A novel position-sensorless control method for brushless DC motors

Zhang, Xiren; Wang, Y.N.

doi:10.1016/j.enconman.2010.10.030

Cited by 38 publications

(14 citation statements)

References 15 publications

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“…The back EMF ZCP introduces the low-pass filter [10]. It needs to be established table according to the phase shift Angle under different rotational speed form to query the compensating phase shift Angle, which can make the rotor position detection inaccurate [11].When the motor speed is very low or static, it is difficult to accurately detect the zero signal.…”

Section: The Sensorless Control Methodsmentioning

confidence: 99%

Research on Sensorless Control Strategy of Motor Controller for Electric Bicycle

Lyu¹,

Chi²,

Yu³

2015

Proceedings of the 3rd International Conference on Material, Mechanical and Manufacturing Engineering

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Abstract. This paper research on sensorless control of brushless dc motor control for electric bicycle. Based on the work requirements of electric bicycles, this paper introduces some method to improve the start of the motor and the detection of the motor's rotor position, expand the speed range of electric bicycle without hall and solve some problem in starting process. Finally, this paper verifies the feasibility of the scheme on the electric bicycle. IntroductionNow most of the control strategy of electric bicycle give priority to sensor control strategy. Sensorless control strategy is complementary. When the hall sensors can work normally in the electric motor, the sensor control strategy will be adopted. When the hall sensors are broken, the controller will switch into the sensorless control strategy, in order to ensure the electric bicycle can still run without hall sensor [1][2]. Although sensorless control strategy can ensure electric bicycle working, it can't satisfy customers' demand for high quality of running on electric bicycle [3][4]. Compared with the sensor control strategy, the sensorless control strategy of electric bicycle are still many deficiencies.Those are: 1) The motor speed, can be adjusted, is low.2) There are the dithering phenomenon in starting process. The sensorless control methodThe rotor detected method of sensorless control. Based on the electric bicycle's operation environment and operation requirements of the motor, this paper improves the back EMF ZCP(electromagnetic force zero-crossing point), optimizes the voltage comparison circuit, and enlarges the speed range of the method. In the process of normal operation of the simplified equation of brushless dc motor can be written as follows [5-6]: (1) (In the Eq. 1, 、、 are the three-phase voltages of brushless dc motor, 、、 are the three phase currents, 、、 are the three phase opposite potentials, R is the resistance of three-phase, M is the mutual inductance between the phase winding, L is the self-inductance of the three-phase winding, and P is the differential operator )We can see that[4]：3rd International Conference on Material, Mechanical and Manufacturing Engineering (IC3ME 2015)

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Section: The Sensorless Control Methodsmentioning

confidence: 99%

Research on Sensorless Control Strategy of Motor Controller for Electric Bicycle

Lyu¹,

Chi²,

Yu³

2015

Proceedings of the 3rd International Conference on Material, Mechanical and Manufacturing Engineering

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“…The Resistance of the Coil is Rs; the self-Inductance of the Coil and Mutual Inductor of the Coil are L and M; ea, eb and ec represent the electromotive reaction of the generator; ia, ib and ic represent the phase current; va, vb and vc are the terminal voltages. The dynamic equation of the three-phase BLDCM is expressed as follows: [11] …”

Section: Equivalent Dynamic Mathematical Model Of Bldcmmentioning

confidence: 99%

Application of Extension Sliding Mode Strategy to Maximum Power Point Tracking in Human Power Generation Systems

2015

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Sliding mode strategy (SMS) for maximum power point tracking (MPPT) is used in this study of a human power generation system. This approach ensures maximum power at different rotation speeds to increase efficiency and corrects for the lack of robustness in traditional methods. The intelligent extension theory is used to reduce input saturation and high frequency switching in sliding mode strategy, as well as to increase the efficiency and response speed. The experimental results show that the efficiency of the extension SMS (ESMS) is 5% higher than in traditional SMS, and the response is 0.5 s faster.

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“…Compared to the other observers, the SMO has low requirements of the accuracy of the mathematical model of the system. It has good robustness to system parameter perturbations and external disturbances [9]- [11].…”

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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A novel position-sensorless control method for brushless DC motors

Cited by 38 publications

References 15 publications

Research on Sensorless Control Strategy of Motor Controller for Electric Bicycle

Research on Sensorless Control Strategy of Motor Controller for Electric Bicycle

Application of Extension Sliding Mode Strategy to Maximum Power Point Tracking in Human Power Generation Systems

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

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