A control scheme for direct torque and flux of induction machines based on the stator field orientation method is proposed. With proposed predictive scheme, an inverter duty cycle directly errors, transient reactance machine, estimated value voltage behind reactance. presented by which a space vector can be calculated in order to deadbeat fashion. The then using PWM technique. An alternative modulation also presented.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML"...

This paper proposes and formalizes a comprehensive experimental approach for the identification of magnetic model synchronous electrical machines all kinds. The procedure is based on controlling current machine under test while this driven at constant speed by another regenerative electric drive. Compensation stator resistance inverter voltage drops, iron loss, operating temperature issues are taken into account. A road map implementation given, different types hardware setups. Experimental...

In this paper, a simplified thermal model for variable-speed self-cooled induction motors is proposed and experimentally verified. The based on simple equations that are compared with more complex well known in the literature. allows one to predict over temperature main parts of motor, starting from measured or estimated losses machine. description setup reported detail. Finally, used define correct power derating pulsewidth-modulation motor drive.

A design approach oriented to the minimization of torque ripple is presented for synchronous reluctance motors transverse-laminated type. First, possible types rotors are classified and more suited rotor structure evidenced, be matched a given stator. Then, inner described, pointing out low-ripple measures. Lastly, experimental results from three different rotors; they confirm validity proposed approach.

We propose a new approach for predicting iron losses in soft magnetic materials with any voltage supply, starting from the knowledge of sinusoidal or pulsewidth modulation supply. The model is based on separation loss contributions due to hysteresis, eddy currents, and excess two supplies. Since contribution depends supply characteristics, it possible find direct mathematical relationship between characteristics. As consequence, an prediction can be obtained if does not produce hysteresis...

A design approach oriented to minimization of torque-ripple is presented, for synchronous reluctance motors the transverse-laminated type. First, possible types rotors are classified and more suited rotor structure evidenced, be matched a given stator. Then, inner described, pointing-out low-ripple measures. Last, experimental results given, from three different rotors: they confirm validity proposed approach.

Permanent-magnet-assisted synchronous reluctance motors are well suited to zero-speed sensorless control because of their inherently salient behavior. However, the cross-saturation effect can lead large errors on position estimate, which is based differential anisotropy. These quantified in this paper as a function working point. The that calculated then found be good accordance with purposely obtained experimental measurements

The influence of state feedback coupling in the dynamics performance power converters for stand-alone microgrids is investigated. Computation and pulsewidth-modulated (PWM) delays are main factors that limit achievable bandwidth current regulators digital implementations. In particular, decoupling degraded because these delays. Two techniques to improve transient response system investigated, named nonideal ideal capacitor voltage decoupling, respectively. latter solution consists leading on...

The cross-saturation phenomenon in synchronous reluctance motors is extensively analyzed, with a main reference to of the transverse-laminated type. A mixed theoretical and experimental approach adopted, aiming at definition motor's behavior when large overload currents are driven up ten times rated current. As consequence, special test measuring procedure has been adopted. obtained results used check validity adopted model prove unexpected performance this motor.

Iron loss, traditionally ignored in vector control schemes, has recently attracted more attention as a cause of detuned operation rotor-flux-oriented induction machines. Appropriate mathematical tools, that enable evaluation detuning due to iron have become available, and these been used so far only assessment for rated speed the constant flux region. The available studies are based on measurement losses with voltage supply frequency. This paper attempts provide detailed treatment loss...

Synchronous reluctance (SyR) motors are well suited to a zero-speed sensorless control, because of their inherently salient behavior. However, the cross-saturation effect can lead large errors on position estimate, which is based differential anisotropy. These quantified in paper, as function working point. The so-calculated then found good accordance with purposely obtained experimental measurements. impact amplitude carrier voltage pointed out, leading mixed (carrier injection plus...

Motor efficiency has to be measured or calculated in accordance with international standards. The most important standards are the IEEE 112-B, IEC 34-2, and JEC 3 . In this paper, a comparison of measurement procedures defined by these is reported, together some comments on prescribed methodologies. based experimental results obtained tests four general-purpose three-phase induction motors. stray-load loss represents critical key for correct evaluation motor efficiency. For reason, analysis...

The aim of this paper is to investigate and compare the torque behavior induction motors transverse laminated synchronous reluctance motors. Each motor compared with a motor, that has same stator lamination winding but, obviously, different rotor. thermal analysis been based on fully experimental approach results have shown can give from 10% 25% more than corresponding depending size importance I.M. rotor losses. comparison two types made at equal, measured temperature. In addition,...

The control of Brushless Permanent Magnet Motors require rotor position information that can be measured by means a sensor. motion sensorless aims at eliminating the motor sensor and its corresponding electronic conditioning circuits, cabling connectors. Besides clear cost reduction, drives have better reliability when compared with their sensor-based counterparts. research conducted in last two decades has provided many different solutions are used applications. Nevertheless, literature...

A self-tuning control scheme for stator-flux field-oriented induction machine drives in electric vehicles operating over a wide speed range is discussed this paper. The stator flux can be determined accurately from the terminal voltage when at high speed. However, low speed, resistance must known to calculate flux. problem of calculating entire addressed. rotor found and time constant. flux, then calculated directly By alternating between these two methods determining operation achieved,...

In this paper, the key points in design of synchronous reluctance motors are first evidenced and discussed, that is, choice rotor type, stator-rotor joint design, optimization structure. A purposely designed finite-element code is then introduced validated, on basis properly obtained experimental data. Measured computed torques compared, with emphasis evaluation torque ripple. Last, method used to illustrate some aspects show torque-ripple performance different types machine

In this paper, the thermal behavior of two induction motors (2.2 and 4 kW, four poles) synchronous reluctance [(SynRMs) transverse-laminated] are investigated compared. Both motor types use same stator but have different rotors. Using a lumped-parameter simulation program, analysis has been also carried out, obtained results compared with experimental ones. A direct comparison thus made for constant load average copper temperature conditions. Inasmuch as SynRM negligible rotor losses motor,...

The sensorless control of permanent-magnet-assisted synchronous reluctance (PMASR) motors is investigated, in order to conjugate the advantages with full exploitation allowed operating area, for a given inverter. An additional pulsating flux injected d-axis direction at low and zero speed, while it dropped out, large save voltage loss. A flux-observer-based scheme used, which includes an accurate knowledge motor magnetic behavior. This leads, general, good robustness against load variations,...

Modern interior permanent magnet motors, suited to large constant-power speed ranges, have a multiple flux-barrier rotor structure and show quite complex magnetic behavior. In this paper, the flux-current relationship of such motors is analyzed, simplified but effective model cross-saturation phenomenon proposed verified by experiment. addition, new flux variables are introduced that allow rigorous splitting permanent-magnet (PM) reluctance torques. It shown PM contribution torque larger...

The aim of this paper is to investigate and compare the performances two induction motors transverse laminated synchronous reluctance (induction motor nameplate data: 2.2 4 kW, 380 V, 50 Hz, pole). Each compared with a motor, that has same stator lamination winding, but, obviously, different rotor. analysis been based both on an analytical experimental approach. results have shown capable around 10% 15% larger rated torque for given frame size. direct comparison types made constant load...

The decoupling of the capacitor voltage and inductor current has been shown to improve significantly dynamic performance source inverters in standalone applications. However, computation pulse width modulation delays still limit achievable bandwidth. In this paper, a discrete-time domain modeling an LC plant with consideration delay sample-and-hold effects on state feedback cross-coupling is derived. From formulation, controllers wide bandwidth good relative stability properties are...

The sensorless control of the transverse-laminated synchronous reluctance motor is introduced, pointing out negative effect cross saturation. Then, an observer-based scheme proposed which solves this problem. Thus, a very good robustness against load variations achieved. Moreover, working speed extended from zero to maximum speed, including flux-weakening feature. This obtained by combined method rotor position estimation, making use both electromotive-force-based estimation and signal...

Based on a (d,q) synchronous frame, the control problems of reluctance motors are outlined. In particular, effect magnetic saturation, core loss, and angular measurement errors various types evidenced. A flux-observer-based scheme, capable overcoming most above problems, is proposed. The proposed has been implemented prototype drive, adopting 17-N/spl middot/m 8000-r/min motor. experimental results show quite good performance, with particular emphasis those applications which require large...

Based on the (d, q) synchronous frame, control problems of reluctance motors are outlined. In particular, effects magnetic saturation, core losses and angular measurement errors various types evidenced. A flux-observer based scheme is proposed, capable overcoming most above problems. The proposed has been implemented a prototype drive, adopting 17 Nm, 8,000 RPM motor. Experimental results show quite good performance, with particular emphasis those applications which require large...