| 摘要 |
A direct current rotary apparatus of the type disclosed in U.S. Pat. No. 3,631,273, of which the present disclosure is a continuation-in-part, the improvement comprising a commutator switch having two arcuate blades, mounted for rotation with the rotor and evenly spaced thereon, and stationary segments connected to the stator coils. The segments are of like angular width and arranged in a circle for contact by the rotating blades which have an angular width approaching, but not greater than, 180 DEG less the angular width of one of the segments. Thus, the stator coils are excited at all times except the relatively short time each blade contacts only one segment, when switching occurs.
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