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Two-phase induction motor (TPIM) can be controlled using a 4-leg voltage source inverter (VSI) topology. A space vector based space vector pulse width modulation (SVM) is proposed in this paper for the 4-leg VSI by decomposing it into a dual single phase full-bridge VSIs. The switching algorithm is envisaged by exploiting the principles of SVM of three-phase VSIs. The implementation of the proposed...
The paper deals with design and simulation of 2-phase direct torque controlled induction motor (IM) drive using space-vector modulation (SVPWM). The IM drive is supplied 2-phase full bridge inverter. The control system uses direct torque control method with PI controllers of torque and flux denoting by reduced torque ripple. Simulation results in both motoring and regenerating modes are given in the...
In this paper, we analyze the properties of the vector fields associated with all possible configurations of a single-phase DC/AC inverter with the objective of designing a hybrid controller for the generation of an approximation of a sinusoidal reference signal. Using forward invariance tools for general hybrid systems, a hybrid controller is designed for the switched differential equations capturing...
This paper establishes the vector control of a five phase permanent magnet synchronous motor (PMSM). First, the mathematical model of a five-phase PMSM is described in a decoupled space with two orthogonal components. Next, space vector modulation (SVM) algorithm is presented to obtain high performance vector control drive. The vector control principle of a five-phase PMSM is developed to prove the...
The paper presents closed-loop ac drive with 5-phase induction motor operating with voltage source inverter and sine-wave filter. The motor supply voltages and currents have sinusoidal shape. For well known adjustable electric drives the field oriented control method with flux and speed control can be applied. In the presence of output filter both control and estimation algorithms should be modified...
This paper presents the direct-torque control of a permanent magnet synchronous motor using four-switch three-phase inverter. The control of the four-switch inverter was developed based upon the orientation of four-switch space-vectors in the plane of six-switch inverter. The proposed inverter was successfully used in the direct-torque control of a PMSM. A dynamic model of a machine gives deep insight...
We propose a consensus-based distributed voltage control (DVC), which solves the problem of reactive power sharing in autonomous meshed inverter-based microgrids with inductive power lines. Opposed to other control strategies available thus far, the DVC does guarantee reactive power sharing in steady-state while only requiring distributed communication among inverters, i.e. no central computing nor...
This paper presents a new decoupling current control algorithm for Static Synchronous Compensator (STATCOM) system operating under unbalanced condition. The STATCOM is constructed using multilevel cascaded H-bridge inverter (CHI) employing new multilevel selective harmonic elimination pulse width modulation (MSHE-PWM) technique. The MSHE-PWM is based on variable DC voltage levels, which enables elimination...
A conversion structure based on a multilevel inverter for grid connected photovoltaic applications is presented. The structure includes two T-type three-level inverter, which are connected to grid by a three-phase transformer with the open winding configuration on inverters side. It also includes two insolated strings of PV panels that are feeding each one of the T-type inverters. The obtained multilevel...
This paper deals with field-oriented control (FOC) and vector control (VC) of a promising brushless doubly-fed reluctance generator (BDFRG) technology for large-scale wind turbines. The BDFRG has been receiving increasing attention because of the low operation & maintenance costs afforded by the use of partially-rated power electronics, and the high reliability of brushless construction, while...
Carrier-based modulation is widely adopted since it offers some benefits compared to space-vector modulation in both two-level and multilevel inverters, such as inherent simplicity, flexibility, reduced computational times, and possibility of implementation on industrial DSPs. Among the numerous types of PWM techniques, the centered PWM (CPWM) is nearly optimal modulation, since it minimizes the RMS...
A drive train system (DTS) powered by a battery and driving a permanent magnet synchronous motor (PMSM) is discussed in this paper. A two-level, three-phase conventional inverter with no harmonic filters on both AC and DC sides is used as means of power conditioning. This DTS is modelled as a double oscillator according to the mechanical part in an electric vehicle. Two inverter modulation schemes...
This work proposes a sensitivity analysis of the control of a 3-phase open-end windings PMSM H-bridge drive. The study issues are focused on the robustness of Space Vector PWM modulation strategies towards unavoidable operating faults. The considered faults are due to the imperfection of the PWM hardware implementation, the power converter nonlinearity and the harmonic distortion of the PMSM phase...
A performance comparison study for a two- and three-level inverter based permanent magnet synchronous machine (PMSM) drive has been carried out. A novel space-vector pulse width modulation (SV-PWM) based DC-link voltage balancing algorithm is also presented, to drive the machine from three-level inverter. The proposed algorithm keeps the two DC-link capacitor voltages at their specific voltage tolerance...
Fault-tolerant operation of dual traction inverters is vital to reliability of the propulsion system in hybrid electric vehicles (HEVs). This paper presents a six-phase current reconstruction technique for dual traction inverters in case of the failure of phase current sensors. With an extra current sensor installed in the DC link, missing phase currents can be derived from the DC-link current by...
This paper presents a model predictive control algorithm of three-phase bidirectional AC-DC converter that can be used for V2G and G2V applications. This algorithm utilizes the discrete behaviour of the converter to determine appropriate switching states that minimize the cost function. The proposed predictive control scheme allows bidirectional power transfer with instantaneous mode changing capability...
The direct torque control of induction motor has good dynamic performance of torque and flux. However, the switching frequency is variable and difficult to control due to the use of hysteresis controllers. That is the origin of torque and flux ripples. And the use of a two levels voltage inverter limits the drive system power. To overcome these problems, we propose to study in this paper a modified...
The paper is concerned with field-oriented control (FOC) and vector control (VC) of a promising brushless doubly-fed reluctance generator (BDFRG) technology for adjustable speed wind turbines with maximum power point tracking. The BDFRG has been receiving increasing attention because of the low capital and operation & maintenance costs afforded by using partially-rated power electronics and the...
Focusing on the non-stationary characteristic of the fault signal of subway auxiliary inverter, this paper proposes the method that combines ensemble empirical mode decomposition (EEMD) with genetic algorithm to optimize BP neural network (GABP) to diagnose the fault categories of subway auxiliary inverter. Firstly, this paper extracts feature vectors from the original fault signal by EEMD, then establishes...
This paper presents the simplified active power and reactive power control with the maximum power point tracking (MPPT) for single-phase grid-connected photovoltaic (PV) inverters. With the proposed control strategy, the perturbation and observation method is used for the simple MPPT algorithm and the current command on the stationary reference frame is regulated by the PI current controller. In order...
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