Creating Custom Motor Files
B-3
Installation Manual for Models ODM-005, ODM-005i, ODM-010, ODM-010i, ODM-020 and ODM-020i
The relationship of the Hall signals to the back-EMF signals is not important at this stage. However, the
sequencing of the back-EMF signals must conform to Figure B.2(a), and the sequencing of the Hall
feedback signals must conform to Figure B.2(b).
Many motor manufacturers include drawings in their data sheets that identify the phasing of the back-
EMF and Hall feedback signals, or an application engineer may have access to an internal document
listing the information. As a last resort, the motor can be rotated in the lab to check the phasing.
If the phasing is not correct, the respective leads must be physically swapped to correct the sequencing.
A custom motor file cannot be created until the sequencing is correct because the offset of the Hall signals
from the Thomson Industries standard must be defined, and swapping wires affects the offset value.
Intro
F
IGURE
B.1
Thomson Industries Motor Naming Convention
Intro
Intro
Intro
(a) Required Back-EMF Phasing
(b) Required Hall Feedback Phasing
F
IGURE
B.2
Required Back-EMF and Hall Signal Phasing for Clockwise Rotation
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