Fast and reliable commissioning of AC variable speed drives by self-commissioning

Schierling, H.

doi:10.1109/ias.1988.25105

Cited by 17 publications

(6 citation statements)

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“…The stator resistance at start-up is also estimated, similar to offline estimation proposed in [13]. For improving the accuracy at very low speed and heavy motor duties extra methods are necessary for updating the resistance estimate during the drive (a) Compensation OFF, 50ms/div (b) Compensation ON, 50ms/div operation like in [7] and [6].…”

Section: Flux Estimation Errormentioning

confidence: 99%

Self-Commissioning Algorithm for Inverter Non-Linearity Compensation in Sensorless Induction Motor Drives

Pellegrino

Guglielmi

Armando

et al. 2008

2008 IEEE Industry Applications Society Annual Meeting

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Sensorless Field Oriented Control (SFOC) of Induction Motor (IM) drives estimate the mechanical position of the rotor and the field orientation by means of the motor voltage and current measures. In many cases, the motor voltages measures are substituted by the inverter commands, and the flux estimation is based on the stator model of the machine, i.e. the integration of back EMF voltages. With closed loop current control, the inverter nonlinearities (dead-time and onstate voltage drops) introduce a distortion in voltage estimation whose effect is particularly evident at low speed: lost of accuracy in flux estimation and reduced performance of the field oriented control. Most of the techniques for the compensation of the inverter nonlinear effects in the literature are based on off-line identification of the inverter model, with heavy offline post-processing. The goal of the paper is to present a simple and accurate method for on-line identification of the inverter parameters at the drive start-up. The method requires very few extra processing blocks, integrated into the main control code and it is based on the evaluation of the feedback signal of any closed loop flux observer. It is thus a general method, valid for all those drives where the flux observer is based on back-EMF integration, e.g. synchronous IPM drives. The self-commissioning algorithm is presented and tested here for a sensorless induction motor drive, controlled by a fixedpoint industrial DSP. The feasibility and effectiveness of the proposed solution is demonstrated by experimental results.

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Section: Flux Estimation Errormentioning

confidence: 99%

Self-Commissioning Algorithm for Inverter Non-Linearity Compensation in Sensorless Induction Motor Drives

Pellegrino

Guglielmi

Armando

et al. 2008

2008 IEEE Industry Applications Society Annual Meeting

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show abstract

“…The point here is to compensate for the errors introduced by the inverter non-linear drops in order to obtain an accurate voltage estimation, suitable for robust flux estimation. The stator resistance at start-up is also estimated, similar to offline estimation proposed in [12]. For maintaining the accuracy when heavy resistance detuning occurs other solutions are capable of updating the resistance estimate during the drive operation [8] and [9].…”

Section: A Flux Estimation Errormentioning

confidence: 99%

“…The equivalent voltage threshold V th defined in (12) and the overall series resistance estimateR s (= R s + R d ), where R d has been introduced in (11), can be estimated by means of the feedback signal v of the flux observer defined in Fig.1. The identification can be performed at the drive start-up and does not require the knowledge of the implemented dead-time or any data-sheet information about the adopted power switches.…”

Section: Feed-forward Compensation and Self-commissioning Algorithmmentioning

confidence: 99%

Self-Commissioning Algorithm for Inverter Nonlinearity Compensation in Sensorless Induction Motor Drives

Pellegrino

Guglielmi

Armando

et al. 2010

IEEE Trans. on Ind. Applicat.

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In many Sensorless Field Oriented Control schemes for Induction Motor (IM) drives the flux is estimated by means of the measured motor currents and the control reference voltages. In most of cases, the flux estimation is based on the integral of the back-EMF voltages. The inverter nonlinear errors (dead-time and on-state voltage drops) introduce a distortion in the estimated voltage that reduces the accuracy of the flux estimation, particularly at low speed. In the literature, most of the compensation techniques of such errors require the off-line identification of the inverter model and off-line postprocessing. The paper presents a simple and accurate method for the identification of the inverter parameters at the drive start-up. The method is integrated into the control code of the IM drive and it is based on the informations contained in the feedback signal of the flux observer. The procedure applies, more in general, to all those sensorless AC drives where the flux is estimated using the back-EMF integration, not only for IM drives but also permanent magnet synchronous motor drives (SMPM, IPM). The self-commissioning algorithm is presented and tested for the sensorless control of an induction motor drive, implemented on a fixed-point DSP. The feasibility and effectiveness of the method are demonstrated by experimental results.

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“…Various motor parameter identification and controller parameter tuning methods have been proposed [3,5,9,10,12,13,15]. The motor electric Downloaded by [George Mason University] at 04:56 05 June 2016 parameters that need to be identified include the stator resistance, the stator inductance, the mutual inductance, the rotor inductance, and the rotor resistance.…”

Section: Introductionmentioning

confidence: 99%

The Design and Implementation of Self-Commissioning Techniques for a Vector-Controlled Induction Motor Drive

Chan¹,

Liu²

1997

Journal of the Chinese Institute of Engineers

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This paper presents the design and implementation of self-commissioning techniques for a vector-controlled induction motor drive.Two key techniques are involved in the self-commissioning of a vector-controlled induction motor drive. The identification of the electric and mechanical parameters of motor and load, and the tuning of controller parameters that are to meet performance specifications in the various vector control loops, are proposed. The proposed techniques are further verified by experiments. Close simulation and experimental results are obtained.

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Fast and reliable commissioning of AC variable speed drives by self-commissioning

Cited by 17 publications

References 0 publications

Self-Commissioning Algorithm for Inverter Non-Linearity Compensation in Sensorless Induction Motor Drives

Self-Commissioning Algorithm for Inverter Non-Linearity Compensation in Sensorless Induction Motor Drives

Self-Commissioning Algorithm for Inverter Nonlinearity Compensation in Sensorless Induction Motor Drives

The Design and Implementation of Self-Commissioning Techniques for a Vector-Controlled Induction Motor Drive

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