Iso efficiency contours as a concept to characterize variable speed drive efficiency

Deprez, Wim; Lemmens, Joris; Vanhooydonck, Dirk; Symens, Wim; Stockman, Kurt; Dereyne, Steve; Driesen, Johan

doi:10.1109/icelmach.2010.5607991

Cited by 21 publications

(9 citation statements)

References 9 publications

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“…The finite number of the operating points recorded can afterwards be extended to a continuous efficiency map by interpolation and extrapolation [36]. It should be noted that the off-road method assumes operation in steady state to calculate the efficiency of each operating point, thus neglecting transient states.…”

Section: Off-road Methods Characterisationmentioning

confidence: 99%

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Characterisation of the electric drive of EV: on‐road versus off‐road method

Dépature

Lhomme

Bouscayrol

et al. 2017

IET Electrical Systems in Transportation

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For system design, analysis of global performance and energy management of electric vehicles, it is common to use the efficiency map of electric traction drive. The characterization of the efficiency map with high accuracy is then an important issue. In this paper an onroad method and an off-road method are compared experimentally to determine the efficiency map of electric drive of electric vehicles. The off-road method requires a dedicated experimental test bed, which is expensive and time-consuming. The on-road method is achieved directly in-vehicle. Experimental data, recorded during an on-road driving cycle, are used to determine the efficiency map using non-intrusive measurements from GPS antenna, voltage and current sensors. A versatile experimental setup is used to compare both methods on the same platform. A maximal efficiency difference of 6% is achieved in most of the torque-speed plane. It is shown that, in an energetic point of view, both methods yield similar results.

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Section: Off-road Methods Characterisationmentioning

confidence: 99%

“…Consequently, all operating points can be covered by changing the reference values in the matrix { T ed‐ref , Ω ed‐ref }. The finite number of the operating points recorded can afterwards be extended to a continuous efficiency map by interpolation and extrapolation [36].…”

Section: Characterisation Of the Electric Drive Of A Commercial Evmentioning

confidence: 99%

Characterisation of the electric drive of EV: on‐road versus off‐road method

Dépature

Lhomme

Bouscayrol

et al. 2017

IET Electrical Systems in Transportation

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“…The validation of the proposed algorithm is performed by conducting motor energy efficiency measurements. To do so, ISO efficiency maps are applied of which the concept has been defined for variable speed drives in [42,43]. Other authors expanded the scope of the technique towards gearboxes [44] and variable transmissions [45] with the objective to adequately compare devices for their entire operating range.…”

Section: Motor Energy Efficiencymentioning

confidence: 99%

Energy‐efficient sensorless load angle control of a BLDC motor using sinusoidal currents

Viaene¹,

Verbelen²,

Derammelaere

et al. 2018

IET Electric Power Applications

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Nowadays, most brushless DC (BLDC) motors use Hall sensors or sensorless algorithms based on backelectromotive force (back-EMF) sensing to detect rotor position information. These methods detect the commutation moments but imply the use of rectangular stator currents which, according to recent literature, limits the energy efficiency. In this study, sinusoidal stator currents are used to increase the motor energy efficiency. As a consequence, standard control based on the feedback of the Hall sensors or based on sensorless techniques detecting the back-EMF zero-crossing cannot be used. Therefore, the authors propose a load angle control algorithm for BLDC motors without using position and speed sensors. The objective is to obtain energy-efficient sensorless control for the BLDC motor based on the measurement of only two current and one voltage signal. The energy saving potential of the proposed method is especially outspoken for fixed speed applications with varying loads, which are typical BLDC applications. Experimental results are presented to validate the proposed method. Energy efficiency measurements over the whole operating range of the BLDC motor are included and show an energy saving potential up to 9.5%.

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“…Due to the complexity to describe the iron losses and stray losses of electric drives, analytical models for energy consumption exist only for special cases such as an induction motor which is investigated in [9]. However, black box models as ISO efficiency contours can be built from measurement data [21]. In the present work, measurement data is employed to build a quadratic model which allows for efficient optimization.…”

Section: Introductionmentioning

confidence: 99%

Energy efficiency optimization by automatic coordination of motor speeds in conveying systems

Windmann

Niggemann

Stichweh³

2015

2015 IEEE International Conference on Industrial Technology (ICIT)

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This paper addresses the optimization of energy flows between electric drives in conveying systems. Thereby, load peaks and the feedback of electric energy into the grid are reduced. The approach is based on the solution of a mixed integer quadratic optimization problem which incorporates models for energy flows and energy consumption of the electric drives. Models for energy flows and energy consumption can be parametrized from sensor data. Besides, movement constraints such as start positions, end positions and time limits are taken into account. The solution of the optimization problem is accomplished in realtime by application of standard solvers. Experimental results show that the proposed methods allows recovering regenerative energy of electric drives as motoric power for other drives. Integration into material flow planning of an automated warehouse is straightforward so that an inexpensive and simply usuable way for power saving in intralogistics is presented

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Iso efficiency contours as a concept to characterize variable speed drive efficiency

Cited by 21 publications

References 9 publications

Characterisation of the electric drive of EV: on‐road versus off‐road method

Characterisation of the electric drive of EV: on‐road versus off‐road method

Energy‐efficient sensorless load angle control of a BLDC motor using sinusoidal currents

Energy efficiency optimization by automatic coordination of motor speeds in conveying systems

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