Model-based current control of AC machines using the internal model control method

Harnefors, Lennart; Nee, Hans‐Peter

doi:10.1109/28.658735

Cited by 544 publications

(307 citation statements)

References 7 publications

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“…Typically, the bandwidth is limited to no more than 20% of the switching frequency, [3]. For modern IGBT devices, it is possible to achieve values of of 2 kHz [4].…”

Section: Internal Model Controlmentioning

confidence: 99%

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Optimal controller gains for inner current controllers in VSC inverters

Giles¹,

Reguera²,

Roscoe³

2015

International Conference on Renewable Power Generation (RPG 2015)

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The standard method for controlling an IGBT inverter (or any VSC inverter for that matter) is by vector current control. This control system consists of two cascaded control loops. One possible realisation of the outer controller is to control the DC bus voltage such that no more power is taken off the DC bus than is available. This creates a current reference, which is fed into the inner current controller. The inner current controller then regulates the current passing through the IGBT such that the desired power is dispatched onto the grid. Whilst most research treats the grid connection as a simple RL circuit, there is little consistency on the method by which the gains of the inner current controller are selected. Internal model control, modulus optimum and root locus methods are just a few of the methods used to find the gains. However, it is not clear which of these methods yields the best performance of the inner current controller. This work suggests that tuning on phase margin or manually tuning may not achieve the best results.

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“…Typically, the bandwidth is limited to no more than 20% of the switching frequency, [3]. For modern IGBT devices, it is possible to achieve values of of 2 kHz [4].…”

Section: Internal Model Controlmentioning

confidence: 99%

“…Typically, the phase reactor has a resistance and inductance of pu and pu [1,3]. For that reason, these values are used in the simulation.…”

Section: Simulation Setupmentioning

confidence: 99%

Optimal controller gains for inner current controllers in VSC inverters

Giles¹,

Reguera²,

Roscoe³

2015

International Conference on Renewable Power Generation (RPG 2015)

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“…1 Various simplified methods of studying the dynamics of IM have been investigated and used in power system transients, stability studies and drive systems control [6][7][8][9] . All these models are developed for VSI-IM drives.…”

Section: Introductionmentioning

confidence: 99%

Reduced Order Models of a Current Source Inverter Induction Motor Drive

Al-Abbas¹

2009

American J. of Engineering and Applied Sciences

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Problem Statement: The current source inverter induction motor (CSI-IM) drive was widely used in various industries. The main disadvantage of this drive was nonlinearity and complexity. This work was done to develop a simple drive systems models. Approach: The MATLAB/SIMULINK software was used for system modeling. Three reduced models were developed by choosing specific frame, neglecting stator transients and ignoring stator equations. Results: The dynamic performance of the models was examined in open loop form for a step change in control variable (the input voltage) as well as for step change in disturbance (mechanical load).Conclusion: The three models were equivalent in steady state. The error of these models in the transient response was less than 5 %, with the exception of the time performances of the transient model to step change of supply voltage. Recommendations: All three models were suggested to be used for designing torque control systems. The detailed and stator equation models were recommended to be used in speed control design.

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“…1 was supplemented with a speed controller in some experiments. The digital implementation of the observer is given in the [11], [12] including the decoupling of the back-emf voltages was used. The bandwidth of the current controller was 8 p.u.…”

Section: Control Systemmentioning

confidence: 99%

Parameter sensitivity of full-order flux observers for induction motors

Hinkkanen¹,

Luomi²

Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344)

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Abstract-This paper deals with flux estimation for induction motor drives. The equations of the parameter sensitivity of both the rotor flux estimation and the torque production are derived for a full-order flux observer. Based on the parameter sensitivity analysis, practical methods of designing robust observer gains combining the current model and the voltage model are proposed. The proposed gains are easy to tune and lead to a simple observer structure. Experimental results show that for inaccurate parameter estimates, both the steady-state and dynamic errors in the produced torque are small as compared to the current model. Furthermore, high-speed operation is possible without modelling the magnetic saturation even if motor parameters are highly erroneous.

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Model-based current control of AC machines using the internal model control method

Cited by 544 publications

References 7 publications

Optimal controller gains for inner current controllers in VSC inverters

Optimal controller gains for inner current controllers in VSC inverters

Reduced Order Models of a Current Source Inverter Induction Motor Drive

Parameter sensitivity of full-order flux observers for induction motors

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