A novel structure for vector control of a symmetrical six-phase induction machine with three current sensors

Vector control is one of the most popular multiphase induction machine drive methods due to its dynamic performance. Since all phase currents are needed in vector control drive, by increasing phase numbers, the number of required current sensors increases which is one of the disadvantages of vector control in multiphase machine drives. In this paper vector control of a symmetrical six-phase induction machine with a novel configuration is presented. The aforementioned configuration is designed in a simple way that only three current sensors will be needed. Analytical equations are extracted in this paper to show that some of current components which do not contribute in torque production will be eliminated due to the proposed scheme. Simulation and experimental results are provided to verify the benefits of the proposed configuration.

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Novel nonlinear control structure for vector control of SPIM drive using BS PCH

International Journal of Power Electronics and Drive Systems (IJPEDS) ◽

10.11591/ijpeds.v11.i2.pp1099-1108 ◽

2020 ◽

Vol 11 (2) ◽

pp. 1099

Author(s):

Ngoc Thuy Pham

Keyword(s):

Nonlinear Control ◽

Vector Control ◽

Closed Loop ◽

System Structure ◽

Current Loop ◽

Equation Resolution ◽

Damping Matrix ◽

Current Controller ◽

Novel Structure ◽

The Difference

This paper presents a novel structure combining the port-controlled Hamiltonian (PCH) and Backstepping (BS) nonlinear control for the vector control of the six-phase induction motor (SPIM). In this new scheme, to improve the outer loop’s robustness, the BS technique using the integral tracking errors action is proposed in the speed and flux controllers design. The advantage of this proposed control law is not to increase the complexity of differential equation resolution due to being not increased system states numbers. To enhance more the performance of SPIM drives (SPIMD), port-controlled Hamiltonian (PCH) scheme is used in the inner current loop controllers. In this proposed PCH current controller, the stabilization of controller is achieved via system passivity. In that, the interconnection and damping matrix functions of PCH system are shaped so that the physical (Hamiltonian) system structure is preserved at the closed loop level and the closed loop energy function is equal to the difference between the physical energy of the system and the energy supplied by the controller. The proposed control design is based on combination PCH and BS techniques improve significantly performance and robustness. The proposed speed control scheme is validated by Matlab-Simulink software.

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Asynchronous machine vector control: PIα controllers for current loops

Proceedings of the Institution of Mechanical Engineers Part I Journal of Systems and Control Engineering ◽

10.1177/0959651818784211 ◽

2018 ◽

Vol 234 (1) ◽

pp. 107-117

Author(s):

Rahma Hammami ◽

Imène Ben Ameur ◽

Khaled Jelassi

Keyword(s):

Vector Control ◽

Temperature Effect ◽

Fractional Order ◽

Induction Machine ◽

Field Oriented Control ◽

Electrical Parameters ◽

Industrial Systems ◽

Squirrel Cage ◽

Simulation Results ◽

Fractional Order Controller

This article deals with field-oriented control of induction machine squirrel cage. A robust fractional-order controller is applied and investigated to control the induction machine currents isd and isq. The fractional-order gives better fit in regulation operation. For this purpose, this controller form is recommended, especially in industrial systems, thanks to his flexibility, robustness and efficiency to solve complex problems such as electrical parameters changes (i.e. uncertain parameter) caused by the temperature effect. Based on frequency specification and several constraints, the fractional-order controller is designed. The fmincon toolbox optimization is used to adjust ki, kp and α values. In order to show the reliability of the developed controller in the induction machine behavior, several simulation results are carried out and illustrated.

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