Position detection and start-up algorithm of a rotor in a sensorless BLDC motor utilising inductance variation

Jang, Gunhee; Park, J. H.; Chang, Junghwan

doi:10.1049/ip-epa:20020022

Cited by 106 publications

(40 citation statements)

References 4 publications

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“…이 방식은 회전자 정렬 시 고정 자전류가 급격히 증가되며, 회전자에 진동이 발생될 수 있 다. 전동기 기동 시 일시적인 역방향 회전을 방지하기 위 하여, 영구자석에 의한 고정자 철심 포화효과를 사용하는 방 법 [10], [11] …”

Section: 서 론unclassified

Control Techniques of Sensorless BLDC Motor Drive for a Vehicle Fuel Pump Application

Tran¹,

Chun²,

Lee³

et al. 2011

The Transactions of The Korean Institute of Electrical Engineer

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-This paper suggests a control technique of the sensorless brushless DC (BLDC) motor drive for a vehicle fuel pump application. The sensorless technique based on a comparator and a potential start-up method with high starting torque are proposed. The comparator is used to generate the commutation signals in phase with the three-phase back-EMFs. The rotor position is aligned at standstill for maximum starting torque without an additional sensor and any information of motor parameters. Also, the stator current can be easily adjusted by modulating the pulse width of the switching devices during alignment. Some experiments are implemented on a single chip 16-bit DSP controller to demonstrate the feasibility of the sensorless techniques.

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Section: 서 론unclassified

Control Techniques of Sensorless BLDC Motor Drive for a Vehicle Fuel Pump Application

Tran¹,

Chun²,

Lee³

et al. 2011

The Transactions of The Korean Institute of Electrical Engineer

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“…Therefore, the initial rotor position estimation for the PMSM has been an ongoing topic of research. There are mainly two basic methods based on using pulse signal injection [2]- [9] or high-frequency (HF) carriersignal injection [9]- [14].…”

Section: Introductionmentioning

confidence: 99%

Initial position estimation of permanent magnet synchronous motors based on variation behavior of winding inductances

Meng

et al. 2015

2015 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia)

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An estimation method of initial rotor position is a difficult research branch in permanent magnet synchronous motors(PMSM), it is also an important research branch in sensorless technique. In PMSM with a saliency pole structured rotor, influenced by saliency effects, the self-inductance and mutualinductance present periodicity variation, Starting from this feature Firstly, the method of injecting high frequency low voltage pulses is utilized for identifying the line inductance and then the influence of winding current to line inductance are thorough analyzed by Fourier series decomposition. Secondly, using the rotational coordinate transformation, the fundamental harmonic and third harmonic can be eliminated to some extent, and then the inductance can be presented by a sine function, then the position vs. inductance characteristics are modeled for estimating the rotor position. The experimental results show that the proposed method estimates the initial rotor position reliably and efficiently.Index Terms-permanent magnet synchronous motor(PMSM) ; high frequency low voltage pulses; initial rotor position; the position vs. inductance model; rotational coordinate transformation;

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“…Another important improvement of these methods is the time needed for the initial rotor position estimation, which for the most of the most proposed methods is shorter than the rotor alignment process. Mainly these methods are based on the stator windings inductance change to rotor position and the stator core magnetic saturation effect due to the rotor permanent magnets [5]. The initial rotor position can be estimated by evaluating the three phase inductances.…”

Section: Introductionmentioning

confidence: 99%

A novel initial rotor-position estimation method for BLDC motors based on four voltage pulses

Istvan

Coroban-Schramel

Tiponut

2010

2010 12th International Conference on Optimization of Electrical and Electronic Equipment

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This paper presents a new initial rotor position estimation method for brushless dc motors (BLDC). It consists in injection of four short voltage pulses at the motor terminals and then based on the evaluation of the voltage measured at the terminal of the non-energized (floating) stator phase, the position is estimated. The first three pulses are applied for a very short time to evaluate the rotor position while the fourth (last) pulse is used only for detection of magnet polarity. The estimation time of the position with an uncertainty of 180 o is independent of the motor electrical time constant, being less than 140μs, while the detection of magnet polarity could last longer (up to few milliseconds) until the iron core is saturated. The proposed method is proved only for salient pole BLDC motors (L d ≠L q ). The advantages of the proposed method are taught to be: quickness, simplicity, accuracy, low computation effort, and the most important: insensitive to the high voltage disturbances specific to the battery voltage in the vehicles. No current sensor is used for the proposed setup. Experimental results are provided to prove the concept and validate the solution.

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Position detection and start-up algorithm of a rotor in a sensorless BLDC motor utilising inductance variation

Cited by 106 publications

References 4 publications

Control Techniques of Sensorless BLDC Motor Drive for a Vehicle Fuel Pump Application

Control Techniques of Sensorless BLDC Motor Drive for a Vehicle Fuel Pump Application

Initial position estimation of permanent magnet synchronous motors based on variation behavior of winding inductances

A novel initial rotor-position estimation method for BLDC motors based on four voltage pulses

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