This article proposes a common-mode voltage (CMV) attenuation method for the three-phase current source inverter (CSI)-fed permanent-magnet synchronous machine drive. The key of this is to introduce an auxiliary circuit branch connected in parallel with dc link. Based on dedicated switching strategy, zero-voltage-switching conditions are provided main switches CSI. In particular, zero vector newly constructed without utilizing shoot-through operation Thus, CMV traditional CSI drives...

The silicon carbide (SiC) devices have attracted more and attention due to the capability of withstanding higher blocking voltage, switching frequency, temperature. However, challenges for SiC applied in voltage-source-inverter fed motor drives such as electromagnetic interference (EMI) issues limited over-current still limit further application devices. In this article, a novel based zero-voltage-switching (ZVS) current-source-inverter (CSI) is proposed permanent-magnet synchronous (PMSM)...

In this article, the switching strategy and remedial control scheme are studied for cascaded current-source converters (CSCs) fed dual three-phase permanent-magnet synchronous motor (PMSM) variable-speed drives. An optimized space vector modulation (SVM) is proposed to reduce DC-link current ripple drives system. particular, can work effectively under low speed with back EMF, where there exists a large voltage difference between peak values on grid side side. Apart from that, hybrid...

In this article, a modular current-fed high-frequency transformer isolated matrix converters (CF-HFT-MC) based wind energy conversion system (WECS) is proposed. The CF-HFT-MC module utilizes the instead of line-frequency input transformer, and eliminates bulky vulnerable electrolytic capacitors in WECS. Therefore, power density, reliability efficiency WECS can be increased. Moreover, single-stage soft-switching achieved modules, which reduce losses system. With function electric isolation,...

Pulsewidth-modulated (PWM) current-source converters (CSCs) have the features of simple configuration, reliable short-circuit protection, and sinusoidal ac output voltages. The conventional space-vector modulation (SVM) scheme usually generates high-magnitude low-order harmonics in CSCs with low switching frequency. In this article, two modified SVM schemes, namely MSVM1 MSVM2, are proposed to improve harmonic performance for PWM high-power applications frequencies. focuses on eliminating...

In this article, a novel soft-switching current-source rectifier (CSR) based bidirectional on-board charger (OBC) system is proposed for electric vehicles (EVs) comprising multiple battery sets. Besides the CSR's inherent advantages of higher-quality input voltage waveforms, enhanced short-circuit-current tolerant capability and long lifetime dc choke, cascaded configuration choppers can implement higher dc-link with low-voltage sets, devices be used. With auxiliary resonant circuit in link,...

This article proposes an improved space vector modulation (SVM) for the current-source rectifier (CSR). Due to overlap time during commutations of power switches, pulsewidth-modulation (PWM) currents CSR may suffer from a number low-order (mainly fifth and seventh) harmonics, which seriously degrade harmonic performance voltages on grid side. Especially, overlap-time effect becomes important issue when increased switching frequency is applied CSR. To mitigate these harmonics PWM converter...

The grid inverters play an important role in renewable energy systems, transferring the dc power to ac grid. Galvanic isolation is usually needed between source and due safety reasons grounding leakage current mitigation. In this article, a soft-switching isolated inverter proposed based on current-fed matrix-type configuration. topology of converter composed H-bridge side direct matrix side, which are linked by high-frequency transformer. primary-side can smooth dc-source control directly....

In this article, multiple advanced low-switching-frequency modulation and control schemes are investigated for dual three-phase permanent-magnet synchronous motor (PMSM) drives. The under investigation include multisampling space vector (MS-SVM), selective harmonic elimination pulsewidth (SHEPWM), optimal (SOPWM), whereas the complex control, model predictive (MPC), flux trajectory control-based pulse pattern (MP3C). difference between PMSM drives at low switching frequencies is analyzed....

Pulsewidth modulated (PWM) current-source converters (CSCs) have been attractive for high-power adjustable-speed machine systems with low carrier ratios. However, the high-order nonlinear model of CSC-fed systems, distinct digital delay from ratios, and cross-coupling caused by coordinate transformation bring great challenges to design high-performance stator current controller such kind systems. Firstly, this article derives discrete-time complex-vector permanent-magnet ac (PMAC) system...