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Method of Sequencing Stepper Motor Phases

IP.com Disclosure Number: IPCOM000050859D
Original Publication Date: 1982-Dec-01
Included in the Prior Art Database: 2005-Feb-10

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Fitch, DG Mahlbacher, PA [+details]


In a stepper motor system, the rotor is moved by energizing the stator windings in a defined sequence. The phase sequencer function of a stepper motor controller determines or specifies what phase combination is required to achieve the next incremental motion. A very efficient method of realizing a phase sequence or function is disclosed. For example purposes only, a three-phase, half-step stepping motor sequence is assumed. The phase sequence for such an example is illustrated in Fig. 1.