Design and performance of a rotor position sensing system for a switched reluctance marine propulsion unit

Richardson, Kenneth; Pollock, C.; Flower, John

doi:10.1109/ias.1996.557011

Cited by 5 publications

(3 citation statements)

References 3 publications

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“…La compacité et une plus grande manoeuvrabilité sont les améliorations recherchées. Dans les petits engins sous marins, on a cherché à intégré le moteur à l'hélice (comme dans les ventilateurs), ainsi un moteur à réluctance variable de 7,5 kW à 1200 tr/mn a été conçu pour réaliser une unité de propulsion de 350 N [30]. Le rotor comprend 20 dents, les espaces interpolaires sont remplis avec un matériau amagnétique pour réduire les pertes hydrodynamiques et le stator est un simple secteur de 72° comprenant un système triphasé à 6 pôles bobinés.…”

Section: ◆ ◆ ◆ ◆ Propulsion Navale (Sous-marins Bateaux)unclassified

Les entraînements électromécaniques directs : diversité, contraintes et solutions

Multon¹

1999

R.E.E.

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Electromechanical direct drives represent ultimate simplification of the electromechanical conversion systems because of they permit removal of parts of transmission system : reduction and multiplier gears, rotating to linear movement transformation... This simplification of the transmission system is employed since always in certain applications where mechanical requirements are adjust easily with classical motors (speed from about 1000 to 3000 rpm). But in very low speed and high torque, very high speed as well as linear drives, establishment takes slowly. In this paper, we aim to give numerous application examples where direct drives exist or emerge. We recall too their specific constraints. Finally, we develop a specific chapter on feasibility limits of rotating very high speed electromagnetic motors.

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Section: ◆ ◆ ◆ ◆ Propulsion Navale (Sous-marins Bateaux)unclassified

Les entraînements électromécaniques directs : diversité, contraintes et solutions

Multon¹

1999

R.E.E.

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“…Yet another method [22] involves a system with sense coils installed on the rotor and a pair of brushes and slip rings are used to collect position information. Another method [23] uses a passive sensing system for a marine propulsion unit consisting of sense coils and an analogue flux estimator circuit. However, this method requires the motor to start in open loop because the start‐up sequence to produce torque in the desired direction cannot be determined at standstill.…”

Section: Introductionmentioning

confidence: 99%

Torque ripple minimisation of switched reluctance motor using sense coils

Reddy

Vemula

Keerthipati

2020

IET Electric Power Applications

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Switched reluctance motor (SRM) offers several advantages compared to conventional motors such as low cost, rugged design and good high-speed performance. Torque ripple and the associated acoustic noise and vibrations have been a challenge for its application in low and medium power applications. The torque ripple is due to double salient structure and nonlinear magnetic characteristics of the machine. This study presents a sense coil system to measure instantaneous inductance that represents the non-linearity and saturation effects. The current profile is generated from the measured inductance to minimise the torque ripple and reduce the copper losses. The speed of motor is derived from the measured inductance thereby eliminating need for an external sensor. The effect of temperature and asymmetries in machine construction are compensated due to the dynamic nature of inductance measurement. The proposed method is implemented on a SoC FPGA to control the speed of SRM with reduced torque ripple.

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“…While this approach is simple and more suitable for high speed, single-pulse operation, it needs a large amount of lookup tables and can have significant estimation errors at low speed, chopping mode operation where the effect of the winding resistance becomes significant. Flux or inductance variation can be obtained directly using sensing coils [8], [9], but the extra coils may cause coupling with main power signals and add to the manufacturing cost and effort.…”

Section: Introductionmentioning

confidence: 99%

Low-Cost Position Sensorless Switched Relutance Motor Drive Using a Single-Controllable Switch Converter

Yang¹,

Kim²,

Krishnan³

2012

Journal of Power Electronics

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Elimination of rotor position sensors mechanically coupled with the rotor shaft is attractive to variable speed drives primarily due to increased system reliability and cost reduction. In this regard, search for a simple and robust position sensorless control has been intensified in past few years specifically for low-cost, high-volume applications such as home appliances. This paper describes a new parameter insensitive position sensorless control for switched reluctance motor (SRM) drives satisfying such a need in this market segment. Two consecutive switch-on times of the controllable switch in hysteresis current control are compared to estimate the rotor position and speed. The proposed sensorless control algorithm is very simple to implement since it does not depend on extensive computation or any additional hardware. In addition, the proposed method is robust in that its dynamic performance is least affected by system parameter variations. The proposed approach is demonstrated on a single-controllable-switch-converterdriven SRM with two-phases that lends itself to a system with low cost and compact packaging which comes close to the intended applications. Analysis and simulation results followed by experimental verification are presented to demonstrate the feasibility of the proposed sensorless control method.

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Design and performance of a rotor position sensing system for a switched reluctance marine propulsion unit

Cited by 5 publications

References 3 publications

Les entraînements électromécaniques directs : diversité, contraintes et solutions

Les entraînements électromécaniques directs : diversité, contraintes et solutions

Torque ripple minimisation of switched reluctance motor using sense coils

Low-Cost Position Sensorless Switched Relutance Motor Drive Using a Single-Controllable Switch Converter

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