Electric transmission of energy and its transformation, subdivision, and distribution. A practical handbook (1894)
Kapp, Gisbert, 1852-1922 · New York, Van Nostrand · leaf 202
onstant resistance, as in the present case, thereexists a critical speed at which it will begin to give acurrent of some strength. Below that speed it giveshardly any current, and above that speed it gives almostat once the full current. The motor should be so gearedas to run at the critical sjoeed… … below its critical speed. The dynamo will thus partly orentirely lose its current and the demagnetizing influencewhich previously has kept the field below its full strength,will to a greater or lesser degree be withdrawn. Thestrength of the field will thus be increased, and anadditional magnetic…
Electric power production
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