Implicit rotor-position sensing using motor windings for a self-commutating permanent-magnet drive system

Binns, K.J.; Shimmin, D.W.; Al-Aubidy, Kasim M.

doi:10.1049/ip-b.1991.0004

Cited by 20 publications

(5 citation statements)

References 5 publications

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“…These winding inductances are a function of the rotor position. In [13], the inductance is calculated by injecting a high frequency current or voltage carrier signal in one winding and measuring the induced voltage or current. With this technique and a proper signal processing technique, it is possible to extract the rotor position.…”

Section: Methods Based On Inductance Variation Of the Machinementioning

confidence: 99%

Sensorless control of PM synchronous motors and brushless DC motors - an overview and evaluation

Montesinos¹,

Galceran²,

Blaabjerg³

et al. 2005

2005 European Conference on Power Electronics and Applications

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This paper provides a review of the literature addressing sensorless operation methods of PM brushless machines. The methods explained are state-of-the-art of open and closed loop control strategies. The closed loop review includes those methods based on voltage and current measurements, those methods based on back emfmeasurements, and those methods based on novel techniques not included in the previous categories. The paper concludes with a comparison table including all main features for all control strategies.

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Section: Methods Based On Inductance Variation Of the Machinementioning

confidence: 99%

Sensorless control of PM synchronous motors and brushless DC motors - an overview and evaluation

Montesinos¹,

Galceran²,

Blaabjerg³

et al. 2005

2005 European Conference on Power Electronics and Applications

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“…Rewriting (11), we obtain (13) Substituting (3), one can remove the flux variables (14) After simplification, the voltage command feedforward terms become a very simple set (15) Fig. 3 depicts the system with the generation of these highfrequency voltage commands.…”

Section: Principles Of a New Estimation Methodsmentioning

confidence: 99%

Rotor position and velocity estimation for a salient-pole permanent magnet synchronous machine at standstill and high speeds

Corley

Lorenz

1998

IEEE Trans. on Ind. Applicat.

742

321

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Abstract-This paper addresses self-sensing ("sensorless") control of salient-pole permanent magnet synchronous motors (PMSM's). The major contribution of this work is the introduction of a simple-to-implement estimation technique that operates over a wide speed range, including zero speed. The technique achieves simplicity by decoupling the inherent cross-coupling in PMSM's. The technique utilizes the dependence of inductance on rotor position in interior permanent magnet machines to produce position and velocity estimates both for field orientation and for all motion control of the drives. The technique functions in a manner similar to a resolver and resolver-to-digital converter (RTDC) sensing system, whereby in the proposed technique the motor acts as the electromagnetic resolver and the power converter applies carrier-frequency voltages to the stator which produce high-frequency currents that vary with position. The sensed currents are then processed with a heterodyning technique that produces a signal that is approximately proportional to the difference between the actual rotor position and an estimated rotor position. This position error signal and a torque estimate are then used as inputs to a Luenberger style observer to produce parameter insensitive, zero lag, position and velocity estimates.Index Terms-Permanent magnet motor control, self sensing, sensorless control, sensorless tranducerless field orientation, sensorless vector control, transducerless control. NOMENCLATURE SuperscriptŝEstimated quantities. Commanded quantities. Stator reference frame. Rotor reference frame. Estimated rotor reference frame.

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“…When the machine is excited by a balanced, three-phase, carrier signal voltage excitation, current will be induced, which can be modeled by (8) where magnitude of the th component of the negative sequence current; harmonic number of the saliency causing the th component (can be positive, negative, or zero); angular position of the saliency causing the th component; phase shift of the th component relative to the reference system. The magnitude of the individual components of the current can be approximated by (9) (10) where is the differential stator transient inductance associated with the th saliency.…”

Section: Multiple Saliencies Machine Modelmentioning

confidence: 99%

“…The spatial saliency tracking methods can be further subdivided into two groups, depending on whether they use the fundamental excitation of the machine [5]- [8] or a separate excitation from the fundamental excitation [9]- [22]. Because these methods are tracking a spatial saliency, they are either less sensitive or completely insensitive to parameter variations.…”

mentioning

confidence: 99%

Using multiple saliencies for the estimation of flux, position, and velocity in AC machines

Degner

Lorenz²

1998

IEEE Trans. on Ind. Applicat.

383

105

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Abstract-This paper presents an improved method of estimating flux angle, rotor position, and velocity by tracking the position of spatial saliencies in an ac machine. Specifically, a machine model is presented which accurately models the behavior of ac machines with multiple spatial harmonic saliencies. The effects of multiple spatial harmonic saliencies on the estimation of flux angle, position, and velocity is analyzed, and methods are presented utilizing multiple spatial harmonic saliencies to provide wide bandwidth, high accuracy estimates of flux angle, rotor position, and velocity.

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Implicit rotor-position sensing using motor windings for a self-commutating permanent-magnet drive system

Cited by 20 publications

References 5 publications

Sensorless control of PM synchronous motors and brushless DC motors - an overview and evaluation

Sensorless control of PM synchronous motors and brushless DC motors - an overview and evaluation

Rotor position and velocity estimation for a salient-pole permanent magnet synchronous machine at standstill and high speeds

Using multiple saliencies for the estimation of flux, position, and velocity in AC machines

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