SPACE VECTOR PWM INVERTER
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 seminar flower Super Moderator Posts: 10,120 Joined: Apr 2012 18-07-2012, 04:33 PM SPACE VECTOR PWM INVERTER   SPACE VECTOR PWM INVERTER.pdf (Size: 457.17 KB / Downloads: 106) Principle of Space Vector PWM The circuit model of a typical three-phase voltage source PWM inverter is shown in Fig. 4. S1 to S6 are the six power switches that shape the output, which are controlled by the switching variables a, a′, b, b′, c and c′. When an upper transistor is switched on, i.e., when a, b or c is 1, the corresponding lower transistor is switched off, i.e., the corresponding a′, b′ or c′ is 0. Therefore, the on and off states of the upper transistors S1, S3 and S5 can be used to determine the output voltage. As illustrated in Fig. 4, there are eight possible combinations of on and off patterns for the three upper power switches. The on and off states of the lower power devices are opposite to the upper one and so are easily determined once the states of the upper power transistors are determined. According to equations (2.1) and (2.2), the eight switching vectors, output line to neutral voltage (phase voltage), and output line-to-line voltages in terms of DC-link Vdc, are given in Table1 and Fig. 5 shows the eight inverter voltage vectors (V0 to V7). Simulation Steps 1). Initialize system parameters using Matlab 2). Build Simulink Model