Parker TM Series, Technical Manual

Page: 52 / 129

52 - PVD 3622_GB_TM_January 2014.Docx
3.2.11. Speed ripple
Following values are given as indicative data because depending on the settings of
the drive (gains of both speed and current regulation loops, presence of filtering or
not, load inertia, resistant torque and type of sensor in use). The data below
correspond to a motor type TMW206HS without external load (neither external inertia
nor resistant torque).
(Following data are indicatives)
Sensor Speed ripple peak to peak [%]
Re pulleys-belt ratio=6 4% ... 30% or higher depending on the max speed
EnDat e pulleys-belt ratio=6 3.4% ... 4% or higher depending on the max speed
Endat in direct 1% or higher depending on the max speed
3.2.12. PWM frequencies
– Noise according to PWM frequency
The converter supplies the motor with series of PWM voltage pulses occurring at the
switching frequency.
Following values of PWM frequency are given for AC890 Parker drives:
AC890 Parker Drives
Frame B, C & D : 4 and 8 kHz
All others frames: only 4 kHz, either standard or PX frames.
Noise according to EN ISO 1680 :
For a switching PWM frequency of 8 kHz: <70dBA @ 200 rpm max
For a switching PWM frequency of 4 kHz: <80dBA @ 200 rpm max
N.B. As the noise level increases when the PWM frequency
decreases, the current ripple has to be limited to 10% to 15% of the
nominal current in order to reduce the torque ripple.