Electric Motors

Form adjectives and adverbs. Translate them into Russian.

B) Cover the left column and translate the Russian words back into

A) Cover the right column and read the English words. Translate them into Russian and check your translation.

English.
condition	[kan'dijn]	условие
plant	[plaint]	завод
pole		полюс
torque	[to:k]	вращение, момент вращения
poor	[риэ]	бедный, плохой
nameplate	['neimpleit]	(заводская) табличка

2. Read the words and put down their Russian equivalents. Then trans­late them back into English.

industry service transport motor

ftndastn] I'sa^is] [traenspo:t] I'moutal

-IB

['praektikal] practical [pou'tenjbl] potential

3. Give the Russian for:

magnet pole ____________________________________________

different conduit____________________________________________

machine ratings_____________________________________________

rated torque ' ________________________________________

service life_________________________________________________

poor operation ____________________________________________

a. care-careful______________________________________________

use-____________________________________________________

power-__________________________________________________

b. care - careless_____________________________________________

use-____________________________________________________

power-___________________________ '_ ______________________

wire -___________________________________________________

с normal - normally__________________________________________

practical -________________________________________________

potential-________________________________________________

abnormal-_______________________________________________

poor-___________________________________________________

5. Answer these questions:

1. What types of magnets are used in heavy industry?

2. How long is motors' service life under normal conditions?

3. Are motors used in every branch of industry?

4. What are the main types of motors in use nowadays?

Motors are used for converting different forms of energy into me­chanical energy.

The main part of a motor is a coil or armature. The armature is placed between the poles of a powerful magnet. When a motor is put

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into operation current starts flowing through the coil (armature) and the armature starts rotating.

Electric motors are used practically in every branch of industry, transport, and agriculture. Naturally, they are produced in many dif­ferent designs. They are used in industrial plants, and operate under dif­ferent conditions.

Each motor is supplied with a nameplate which bears machine ratings: output power, voltage, the rated current, the starting current, the power factor, the efficiency, and the rated torque.

These motor ratings should be taken into consideration since they are necessary for the users. On them depends the length of motors' service life, which is normally equal to about 10 years, provided that the operating conditions are normal. Naturally, under abnormal condi­tions the service life becomes much shorter: motors operate poorly and may have different faults.

6. Complete the sentences using the correct variant:

1. Motors are used _a) for transmitting energy.

b) for converting energy.

2. Motor's main part is a) the frame.

b) the armature.

c) the stator.

3. The armature is placed a) between the poles of the magnet.

b) about the poles of the magnet.

4. Motors' service life becomes a) under normal conditions, shorter b) under abnormal conditions.

5. Faulty motors operate a) normally.

b) poorly.

7. Answer these questions. Use them in a talk with your groupmate:

1. What are motors used for?

2. What is the motor's main part?

3. Where is the armature placed?

4. What ratings does the nameplate of a motor bear?

5. Under what conditions does a motor operate normally (poorly)?

g. Read about energy resources of today. Write three questions about the text and ask your groupmate to answer them.

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