Abstract
This paper proposes a closed-loop control implementation fully-embedded into an FPGA for a permanent-magnet synchronous motor (PMSM) drive based on a four-level active-clamped converter. The proposed FPGA controller comprises a field-oriented control to drive the PMSM, a DC-link voltage balancing closed-loop control (VBC), and a virtual-vector-based modulator for a four-level active-clamped converter. The VBC and the modulator operate in consonance to preserve the DC-link capacitor voltages balanced. The FPGA design methodology is carefully described and the main aspects to achieve an optimal FPGA implementation using low resources are discussed. Experimental results under different operating conditions are presented to demonstrate the good performance and the feasibility of the proposed controller for motor-drive applications.
Highlights
The use of multilevel power converters for industrial applications has increased significantly in the last years thanks to their advantages compared to conventional two-level converters [1]
Compared to the commonly-used diode-clamped topology, which presents a lower number of switches, the multilevel active-clamped (MAC)
The shaft of the permanent-magnet synchronous motor (PMSM) driven by the field-programmable gate arrays (FPGA) controller is coupled to an induction machine, which is not used, and to another
Summary
The use of multilevel power converters for industrial applications has increased significantly in the last years thanks to their advantages compared to conventional two-level converters [1]. Some of these advantages are higher efficiency, higher power density, reduced harmonic distortion, etc. The DC-link bus is split into several partial voltages with the inclusion of capacitors This implies necessary control actions to keep these capacitor voltages balanced. Compared to the commonly-used diode-clamped topology, which presents a lower number of switches, the MAC converter advantages are: lower conduction losses, improved switching-losses distribution, blocking voltage of a device always equal to the voltage across adjacent levels, and improved fault-tolerance capacity [3]. 2018, 11,propose to use a MAC converter to drive a permanent-magnet synchronous motor (PMSM)
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