In this paper, the imbricated cells multilevel converters are studied and modeled from a control viewpoint. These make use of several switches connected in series, which allows using with reduced voltage ratings; these low have lower conduction losses can switch at higher frequency. addition to feature common all series switches, signals be phase shifted increase apparent switching frequency improve dynamic performances whole converter. It is shown that inverter leg, composed p pairs p-1...

This paper deals with fault diagnosis of induction machines based on the discrete wavelet transform. By using decomposition, information health a system can be extracted from signal over wide range frequencies. analysis is performed in both time and frequency domains. The Daubechies selected for stator current. Wavelet components appear to useful detecting different electrical faults. In this paper, we will study problem broken rotor bars, end-ring segment, loss phase during operation.

The multicell converters introduced more than ten years ago make it possible to distribute the voltage constraints among series-connected switches and improve output waveforms (increased number of levels apparent frequency). balance requires an appropriate distribution flying voltages. This paper presents some solutions for active control voltages across capacitors in presence rapid variation input voltage. latter part this is dedicated observation these using original modeling converter.

While the classical control techniques for three-phase two-level four-leg inverters are based on pulsewidth modulation or 3-D space vector modulation, this paper presents a simple digital current strategy without stage. The proposed controller uses discrete nature of inverter and filter to generate switching states. Using predictive cost function, optimal state be applied in next sampling interval is selected. offers excellent reference tracking with less harmonic distortion balanced...

High speed permanent magnet synchronous motors (PMSMs) are used in electric vehicles because of their intense power density. The high implies a significant electromotive force and requires flux weakening. usual control algorithms realize weakening by adding negative I <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">d</sub> current component when the voltage required regulation exceeds maximum depending on battery. If can be totally defluxed,...

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> Unlike traditional inverters, multicell inverters have the following advantages: lower switching frequency, high number of output levels, and less voltage constraints on insulated-gate bipolar transistors. Significant performances are provided with this structure which is constituted flying capacitors. This paper deals a predictive direct control applied to inverter for an original application...

A direct predictive control strategy is proposed for a three-phase four-level flying-capacitor (FC) inverter in this paper. The balancing of the FC voltages, challenge applications with small capacitors and low switching frequencies, done without any modulation, simply using tables calculated offline. These allow realization fast-dynamics output currents reduced <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">dv</i> /...

This study presents a new and original Mono inverter multi-parallel permanent magnet synchronous motor (PMSM) system. To obtain the stability of such system, each synchronisms should always be respected regardless their load torque. In this case, only one motor, called 'master motor', will self-piloted. If chosen master is with highest applied torque, synchronism for motors. find machine, solution that compares rotor positions thus developed. Experimental results are given system two PMSM...

An original approach to Predictive Torque Control “Split and Seek” (PTC SS) for Mono-Inverter Dual-Parallel Permanent Magnet Synchronous Machines (PMSM) system is presented. Only one cost function both PMSM defined be minimized through the PTC approach. Unlike Master-Slave classical control, solution of will depend on references. The principle this extend possibilities control by offering additional virtual vectors find vector which minimizes function. This process includes two steps: first...

This paper presents a dual parallel connected PMSM fed by single power inverter. Both motors have to respect the synchronism even if they different load torque. The rotor position of two i.e. applied on each motor are consequently permanently compared. with highest is set as master one and auto-piloted. other which has same voltage electric pulsation so speed rotation. change choice done whereas machine changing that oscillations appear during this change. steady state however rapidly...

This paper proposes a sensorless control system based on extended Kalman filter (EKF) for permanent magnet synchronous motors (PMSM). The EKF equations are built in rotor flux oriented coordinate, so it can easily be used either non-salient or salient pole motors. Inertia and other mechanic parameters not needed this observer. Rotor speed position estimated exactly then is built. initial the system. By some compensation observer equations, always stable has only one expected equilibrium...

This paper presents an artificial neural network (ANN) based technique to identify rotor faults in a three-phase induction motor. The main types of considered are broken bar and dynamic eccentricity. feature extraction on the frequency magnitude related fault components stator current spectrum is performed automatically by Matlab script. Features with different speed load levels used as input for training feedforward layered network. laboratory results show that proposed method able detect...

Current research and development programs in aviation are promoting new technological advances to make electrical systems cheaper, lighter more reliable.Mono-Inverter Dual-Permanent Magnet Synchronous Motor (MIDPMSM) tend share the static converters electro-mechanical by connecting motors parallel.However several studies have shown that efficiency of this configuration is lower than those with a traditional Mono-Inverter Mono-PMSM configuration, especially when unequal load torques...

This paper proposed a state observer based on extended Kalman Alter (EKF) for the rotor speed and load torque observation of permanent magnet synchronous motor (PMSM). can be used to estimate precise position in servo systems with only optical encoder limited accuracy. By using observed instead values got directly from encoder, control performances greatly improved. The also give which as feedforward compensation PI controller. improve performance during change. filter is solve nonlinear...

Nowadays, more and applications use direct drive actuators. This leads to a flexible structure represented by two-mass model. Furthermore, the parameter variations create an oscillating system need new definition of controller synthesis maintain unchanged performance. Firstly, common pole placement is designed, followed three methods based on linear quadratic optimisation: first optimised with small number parameter, second takes energy into account third combines this principle achieve all...

The paper focuses on the synchronous reluctance machine rotor design. rotor's shape in this should maximize flux passing d axis while minimizing its q axis. This can be achieved by designing to respect natural flow of order reduce magnetic resistance increasing insulation proposed design method is based determining analytical equation lines through a solid rotor. will allow definition optimal curvature barriers. In second phase, width barriers determined basis preservation theory every...

The digital control of high speed Permanent Magnet Synchronous Motor (PMSM) is carried out as part mass reduction for embedded systems. This paper focuses on improving the stability PMSM control. A study closed-loop system shows importance taking into account constraints (delay and discrete characteristics) in calculation decoupling terms inverse Park transformation. proposed done using model a prediction evolution currents during delay. voltage, calculated by vector control, applied to...

High speed Permanent Magnet Synchronous Motors (PMSM) are used in electrical vehicles because of their strong power density. The high implies a big electromotive force and requires flux-weakening. Usual control algorithms do flux-weakening by adding negative I <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">d</sub> current when the required voltage regulation exceeds maximum depending on battery. If magnet can be totally defluxed then it is...

Making electrical driving systems cheaper, lighter, and more reliable is the consistent pursuit of current research development. Mono-inverter multipermanent magnet synchronous motor tend to share static converters in electromechanical by connecting machines parallel. This type system has an obvious advantage overall weight cost. In this article, we have proposed a new maximum torque per ampere (MTPA) control strategy for MIMPMSM system, which supports three or parallel works both mode brake...