Electrotechnics English. Unit1 Electrotechnics

Transcription

1 Electrotechnics English Unit1 Electrotechnics

2 Column A Voltage Column B U=3v Match column A with column B Inductance Capacitance Current Resistance I=8A R=2Ω C=5f L=5h Electrotechnics English 3

3 New words? Reading Dialogue Homework Electrotechnics English 4

4 electricity: the power that is carried by wires, cables etc. and is used to provide light or heat, to make machines work etc. electrical machine electrician: someone whose job is to connect or repair electrical wires or equipment Current: a flow of electricity through a wire Voltage: electrical force measured in volts Inductance Capacitance 电感电容 电流电压 Resistance: the ability of a substance to stop the flow of an electric current through it 电阻 parameter: a a set of fixed limits that control the way that something should be done 参数 Electrotechnics English 5

5 Quantity Symbol Unit of Measurement Unit Abbreviation Current I Ampere A Voltage U Volt V Resistance R Ohm Ω Inductance L Henry H Capacitance C Farad F Electrotechnics English 6

6 Multimeter Mega ohmmeter Electrotechnics English 8

7 Ammeter DC Ammeter DC Ammeter DC Ammeter DC\AC Ammeter Voltmeter DC Voltmeter DC Voltmeter DC\AC Voltmeter Electrotechnics English 9

8 Bridge Signal generator Electrotechnics English 10

9 Oscillogragh Plier Wire stripper Electrotechnics English 11

10 Screwdriver Plier Electrotechnics English 12

11 Electrician s Knife Hammer knife Desoldering tool Soldering iron Electrotechnics English 13

12 A Multimeter B Mega ohmmeter C Ammeter Bridge D E Oscillograph F Wire stripper G Soldering iron H Screwdriver I Plier J Desoldering tool Electrotechnics English 14

13 Being an electrician, we must have some fundamental knowledge about electrotechnics. The basic parameters we care for most are current, voltage, inductance, capacitance and resistance. In electrotechnical measurement, we always measurethses parameters to find out the problem. With the rapid development of science and technology, electrotechnics fast. Electrotechnics English 16

14 M: May I come in? M: Hello, my name is Mike. M: Electrician. I have been an electrician for three years. J: Come in, please. J: Sit down, please. Mike, we will have a little talk. What was your job before?. J: So why do you want to join our company? M: The company is very suitable for me. I have known it for a long time. So I want to be one of it, and be a good electrician. M: OK, thanks. See you next time. J: Good. Uh We will tell you our decision in a few days. Wait for further information, OK? J: See you. Electrotechnics English 17

15 Electrotechnics Electronics High-voltage or a large current filed low-voltage or a small current filed Electrotechnics English 18

16 MP3-the new sound of music 2003 (Translation) Are you still listening to the audiotapes? Boy, you are stuck in the '70s! Listen to the cassette tape is the original way. A CD last a lot longer than tapes. And the quality of the sound is way better than the tapes too. Last few years, there's a new form of music--mp3. It's the latest thing in digital audio technology. MP3 is a new way of compressing large audio files into much smaller size. With this new technology, you can download songs from the Internet. Many web sites have MP3 music you can download for free. An MP3 player is actually a computer that plays MP3 audio files and its sound is as good as a CD. An MP3 player can hole several CDs, so you'll have less to carry around! So, do you want to get rid of all the tapes and buy an MP3 player? NO! One day the tapes may be really valuable--as antiques! Electrotechnics English 19