Example 1: If 0=4v2 cos\tV, Z=2/600Q2 Find p(t)and P. Solution:

Example 2: Find the three inductance appearing in the T equivalent of the transformer shown in Fig., if L2=4H and the input inductance at A-B is 6H with C-D open-circuited, and 2H with C-D short-circuited

We define the unit impulse as a function of time which is zero when its argument, generally (t-o), is less than zero; which is also zero when argument is greater than zero; which is infinite when its argument is zero; and which has unit area

14-6 Effective values and power The effective or rms value of the function f(t) is

S14-2 Exponential Fourier series f(t)=+ cosot+a2 cos 2ot+.] sinot+ b2 sin

The readings of three watt-meters Ax =v an+lnx vBx=vbn+lnx vc=von+v Nx (UANia tUBvibB+Uvicdt+l(uN(ia tibB +ic)dt T Jo aNaA foBNLbB +Uvic)dt The sum of the average powers taking by the three-phase loads

We assume=Im cos(t+a)i=Im cos(ot+B) The phase angle by which the voltage leads

The forced response The steady state responseThe(t) has been switched into the circuit at some remote U.=V. cos ot time in the past, and the natural response has died-out completely. The forced response(steady state response)must satisfy the differential equation

Let us assume a solution i(t=Ae, where a and S, are constant to be determined

偶合器由泵轮和涡轮组成,同时有一旋转外壳以防止 工作液体在传动过程中散掉。 1.有内环的偶合器(结构简图)(教材图2-1-2-3) 泵轮涡轮T 叶轮由外环、内环和叶片组成。通常叶片为直叶片。 叶片流道空间和外环、内环的导流内表面组成工作腔。 工作腔轴面投影对轴心线上下对称,则常以轴心线的上半部表示