Control of out-rotor bearingless brushless DC motor

A bearingless brushless direct current (BLDC) motor incorporates the function of magnetic bearings into a BLDC motor, making it a new type of high-performance motor. In this paper, the main motor windings are used to generate the radial force cancellation by injecting the required dc current, “integrated winding configuration”. The bearingless BLDC motor, direct current (DC) cancellation system model is established with the aid of (ANSYS/MAXWELL) software. The simulation results confirm that the rotor radial force is approximately zero and results from a balanced distribution of the magnetic flux density. The proposed DC excitation system is suitable to realize the rotor radial force cancellation in the bearingless BLDC motor. The simulation results of the proposed configuration show the approach of integrating winding configuration at different active pole positions to find the more efficient suspension performance and reduce the suspensions system current.

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“…The radial force in the motor can be analyzed by considering the force generated with a four-poles. The inductance can be expressed as (8),…”

Section: Radial Force Calculation Methodsmentioning

confidence: 99%

“…As a result, a force of levitation is created. The rotor shaft is suspended in the air gap without mechanical contact, and the rotor rotates without hitting the bearing surface [8], [9].…”

Section: Introductionmentioning

confidence: 99%

Radial force cancellation of bearingless brushless direct current motor using integrated winding configuration

Yousif

Mohammed

Ali

2022

IJEECS

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“…It is important to give precise value of torque to the model in order to design effective BLDC Motor drive system, where torque is function of back-Emf [4]. For energizing the stator winding in correct sequence the knowledge of rotor position is necessary since in order to rotate the rotor, stator winding has to be energized sequentially and also commutation has to be done electronically.…”

Section: Simulink Modelmentioning

confidence: 99%

“…The responses of the system are found to be highly nonlinear and Complex [3]. As the linear systems are approximated to obtain their mathematical model and the controller are designed for such systems may give the satisfactory dynamic responses, transient state and steady state responses but there are no optimum responses [4]. In some of the literature, the system parameters never change during the operating conditions it has been assumed but for the practical applications the mechanical parameter such as the inertia and the friction changes due to their decoupling inertia elements.…”

Section: Introductionmentioning

confidence: 99%

PI Controller Based Performance Analysis of Brushless DC Motor, Utilizing MATLAB Simulink Environment

Rawat

Bilal

Azeem

2020

JSRR

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Brushless DC Motor (BLDC) is gaining more and more popularity as one of the best electrical drives nowadays due to advantages like high efficiency, low maintenance, good reliability & wide dynamic response. The traditional brushed motor speed regulation is essentially effective in low speed and unable to lower the commutation torque ripple in high speed range. Speed regulation of Brushless DC (BLDC) motor is done by utilizing PI controller. The PI controller output act as the input to the variable voltage block. The mathematical modeling of BLDC motor is additionally shown here. The BLDC motor is supplied from the inverter while the rotor position and speed are the input here. The detailed mathematical model of the anticipated drive system is developed and simulated using MATLAB/Simulink environment. Principle of operation of using component is examined and therefore the simulation results are reported here to verify the theoretical analysis.

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“…Bearingless brushless DC (BBLDC) motor combines the advantages of the BLDC motor and magnetic bearing motor [1]. It is introduced for FESS drive motor with low energy consumption, high critical speed and good speed adjustment performance [2]. However, large torque ripple exists in the BBLDC motor due to cogging effect, non-ideal trapezoidal back electromotive force and current commutation, which affects its performance.…”

Section: Introductionmentioning

confidence: 99%

Torque Ripple Suppression Control of Bearingless Brushless Dc Motor in Wide Speed Regulation Range

Sun¹,

Yuan²,

Yang³

2018

PIER C

Self Cite

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Abstract-Bearingless brushless DC (BBLDC) motor in the flywheel energy storage system has advantages of low energy consumption, high critical speed and better speed adjustment performance. However, torque ripple exists inevitably due to the current commutation of the BBLDC motor and the wide range of speed changes when the flywheel energy storage system charges and discharges. In this frame, an approach of combining the direct torque control (DTC) with the current prediction control (CPC) is proposed to suppress torque ripple in wide speed regulation range. In this paper, the mathematical model of the BBLDC motor is given, and the principle of DTC scheme is introduced. On the basis of analyzing the causes of commutation torque ripple when using DTC scheme, CPC scheme is employed to minimize the commutation torque ripple by controlling the changes of phase current during commutation. During the non-commutation, the DTC is selected, and the CPC is selected during the commutation. Results show that the proposed approach is feasible, and torque ripple is effectively suppressed both in high speed and low speed. Moreover, this method has no effect on the suspension performance.

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Control of out-rotor bearingless brushless DC motor

Cited by 7 publications

References 4 publications

Radial force cancellation of bearingless brushless direct current motor using integrated winding configuration

Radial force cancellation of bearingless brushless direct current motor using integrated winding configuration

PI Controller Based Performance Analysis of Brushless DC Motor, Utilizing MATLAB Simulink Environment

Torque Ripple Suppression Control of Bearingless Brushless Dc Motor in Wide Speed Regulation Range

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