V Scan the text and decide whether the following sentences are true or false. Discuss them with your partner.
1 A brush-typeac generatorconsists of an ac generatoronly. 2 The output of thegenerator supplies ac to the engine. 3 The only purpose forthe dc exciter generator is to supply the acrequired to maintain the dc generator field. 4 The exciter is ac, shunt-wound, self-excitedgenerator. 5 The exciter field creates an area ofintense magnetic flux between its poles. 6 When theexciter armature rotates in the exciter-field flux,voltage is induced in the exciter armature windings. 7 The output from the exciter commutator flowsover brushes and slip rings to the generator field. 8Being dc, already converted by the exciter commutator,the current always flows in one direction through thegenerator field. 9Thus, a fixed-polarity magneticfield is maintained in the generator field windings. 10When the field winding rotates, its magnetic fluxdoesn`t passthrough and across the generator armature windings. 11The ac in the ac generator armature windings flowsthrough fixed terminals to the ac load. 12The stationary member of the generator consists ofthe ac armature only. 13 Both ac and exciter terminal boards are easily accessible. 14 All brushrigging is on the generator and doesn`t have a brush cover. 15 Theslotted-hole mounting doesn`t provide for ease in attaching tothe engine pad.
|
