Design and practical implementation of a back-EMF sliding-mode observer for a brushless DC motor

Hicham, F.; Djemaï, Mohamed; Busawon, Krishna

doi:10.1049/iet-epa:20070242

Cited by 57 publications

(26 citation statements)

References 4 publications

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“…In order to reduce the torque ripples, DTC [3,4], adaptive control [5], hysteresis current control, hybrid PWM chopper based overlapping and observers [6][7][8] have been proposed. Among these methods, DTC not only controls the torque directly but also has the advantages of simple structure, fast torque response and good robustness.…”

Section: Introductionmentioning

confidence: 99%

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

Sun¹,

Yuan²,

Yang³

2018

PIER C

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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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Section: Introductionmentioning

confidence: 99%

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

Sun¹,

Yuan²,

Yang³

2018

PIER C

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“…Some researchers also proposed techniques using model-based estimation. Sliding mode observers have been applied to estimate back-EMF, rotor position, and speed in [8] and [9]; however, the chattering or zigzag motion toward the zerocrossing points makes the accurate detection of zero-crossing points be hardly achieved. Dhaouadi et al [10] used extended Kalman filter to estimate speed and rotor position with the information of motor voltages and currents.…”

Section: Introductionmentioning

confidence: 99%

A 12-Step Sensorless Drive for Brushless DC Motors Based on Back-EMF Differences

Wang

Lee

2015

IEEE Trans. Energy Convers.

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This paper presents a new 12-step sensorless drive for brushless dc motor based on back-electromotive force (back-EMF) differences, which are estimated from the disturbance observer (DOB) structure. Availability of rotor position information with a resolution of 30°and commutation without phase shift are the advantages of using the back-EMF differences. Unlike the conventional methods that obtain part of the back-EMF signal from the manipulation of three phase voltages, the proposed DOB structure can access the entire back-EMF profile. By designing a proper low-pass filter in the DOB structure, the back-EMF difference can be well detected with lower sensor noise. Compensation of delay commutation introduced by the filter is also discussed. Experiment results showed that the proposed sensorless drive is capable of running the motor in lower speed, and performs better under different speed and load torque as compared with the conventional method.Index Terms-Back electromotive force (back-EMF) detection, back electromotive force differences, brushless dc motor (BLDC), delay compensation, disturbance observer (DOB), sensorless control, torque ripple.

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“…The methods include the back EMF method, the third harmonic EMF method and the observer method [6]- [8]. The detection circuits and the DC bus voltage midpoint are adopted to reconstruct the motor neutral point in the back EMF method.…”

Section: Introductionmentioning

confidence: 99%

Position Sensorless Control of BLDC Motors Based on Global Fast Terminal Sliding Mode Observer

Wang¹,

Fu²,

Wang³

2015

Journal of Power Electronics

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The brushless DC motor (BLDCM) has many advantages. As a result, it is widely used in electric vehicle (EV) drive systems. To improve the reliability of the motor control system, a position sensorless control strategy based on a sliding mode observer (SMO) is proposed. The global fast terminal sliding mode observer (GFTSMO) is proposed to enhance the control performance of the SMO control system. The advantages of the linear sliding mode and the nonsingular terminal sliding mode (NTSM) are combined in the control strategy. The convergence speed of the system state is enhanced. The motor commutation point is obtained with the observation of the back EMF, and the instantaneous torque value of the motor is calculated. Therefore, the position sensorless control of the BLDCM is realized. Experimental results show that the proposed control strategy can improve the convergence speed, dynamic characteristics and robustness of the system.

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Design and practical implementation of a back-EMF sliding-mode observer for a brushless DC motor

Cited by 57 publications

References 4 publications

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

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

A 12-Step Sensorless Drive for Brushless DC Motors Based on Back-EMF Differences

Position Sensorless Control of BLDC Motors Based on Global Fast Terminal Sliding Mode Observer

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