The invention relates to a switched reluctance machine
based start/generator system utilizing fixed-angle current
regulated generator control. Appellants disclose on page 8 of
the specification that Figure 1 illustrates a switched
reluctance machine 10 having a rotor (not shown) drivably
coupled by shaft means 12 to a turbine engine 14. On page 10
of the specification, Appellants disclose that Figure 3 shows
the switch reluctance machine phase winding 44 in series with
two switches 46 and 48. As the switches 46 and 48 are gated,
current flows from the dc distribution bus 20 to energize the
winding 44. When the switches 46 and 48 are not gated,
disconnected, the current is forced to flow through the cross-
coupled diodes 50 and 52 to the dc distribution bus 20. On
page 17 of the specification, Appellants disclose that the
switches 46 and 48 are gated at a fixed angle, approximately
40 electrical degrees before alignment of the stator pole as
shown in Figure 2. Appellants refer to this angle as the
turn-on angle. Appellants further disclose that the switches
46 and 48 are disconnected at a fixed angle, at approximately
120 electrical degrees after alignment. Appellants refer to
this angle as the turn-off angle. Appellants disclose on
3
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Last modified: November 3, 2007