Adaptive control schemes for improving dynamic performance of efficiency-optimized induction motor drives

Kumar, Navneet; Chelliah, Thanga Raj; Srivastava, S. P.

doi:10.1016/j.isatra.2015.02.011

Cited by 28 publications

(17 citation statements)

References 36 publications

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“…By comparing the bandwidth of the stator currents control loop with that of the rotor flux it is clear that the slower dynamic can be analyzed separately from the fast dynamic. This strategy is widely used for both FOC [1][2][3]10,31] and other IM control schemes [11][12][13][14][15] and allows neglecting the stator currents dynamics.…”

Section: Im Flux-torque Modelmentioning

confidence: 99%

“…This has been achieved in [15,16], where the motor torque is maximized by adjusting the values of the flux. In general, the bandwidth of the flux dynamics is lower than that of the torque.…”

Section: Constant or Slowly Varying Flux Magnitude Schemesmentioning

confidence: 99%

“…It is in this second step that most FOC schemes are introduced. Control strategies other than FOC may be used in the second step while preserving the stator currents control loop; however, they are akin to FOC in this regard [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…Ref. [15] successfully presents an approach that considers a current-fed machine and the control of the fluxtorque subsystem; however, neither the resulting coupling nor the effect of perturbations over this coupling are discussed. Although the flux-torque subsystem has been extensively studied, the dynamical aspects of its cross-coupling are yet to be addressed.…”

Section: Introductionmentioning

confidence: 99%

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Flux-torque cross-coupling analysis of FOC schemes: Novel perturbation rejection characteristics

et al. 2015

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Field oriented control (FOC) is one of the most successful control schemes for electrical machines. In this article new properties of FOC schemes for induction motors (IMs) are revealed by studying the cross-coupling of the flux-torque subsystem. Through the use of frequency-based multivariable tools, it is shown that FOC has intrinsic stator currents disturbance rejection properties due to the existence of a transmission zero in the flux-torque subsystem. These properties can be exploited in order to select appropriate feedback loop configurations. One of the major drawbacks of FOC schemes is their high sensitivity to slip angular velocity perturbations. These perturbations are related to variations of the rotor time constant, which are known to be problematic for IM control. In this regard, the effect that slip angular velocity perturbations have over the newly found perturbation rejection properties is also studied. In particular, although perturbation rejection is maintained, deviations to the equilibrium point are induced; this introduces difficulties for simultaneous flux and torque control. The existence of equilibrium point issues when flux and torque are simultaneously controlled is documented for the first time in this article.

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Section: Im Flux-torque Modelmentioning

confidence: 99%

Section: Constant or Slowly Varying Flux Magnitude Schemesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Flux-torque cross-coupling analysis of FOC schemes: Novel perturbation rejection characteristics

et al. 2015

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“…Novel methods for loss minimization by regulating the controlling variables related to motor try to maintain this balance. The emergence of power electronic devices as well as voltage source inverters (VSI), flux control is obtained easily [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

A New Approach to Improve Induction Motor Performance in Light-Load Conditions

Hesari¹,

Hoseini²

2017

Journal of Electrical Engineering and Technology

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-Induction motors often reach their maximum efficiency at the nominal load. In most applications, the machine load is not equal to the nominal load, thus reduces the motor efficiency and turns a greater percent of power into loss. In this paper, the induction motor control problem has been investigated to reduce the system losses. The Field Oriented Control method (FOC) has been employed in this paper. In this research, the mathematical equations related to system losses are calculated in relation to torque and speed, and then the q-and d-axis are summarized according to the current components. After that, the proposed method is applied along with d-and q-axis. In the recent three decades, many techniques have been suggested to improve the induction motor performance using smart and non-smart methods. In this paper, a new PSO-Fuzzy method have used in real time. The fuzzy logic method serves as speed controller in q-axis and PSO algorithm controls the optimum flux in d-axis. It will be proved that the use of this combined method will lead to a significant improvement in motor efficiency.

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Energy efficient operation of induction motor drives: Economic and environmental analysis in cement manufacturing

Choudhary

Dubey

2018

Env Prog and Sustain Energy

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Energy consumption is increasing day by day and so greenhouse gas emissions. Heavy industries, which consume almost 50% of total energy produced, there is a strong need to implement energy efficiency measures. The electric motor driven systems (EMDS) such as fans, blowers, ventilators, pumps, and compressors are widely used in industries and consume 80% of total industrial electricity. A huge electrical energy saving potential exists with these applications since they frequently come under partial load condition. The optimal flux operation of motors provides significant savings in such conditions, especially in the steady‐state. There are two methods, namely, loss model control (LMC) and search control (SC) used for finding an optimal flux value. In this paper, a case study has been performed to analyze the efficiency improvement of motors of an industrial unit by utilizing superior features of LMC and SC techniques together in a novel way. A total of 65 EMDS are being considered as energy‐efficiency load points for the detailed investigation of a typical integrated cement‐manufacturing unit, located at Durg district, C.G., India. The efficiency improvement validation has been carried out on the MATLAB platform. Significant savings of $2.19 million per annum in energy expenditures, 48,899 tons less per annum of combusted coal and nearly 50,366 tons less greenhouse emissions are estimated at 1 yr. The projected energy use will be in line with “good practice” benchmarks for the sector as well help in “carbon emission reduction target” of state and country. © 2018 American Institute of Chemical Engineers Environ Prog, 38: 672–679, 2019

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Adaptive control schemes for improving dynamic performance of efficiency-optimized induction motor drives

Cited by 28 publications

References 36 publications

Flux-torque cross-coupling analysis of FOC schemes: Novel perturbation rejection characteristics

Flux-torque cross-coupling analysis of FOC schemes: Novel perturbation rejection characteristics

A New Approach to Improve Induction Motor Performance in Light-Load Conditions

Energy efficient operation of induction motor drives: Economic and environmental analysis in cement manufacturing

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