motor generator

noun Electricity.
one or more motors mechanically coupled to one or more generators for converting or transforming electric current into mechanical energy.
Also called motor generator set.


Origin:
1885–90

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
motor generator
 
n
a generator driven by an electric motor, by means of which the voltage, frequency, or phases of an electrical power supply can be changed

Collins English Dictionary - Complete & Unabridged 10th Edition
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Encyclopedia Britannica
Encyclopedia

motor generator

an electric motor coupled to an electric generator to convert electric power from one from to another. The motor operates from the available electric power source, and the generator provides power of the characteristics desired for the load. For example, a set may be designed to convert commercially available alternating current to direct current, as in some welding applications; or it may provide high-frequency alternating current power for induction heating. Such a combination has been termed a dynamotor. In some sets, there may be more than one coupled generator. Motor generator is also used to denote an electric generator and a driving motor, such as a gasoline or diesel engine.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Check main breakers in all four motor generator sets.
Motor generator sets and dispatching systems will be replaced.
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