Experimental implementation PWM strategy for dual three-phase PMSM using 12-sector vector space decomposition applied on electric ship propulsion

Abstract

The current paper aims at presenting and examining an implementation on a digital signal processor (DSP) of the conventional space vector pulse width modulation (CSVPWM) so as to control the dual three phase permanent magnet synchronous motors (DTP-PMSM) drives applied on electric ship propulsion. It is also an attempt to accomplish a developed control of this technique based on vector space decomposition (VSD) strategy. By this strategy, the analysis and the control of the machine are achieved in three two-dimensional orthogonal subspaces. Among the 12 voltage vectors having maximum, the conventional technique namely the adjacent two-vectors (12SA2V) is chosen. Thereby, the test platform allows the implementation of the chosen vectors which are modeled on MATLAB/Simulink using block diagrams and the automatically generated code which is targeted in the DSP card processor. Simulation and experimental results have exposed the efficiency of the proposed test bench of 5 KW prototype machine by using a low-cost TMS32F28379D.

Direct Torque Control of Dual Three-Phase Permanent Magnet Synchronous Motor

“…By means of this transformation, the complex system of motor is decomposed into three decoupled communally orthogonal subspaces (α, β), (z1, z2) and (o1, o2). The variables equations of the machine, under the assumptions [26] concerning sinusoidally distributed windings and the neglect of magnetic saturation and iron losses, can be represented in stationary frame by [11]:…”

“…The VSD theory for DTP induction motor was presented in [10]. In relation to the VSD strategy, the overall machine model is transformed into three decoupled subspaces, written in three independent space coordinates, identified as, (α, β) torque-component , (z1, z2) harmonic-component and (o1, o2) zero-sequence, respectively [11][12][13][14][15][16][17]. Direct Torque Control (DTC) for DTP has been studies in recent years.…”

Efficiency improvement of dual three-phase permanent magnet synchronous motor using modified switching table DTC for electric ship propulsion

“…Figure 1 and Figure 2 illustrate the DTP-PMSM and VSI-fed drive. The two three-phase windings are identical with two independent neutral points [12]. The DTP-PMSM is complex and high order system.…”

“…Using this transformation, the system is projected into three orthogonal subspaces (α, β), (z 1 , z 2 ) and (o 1 , o 2 ). The voltage equations, are expressed as [12]:…”

“…The conventional VSD control for DTP induction motor was given in [11]. As specified by the VSD strategy, the machine model is transformed into three decoupled subspaces, identified as, (α, β) torque-component, (z 1 , z 2 ) harmonic-component and (o 1 , o 2 ) zero-sequence, respectively [12]- [18]. Direct torque control (DTC) is a technique used for high performance control of three phase electric drive systems [19].…”