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Wide bandgap (WBG) power electronics is a very small segment of power electronics market (1%) and about 0.05% of the total semiconductor market today. The U.S. has a strong foothold in both the silicon carbide (SiC) and gallium nitride (GaN) markets today, but there exists an increasing competition from Europe, Japan, and China. This work presents market, value chain and energy savings potential analyses...
New standards and requirements for energy efficiency and power loss measurements for variable speed drives are presented. The power losses of typical variable speed drives with rated power of 22 kW are analyzed and alternatives to increase the drives efficiency together with system impact are investigated. An innovative motor drive with silicon carbide (SiC) devices and integrated LC filter is discussed...
Computational burden is a major hurdle for practical implementation of finite-state predictive torque control (FS-PTC) of motor drive fed by a multi-level inverter. One of the reasons of computational complexity is that all voltage vectors are evaluated for prediction and actuation. This paper proposes selected number of voltage vectors for the prediction and actuation, which are called prediction...
This article presents the developments of a novel isolated/non-isolated quad inverter configuration for multilevel dual six-phase (twelve-phase) star-winding converter. The modular circuit consists of four standard voltage source inverters (VSIs). Each VSI is incorporated with one bi-directional switch (MOSFET/IGBT) per phase and links with the neutral line through two capacitors which allows symmetrical...
This paper proposes an effective model predictive direct torque control approach (MP DTC) for a three phase induction motor (IM) drive. With the proposed formulation, main features of new strategy as well as merits and drawbacks with respect to other control strategies developed for the three-phase IM like classic DTC, field oriented control, sliding mode control, and so on can be easily and promptly...
Electric vehicle appears to be one of the valuable solutions for environmental protection and the fast rate of depletion of world fuel oil supply. In particular, due to an increase in the elderly population and aging of a megacity, the need for electric micro mobility is even more apparent. Electric vehicles have serious disadvantages because of the limitation on cruising range imposed by weight,...
Inverter dead-time, which is meant for safe commutation of devices is known to induce sub-harmonic oscillations in lightly-loaded induction motor drives operating in open-loop. This paper presents an experimental procedure to determine whether a given motor drive would exhibit such oscillations, and if yes, the region of such oscillatory behaviour. In particular, this paper presents case studies on...
This paper presents an inverter topology, which aims to connect several DC sources to the same AC output using a single stage of conversion. This topology has been given the name of multi-source inverter. This concept has been developed for applications such as hybrid electric powertrains. Specifically, this topology allows different DC-link voltages to drive a traction motor using the battery voltage...
MOSFETs built using wide band gap (WBG) materials offer numerous benefits to power electronic circuits. These benefits are quite apparent in applications requiring breakdown voltages ≥ 600V, where Silicon IGBTs are typically used due to their combination of high breakdown voltage and low conduction losses. Compared to Silicon IGBTs, WBG MOSFETs offer very short turn-ON and turn-OFF times, which reduce...
A novel multilevel inverter topology with reduced number of power switches is proposed. This new topology is based on a combination of conventional diode clamped and H-bridge topologies. The proposed idea has been validated through simulation results.
This paper proposes an implementation to achieve a regenerative braking control for a dual-PMSM drive system. By using the proposed maximum efficiency searching algorithm, maximum power recovery from the braking control can be obtained. A digital signal processor, TMS 320F 2808, is used to execute all of the control algorithms, including dual-motor driving control, dual-motor regenerative braking...
Instead of constant dc-link voltage, this paper proposes a PAM/PWM for PMSM drive, which provides variable dc-link voltage to PWM inverter to reduce switching loss and improve system efficiency. An optimal dc-link voltage reference can be found for a specified operation speed for a centrifugal load condition. In order to realize the variable dc-link voltage, this paper implements a variable output...
This paper presents a multi motor drive based on a dual purpose energy conversion system with an energy storage. The proposed structure and control are directly applicable for heating ventilation and air conditioning (HVAC) systems adding an energy storage functionality. Based on the new structure, a dual functional control scheme has been introduced to manage the charging/discharging of the energy...
This paper proposes the novel control method for mono inverter dual parallel (MIDP) interior permanent magnet synchronous machine (IPMSMs) drive system. It includes maximum torque per ampere (MTPA) control method to elevate drive efficiency and active damping control method to alleviate inherent stability problem of MIDP motor drive system. Due to the combination of reluctance and electromagnetic...
This paper proposes a partial power assistance operation to encourage the feasibility of a single-phase diode rectifier-fed motor drive system equipping DC-link shunt compensator (DSC). DSC which is located to DC-link in parallel allows to remove electrolytic capacitor and grid filter inductor from the system by performing grid current shaping and motor output power supporting controls. The capability...
In this study, an inverter model including non-ideal Insulated Gate Bipolar Transistors (IGBTs) characteristics and a busbar model using impedance measurement is proposed. A motor drive system in Hybrid Electric Vehicle (HEV) consists of a battery, an inverter, a cable, and an electric motor. The inverter is not only a voltage source, but also one of the principal noise sources in the motor drive...
This paper presents a two parallel converters hardware configuration for elevator drive system with individual DC-Links to reach more modular design. And a new circulating current suppressing strategy is proposed to reduce the Inter-Converter inductor as low as possible. With the new hardware configuration, first, the zero-sequence circulating current and the cross current paths are analyzed. Then,...
This paper provides theoretical, numerical, and experimental comparisons in electrical-drive performance between a double-star chopper-cells (DSCC) inverter and a triple-star bridge-cells (TSBC) converter. The inverter and converter are two of the most promising members of the modular multilevel cascade converter (MMCC) family. Two sets of downscaled electrical drives using the DSCC inverter and the...
This paper presents a performance comparison study between the proposed continuous- and discontinuous-hybrid-PWM (C-HPWM, D-HPWM) based techniques used for neutral point clamped (NPC) 3-level inverter. The H-PWM strategy uses both the advantages of carrier and space vector based PWM strategies. The duty cycles are generated using the carrier based strategy to reduce the computational complexity of...
This paper proposes a simple three-level direct torque control scheme incorporating a sparse three-level neutral point clamped inverter for the control of a low voltage interior permanent magnet synchronous machine. The main objective of the proposed scheme is to improve the torque and flux responses of the direct torque controlled interior permanent magnet machine with the minimum amount of semiconductor...
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