Sensorless control of three phase BLDC motor drive with improved flux observer

R, Sreepriya; Rajagopal, Ragam

doi:10.1109/iccc.2013.6731667

Cited by 12 publications

(9 citation statements)

References 4 publications

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“…These filters introduce a time delay dependable on the rotor speed and, thus, affect the dynamic performance of the drive system. Other sensorless methods need extensive offline tuning of observers to estimate the position accurately [27][28][29]. In [30], an observer based on offline data of the back-EMF is used to provide the necessary position information.…”

Section: Introductionmentioning

confidence: 99%

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Energy‐efficient sensorless load angle control of a BLDC motor using sinusoidal currents

Viaene¹,

Verbelen²,

Derammelaere

et al. 2018

IET Electric Power Applications

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Nowadays, most brushless DC (BLDC) motors use Hall sensors or sensorless algorithms based on backelectromotive force (back-EMF) sensing to detect rotor position information. These methods detect the commutation moments but imply the use of rectangular stator currents which, according to recent literature, limits the energy efficiency. In this study, sinusoidal stator currents are used to increase the motor energy efficiency. As a consequence, standard control based on the feedback of the Hall sensors or based on sensorless techniques detecting the back-EMF zero-crossing cannot be used. Therefore, the authors propose a load angle control algorithm for BLDC motors without using position and speed sensors. The objective is to obtain energy-efficient sensorless control for the BLDC motor based on the measurement of only two current and one voltage signal. The energy saving potential of the proposed method is especially outspoken for fixed speed applications with varying loads, which are typical BLDC applications. Experimental results are presented to validate the proposed method. Energy efficiency measurements over the whole operating range of the BLDC motor are included and show an energy saving potential up to 9.5%.

show abstract

Section: Introductionmentioning

confidence: 99%

“…Other sensorless methods need extensive offline tuning of observers to estimate the position accurately [27–29]. In [30], an observer based on offline data of the back‐ EMF is used to provide the necessary position information.…”

Section: Introductionmentioning

confidence: 99%

Energy‐efficient sensorless load angle control of a BLDC motor using sinusoidal currents

Viaene¹,

Verbelen²,

Derammelaere

et al. 2018

IET Electric Power Applications

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show abstract

“…Numerous sensorless control algorithms for BLDC have been reported over the past decades, and they are of great reference value for DSEM. The followings are mainly included: zero-crossing point detection of back electromotive force (BEMF), testing pulses injection, states observer and flux linkages based techniques [8][9][10][11][12]. All the aforementioned methods have their own advantages; however, BEMF-based method is the most widely used one especially at medium and high speeds [8].…”

Section: Introductionmentioning

confidence: 99%

Research on sensorless and advanced angle control strategies for doubly salient electro‐magnetic motor

Zhou

Zhang

Guo

et al. 2016

IET Electric Power Applications

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This paper proposes a sensorless method for doubly salient electromagnetic motor (DSEM). The commutation signals are obtained through the comparison between the voltage of silent phase and a pre-set threshold value based on the characteristic that the excitation back electromotive force (EBEMF) at commutation points is unaffected by the saturation of excitation field. Furthermore, in order to improve the torque output performance of DSEM, a novel sensorless advanced angle control (AAC) is investigated. Unlike traditional AAC, through piecewise linear fitting EBEMF in advance commutation interval, this method does not require the detection of standard commutation points. The experiments implemented on a 12/8-pole DSEM validate the proposed methods over a wide range of speed and load conditions in both steady and dynamic procedures.

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“…But the switching between two operating mode causes the system more complex and even unstable [1,7] . Dual PLL structure is used in Ref.…”

Section: Introductionmentioning

confidence: 99%

PLL control system based on FPGA for brushless DC motor

Zhao

2014

Proceedings of the 33rd Chinese Control Conference

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Brushless DC motors (BLDCM) are widely used for industry control field. Steady speed control accuracy and speed control bandwidth are the key indexes in industrial application. In this paper, a phase-locked loop control system for BLDCM is proposed to achieve better dynamic performance and steady-state accuracy. A ten-state phase-frequency detector is designed to detect the speed error of the rotor. And an all digital PLL control system for BLDCM is realized with Verilog HDL. Finally, a control and drive circuit based on FPGA is implemented and applied to momentum flywheel to verify the feasibility of the proposed control system. Experimental results show that steady speed accuracy could be achieved better than 0.1%.

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Sensorless control of three phase BLDC motor drive with improved flux observer

Cited by 12 publications

References 4 publications

Energy‐efficient sensorless load angle control of a BLDC motor using sinusoidal currents

Energy‐efficient sensorless load angle control of a BLDC motor using sinusoidal currents

Research on sensorless and advanced angle control strategies for doubly salient electro‐magnetic motor

PLL control system based on FPGA for brushless DC motor

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