teaches in column 3, lines 19-59, that Figure 1 shows a
conventional
switched reluctance machine drive configuration. In
particular, Stephens discloses that Figure 1 shows SRM 10 as a
three-phase
machine with its associated power invertors 12. The invertors
12 switch each phase windings 28, 30 and 32 by current
switching devices (33 and 36), (34 and 37) and (35 and 38),
respectively. Stephens discloses in column 3, lines 60,
through column 4, line 12, that the current regulation means
51 receives phase current feedback signals and a Iref.
Stephens further discloses that control means 50 provides a
command reference current waveform IREF to current regulation
means 51 and outputs firing signals to inverter 12 for
energizing the machine phase winding in a predetermined
sequence. Stephens discloses that the control means 50 is
described in U.S. Pat. No. 4,739,240, hereinafter referenced
as MacMinn.
Turning to MacMinn, we note that MacMinn teaches that the
control means in column 2, lines 55-66, include a memory which
stores a plurality of standard multiphase firing patterns.
11
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Last modified: November 3, 2007