Voltage source inverter

A design optimization tool is developed for a three-phase voltage source inverter (VSI) with diode frontend rectifier. The insulated gate bipolar transistor (IGBT)-based pulsewidth modulation (PWM) voltage source inverter with diode front-end rectifier has become the converter of choice for three-phase ac-fed general-purpose industrial motor drives. The converter power stage, which mainly consists of the front-end rectifier, the inverter, the dc link capacitor, the harmonic and electromagnetic interference (EMI) filter, and the thermal management system, as shown in Figure 1 with a motor load, is the primary contributor to the overall converter cost and size. Since there are interdependencies and tradeoffs among components or subsystems in the power converter, it is very desirable to have a systematic methodology and tool for achieving a cost-optimized or size-optimized converter design while meeting the system performance requirement. A design tool will also reduce the development cycle and effort.