New modulation encoding techniques for indirect rotor position sensing in switched reluctance motors

Ehsani, M.; Husain, Iqbal; Mahajan, S.; Ramani, K.

doi:10.1109/28.273625

Cited by 129 publications

(38 citation statements)

References 8 publications

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“…Several methods of position estimation have been reported for Rotary Switched Reluctance Motors (RSRMs) [1][2][3][4][5][6][7][8][9][10][11][12] (a) Incremental inductance measurement--The basic principle of incremental inductance was originally proposed in [1] and an analytical model of incremental inductance in term of Fourier series was reported in [2]. By investigating the chopping characteristics of phase current waveforms, this method mainly considers the relationship between incremental inductance and position.…”

Section: Introductionmentioning

confidence: 99%

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Experiments in the Position Detection of Linear Switched Reluctance Motor

Zhao

Cheung

Gan³

et al. 2006

2006 2nd International Conference on Power Electronics Systems and Applications

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Abstract--Position detection is very important in operation of Linear Switched Reluctance Motors (LSRMs).With increasing application of LSRMs, the position detection techniques would get more and more attention. In this paper, a position detection scheme is proposed for LSRM. In the scheme, the position is estimated by the injection of a series of small current into phase winding and measurement of the increase of phase current. The preliminary experiments in position detection are performed on the proposed LSRM. The experimental results confirm that the scheme is effective for position detection of LSRM.

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Section: Introductionmentioning

confidence: 99%

“…Another group of this kind of methods is based on modulated frequency injection. By applying a small high frequency sinusoidal voltage to an idle phase, the phase inductance will be encoded in the amplitude and phase of the sensing current [6]. And a resonance based high frequency injection was proposed [7].…”

Section: Introductionmentioning

confidence: 99%

Experiments in the Position Detection of Linear Switched Reluctance Motor

Zhao

Cheung

Gan³

et al. 2006

2006 2nd International Conference on Power Electronics Systems and Applications

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“…The calculation of flux linkages by equation (10), helpful in computing estimated angle for the operation of sensorless SRM drive.…”

Section: Flux Linkage Estimationmentioning

confidence: 99%

Sensorless Control of Switched Reluctance Motor Drive with Fuzzy Logic Based Rotor Position Estimation

Gupta¹,

Kumar²,

Bishnoi³

2010

IJCA

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This paper describes an accurate rotor position estimation, which is very important for high performance operation of Switched Reluctance Motor (SRM). Earlier, a rotor position sensor has been used for sensing the rotor position. The position sensor used in SRM drives have the disadvantages of additional cost, electrical connections, mechanical alignment problems, less suitability to space restricted applications and significant disadvantage of being inherent source of unreliability. These bottlenecks have been motivated for the development of several sensorless techniques in the recent years. Here, a proposed sensorless scheme based on fuzzy system is used to overcome the disadvantages of sensor scheme. The rotor position or angle can be estimated by using the unique relationship between flux linkage and phase current in term of fuzzy rule base. Both simulation and experiment results on a Digital Signal Processor (DSP) based real time drive are presented to show the effectiveness of this scheme. The proposed scheme is provided to demonstrate the validity for implementing it to real world problems.

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“…which yields (6) Therefore, the voltage equations for the two rotor positions can be rewritten as (7) (8)…”

Section: ) Current Regulation With Pwm-the Current Is Regulatedmentioning

confidence: 99%

“…Several indirect rotor position methods have been proposed in the literature, all making use of the inductance variation in one way or another. For example, the chopping current detection technique by Acarnley et al [1], the flux-current detection technique by Lyons et al [2] and Hedlund [3], the impedance sensing by Acarnley et al [1] and MacMinn et al [4], the modulation techniques by Ehsani et al [5], [6], the mutually induced voltage by Husain [7], the resonant method by Laurent et al [8], and the open-loop control by Bass et al [9]. A more sophisticated method is the state observer presented by Lumsdaine [10], but it requires a powerful digital signal processor (DSP).…”

Section: A Reviewmentioning

confidence: 99%

A new sensorless method for switched reluctance motor drives

Gallegos-López

Kjær

Miller

1998

IEEE Trans. on Ind. Applicat.

117

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Abstract-This paper describes a new method for indirect sensing of the rotor position in switched reluctance motors (SRM's) using pulsewidth modulation voltage control. The detection method uses the change of the derivative of the phase current to detect the position where a rotor pole and stator pole start to overlap, giving one position update per energy conversion. As no a priori knowledge of motor parameters is required (except for the numbers of stator and rotor poles), the method is applicable to most SRM topologies in a wide power and speed range and for several inverter topologies. The method allows modest closed-loop dynamic performance. To start up the motor, a feedforward stepping method is used which assures robust startup (even under load) from standstill to a predefined speed at which closed-loop sensorless operation can be applied. Experimental results demonstrate the robust functionality of the method with just one current sensor in the inverter, even with excitation overlap, and the sensorless operation improves with speed. The method is comparable to the back-EMF position estimation for brushless dc motors in principle, performance, and cost. A detailed operation and implementation of this scheme is shown, together with steady-state and dynamic transient test results.

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New modulation encoding techniques for indirect rotor position sensing in switched reluctance motors

Cited by 129 publications

References 8 publications

Experiments in the Position Detection of Linear Switched Reluctance Motor

Experiments in the Position Detection of Linear Switched Reluctance Motor

Sensorless Control of Switched Reluctance Motor Drive with Fuzzy Logic Based Rotor Position Estimation

A new sensorless method for switched reluctance motor drives

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