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In this paper, a high energy efficiency control strategy for electric power generation with synchronous reluctance machine (SynRM) is proposed. This kind of machine is gaining attraction in various fields of application due to its high efficiency, compactness and the capability of operating over a wide speed range. These features are highly desirable for generators especially those that operate from...
A novel passivity-based controller using three time-scale separations is introduced for variable speed drives of flywheel energy storage systems. The time-scale separation between the power electronics, the electrical machine variables, and the mechanical machine variables is used in order to design a nested three-layer controller. Since the dynamics of the variable speed drive are non-linear, the...
This paper studies the feasibility of the use of a synchronous reluctance machine (SynRM), working as a generator, in a wind power generation system. The main goal of this research is to develop a reliable and inexpensive alternative for power generation with no rare-earth materials and good performance and efficiency. A full-power back-to-back converter is used to inject the converted energy into...
High performance interior permanent magnet synchronous machines show nonlinear magnetics due to saturation and cross-coupling. Nonlinear differential equations describe these phenomena and make feedback control challenging. This paper presents a predictive control method to precisely control the dynamics of these machines. Four real-time capable strategies to online identify transient trajectories...
This paper targets to the challenge of electrical energy production and energy efficiency by studying synchronous reluctance machines (SynRM), as an alternative to permanent magnet generator in electric power generation with focus in renewable energy applications. Considering the SynRM as a special case of the wound-rotor synchronous generator, this paper explores the operating limits of the machine...
This paper analyses the detuning effects of machine electrical parameters on the performance of unified direct flux vector control (UDFVC) of induction motor drives. Drive self-commissioning is discussed as a way to estimate parameters for better control performance and accurate torque estimation. The potential of the unification of direct flux and current vector control has been recognized for both...
The number of doubly fed induction generators (DFIGs) has been grown in recent years because of its merits. They play an important part of the total amount of wind generation. On the other hand due to proliferation of utilizing non-linear loads in power system, power quality problems like harmonics, voltage sag/swell, etc outbreak. These problems have destructive effect of performance of DFIG. To...
A torque control method for Brushless Direct Current (BLDC) motor is introduced in this paper, which plays vital roles in In-wheel vehicle system. In-wheel motor can be used in electric cars with 4 wheels independent drive configuration. Within every wheel, there can be one “Direct-Drive In-wheel motor” to generate the necessary torque per wheel. In order to improve dynamic response characteristics...
With the growing of electrical energy demand, wind energy gains higher potential and plays a vital role in energy sectors. Direct driven permanent magnet synchronous generator (PMSG) with a full size back-to-back converter set is one of the promising technologies employed with wind power generation. This paper focuses on developing a control scheme of PMSG-based wind turbines to obtain maximum wind...
This paper proposes the use of a 3-level Cascaded H-Bridge Multilevel Inverter (CHMI) topology which results in further torque ripple minimization compared to the 2-level inverter-based Direct Torque Control (DTC). This is due to the increase in the inverter switching voltage vectors that allows minimization of the torque error. This in turn can reduce the Total Harmonic Distortion (THD) of the output...
The multi-degree-of-freedom spherical driving joint with direct bearing driven by spherical motor owns high mechanical integrity and has many advantages such as control and trajectory planning. This paper presents a novel multi-degree-of-freedom spherical reluctance driving joint with magnetic levitation, and analyses operation mechanism, and next deduces the joint's magnetic conduction of the gap...
With increasing performance of magnet material and decreasing cost permanent magnet synchronous machines (PMSM) become more and more important for practical use in naval applications. Excellent torque dynamics are important in these applications - they allow meeting additional demands due to electrical system stability. Dynamics are limited by the rating and the switching frequency of the converter...
Variable structure control (VSC) theory is applied to analyze and design AC servo system for field-oriented permanent-magnet synchronous motor, which is based on Luenberger load observer. Some results of simulation experiments suggest that the AC servo system based on VSC has speedy response, high accuracy and strong robustness against its parameter variations and load disturbances. Its performance...
Double-loop control systems of brushless DC motor (BLDCM) yield a combination of desired characteristics including simplified control structure, high speed accuracy, wide operating speed range and fast dynamic response. The current loop is very important for system performance. Its linearity is influenced by the accuracy of feedback current. The cost of detecting currents in three windings is higher,...
In this paper, a combined control strategy of Single Neuron PID and normal PID is proposed for the switched reluctance motor, which has simple structure, adaptability to environmental changes and strong robustness. The input of outer loop is error of speed while output is torque which enters the inner loop of the Direct Torque Control system to control a three phase 6/4 pole SRM whose capacity is...
Dual motor drives fed by single inverter are purposely designed to reduced sizes and cost with respect to single motor drives fed by single inverter. This paper presents the speed responses behavior of Dual Permanent Magnet Synchronous Motor (PMSM) driven base on two different PWM control schemes, which are Space Vector Pulse Width Modulation (SVPWM) and Hysteresis Current Controller. These two techniques...
A fault-tolerant technique valid for both open-loop and vector-control motor-drive systems is introduced in this paper. The technique is merely presented for AC motors with Delta-connected circuits in their stator windings. Hence, it enables the operation of the three phase motor upon a failure in one of its phases without the need of a special fault detection algorithm. This technique is to significantly...
The main objective of this paper is to control the speed of an induction motor by using seven level diode clamped multilevel inverter. To obtain high quality sinusoidal output voltage with reduced harmonics. The proposed Scheme for diode clamped multilevel inverter is multicarrier SPWM control. An open loop speed control can be achieved by using V/f method. This method can be implemented by changing...
This paper presents novel direct torque control (DTC) algorithms for induction motor drives for the reduction of common mode voltage. In the Proposed DTC algorithm-I the space vector plane is divided into six sectors same as that of Conventional DTC algorithm. In the proposed algorithm-II, the space vector plane is divided into twelve sectors instead of six sectors as in conventional DTC algorithm...
This paper presents some specific issues of a high speed permanent magnet synchronous motor control used in a combustion engine supercharger system. A description of a method designed to limit the load angle of synchronous motor in high speed is given. Also experimental results in dynamic states are shown. In these states mainly acceleration times and energy intensity with correlation on motor current...
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