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Multiphase electric drives have been investigated and proposed for applications where the highest overall system reliability and the reduction in the total power per phase are required. This paper deals with the high performance Backstepping control strategy which is based on laws allowing an explicit control of system stability in closed-loop operation of five-phase induction motor drives. This control...
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...
This paper presents a novel seven-phase open-end winding drive system supplied by the dual non-square matrix converter. The input to each of the matrix converter is three phase utility grid system and the output is seven phase voltages with variable voltage and frequency. The two matrix converters feeding the seven-phase open-end load are supplied from a common single three-phase utility source of...
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...
The paper proposes a computationally efficient finite state model based current control of a three-level neutral point clamped (NPC) five-phase voltage source inverter. The space vector model of a five-phase voltage source inverter (VSI) yields 243 space vectors, with 240 active and three zero vectors. The presented technique utilizes a modified switching algorithm to reduce the computation time while...
In this paper comprehensive space vector model of a thirteen-phase voltage source inverter (VSI) is reported. The paper also discusses the space vector Pulse Width Modulation (SVPWM) of a thirteen-phase voltage source inverter (VSI) with the aim of producing sinusoidal output waveform. Generalized space vector theory is used to achieve the SVPWM. As per the general inverter switching theory there...
In this paper a generalized multi-phase space vector theory is considered for developing the space vector modulation of a three-phase to seven-phase direct matrix converter (DMC). The modulation is based on the control of the voltage vectors in the first d-q plane, while imposing the remaining voltage vectors in the second and the third planes (x1–y1, x2–y2) zero. The duty cycles of the bidirectional...
Energy resources and food security are the most important issues for many countries around the world. Climatic conditions affect the agriculture production which is the backbone of the food security for all countries. Protected agriculture presents an effective solution to face this challenge. This paper aims to develop a high tech greenhouse with effective climatic control for greater yield. A fuzzy...
It is documented that almost 98% of all voltage generated by electric utilities has up to 3% unbalance. Single phasing fault deserves special attention since phase loss is considered the worst case of unbalanced supply voltage. This paper focuses on unbalanced supply condition diagnosis and discrimination between an unbalance in the supply and phase loss fault. The discrimination will be based on...
A single phase self excited induction generator (SEIG) can operate in two configurations; single winding and double winding. Their performance analyses have been presented quite extensively by the researchers. However, all of these address each configuration in isolation with no attempt being made thus far to present an integrated comparative performance assessment of the two models. This paper fills...
This paper proposes technique to obtain ten-phase output from three-phase input supply system using special and novel transformer connection. With the proposed supply system, pure ten-phase sine-wave voltage/current is obtained that can be used for the motor testing purposes and obtaining dual five-phase supply. The proposed transformer connection yield ten-phase output while the input is grid supplied...
Multi-phase machines (more than three phases) offer additional degree of freedom in control that can be used for developing improved drive system. This paper presents mathematical model of a seven-phase series-connected three-motor drive system. The modeling is done first in the phase variable domain and then transformed into the stationary common reference frame. The presented model is verified using...
Recently, Permanent Magnet Synchronous Motors (PMSM) is one of the most attractive electric machine in industrial applications, therefor must be protected against electrical and mechanical failures for continue their operation safely. However, different kinds of faults are unavoidable in motors during their operational service. Unbalancing in the supply voltage is common in grid supply. However, the...
Multiphase machines are considered for high power variable speed drive applications due to numerous advantages that they offer when compared to their three-phase counterparts. Multiphase VSI or CSI used to provide variable voltage and variable frequency supply with appropriate PWM control to multiphase machines. Carrier-based PWM and space vector PWM (SVPWM) are the most common options for controlling...
In this paper, a five-phase induction motor drive system supplied using a PWM Voltage source Inverter (VSI) with output LC filter is discussed. The design and performance of drive system with LC filter connected at the output terminals of the PWM inverter is elaborated. The purpose of the filter is to eliminate both high-frequency harmonics of the voltage and current waveforms from the five-phase...
This paper presents space vector modulation strategy for eliminating the common mode (CM) voltage of a three level five-phase neutral point clamped (NPC) voltage source inverter (VSI). There are two hundred and forty three discrete switching states available for operation and control of the NPC VSI. Out of two hundred and forty three switching states only fifty one switching states gives zero common...
This paper proposes space vector pulse width modulation (SVPWM) technique for a direct matrix converter with five-phase input and three-phase output. This topology of matrix converter is developed exclusively for feeding three-phase stiff grid system with five-phase variable input supply. One of the presumed applications is wind electric energy generation system. The paper presents the complete space...
This paper proposes an effective approach to detect, isolate, and identify fault severity and post fault operation of permanent magnet synchronous motors (PMSM) in the presence of stator winding turn fault. The paper proposes fault tolerant operation of PMSM under post condition with stator winding turn fault by using grounded neutral point through controllable impedance using artificial neural network...
Multi-phase motor drives becoming popular in some niche application areas such as ship propulsion, ‘more electric aircraft’ electric and hybrid electric vehicle. The rise in popularity is attributed to fact that they are robust, less noisy, reduced volume and lower per-phase power handling by the feeding converters. Adjustable speed drives invariably need power electronic converter for their supply...
An additional topology, opened up by the use of multiphase machines, is independent control of two series connected motors, when being fed from a single VSI. The vector control of two machines connected in series when fed by a multiphase inverter lead to additional degree of freedom which lead to independent control of the two machines. To do so, it is necessary to connect in series stator windings...
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