Sensorless Control for Four-Switch Three-Phase Brushless DC Motor Drives

Lin, Cheng-Tsung; Hung, Chung-Wen; Liu, Chih-Wen

doi:10.1109/ias.2006.256817

Cited by 21 publications

(8 citation statements)

References 8 publications

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“…In the BLDC motor, position sensor presents numerous disadvantages, such as increase in machine size, reduction in reliability, higher value of noise, etc. In order to remove the position sensor from the BLDC motor, various methods have been proposed for its sensorless control [1]- [6]. In most of the proposed methods, the performance of motor gets deteriorated during transient state, low speed operating range and at the time speed reversal.…”

Section: Introductionmentioning

confidence: 99%

Bi-Directional Position and Speed Estimation Algorithm for Sensorless Control of BLDC Motor

Astik

Bhatt

Bhalja

2018

Electrical, Control and Communication Engineering

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The observer design for estimation of back EMF to control the Brushless DC (BLDC) motor is proposed in this paper. Rotor position of the BLDC motor is estimated using the sequence of estimated back EMF. During speed reversal of motor, the actual and estimated values of speed fail to track the reference speed and if corrective action is not taken by the observer, the motor goes into the unstable region. To overcome this problem, the speed estimation algorithm is proposed for BLDC motor control during its speed reversal operation. Infinite Impulse Response (IIR) Butterworth first order low-pass filters are used in the observer for smoothing the estimated back EMFs of the BLDC motor. A new controller scheme based on Modified Hybrid Fuzzy PI (MHFPI) controller is proposed to control the speed of the BLDC motor. The effectiveness of the proposed method has been validated through simulations for different disturbances such as step changes in the reference speed and load torque of the motor and results are compared with the existing methods.

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Section: Introductionmentioning

confidence: 99%

Bi-Directional Position and Speed Estimation Algorithm for Sensorless Control of BLDC Motor

Astik

Bhatt

Bhalja

2018

Electrical, Control and Communication Engineering

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“…Thus, many researchers have suggested application of sensorless drive which can regulate speed and position without using shaft-mounted position sensors [2]. Main types of sensorless control methods are the back-EMF measurement, third harmonic sensing of back EMF, back EMF integration, flux linkage estimation, freewheeling diode and estimator-based approach [3][4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…The method for measurement of back EMF requires additional power supply for a comparator to detect freewheeling current [3,4]. Shen et al [5] proposed a scheme to detect the third harmonic of back EMF.…”

Section: Introductionmentioning

confidence: 99%

Analysis of sensorless control of brushless DC motor using unknown input observer with different gains

Astik¹,

Bhatt

Bhalja

2017

Journal of Electrical Engineering

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A sensorless control scheme based on an unknown input observer is presented in this paper in which back EMF of the Brushless DC Motor (BLDC) is continuously estimated from available line voltages and currents. During negative rotation of motor, actual and estimated speed fail to track the reference speed and if the corrective action is not taken by the observer, the motor goes into saturation. To overcome this problem, the speed estimation algorithm has been implemented in this paper to control the dynamic behavior of the motor during negative rotation. The Ackermans method was used to calculate the gains of an unknown input observer which is based on the appropriate choice of the eigenvalues in advance. The criteria to choose eigenvalue is to obtain a balance between faster convergence rate and the least noise level. Simulations have been carried out for different disturbances such as step changes in motor reference speed and load torque. The comparative simulation results clearly depict that the disturbance effects in actual and estimated responses minimizes as observer gain setting increases.

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“…The output of the hysteresis controller for torque and flux are shown in Eqs. (Table III) and the stator flux position information defined in the equivalent sector are used to translate these two control states into the inverter gate drive signals [20], [21].…”

Section: Torque Ripple Suppression For Fstpi Bldcm Drivementioning

confidence: 99%

Torque Ripple Suppression Method for BLDCM Drive Based on Four-Switch Three-Phase Inverter

Pan¹,

Sun²,

Wang³

et al. 2015

Journal of Power Electronics

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A novel inverter fault-tolerant control scheme is proposed to drive brushless DC motor. A fault-tolerant inverter and its three fault-tolerant schemes (i.e., phase A fault-tolerant, phase B fault-tolerant, and phase C fault-tolerant) are analyzed. Eight voltage vectors are summarized and a voltage vector selection table is used in the control scheme to improve the midpoint current of the split capacitors. A stator flux observer is proposed. The observer can improve flux estimation, which does not require any speed adaptation mechanism and is immune to speed estimation error. Global stability of the flux observer is guaranteed by the Lyapunov stability analysis. A novel stator resistance estimator is incorporated into the sensorless drive to compensate for the effects of stator resistance variation. DC offset effects are mitigated by introducing an integral component in the observer gains. Finally, a control system based on the control scheme is established. Simulation and experiment results show that the method is correct and feasible.

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Sensorless Control for Four-Switch Three-Phase Brushless DC Motor Drives

Cited by 21 publications

References 8 publications

Bi-Directional Position and Speed Estimation Algorithm for Sensorless Control of BLDC Motor

Bi-Directional Position and Speed Estimation Algorithm for Sensorless Control of BLDC Motor

Analysis of sensorless control of brushless DC motor using unknown input observer with different gains

Torque Ripple Suppression Method for BLDCM Drive Based on Four-Switch Three-Phase Inverter

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