Invention Application
- Patent Title: NORMALIZATION OF MOTOR PHASE MEASUREMENTS
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Application No.: US14721823Application Date: 2015-05-26
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Publication No.: US20160087567A1Publication Date: 2016-03-24
- Inventor: ERIC JAMES THOMAS , DAVID PATRICK MAGEE
- Applicant: Texas Instruments Incorporated
- Main IPC: H02P21/06
- IPC: H02P21/06

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
- US09431945B2 Normalization of motor phase measurements Public/Granted day:2016-08-30
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