Invention Grant
- Patent Title: Normalization of motor phase measurements
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Application No.: US15250337Application Date: 2016-08-29
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Publication No.: US09912275B2Publication Date: 2018-03-06
- Inventor: Eric James Thomas , David Patrick Magee
- Applicant: TEXAS INSTRUMENTS INCORPORATED
- Applicant Address: US TX Dallas
- Assignee: TEXAS INSTRUMENTS INCORPORATED
- Current Assignee: TEXAS INSTRUMENTS INCORPORATED
- Current Assignee Address: US TX Dallas
- Agent John R. Pessetto; Charles A. Brill; Frank D. Cimino
- Main IPC: H02P21/00
- IPC: H02P21/00 ; H02P21/18 ; H02P21/06 ; H02P21/24 ; H02P25/03 ; H02P25/08 ; H02P27/08

Abstract:
A method of normalizing phase measurements for a motor using a normalizing phase measurements (NPM) algorithm that a processor implements to cause a motor controller coupled to stator terminals of the phases to execute forcing a set of input current or voltage vectors (set of input vectors) including repeating the forcing after rotating the rotor through a full mechanical cycle to generate resulting current or voltage samples (resulting samples) of non-normalized phase A and phase B waveforms. The magnitude of the input vectors are sufficiently small to not move the rotor. A maximum value (x_max) and a minimum value (x_min) are determined for each of the non-normalized phase A and phase B waveforms. An offset value and normalization scale factor (NSF) are determined from the max and min values. The offsets and NSFs are applied to the non-normalized phase waveforms to generate normalized phase A and phase B waveforms.
Public/Granted literature
- US20160373042A1 NORMALIZATION OF MOTOR PHASE MEASUREMENTS Public/Granted day:2016-12-22
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