FPGA Implementation Vector Control of Tandem Converter Fed Induction Machine József Vásárhelyi 1 , Mária Imecs 2 , Csaba Szabó 2 , Ioan Iov Incze 2 1 Egyetemváros, University of Miskolc, H-3515 Miskolc, Hungary vajo@mazsola.iit.uni-miskolc.hu 2 Technical University of Cluj-Napoca, P. O Box 99, Cluj-Napoca, Romania {csaba.szabo, ioan.incze, imecs}@edr.utcluj.ro Abstract: The paper focuses on the implementation in Field Programmable Gate Arrays (FPGA) of vector control systems of the induction motor supplied from the tandem (hybrid) static-frequency converter. The paper tries to give a synthesis of the tandem vector control structure implementation. The implementation was made using the library elements for rapid prototyping of vector control systems for induction motor. The implementation analysis is presented. Keywords: FPGA, embedded system, vector control, tandem inverted, motion control. 1 Introduction There are two types of digital signal processing algorithms: filtering algorithms and signal analysis algorithms. These algorithms are based on either differential equations (recursive and non-recursive), or discrete Fourier transformation (DFT), and can be implemented in any of the following forms: hardware, firmware, and software. In the software approach, the algorithm is implemented as a computer program on a general-purpose computer such as a workstation, a minicomputer, a personal computer, a programmable DSP chip, or a microcontroller or other hardware support. In the hardware approach, the algorithm is implemented using digital circuitry, such as the shift register to provide the delaying operation, the digital multiplier, and the digital adder (such as Field Programmable Gate Arrays - FPGA). Alternatively, a special purpose VLSI chip may be designed and fabricated to implement a specific filtering algorithm (i.e. Application Specific Integrated Circuit - ASIC).