A novel hybrid speed estimator of flux observer for induction motor drives

Ide, K.; Park, Yong Ha; Sawamura, M.; Iura, Hideaki; Yamamoto, Y.

doi:10.1109/isie.2002.1025839

Cited by 11 publications

(10 citation statements)

References 7 publications

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“…With accurate motor parameter estimates, the adaptation law using (15) works well except at low speeds in the regenerating mode. The regenerating mode can be stabilized, for example, by using a modified error term [2].…”

Section: A Speed Adaptation Without Signal Injectionmentioning

confidence: 99%

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Flux observer enhanced with low-frequency signal injection allowing sensorless zero-frequency operation of induction motors

Hinkkanen¹,

Leppanen²,

Luomi³

38th IAS Annual Meeting on Conference Record of the Industry Applications Conference, 2003.

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Abstract-In sensorless induction motor drives, flux estimators based only on the standard motor model work well at sufficiently high stator frequencies, but they fail at frequencies close to zero. To solve this problem, a new observer structure is proposed, combining a speed-adaptive full-order flux observer with a lowfrequency signal-injection method. An error signal obtained from the signal-injection method is used as an additional feedback signal in the speed-adaptation law of the observer, resulting in a wide speed range, excellent dynamic properties, and zerofrequency operation capability. The enhanced observer is also robust against parameter errors. Experimental results are shown, including very slow speed reversals and long-term zero-frequency operation under rated load torque, as well as rated load torque steps and fast speed reversals under rated load torque.

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Section: A Speed Adaptation Without Signal Injectionmentioning

confidence: 99%

“…In [15], the high-frequency signal-injection method was combined with a speed-adaptive flux observer in a fashion similar to (17).…”

Section: B Speed Adaptation Enhanced With Signal Injectionmentioning

confidence: 99%

Flux observer enhanced with low-frequency signal injection allowing sensorless zero-frequency operation of induction motors

Hinkkanen¹,

Leppanen²,

Luomi³

38th IAS Annual Meeting on Conference Record of the Industry Applications Conference, 2003.

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show abstract

“…Meanwhile, the back EMF based method has been widely used in commercial products, but the controllable speed range is limited to more than about 5% of the rated speed. To operate the sensorless AC motor drives in the entire speed range, hybrid sensorless control combining both methods is one of the solutions, and several algorithms have been proposed [1]- [4]. The synergy effect to suppress the torque ripple produced by HFIM was first explained with an induction machine in [1].…”

Section: Introductionmentioning

confidence: 99%

Hybrid sensorless control of IPMSM Combining high frequency injection method and back EMF method

Ide

Iura

Inazumi

2010

IECON 2010 - 36th Annual Conference on IEEE Industrial Electronics Society

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This paper introduces a new hybrid sensorless control of interior permanent magnet synchronous machines (IPMSM) combining high frequency injection and back EMF based method. The proposed control system realizes position, speed, and torque control in the entire speed range. Owing to the reliability and the space-saving feature, the sensorless control is applied to direct drive applications with great expectations. As successful applications, an injection molding machine and a compressor are introduced in this paper. Experimental results show the effectiveness to the required specification of the control modes.

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“…The parameters α lp and γ i are varied according to (15), (16), and (8). The parameter γ p remains constant according to (16) and (8).…”

Section: Speed For Monitoringmentioning

confidence: 99%

“…An approach for combining the methods was already discussed in [15]. A hybrid scheme combining a fundamental-wave flux observer with an HF signal injection method is proposed for the rotor flux estimation of induction motors in [16]. For PMSM drives, a fundamental-excitation method is used at higher speeds and a signal injection technique (or a combined method) at low speeds in [17]- [19].…”

Section: Introductionmentioning

confidence: 99%

Sensorless control of PMSM drives using a combination of voltage model and HF signal injection

Piippo¹,

Hinkkanen²,

Luomi³

Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting.

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A novel hybrid speed estimator of flux observer for induction motor drives

Cited by 11 publications

References 7 publications

Flux observer enhanced with low-frequency signal injection allowing sensorless zero-frequency operation of induction motors

Flux observer enhanced with low-frequency signal injection allowing sensorless zero-frequency operation of induction motors

Hybrid sensorless control of IPMSM Combining high frequency injection method and back EMF method

Sensorless control of PMSM drives using a combination of voltage model and HF signal injection

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