Electrotechnical Systems

227Electric Machine and Electric Drive Simulation

Pulses1 takes four switch-control signals from either the subsystem Compare or the

subsystem Tables and transforms them in the direct and inverse gate signals. Besides,

the subsystem Phase_Control has the circuits for forming the signal dU

c

according to

Figure 5.61 and the circuits for any specic PWM variant to be chosen. For this aim,

Switch2 and the tumbler Switch1 are used. If the latter is in the lower position and

the constant Contr_Mode =1, the rst PWM variant is realized, and if this constant is

0, the second variant (with capacitor voltage balancing) is realized. When the tumbler

Switch1 is in the upper position, the system operates in the following way: When the

capacitor voltage ...