Lesson 10 Sabilized Power Supply 电子技术专业英语教.ppt

1、Lesson 10 Sabilized Power Supply 电子技术专业英语教程冯新宇 主编 电子工业出版社 ,Unit 4 Power,2020/10/10,电子技术专业英语教程,2,Lesson 10 Sabilized Power Supply,Backgrounds Text tour Language in use Vocabulary Structure Reading/writing techniques,2020/10/10,电子技术专业英语教程,3,Terminology,Backgrounds,2020/10/10,电子技术专业英语教程,4,Terminology,a

2、utotransformer 自耦变压器 servomechanism 伺服 sinewave 正弦波 distortion 失真 ferroresonant 铁磁谐振 stabilized power supply 稳压电源 mobile Phone power adaptors手机电源适配器 saturating transformer饱和变压器,2020/10/10,电子技术专业英语教程,5,Terminology,surge suppressors激增抑制器 shortcircuit protections短路保护 peak current峰值电流 zener diode齐纳二极管 a

3、valanche breakdown diode 雪崩击穿二极管 THD 总滤波失真,2020/10/10,电子技术专业英语教程,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,电子技术专业英语

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,电子技术专业英语教程,8,servomechanism,A servomechanism, or servo is an automatic device that uses error-sensing feedback to correct the performance of a me

7、chanism. 伺服是一种使用误差反馈来纠正作用机制中的性能.,2020/10/10,电子技术专业英语教程,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,电子技术专业英语教程,10,Animation of harmonics,2020/10/10,电子技术专业英语教程,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,电子技术专业英语教程,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,电子技术专业英语教程,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,电子技术专业英语教程,14,Vocabular distortion Structure,Language in use,2020/10/10,电子技术专业英语教程,15,Vocabulary,2020/10/10,电子技术专业英

12、语教程,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,电子技术专业英语教程

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. 因为包括多级继电器在内，它会再产生一个输出失真的输出电压波形，这种失真通常小于4，且独立于输入电压失真。,2020/10/10,电子技术专业英语教程,18,harmonic distortion 谐波失真 amp

15、litude distortion 振幅失真 distortion currents 畸变电流 distortion degree 失真度 segregation distortion 偏分离 linear distortion 线性失真 distortion correction 畸变校正,distortion in use,2020/10/10,电子技术专业英语教程,19,Structure,2020/10/10,电子技术专业英语教程,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. 电压稳压器是一种民用电源调节器，它采用连续变量自耦变压器以在电源波动的条件下保持交流输出尽可能的接近标准或正常电压。,2020/10/10,电子技术专业英语教程,21,这个句子的框架结构是A voltage stabilizer is a type of househol

17、d mains regulator。关系代词which引导定语从句,其先行词是regulator。在这个从句中又包含一个由that引导的引导定语从句,其先行词是an AC output。,2020/10/10,电子技术专业英语教程,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. 这种铁磁共振变压器，也可以称为恒压变压器（CVTs），也是很好的振荡抑制器，因为它可以保证良好的电绝缘和内在的短路保护。 这个句子的框架结构是The ferroresonant transformers are also good surge suppressors。As引导原因状语从句，意思是“因为，由于”。在主句中，关系代词which引导定语从句,其先行词是The ferroresonant transformers.,2020/10/10,电子技术专业英语教程,23,Reading / Writing techniques,2020/10/10,电子技术专

19、业英语教程,24,Negation,1. Full negation：It is generally expressed by “no, none of the , neither of the”, meaning 都不；均不.,普通的窗户均承受（withstand）不了这么大的力。 None of the ordinary windows = No ordinary windows can withstand so large a force.,2020/10/10,电子技术专业英语教程,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,电子技术专业英语教程,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,电子技术专业英语教程,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,电子技术专业英语教程,28,（3） “not no, rather than, instead of” in the main clause + as-clause or as-phrase（or “the way ”）：meaning“并不像那样”,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,电子技术专业英语教程,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（关系式）are n