Separation of saliency components for speed sensorless detection of flux and rotor position of induction machines

Wolbank, T.M.; Metwally, M.K.

doi:10.1109/icelmach.2008.4800253

Cited by 3 publications

(4 citation statements)

References 25 publications

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“…with the INFORM method [5] by applying, for instance, three equal test pulses consecutively in each phase of the IM and interpreting the current responses. With more sophisticated pulse patterns described in [6] and [7] errors due to resistive behaviour and induced voltages can be eliminated. In this research a pulse pattern similar to [7] is used which is described in detail in section 4.2.…”

Section: State Of the Art Position Estimation Algorithm Based On Injementioning

confidence: 97%

“…This can be achieved in a preferable way by a periodical injection of transient test pulses. With the already well known INFORM-Method [5] and its extensions, described in [6] and [7], sufficient modulation of the leakage path due to the main flux path must exist to ensure a proper operation. The described leakage path is highly dependent on the type of motor and therefore only measureable with so called "INFORM-friendly" motors [5].…”

Section: Introductionmentioning

confidence: 99%

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Speed Sensorless Detection of Rotor Flux Position for Induction Machines at Low Speed and Standstill

Dietrich¹,

Braun²,

Haag³

et al. 2014

7th IET International Conference on Power Electronics, Machines and Drives (PEMD 2014)

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This paper presents an advanced pulse pattern for saliencies based self sensing control of induction motors for electric vehicle drives. This allows a direct, accurate and parameter independent detection of the rotor flux position at standstill and low speed. The innovation of the proposed method is the reduction of the stator current to zero before each sequence of test pulses. This leads to a commutation of the magnetising current into the rotor leakage inductance and consequently to a saturation of this inductance in the same direction. Finally measurement results with the proposed injection sequence are shown and compared with state of the art methods.

show abstract

Section: State Of the Art Position Estimation Algorithm Based On Injementioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Speed Sensorless Detection of Rotor Flux Position for Induction Machines at Low Speed and Standstill

Dietrich¹,

Braun²,

Haag³

et al. 2014

7th IET International Conference on Power Electronics, Machines and Drives (PEMD 2014)

View full text Add to dashboard Cite

show abstract

“….From (1), (2) and (3), the stator induced current leads to: Last obtained formula consists in two components. First stator current component (at left) is so-called the positivesequence component proportional to the average stator transient inductance and contains no information on saliency position.…”

Section: Saliency Tracking By Hf Signal Injectionmentioning

confidence: 99%

“…The sources of saliencies are diverse, such as the saturation of the machine by the main flux, induced saturation, modification in opening of rotor slots and slotting effects [2]. The use of slotting effects for rotor speed estimation is the best method because it is not dependent on the machine parameters and not created by modification in rotor design.…”

Section: Introductionmentioning

confidence: 99%

Speed Estimation of Induction Motor at Low and Zero Speed using High Frequency Signal Injection for Rotor Slot Harmonics Detection

Damkhi¹,

Said²,

Naït-Saïd³

2024

RE&PQJ

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Rotor position estimation based on high frequency signal injection method represents the interesting way to provide the high performances of the AC drives sensorless controlled at low or near zero speed range. So, this method requires the existence of saliencies inside the IM particularly the presence of the slots where their design constitutes the main advantageous to exploit its effect for rotor speed monitoring. First, the present paper exposes a model of the induction machine including slotting effects which it can be exploited in order to extract the harmonic saliency created by rotor slotting. Second, the high frequency signal injection method is used in order to allow tracking the characteristic harmonic saliency due to rotor slotting from which the rotor position and speed may be estimated. A High frequency voltage signal injection creates a high frequency current modulated by the saliencies presented inside the machine. To extract information about rotor position, the resulting stator current treads to heterodyning process to eliminate the disturbance components and subsequently the rotor position may be extracted by a closed-loop observer. Simulation results are shown in order to verify the validity of the proposal and to confirm the effectiveness of estimation method at zero frequency.

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Slotting effects and high frequency signal injection for induction machine rotor speed estimation

Damkhi

Said

Naït-Saïd

2012

2012 International Conference and Exposition on Electrical and Power Engineering

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Separation of saliency components for speed sensorless detection of flux and rotor position of induction machines

Cited by 3 publications

References 25 publications

Speed Sensorless Detection of Rotor Flux Position for Induction Machines at Low Speed and Standstill

Speed Sensorless Detection of Rotor Flux Position for Induction Machines at Low Speed and Standstill

Speed Estimation of Induction Motor at Low and Zero Speed using High Frequency Signal Injection for Rotor Slot Harmonics Detection

Slotting effects and high frequency signal injection for induction machine rotor speed estimation

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