Compensation of Zero-Current Clamping Effects in High-Frequency-Signal-Injection-Based Sensorless PM Motor Drives

This paper proposes an online compensation strategy for the unwanted disturbance voltage resulting from the zero- current clamping effect for high-frequency-signal-injection-based sensorless control schemes. We derive an analytical model that reveals intrinsic characteristics of the zero clamping ef...

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Bibliographic Details
Published in:IEEE transactions on industry applications 2007-09, Vol.43 (5), p.1258-1265
Main Authors: Choi, Chan-Hee, Seok, Jul-Ki
Format: Article
Language:English
Subjects:
Analytical model
Analytical models
Clamping
Clamps
Compensation
Electric potential
Frequency
Induction motors
Lookup tables
Mathematical models
Motor drives
Motors
offline commissioning test
online compensation strategy for the unwanted disturbance voltage
Saturation magnetization
Sensitivity analysis
Sensorless control
Testing
Voltage
Voltage distortion
zero-current clamping effect for high-frequency-signal-injection-based sensorless control
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Summary:This paper proposes an online compensation strategy for the unwanted disturbance voltage resulting from the zero- current clamping effect for high-frequency-signal-injection-based sensorless control schemes. We derive an analytical model that reveals intrinsic characteristics of the zero clamping effect for high- frequency signal injection. The model in this form is subsequently incorporated into the development of a specialized offline commissioning test to find motor inductances and a voltage distortion factor. From the sensitivity analysis of the effect on magnetic saturation, we confirm that the compensation error due to saturation has little negative impact on the proposed compensation method. The compensation result leads to an accurate position estimate in the zero-current clamping region. The proposed scheme does not rely on a complicated lookup table. Experiments demonstrate the superiority of the proposed method in suppressing the voltage distortions caused by the zero-current clamping effect.
ISSN:0093-9994
1939-9367
DOI:10.1109/TIA.2007.904409