Electrotechnical Systems

150 Electrotechnical Systems

are shown in Figure 4.67. At that point, b = 0.002, THD = 1.24% for I

load

under its

peak value of 100 A. If zero states are not used, THD = 1.6%. The phase inverter volt-

ages with and without use of zero state are shown in Figure 4.68a and b, respectively.

It is seen that the phase voltage reverse is practically excluded in the latter case.

In conclusion, it is worth mentioning that simulation of the resonant inverters,

because of the big oscillation frequency and of the abrupt signal change, has

I

load

(A)

t (s)

100

–100

0

0 0.02 0.04 0.06 0.08 0.1

0.0499

U

c

(V), I

L

(A)

U

c

I

L

400

200

0

–200

–400

0.05

U

cl

(V)

t (s)

510

500

490

0.0499

0.05 ...