SMT-BD2
1.3
-
O
THER SPECIFICATIONS
PWM
switching
frequency
10
KHz
Current regulator (PI)
Adjusted to motor
Current loop bandwidth
Cut-off frequency for 45° phase shift > 1 KHz
Internal
current
limitation
Maximum current range : 20 % to 100 % of Imax
Rated current range : 20 % to 50 % of Imax
Imax
=
amplifier
current
rating
Analog current limitation input
0 V to 10 V, resolution = 12 bits
100 % to 0 % of the Maximum current value
Maximum
current
available
if
not
connected
Analog speed command input
±10 V, standard resolution = 12 bits
Resolution
=
16
bits
optional
Motor accel/decel ramp range
From 0 to 30 s between zero speed and
max.
speed
Speed regulator P, PI or PI
2
Sampling period = 0,5 ms
Anti-wind-up system of the integrator
Adjustable
digital
gains
Antiresonance
filter
Speed loop bandwidth
Cut-off frequency for 45° phase shift
Selectable : 50 Hz, 75 Hz or 100 Hz
(
see Note 1
Speed range
2048 : 1 with 12 bit input command
32768 : 1 with 16 bit input command
Max. motor speed
Adjustable from 100 rpm to 25000 rpm
(
see Note 2
Hall sensors input
Selectable by jumpers : 120° or 60° HES type
5
V
or
15
V
supply
voltage
HES
sequence
error
detection
1
Note 1 :
The maximum speed loop bandwidth value not only depends on the amplifier specification but also on the feedback encoder
resolution and the motor mechanical load. The lower the encoder resolution, the lower the servo loop gains and the servo loop
bandwidth, to avoid any motor noise due to signal quantization effect. The mechanical load backlashes and elasticity can also
limit the servo loop gains and bandwidth to avoid mechanical resonances. The optimal servo loop gain value for a given
application can be automatically calculated by using the amplifier Auto-tuning procedure.
2
Note 2 :
The Max. motor speed value not only depends on the motor specification but also on the encoder specification. Both following
conditions must be answered for taking into account the maximum encoder pulse frequency value :
Max. motor speed (rpm) < 60 x 10
6
/ Number of encoder pulses per revolution
Max. motor speed (rpm) < 60 x Encoder pulse frequency limit (Hz) / Number of encoder pulses per revolution.For example with
the ROD426 (Heidenhain) series encoder, the pulse frequency limit value is 300 KHz. So, a motor equipped with a ROD426
encoder having a resolution of 5000 ppr cannot exceed 3600 rpm.
11
Chapter 2 - Specifications
