Laboratory power inverter platform for variable speed drive

In this paper a laboratory power inverter platform is proposed. The platform can operates autonomously by choosing an adequate signal processor or controlled by the powerful dSpace 1104 board, facilitating the rapid implementation of the design algorithms. At the same time, scalar and field oriented control of the three-phase asynchronous machine through the ControlDesk tool have been developed. Functional tests have been performed both on the control part and on the power section. In order to make safe tests of the modulation strategies the following have been taken into account: — operation of the voltage and current transducers both as independent device (to obtain the circuit information) and as an integral part of the control loop; — operation of the three-phase power IGBT module with the associated system circuits (galvanic isolation, drivers and control); — autonomous operation of the digital pulse width modulated signal (PWM) generating circuit. The experimental results confirm the proper design of the laboratory power inverter platform connected to the three-phase asynchronous machine.