Etel DSC Series User Manual

Operation & Software Manual
104
Direct Drives & Systems
Chapter C: System functions ETEL Doc. - Operation & Software Manual # DSC2P 903 / Ver. F / 3/6/05
12.7.2 Phasing processes (K90)
Several phasing processes may be performed. Parameter K90 allows the user to choose the phasing type.
Remark: The depth 1 of parameter K90 is used for AUT.x=8
.
12.7.2.1 K90=1: Phasing by pulses
In this type of phasing (available only with 3-phase ironcore motor), we send some pulses with an amplitude
given by parameter K91. During the phasing, the voltage present in the motor can be reduced with parameter
K98 (useful if you have a low inductance motor drove by a 300VDC position controller).
• If K98=100: full DC bus voltage (100%)
• If parameter K98 is included between 25 and 100 : the voltage is equal to:
Example:
K98 = 50
For a controller working at 300V, the voltage used for the phasing is 150V (half of the DC bus voltage).
The method by pulses has the advantage of practically not moving the motor (some microns) but it is less
precise (about 10%) than a phasing by constant current.
12.7.2.2 K90=2: Phasing by constant current
Parameters K92, K93, K94 and K97 concern only the phasing by constant currents.
Available on DSC2P DSC2V DSCDP DSCDL DSCDM
K Name Value Comment
K90
Phasing mode
and
commutation
0
1
2
3
4
5
6
No phasing (with 1-ph. motor or EnDat 2.1 encoder)
Phasing by current pulses (3-phase ironcore motors only) (DSCDL
)
Phasing by constant current in the motor phases
Phasing with digital Hall effect sensor (mode 1) (DSCDL
)
Phasing with digital Hall effect sensor (mode 2) (DSCDL
)
Phasing and commutation with digital Hall effect sensor only (DSCDL
)
Small movement phasing
Available on DSC2P DSC2V DSCDP DSCDL DSCDM
K Name Comment Units
K91 Phasing pulse; current level Pulse amplitude when phasing by pulses [ci]
K98 Phasing voltage rate Bus voltage during the phasing by pulses %
Available on DSC2P DSC2V DSCDP DSCDL DSCDM
K Name Comment Units
K92
Phasing motor
current level
Maximum current level when phasing with constant current. [ci]
K93
Phasing motor
maximum adjustment
Pointers final position in the current loop look-up table. -
K94
Phasing motor
maximum time
Maximum time allowed before the motor is in a stable balance point.
[ms]
K97
Phasing motor
minimum adjustment
Pointers initial position adjustment in the current loop look-up table. -
DCbus K98⋅
100
--------------------------------
Time [s] K94 10
3–
⋅=

Etel DSC Series Specifications

General

Brand	Etel
Model	DSC Series
Category	Controller
Language	English