signal frequency of the commutation sensors installed in
the motor. If the frequency is gauged at a sensor input, the following applies:
f ... Signal frequency [Hz]
p ... number of pole pairs
n ... Synchronous speed [r.p.m.]
p
60
f
n
×
=
X4
4
3
1
6
5
Drive regulator
VCC
GND
S2
S1
S3
N
EC
motor
N
S
S
0
60
120 180 240 300 360 420 480 540
S2
S3
S1
I
U
V
W
I
I
electrical angle
600 660 720
2