Delta Tau GEO PMAC User Manual
Geo PMAC Drive User Manual
Setting Up Encoders
67
Determining the Polarity of the Hall Effects – Standard or Reversed
The polarity of the Hall Effects can be determined from the chart recorded in the previous section in the
Current Loop 6-step procedure. The polarity depends on how the motor leads were connected with
respect to the encoder direction as well as how it was wired in the hall effects with respect to the electrical
cycle (in other words the U and V wires were swapped).
Current Loop 6-step procedure. The polarity depends on how the motor leads were connected with
respect to the encoder direction as well as how it was wired in the hall effects with respect to the electrical
cycle (in other words the U and V wires were swapped).
Standard Polarity – if the current loop 6-step is being executed in the positive direction of the electrical
cycle (from –30 to 30, 90, 150,-150, -90, -30 or 0 to 60, 120, 180, -120, -60,0), the system is considered
to have a standard Hall Effect polarity if the transition of V at the Hall Effect Zero is from 0 to 1.
cycle (from –30 to 30, 90, 150,-150, -90, -30 or 0 to 60, 120, 180, -120, -60,0), the system is considered
to have a standard Hall Effect polarity if the transition of V at the Hall Effect Zero is from 0 to 1.
Reversed Polarity - if the current loop 6-step is being executed in the positive direction of the electrical
cycle (from –30 to 30, 90, 150, -150, -90, -30 or 0 to 60, 120, 180, -120, -60,0), the system is considered
to have a reversed Hall Effect polarity if the transition of V at the Hall Effect Zero is from 1 to 0.
cycle (from –30 to 30, 90, 150, -150, -90, -30 or 0 to 60, 120, 180, -120, -60,0), the system is considered
to have a reversed Hall Effect polarity if the transition of V at the Hall Effect Zero is from 1 to 0.
Refer to the chart below as an example:
An easy method to determine if the hall effects are standard or reversed (setting bit 22 for Ix81) would be
to look at the data in columns.
An easy method to determine if the hall effects are standard or reversed (setting bit 22 for Ix81) would be
to look at the data in columns.
Ix79 Ix29
Electrical
Cycle
U
V
W
3000 -1500 -30 0
1
0
1500 -3000 -90 1
1
0
-1500 -1500 -150 1
0 0
-3000 1500 150 1
0 1
-1500 3000 90 0
0 1
1500 1500 30 0
1 1
3000 -1500 -30 0
1 0
Positive
The HEZ occurs at 60
° electrical. If the
transition of V from 0 to 1 at the HEZ point
is in the negative direction (like this
example), then the hall effect sensing would
be considered reversed. If the transition of
V from 0 to 1 at the HEZ is in the positive
direction, then the hall effect sensing would
be considered standard.
is in the negative direction (like this
example), then the hall effect sensing would
be considered reversed. If the transition of
V from 0 to 1 at the HEZ is in the positive
direction, then the hall effect sensing would
be considered standard.
Record whether the Hall Effects are setup as standard or reversed and move on to the next step of setting
up the Controller setup parameters for Hall Effect Power on Phasing.
up the Controller setup parameters for Hall Effect Power on Phasing.
Software Settings for Hall Effect Phasing
The variable used for Hall Effect Phasing is Ix81. This variable is the Power on-phasing setup register.
To enable a Hall Effect Phasing on power up, configure Ix81 properly and then enable the power on
feature by setting Ix80=1. The default of Ix80 is 0 and then a phasing search will be activated only by the
$ command. It is recommended that the phasing search is set up and tested with the aid of this document
and verified through the $ command before enabling the power on phasing routine with Ix80.
To enable a Hall Effect Phasing on power up, configure Ix81 properly and then enable the power on
feature by setting Ix80=1. The default of Ix80 is 0 and then a phasing search will be activated only by the
$ command. It is recommended that the phasing search is set up and tested with the aid of this document
and verified through the $ command before enabling the power on phasing routine with Ix80.
Note:
If Ix73 and Ix74 have a value greater than zero, then the automatic hall phasing
routines will not work. Ix73 and Ix74 are used for the automatic step phase
method.
routines will not work. Ix73 and Ix74 are used for the automatic step phase
method.
Software Setup
Hall Effect Phasing on Geo PMACs is set up through Ix81. Ixx81 contains address information for the
Hall Effect Data as well the phasing mode, HEZ and polarity information of the Hall Effect Sensors.
Hall Effect Data as well the phasing mode, HEZ and polarity information of the Hall Effect Sensors.