Delta Tau GEO MACRO DRIVE User Manual download pdf (Page 104)

Geo MACRO Drive User Manual

92 Setting Up Turbo Motor Operation

64*

360

360%HEZ

Offset =

The offset computed here should be rounded to the nearest integer.

In the example, this comes to:

hex $0B11667.1064

360

360%

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

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.

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Delta Tau GEO MACRO DRIVE User Manual Page 104

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