A Demodulation Technique for Spindle Rotor Position Detection With Resolver

Aung, Nay Lin Htun; Bi, Chen; Mamun, Abdullah Al; Soh, C.S.; Yu, Yinquan

doi:10.1109/tmag.2013.2245316

Cited by 36 publications

(22 citation statements)

References 6 publications

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“…A resolver chip is used to decode the amplitude-modulated signal from U NACS and UNBDS to get the angular position [7,15,16]. The angle can be obtained as, β=arctanfalse(trueUNACSUNBDSfalse)=arctanfalse(sinfalse(N⋅ϕfalse)cosfalse(N⋅ϕfalse)false)=arctanfalse(sinθcosθfalse)…”

Section: Basic Principle and Designmentioning

confidence: 99%

Periodic Nonlinear Error Analysis and Compensation of a Single-Excited Petal-Shaped Capacitive Encoder to Achieve High-Accuracy Measurement

Hou

Zhou

et al. 2019

Sensors

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The measurement results of a single-excitation petal-shaped capacitive encoder show strong periodic characteristics for nonlinear errors. This paper presents the analysis of periodic nonlinear errors in a single-excitation petal-shaped encoder in terms of three main aspects—sensitive structure processing error, circuit demodulation error, and installation error. Analytical and simulation results confirm that the first-, second-, and fourth-periodic electrical errors are caused by the misalignment of circuit parameters, non-uniform segmentation of the processing error, and cross interference of the electric field, respectively. Further experimental investigation reveals that the mechanical periodic error is caused by installation misalignment. Based on these analytical, simulation, and experimental results, the design of the capacitive encoder was optimized and a method based on harmonic components was applied to compensate the periodic nonlinear error of the encoder. Measurement results shows that the prototype which has 180 petal-shaped numbers can achieve a reduction of periodic nonlinear errors to less than 0.02° and its accuracy can be improved to 0.0006° after compensation over the full measurement range.

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Section: Basic Principle and Designmentioning

confidence: 99%

Periodic Nonlinear Error Analysis and Compensation of a Single-Excited Petal-Shaped Capacitive Encoder to Achieve High-Accuracy Measurement

Hou

Zhou

et al. 2019

Sensors

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“…7. The output sine and cosine signals of the real-time resolver were then emulated in dSPACE from the calculated real-time reference position angle for the RSC controllers, θ conv , using the following equations [34]:…”

Section: Resolver Feedback Emulationmentioning

confidence: 99%

DFIG stator flux‐oriented control scheme execution for test facilities utilising commercial converters

Sarma

Tuohy

Apsley

et al. 2018

IET Renewable Power Generation

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The utilisation of conventional industrial converters for development of doubly-fed induction generator (DFIG) test facilities poses an attractive prospect as it would provide proprietary commercial protection and functionality. However, standard commercial converters present significant challenges in attainable DFIG operational capability. This is due to the fact that they are designed for execution of a limited set of pre-programmed common control modes. They typically do not cater for execution of complicated stator flux-oriented vector control (SFOC) schemes required for DFIG drive control. The research work presented in this study reports a methodology that enables effective implementation of SFOC on industrial converters through a dedicated external real-time platform and a velocity/position communication module. The reported scheme is validated in laboratory experiments on an experimental DFIG test-rig facility. The presented principles are general and are therefore applicable to conventional DFIG drive architectures utilising standard industrial converters.

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“…At present, software-based RDC methods of the resolver are usually implemented in the time domain [10]. In this method, the peak point is usually used to extract the envelope of the signal, but this will cause the resolution of the envelope signal to decline, and the rotor position calculated by the sampled values is inaccurate in the highspeed region when the excitation frequency is relatively low [11]. In software-based RDC, the arctangent or the angle tracking observer are often used to calculate the rotor position [12,13].…”

Section: Introductionmentioning

confidence: 99%

A Novel Technique for Resolver-to-Digital Conversion Using Principal Frequency Component S-Transform

2019

Journal of Electrical and Computer Engineering

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A novel technique for resolver-to-digital conversion (RDC) using principal frequency component S-transform (PFCST) is proposed in this paper. First, the mode envelope of two output signals of the resolver is extracted by PFCST. The envelope extracted by PFCST maintains the same time resolution as the original signal because it performs time-frequency conversion for each sampling point. Then, the quadrant of the resolver is determined by the judgment rule formed by the polarity of the optimum nonzero region of the signals, and the quadrant information is used to correct the arctangent to obtain the accurate rotor position. Finally, the simulations prove that the maximum angle error of the resolver estimated by this method occurs at the quadrant junction but does not exceed one deg., and the experiments are used to verify the effectiveness of the proposed method.

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A Demodulation Technique for Spindle Rotor Position Detection With Resolver

Cited by 36 publications

References 6 publications

Periodic Nonlinear Error Analysis and Compensation of a Single-Excited Petal-Shaped Capacitive Encoder to Achieve High-Accuracy Measurement

Periodic Nonlinear Error Analysis and Compensation of a Single-Excited Petal-Shaped Capacitive Encoder to Achieve High-Accuracy Measurement

DFIG stator flux‐oriented control scheme execution for test facilities utilising commercial converters

A Novel Technique for Resolver-to-Digital Conversion Using Principal Frequency Component S-Transform

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