New Sensorless Speed Control of a Hybrid Stepper Motor Based on Fuzzy Sliding Mode Observer

Stepper motors are widely used in industrial and consumer applications due to low-cost, high reliability, and open-loop control capability. Though open-loop features a simple structure, it bears low step resolution, high torque ripple, and low energy efficiency. To improve the performance without increasing hardware cost, a fuzzy sliding mode observer (SMO)-based new sensorless speed control structure is proposed. Unlike the conventional sensorless speed control, it does not use Park and inverse Park transformations to transform currents between a-b and d-q coordinates. Instead, it uses a new current transformation method to generate reference currents of stator windings, which not only reduces the calculation burden of the controller, but also improves the stability of the system. To reduce the chattering, a fuzzy logic controller (FLC) embedded into the SMO is designed to adjust the observer gain adaptively, without using the conventional method that replaces the discontinuous sign function with the continuous, such as sigmoid or saturation function. The effectiveness of the proposed controller is verified using MATLAB/Simulink simulation (R2018b, MathWorks, Natick, MA, USA) and experiment by assessing the speed and position tracking abilities.

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Speed Control Using Fuzzy Controller for a Four Switch Sensorless BLDC Motor

Volume 5 - 2020, Issue 9 - September - International Journal of Innovative Science and Research Technology ◽

10.38124/ijisrt20aug689 ◽

2020 ◽

Vol 5 (8) ◽

pp. 1668-1674

Author(s):

Niba Shoby ◽

Deepika Vasanthakumar ◽

Anupama P K

Keyword(s):

Fuzzy Logic Controller ◽

Fuzzy Controller ◽

High Reliability ◽

Speed Control ◽

Bldc Motor ◽

Motor Speed ◽

Zero Crossing ◽

Loop Control ◽

Speed Regulation ◽

Loop Control System

- Brushless Direct Current (BLDC) motors are highly efficient motors with high reliability and a longer life span. The advent of sensor less technology has improved the performance and reliability of BLDC motor drives. This work is to analyze a drive system for BLDC motor with Four-Switch Three-Phase Inverter (FSTPI). Back Electromotive Force (EMF) Zero Crossing Detection (ZCD) method is used to estimate the rotor position. Speed control of motor is achieved by using Fuzzy Logic Controller (FLC) based closed loop control system. The Simulation was carried out using MATLAB software and motor the performance was analyzed with FLC for motor speed regulation.

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Control for Multi-DOF Micro-Order Planar Motion Stage Based on Sliding Mode Observer

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.609-610.1201 ◽

2014 ◽

Vol 609-610 ◽

pp. 1201-1206

Author(s):

Song Yi Dian ◽

Guo Fei Xiang

Keyword(s):

Closed Loop ◽

Sliding Mode ◽

Open Loop ◽

Position Estimation ◽

Sliding Mode Observer ◽

Planar Motion ◽

Loop Control ◽

Position Sensing ◽

Motion Stage ◽

Planar Motion Stage

In this paper, a novel partial sensorless control (PSC) has been tailored to multi-DOF precision positioning issue for Sawyer motor-based planar motion stage. For the position estimation, a Sliding Mode Observer based technique has been implemented. We investigate the positioning performance on open-loop, closed-loop and PSC by experiments. The results of experiments have verified that PSC is an available way to maintain travel range and reduce the cost for precise position sensing while without so much sacrifice on positioning accuracy comparing with closed-loop control in all-axis for the stage.

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Sensorless Control of Nonsinusoidal Permanent Magnet Brushless Motor Using Selective Torque Harmonic Elimination Control Method Based on Full-Order Sliding Mode Observer

Advances in Power Electronics ◽

10.1155/2016/9358604 ◽

2016 ◽

Vol 2016 ◽

pp. 1-13 ◽

Cited By ~ 1

Author(s):

Abolfazl Halvaei Niasar ◽

Marzieh Ahmadi ◽

Sayyed Hossein Edjtahed

Keyword(s):

Permanent Magnet ◽

High Efficiency ◽

Control Method ◽

Sliding Mode ◽

Sensorless Control ◽

Control Strategies ◽

Torque Ripple ◽

Sliding Mode Observer ◽

Loop Control ◽

Harmonic Elimination

Nowadays, due to excellent advantages of permanent magnet brushless (PMBL) motors such as high efficiency and high torque/power density, they are used in many industrial and variable-speed electrical drives applications. If the fabricated PMBL motor has neither ideal sinusoidal nor ideal trapezoidal back-EMF voltages, it is named nonideal (or nonsinusoidal) PMBL motor. Employing conventional control strategies of PMSMs and BLDCMs lowers the efficiency and leads to unwanted torque ripple, vibration, and acoustic noises. Moreover, in many applications to reduce the cost and enhance the reliability of drive, sensorless control techniques are used. This paper proposes a novel sensorless control for a nonsinusoidal PMBL motor with minimum torque ripple. To develop smooth torque, the selected torque harmonic elimination strategy is employed. Furthermore, to estimate the rotor position and speed, a novel full-order sliding mode observer is designed. Proposed observer estimates the position and speed of motor from standstill to final speed. The proposed observer is robust to uncertainty of harmonic contents in phase back-EMF voltage and able to run the motor from standstill with closed-loop control scheme. The capabilities of torque ripple minimization and sensorless strategies are demonstrated with some simulations.

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Open Loop Speed Control Of Brushless DC Motor Using Low Cost Arduino UNO Processor

i-manager’s Journal on Electrical Engineering ◽

10.26634/jee.10.1.8190 ◽

2016 ◽

Vol 10 (1) ◽

pp. 1

Author(s):

Potnuru Devendra ◽

Mary K. Alice ◽

Ch. Sai Babu ◽

◽

...

Keyword(s):

Low Cost ◽

Speed Control ◽

Dc Motor ◽

Open Loop ◽

Brushless Dc Motor ◽

Brushless Dc ◽

Arduino Uno

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Speed control of induction motors using a novel fuzzy sliding-mode structure

IEEE Transactions on Fuzzy Systems ◽

10.1109/tfuzz.2002.1006440 ◽

2002 ◽

Vol 10 (3) ◽

pp. 375-383 ◽

Cited By ~ 78

Author(s):

F. Barrero ◽

A. Gonzalez ◽

A. Torralba ◽

E. Galvan ◽

L.G. Franquelo

Keyword(s):

Induction Motors ◽

Sliding Mode ◽

Speed Control ◽

Mode Structure ◽

Fuzzy Sliding Mode

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Research on an Improved Sliding Mode Sensorless Six-Phase PMSM Control Strategy Based on ESO

Electronics ◽

10.3390/electronics10111292 ◽

2021 ◽

Vol 10 (11) ◽

pp. 1292

Author(s):

Hanying Gao ◽

Guoqiang Zhang ◽

Wenxue Wang ◽

Xuechen Liu

Keyword(s):

Control System ◽

Control Strategy ◽

Sliding Mode ◽

High Reliability ◽

Permanent Magnet Synchronous Motor ◽

Torque Ripple ◽

Estimation Accuracy ◽

Switching Function ◽

Motor Speed ◽

Rotor Position

The six-phase motor control system has low torque ripple, low harmonic content, and high reliability; therefore, it is suitable for electric vehicles, aerospace, and other applications requiring high power output and reliability. This study presents a superior sensorless control system for a six-phase permanent magnet synchronous motor (PMSM). The mathematical model of a PMSM in a stationary coordinate system is presented. The information of motor speed and position is obtained by using a sliding mode observer (SMO). As torque ripple and harmonic components affect the back electromotive force (BEMF) estimated value through the traditional SMO, the function of the frequency-variable tracker of the stator current (FVTSC) is used instead of the traditional switching function. By improving the SMO method, the BEMF is estimated independently, and its precision is maintained under startup or variable-speed states. In order to improve the estimation accuracy and resistance ability of the observer, the rotor position error was taken as the disturbance term, and the third-order extended state observer (ESO) was constructed to estimate the rotational speed and rotor position through the motor mechanical motion equation. Finally, the effectiveness of the method is verified by simulation and experiment results. The proposed control strategy can effectively improve the dynamic and static performance of PMSM.

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