The Mechanical Engineering of Collieries by T. Campbell Futers

Author:T. Campbell Futers
Language: eng
Format: epub, pdf
Publisher: The Colliery Guardian Co ., Limited
Published: 1905-03-25T05:00:00+00:00

Fig. 500.— General Arrangement of Winding Tower.

Pio. 501.— Vertical Section of Winding Grab..

Fio. 502.—Binu Sw.

The electrical equipment is somewhat novel, inasmuch as the current supplied from the generating current is continuous current, and is, so to speak, applied to the driving motors direct, but through what is termed a " buffer " set shown in fig. 502; A being the starting dynamo, P the buffer motor, S a heavy flywheel, and Z a small " boosting " dynamo for regulating the total voltage applied to the terminals of the buffer motor. The diagram of connections for these machines is shown in fig. 503, FBI being the winding motors, from which it will be seen the starting dynamo AM and the winding motors FM are in series with the line, the excitation current of the field coils of the dynamo AM being controlled by the regulator R,; R 1 being an automatic regulator controlling the excitation of the booster Z.

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