Description of the Software Modules and Parameters
Parameter manual
b maXX
BM5800
Document No.: 5.16029.03
139
3
Resolver
The theoretical maximum speed is limited due to the excitation frequency (7.8125 kHz)
and the number of pole pairs at a resolver.
Example: Resolver with 1 pole pair
3.4.6.1 Length measuring devices
Length measuring devices with sinusoidal tracks
The PPR count in the parameter
>
137.1
<
must be entered and saved at length measur-
ing devices with sinusoidal tracks.
m
If the length measuring device is used to operate a linear motor the PPR count is
calculated as follows:
the read length of the signal period is shown at EnDat
2.1
or HIPERFACE
.
The pole pitch ("length of a magnet") is described in the motor data sheet.
It is recommended to use the value 1 for the pole pair number. If the PPR count
doesn't amount to an integer, then the pole pair number must be increased until an
integer is reached.
Alternatively the PPR count calculation can be performed in ProDrive under "Con-
figurationMotor\Linear-Motor".
Hereby,
Pole pitch,
Division dis-
tance measuring system (accords to the length of the signal period) must be entered
and "Calculate rotary parameters" must be pressed. The PPR count in the parame-
ter
>
137.1
<
is entered.
m
If the length measuring device is used to control the position only (
options bit 0 = 1) the user must set the PPR count accordant to the existing mechan-
ical structure.
n
max,theoretical
min
-1
f
excitation
60
20 Number of pole pairs Resolver
------------------------------------------------------------------------------------
7.8125 kHz 60
20 Number of pole pairs Resolver
------------------------------------------------------------------------------------
=
=
n
max,theoretical
min
-1
7.8125 kHz 60
20 1
--------------------------------------
23437 min
-1
=
=
PPR count
2 Pole pair number Pole pitch [mm]
Length of the signal period [mm]
--------------------------------------------------------------------------------------------
=
