Wide Speed Range Operation Strategy of Indirect Matrix Converter–Surface Mounted Permanent Magnet Synchronous Motor Drive

Abstract

In order to expand the speed range for an indirect matrix converter–surface mounted permanent magnet synchronous motor drive (IMC-SPMSM), a wide speed range operation control strategy based on a flux-weakening control and an over-modulation method is proposed in this paper. In the stage of the inverter, an IMC over-modulation method is designed, which increases the fundamental voltage transmission ratio (VTR) to 1. In addition, considering the variation of the voltage limit boundary of the IMC with motor speed, flux-weakening control is implemented based on the voltage error feedback method, which maximizes the voltage utilization rate by setting the endpoint of the output voltage vector on the voltage boundary during the flux-weakening operation. In the stage of the rectifier, over-modulation is automatically switched on or off according to operation requirements by a modulation depth controller. Finally, experimental results show that the proposed strategy increases the maximum speed of the IMC-SPMSM by nearly 35% compared to the maximum torque per ampere (MTPA) method. Besides, the enlarged voltage margin by the rectifier stage over-modulation effectively shortens the setting time.

Performance Analysis of Conventional IPMSM and NCPM Based IPMSM

“…[31], in order to achieve the torque and speed requirements for the dependable operation that satisfies the criteria of an electric propulsion system, describes how a five-phase permanent-magnet synchronous motor functions under one-or two-phase failures. This paper proposes a broad speed range operation control technique based on flux-weakening control and an over-modulation method for an indirect matrix converter-surface mounted permanent magnet synchronous motor drive (IMC-SPMSM) [32,33]. The Element-Free Galerkin technique (EFG) is used in this work to describe flexoelectricity in a composite material.…”

An Novel Six-Segment Modulation Strategy for Three-Phase Isolated PFC Converter

“…Acting as a rectifier between power grid and powered devices, it has been widely used in communication power supply, photovoltaic system [1] and electric vehicle [2]. However, the power rectifier may produce a large number of harmonics, reduce the system efficiency and power quality, and may even endanger the safe operation of the grid [3,4]. Therefore, it is necessary to reduce and suppress the undesirable harmonics.…”