Labview FPGA FOC implementation for synchronous Permanent Magnet Motor Speed Control

Abstract

this paper describes an implementation of FOC (Field Oriented Control) algorithm for speed control of a Permanent Magnet Synchronous Motor -PMSM. The motor considered is a Brushless-AC type -BLAC, with sinusoidal back-electromotive force -BEMF waveform, and the application intended for this motor is the direct drive -DD type of washing machines. The FOC algorithm is implemented using a National Instruments Labview FPGA System. This system is composed of a high level/high productivity tool for FPGA logic synthesis. The paper describes the design principles for FOC algorithm and then explains the implementation of the designed controllers in the Labview FPGA platform. Experimental results are provided to verify the FOC implementation.

Analysis of power converters with devices of sic for applications in electric traction systems

“…The control system that shape it the power converter and electric motor that is selected is the Field Oriented Control FOC, this algorithm allows control of the speed of a Permanent Magnet Synchronous Motor (PMSM) and has been used widely in the Electric Drives Industry in the recent years [15].…”

“…External PI controller sets a reference current Iq based on speed setpoint of the machine, This is compared with actual current isq, generating an error signal which goes through a PI controller that generates the reference Vsq, for flux control, error is calculated between the reference value Idref and the measured value Ireal generating the reference Vsd, by the second PI controller [15]. 4 C. Power Loss.…”

Predictive Control of Variable Speed Wind Energy Conversion System with Multi Objective Criterions

“…Also, they allow a significant reduction of the power converters size and cost since the size of the converters is related to the speed variation range, typically around +/-30 % of the synchronous speed. Note that the main advantage of the WECS based DFIG machine is the perfect decoupling between active and reactive power control by controlling rotor currents [1][2][3][4][5][6][7][8].…”

“…In [3][4][5], the block diagram of the power control of the DFIG incorporates a cascaded structure with four PI regulators, two PIs in the outer loops for stator active and reactive powers and two PIs in the inner rotor currents loops with also an additional PI loop for the speed. As a consequence there exists degradation in the dynamic performance due to delay times of cascaded regulators and reduced robustness against model uncertainties.…”

“…Direct Control techniques that originated from Direct Torque Control DTC for induction machines in [2][3][4] and Direct Self Control DSC in [6] provide direct control of the machine's torque reducing the complexity of the FOC control. These methods have been translated to control DFIG and are different from FOC in that they take into account the discrete nature of power converters and use a switching table to select the appropriate voltage vector to be applied on terminal machine.…”