Lesson 21 Marine Electrical System

Contents

Basic Knowledge of Current Alternating Current Generator The Alternator Construction

Specifications (1)Specifications (1)

magnetic 磁性的 conductor 导体 stationary 静止的

connected with or produced by magnetism

a substance that allows electricity or heat to pass along it or through it

not moving; not intended to be moved

Specifications (2)Specifications (2)

amplifier 放大器 fluctuation 波动 eliminate 消除

an electrical device or piece of equipment that makes sounds or radio signals louder

an irregular rising and falling in number or amount; a variation

to remove or get rid of something/somebody

The Alternator Construction

Electrical Grounding

Electrical Elements

Special Terms (I)

1. 滑环2. 极3. 电磁铁4. 极性5. 电枢6. 励磁机7. 静止8. 无电刷9. 抵消

slipring

pole

electromagnet

polarity

armature

exciter

statically

brushless

counter

Special Terms (II)

10. 余弦11. 乘积12. 电感的13. 电容性的14. 滞后15. 超前16. 励磁17. 放大器18. 部件

cosine

product

inductive

capacitive

lagging

leading

excitation

amplifier

feature

Special Terms (III)

19. 震荡20. 过调21. 变压器22. 整流器23. 并激

hunting

overcorrecting

transformer

rectifiershunt

Useful Expressions

field coil

star formation

power factor

prime mover

series excitation

励磁线圈星型接法功率因数原动机串激

Assignment

1. Exercise II: 1-10

2. Reading comprehension

3. Summarize the text in your own words