US 9,813,006 B2
Method for reliable control of high rotor pole switched reluctance machine
Mahesh Krishnamurthy, Wheaton, IL (US); and Trevor Creary, San Jose, CA (US)
Assigned to Software Motor Corporation, Sunnyvale, CA (US)
Filed by Software Motor Corporation, Sunnyvale, CA (US)
Filed on Jan. 23, 2017, as Appl. No. 15/413,007.
Application 15/413,007 is a continuation of application No. 15/016,084, filed on Feb. 4, 2016, granted, now 9,553,538.
Claims priority of provisional application 62/111,781, filed on Feb. 4, 2015.
Prior Publication US 2017/0133967 A1, May 11, 2017
Int. Cl. H02P 25/08 (2016.01); H02P 25/089 (2016.01); H02P 6/185 (2016.01)
CPC H02P 25/089 (2016.02) [H02P 6/185 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A sensorless reliable control system for a high rotor pole switched reluctance machine (HRSRM) having a rotor and a stator with a plurality of stator phases each having a winding, the reliable control system comprising:
a stator phase energizing module to excite at least one of the plurality of stator phases, wherein each of the windings of the rest of the plurality of stator phases is in an open circuit state;
a first current and time measuring module to measure a first current value through the at least one energized stator phase and time taken by the first current value to reach a first peak value of current;
a self-inductance determining module to determine a self-inductance value for the at least one energized stator phase;
a first storage module to store the self-inductance value and the first current value for each of the plurality of stator phases;
a second current and time measuring module to measure a second current value through an adjacent un-energized stator phase and time taken by the adjacent un-energized stator phase to reach a second peak value of current, wherein the winding of the adjacent un-energized stator phase is in an open circuit state;
a mutual-inductance determining module to determine a mutual inductance value between the at least one energized stator phase and the adjacent un-energized stator phase; and
a second storage module to store the mutual inductance value and the second current value for each of the plurality of stator phases.