Lesson 10 Sabilized Power Supply 電子技術專業(yè)英語教.ppt

1、Lesson 10 Sabilized Power Supply 電子技術專業(yè)英語教程馮新宇 主編 電子工業(yè)出版社 ,Unit 4 Power,2020/10/10,電子技術專業(yè)英語教程,2,Lesson 10 Sabilized Power Supply,Backgrounds Text tour Language in use Vocabulary Structure Reading/writing techniques,2020/10/10,電子技術專業(yè)英語教程,3,Terminology,Backgrounds,2020/10/10,電子技術專業(yè)英語教程,4,Terminology,a

2、utotransformer 自耦變壓器 servomechanism 伺服 sinewave 正弦波 distortion 失真 ferroresonant 鐵磁諧振 stabilized power supply 穩(wěn)壓電源 mobile Phone power adaptors手機電源適配器 saturating transformer飽和變壓器,2020/10/10,電子技術專業(yè)英語教程,5,Terminology,surge suppressors激增抑制器 shortcircuit protections短路保護 peak current峰值電流 zener diode齊納二極管 a

3、valanche breakdown diode 雪崩擊穿二極管 THD 總濾波失真,2020/10/10,電子技術專業(yè)英語教程,6,autotransformer,An autotransformer (sometimes called autoformer)is an electrical transformer with only one winding. The winding has at least three electrical connection points called taps. The voltage source and the load are each con

4、nected to two taps. One tap at the end of the winding is a common connection to both circuits (source and load). Each tap corresponds to a different source or load voltage. In an autotransformer a portion of the same winding acts as part of both the primary and secondary winding.,2020/10/10,電子技術專業(yè)英語

5、教程,7,surge suppressor,A surge protector (or surge suppressor) is an appliance designed to protect electrical devices from voltage spikes. A surge protector attempts to regulate the voltage supplied to an electric device by either blocking or by shorting to ground voltages above a safe threshold. The

6、 following text discusses specifications and components relevant only to the type of protector that diverts (shorts) a voltage spike to ground.,2020/10/10,電子技術專業(yè)英語教程,8,servomechanism,A servomechanism, or servo is an automatic device that uses error-sensing feedback to correct the performance of a me

7、chanism. 伺服是一種使用誤差反饋來糾正作用機制中的性能.,2020/10/10,電子技術專業(yè)英語教程,9,THD,The total harmonic distortion, or THD, of a signal is a measurement of the harmonic distortion present and is defined as the ratio of the sum of the powers of all harmonic components to the power of the Fundamental frequency. Lesser THD al

8、lows the components in a loudspeaker, amplifier or microphone or other equipment to produce a more accurate reproduction by reducing harmonics added by electronics and audio media.,2020/10/10,電子技術專業(yè)英語教程,10,Animation of harmonics,2020/10/10,電子技術專業(yè)英語教程,11,Outline Brief introduction (para.1-2) AC volta

9、ge stabilizers (para.3-9 ) DC voltage stabilizers (para.10- 11),Text tour,2020/10/10,電子技術專業(yè)英語教程,12,AC voltage stabilizers,a type of household mains regulator uses a servomechanism (or negative feedback) to control the position of the tap (or wiper) of the autotransformer An alternative method is the

10、 use of a type of saturating transformer called a ferroresonant transformer or constant-voltage transformer A ferroresonant transformer can operate with an input voltage range as wide as 40% or more of the nominal voltage. Output power factor remains in the range of 0.96 or higher from half to full

11、load.,2020/10/10,電子技術專業(yè)英語教程,13,regulate the voltage using a shunt regulator supply a maximum amount of current deliver much larger currents on demand.,DC voltage stabilizers,2020/10/10,電子技術專業(yè)英語教程,14,Vocabular distortion Structure,Language in use,2020/10/10,電子技術專業(yè)英語教程,15,Vocabulary,2020/10/10,電子技術專業(yè)英

12、語教程,16,the act or an instance of distorting or the state of being distorted something that is distorted an aberration of a lens or optical system in which the magnification varies with the lateral distance from the axis an undesired change in the shape of an electromagnetic wave or signal.the result

13、 of such a change in waveform, esp a loss of clarity in radio reception or sound reproduction a change in perception so that it does not correspond to reality the disguising of the meaning of unconscious thoughts so that they may appear in consciousness,distortion in dictionary,2020/10/10,電子技術專業(yè)英語教程

14、,17,distortion in text,Because it regenerates an output voltage waveform, output distortion, which is typically less than 4%, is independent of any input voltage distortion, including notching. 因為包括多級繼電器在內(nèi)，它會再產(chǎn)生一個輸出失真的輸出電壓波形，這種失真通常小于4，且獨立于輸入電壓失真。,2020/10/10,電子技術專業(yè)英語教程,18,harmonic distortion 諧波失真 amp

15、litude distortion 振幅失真 distortion currents 畸變電流 distortion degree 失真度 segregation distortion 偏分離 linear distortion 線性失真 distortion correction 畸變校正,distortion in use,2020/10/10,電子技術專業(yè)英語教程,19,Structure,2020/10/10,電子技術專業(yè)英語教程,20,A voltage stabilizer is a type of household mains regulator which uses a co

16、ntinuously variable autotransformer to maintain an AC output that is as close to the standard or normal mains voltage as possible, under conditions of fluctuation. 電壓穩(wěn)壓器是一種民用電源調(diào)節(jié)器，它采用連續(xù)變量自耦變壓器以在電源波動的條件下保持交流輸出盡可能的接近標準或正常電壓。,2020/10/10,電子技術專業(yè)英語教程,21,這個句子的框架結構是A voltage stabilizer is a type of househol

17、d mains regulator。關系代詞which引導定語從句,其先行詞是regulator。在這個從句中又包含一個由that引導的引導定語從句,其先行詞是an AC output。,2020/10/10,電子技術專業(yè)英語教程,22,The ferroresonant transformers, which are also known as Constant Voltage Transformers (CVTs), are also good surge suppressors, as they provide high isolation and inherent shortcircu

18、it protections. 這種鐵磁共振變壓器，也可以稱為恒壓變壓器（CVTs），也是很好的振蕩抑制器，因為它可以保證良好的電絕緣和內(nèi)在的短路保護。 這個句子的框架結構是The ferroresonant transformers are also good surge suppressors。As引導原因狀語從句，意思是“因為，由于”。在主句中，關系代詞which引導定語從句,其先行詞是The ferroresonant transformers.,2020/10/10,電子技術專業(yè)英語教程,23,Reading / Writing techniques,2020/10/10,電子技術專

19、業(yè)英語教程,24,Negation,1. Full negation：It is generally expressed by “no, none of the , neither of the”, meaning 都不；均不.,普通的窗戶均承受（withstand）不了這么大的力。 None of the ordinary windows = No ordinary windows can withstand so large a force.,2020/10/10,電子技術專業(yè)英語教程,25,2. Partial negation：It is, in general, expressed

20、by “all, both, every”+ “not”，meaning 并非都.,A general-purpose programming language cannot be perfect（理想的）for all of the many tasks to which it is put. This parameter does not change during all time intervals.,2020/10/10,電子技術專業(yè)英語教程,26,3. The transfer of negation,（1）The negation of the verbs expressing

21、“belief” or a subjective judgment” in the main clause is transferred to the sub clause,not+ think/feel/suppose/believe/imagine+ that-clause,They dont think that this answer to the problem is right.,2020/10/10,電子技術專業(yè)英語教程,27,（2）The negation of appear/seem/happen is transferred to the infinitive or to

22、the subject clause.,This computer does not seem to be so good as that one. It does not appear that this value satisfies the equation.,2020/10/10,電子技術專業(yè)英語教程,28,（3） “not no, rather than, instead of” in the main clause + as-clause or as-phrase（or “the way ”）：meaning“并不像那樣”,This disease does not affect

23、most animals as it does humans. The presence of the minus sign indicates that the current of 1.5 A flows from C to F, and not from F to C as shown.,2020/10/10,電子技術專業(yè)英語教程,29,The HIGH-level output voltages for both OR and NOR are between -0.81 and -0.96 V rather than-0.8 V, as predicted by Eq. (2-9). The majority of distance communication in the future could well be computer-to-computer, not person-to-person as at present. The Maxwell relations（關系式）are n