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Title: |
1895 Article-Thomson-Houston Electric Co., 15 HP Electric Motor |
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Source: |
Modern Mechanism 1895 pg 545 |
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Insert Date: |
10/11/2011 7:26:53 PM |
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The Thomson-Houston stationary motor, shown in Fig. 18. is made in different sizes, from 1 to 15 horse-power. The proportioning is such that, supplied with a constant potential, they are practically self-regulating as regards speed, though the load be varied from nothing up to full power, or the reverse. At the same time the brushes on the commutator run without spark, and arc not shifted in position during extreme changes of load on the motor. In other words, the non-sparking points of the commutator remain at one position without change. As will be noted in Fig. 18, the poles of the field magnets—the bodies or cores of which are round in section—project upward and enclose the armature, the section of the core of which is nearly square. The winding of the armature is a modified Siemens arrangement, and the field magnet coils are in shunt to the armature. The armature core is so well laminated, and the resistance of the armature Conductor is so low, that loss by Foucault currents, or local currents in the iron, and by internal resistance, is very light as compared with the output of the machine. |
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1895 Thomson-Houston Electric Co., Electric Motor
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