Abstract:
Electromagnetic interference (EMI) creates from unwanted electrical signals
emitting from a piece of electrical or electronic equipment. These signals interfere
with the operation of other equipment as well as its own operation. Recently, due to
the advancement of power semiconductor devices and power electronic techniques
the three-phase inverters are widely used in many power conversion applications.
The rapid change in voltages and currents due to switching in a three-phase
inverter, it becomes a source of EMI. The transmission of EMI is in two forms, that is
radiated and conducted. When designing three-phase inverters, a special attention
is required to reduce the EMI to an acceptable level. The objective of this work is to
investigate the techniques for reducing EMI in three-phase inverters and verify the
effectiveness of them. A prototype voltage source inverter incorporated with space
vector modulation has been built in the laboratory to verify the effectiveness of the
selected techniques.