| Abstract |
The paper presents a microcomputer controled, transistorised converter for a variable speed, a.c. motor drive.The converter, supplied from an intermediate circuit of constant continuous voltage, has the character of a current source. The power transistors of the inverter are so
controled that three-phase, sine-wave current, with adjustable frequency and amplitude is forced in the motor windings. The inverter design, with automatic sinewave current tracking control system, numerical three-phase sine-wave current reference signal generation and microprocessor
control of the converter are discussed. Results about the inverter are presented too, by means of more photographed oscillograms. |
