Expert system based automated design technique of a voltage-fed inverter for induction motor drive

The authors describe expert-system-base automate design of a pulse width modulation (PWM) voltage fed inverter for an induction motor drive on the basis of design specifications provided by the user, who could be a skilled or a semiskilled designer. During a typical consultation with the expert system, the user undergoes an interactive dialogue session in simple English to supply the details of load condition, power supply, etc., to the expert system. The expert system then designs the converter system in detail and the solution is displayed on the screen. The program is developed with the help of an expert system shell named Personal Consultant Plus (PC PLUS). The present program can design inverter systems for the range of machines of 1-50 HP using bipolar junction transistors or insulated-gate bipolar transistors, but can be expanded for higher power range using other power devices. The knowledge base of the program incorporates the domain expertise of a power electronics design engineer and the database contains the ratings of power semiconductor devices from a particular vendor