Description Of Functions; Operating Modes; Speed-Controlled Operation; Bl Motors With Digital Hall Sensors - Faulhaber 22 BX4 SC Series Technical Manual

Description of functions

5 Description of functions
5.1

Operating modes

5.1.1

Speed-controlled operation

The actual value for speed used for speed control can be determined by means of the sig-
nals used for commutation. The configurations described below differ with regard to the
used commutation type.
The digital output is factory-configured as the frequency output.
5.1.1.1

BL motors with digital Hall sensors

Digital output
FG
22 kΩ
Setpoint input U
nsoll
0 – 10 V DC
Rotational direction input
DIR
Microcontroller
Fig. 12: Block diagram of a BL motor with digital Hall sensors
The resolution of the digital Hall sensors means that stable control of the following
mechanical speeds is possible:


In this configuration, the commutation signal is determined via the digital Hall sensors. The
actual value for speed is determined using the time interval between the edges of the Hall
sensor signals.
2nd edition, 31-03-2020
Electronics supply
U
p
Protection function:
Overtemperature
n
PI velocity
soll
controller
Evaluation
rotational
Speed
direction
calculation
BXT H series: from approx. 200 min
All other series: from approx. 400 min
Motor supply
U
mot
3 Phase
MOSFET
PWM
Power
output
U block
a
stage
commutator
Armature
(t)
position
calculation
I
I ² t current
ist Motor
limitation model
RM k
E
GND
-1
-1
7000.05061, 2nd edition,
24
Phase A
Phase B
BL-Motor
Phase C
Hall sensor A
Hall sensor B
Hall sensor C
VCC
5 V-Control
+5 V
Signal GND
31-03-20207000.05061