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electronic cir ترجمه به انگلیسی translated to english

    Getting Started

    1. Getting Started

    To highlight the importance of electrical engineering knowledge retention is necessary to evening the most used form of energy is electricity in different areas. Currently, toatesectoarele activity is used, in various ways, electricity. Deacţionare motors of various tools, machinery and transport equipment converts electrical energy into energiemecanică, electric lamps converts light into energy, electric ovens transforms it into energietermica (heat) to melt, heated or dried. If we consider the use of electricity întelecomunicaţii in automation, home appliances, resulting in the vast field of energy aceastăformă finds its use.

    1.1. A classification of electrical quantities

    a) After the presence or absence of their energy: active Size: sizes are those associated with energy, some of which can be used for measuring înprocesul. The ratio between the total energy, which has the size and power that folosităpentru measurement should be large so as not to affect the value of assets size măsurate.Exemplu sizes: temperature, voltage, electrical current, passive putereaelectrică.Mărimi : are those quantities which possesses its own energy liberia. For their measurement is necessary to resort to an auxiliary power source. Size Examples passive resistance, capacity, inductance, etcb) After-dimensional appearance space: scalars: completely determined by a single vector număr.Mărimi: characterized by: mode (intensity) and direction sens.c) After how variation over time:

     

     

    MărimeaelectricăConstantă VariabilăDeterministăAleatoareNe eriodicăPeriodicăSinusoidală (aperiodic AlternativăPulsatorie

    Fig.1.1. Classification quantities measured by how timpMărimea variaţieîn constant: it is the size which changes its value over time, with only two parameters, amplitude and deterministic polaritate.Mărimea: is that size whose evolution over time is predictable and can be descrisăprintr a mathematical function and that unpredictability comes in a small random măsură.Mărimea: unpredictable variation, the values ​​they take different time points fiindîntâmplătoare. These sizes can not be characterized only in probabilistic sense using methods statistice.5


     

    Getting Started

    The mean (DC component) of random sizes within a certain time t

    1

    -T

    2

    is given by (1.2) and the actual value of the relationship (1.3).

    x (t)) tt (1 = X

    TTM is d

    -

    21

    12

    (1.2)

    (T) d

    21

    12

    x) tt (1 = X

    2tte f

    -

    (1.3) where t

    2

    -T

    1

    is the integration time or measurement time.

    x (t) tX

    med

    Fig.1.2. Regular aleatoareMărimea size: has the property that the values ​​they take at certain times, repeat dupăintervale equal time. Thus for a regular size, value instantaneous (momentary), x (t), satisfies the relation:

    () ()

    Ttxtx

    ± =

    (1.4) where T is the period and f = 1 / T is frecvenţa.Mărimea periodic in time can be described as a function of amplitude, frequency, period and frequency fază.Analiza in these sizes is done using Fourier series, resulting discret.Valoarea defrecvente spectrum average (DC component) of a regular size is:

    x (t) T1 = X

    T + TTM e d

    0

    0

    (1.5) Another parameter used to characterize periodic quantities is the actual value:

    (T) d

    0

    XT1 = X

    2Ttte f

    0

    +

    (1.6) 6



     

    Getting Started

    1.1.Să application determine the average value and the actual value of the periodic signal of Fig.1.3.

     

    Tax (t)

    τ

     T

    Fig.1.3. Signal dreptungiular alternative size:

     

    is the regular size which averaged over a period is zero. The electrical maiîntâlnite alternative sizes are shown in Fig.1.4.

     

    b) square wave) sine wave c) triangular wave d) sawtooth wave egalearii areas egalearii equal egalearii

    Fig.1.4. AlternativeFaţă main waveform and DC voltage, whose values ​​are generally stable over time, tensiuneaalternativă alternate polarity (Fig.1.4) and alternating current alternating in direction (Fig.1.5).

     a) b)

    Fig.1.5. DC (a) and AC (b) One way to express the intensity or magnitude of a quantity alternative is to measure

    peak

    or

    peak to peak value

    (Fig.1.6).

    X

    max

     

    X

    VV

    = 2Xmax

     

    Time

     

    Fig.1.6. Maximum and peak to peak value of a quantity alternativeDin Unfortunately each of these values ​​can mislead us if we compare two different wavelengths. Thus, otensiune rectangular 10V peak value is clearly higher than the value for a voltage of 10V devârf triangular effect of these two voltages that supply the same pregnancy fiinddiferit (Fig.1.7) .7


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    برچسب ها : size ,value ,time ,energy ,sizes ,that ,over time ,regular size ,peak value ,actual value ,​​they take ,
    electronic cir ترجمه به انگلیسی translated to english

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