Synergetic Control of PMSM Drives for High Dynamic Applications

Many examples of high dynamic applications for permanent-magnet synchronous motor drives can be found in aerospace and robotic fields, also in hybrid electric vehicles interest for this kind of electric drive is growing. In these applications, PM motor drives are often required to operate at very fast transients and for wide operating regions; however, linear control and linearization techniques, which are well-known methods to analyze non-linear systems like an inverter fed electric drive, show limitations. Thus, the synergetic control, a non-linear control strategy, is proposed in the paper to achieve high dynamic controllers for vector-controlled PM machines. Synthesis of the control is achieved and suitable d-q axes control laws are suggested for an axial-flux permanent-magnet motor drive. Comparison with the performance of the previous designed linear control law is accomplished by means of simulations. Experimental results of the proposed control are achieved by using a fixed-point 16-bits DSP with suitable cost/performances ratio as calculus platform