Delta Tau Geo MACRO, User Manual And Reference Manual

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Geo MACRO Drive User Manual
92 Setting Up Turbo Motor Operation
64 *
o
o
360
360 % HEZ
Offset
=
The offset computed here should be rounded to the nearest integer.
In the example, this comes to:
hex $0B 11 667 . 10 64
o
360
o
60
64
o
o
360
360 %
o
60
Offset
= ≈ = ∗ = ∗
+
=
Find the Hall Effect Zero and record it for use in setting up Ixx91.
Hall Effect Zero
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).
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.
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.
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 Ixx91) would
be to look at the data in columns.
Ixx79 Ixx29 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.
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.
Software Settings for Hall Effect Phasing
The variables used for Hall Effect Phasing are Ixx81 and Ixx91 (Turbo). These variables are the Power
on-phasing setup registers. To enable a Hall Effect Phasing on power up, configure Ixx81/Ixx91 properly
and then enable the power on feature by setting Ixx80=1. The default of Ixx80 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 Ixx80.
Note:
If Ixx73 and Ixx74 have a value greater than zero, then the automatic hall phasing
routines will not work. Ixx73 and Ixx74 are used for the automatic step phase
method.