A Web-accessible FPGA-based direct torque controller for permanent magnet synchronous motor

A direct torque controller for permanent magnet synchronous motors (PMSMs) using a single-chip FPGA (field programmable gate array) with soft-CPU (central processing unit) core is reported. This controller was constructed by connecting a gate drive unit and an A/D converter board that acquires the information from current and voltage sensors, to Altera Nios development board. As an advantage example of the use of a soft-CPU core, the functions, which are motor starting/stop and data monitoring function through LAN, were implemented on the controller. It was confirmed that a 1.5 kW PMSM could be controlled by a remote computer connected with constructed controller through LAN.